Very informative! Just what i needed and this even before i was ready to tackle this issue. It was just pure luck i stumbled upon this video. Have just installed my Sniper EFI. Barely started to tune the system and today i had my first drive around the block. Had to lift of the gas pedal in first corner because of fear of losing control over my Firebird (400cid) rear end. It's not advisable using stock throttle linkage on Pontiac Firebird second gen based on my recent experience. Thanks for good tips!
Sweet rig! I will be getting this system for my 383 stroker that oddly enough looks really similar to yours in my 66 chevelle. Thanks for taking the time to make this video. I’m sure it will help lots of people out down the road.
@@IAMElectric369 I used the gold colored one- it’s the master kit that came with a fuel pump, the clamps, and a roll of fuel line. If I did it again I think I would buy the stealth kit with an external ECU. Another thing I would highly recommend is buying the progressive throttle linkage kit from Holley- the linkage that comes on these is way to aggressive and you will pretty much be doing burnouts every time you want to accelerate from a stop.
Swapped out my performer 2701 for an old school 1960's Holley Street Dominator single plenum. Agree with you on the throttle. Tried hooking my solid throttle linkage to my sniper and I was doing wheelies in my driveway. Ended up buying a Holley Dominator Carb throttle extension which bolts onto the sniper throttle and slows down the linkage so my 55 impala is manageable. Didn't know Chris had those progressive linkages on his site. He is a great resource for us.
Thank you so much for making this video. I have the same problem as you showed. Because of you know I know how to fix them. I really want to like the Sniper system, but so far is has not been fun. Thank you again.
Yea, this is definitely my last SBC or SBF build. All future builds will be with modern engines. With today's plug-n-play stand-alone systems, an LS engine is much easier to deal with than Holley or FI Tech fuel injection, and seems more reliable over the long haul.
Mines for street use and I'm nervous starting out when I can see a cop sitting there, just because it comes on so strong, I think I'll order this linkage!
Great video. Street machine or rock crawler, I think you are really addressing a different benefit as well. You want smooth, linear power across a broad range. That is the reason to use a dual plane manafold. The dual plane design pre dates the EFI and was optimised for a progressive opening carburetor. The original Sniper 1:1 linkage is really optimised for an open plenum design . Adding the progressive linkage lets you more fully use the benefits of the DP's higher velocity, smaller runners at lower rpm for better response.
Great info on the sniper. You should shop around for a return spring for the throttle I had one like that on my carb I in up using a single spring on my car it made it a smoother throttle
The spring isn't the problem, the problem is that the buggy wants to burn rubber with barely any throttle input (10%TPS). Not good for rock crawling. The progressive linkage and a little tuning solves this.
Excellent video, You should be sponsored by Holley, because I’m going to buy the Holley Sniper all I need to do is figure out what Air intake manifold to get to replace OE one on my Stock 91’Blazer with TBI(2 barrel).
Thanks for the tips, I'm installing one on my Jeep Honcho pre-runner right now. I had reservations about being able to service it in the desert if I had a problem. Have you had you had problems on the trail that you couldnt easily fix?
The linkage should come from Holley in as much as everyone has this problem requiring an additional investment of $15 to buy this modification. It was the first thing I noticed when test driving after sniper install. Reminds me of harley selling new bikes with quiet pipes when they know the roar is what attracts buyers and you then have to upgrade to after market pipes. Just give us what we pay for. Is that so hard? Jeez louise...
Does setting the progressive linkage on cause the software to turn the rear injectors off ? A little at idle would be good, however them just pulsing as in all 4 opening would seem to overfuel …🤔🤔
Thank you for your video. I purchased the new linkage and set the TPS at 50. My engine is in a jeep. Balanced 350 with RV cam and a 5 speed. It appears that it has a lot more top end yet to find but more important issue is that it is running super rich. Tons of un burned fuel in exhaust. What fuel settings might you advice for better fuel mileage? I've been fighting this thing for 2 years almost.
Thanks for the great video . Just bought canton spacer going to install it soon. Did you use gaskets for the top and the bottom of the spacer or just the phonelic spacer? Thanks
Good info Chris. I enjoy the vids. I’m running a 2601 Edelbrock air gap that has the spreadbore/squarebore dual pattern. Was going to run the thin adapter plate and the Canton spacer on my new MSD Atomic set up. You ever thought about milling down the center divider in the intake like the rpm air gap? Lots seem to think it helps with gremlins in they have. You on Instagram? Thanks
Great information! I have the same problem with it being too aggressive. So I ordered the linkage and extra SD card. I take it the system will have to "learn" all over again whether I replace the card or not?
Hi, good video What was your normal fuel consumption with 4 port carburetor / mile? And fuel consumption today with injection / miles? Bought a Mercery Marauder 1969 with 429 BigBlock and draw 3L / mile when driving calmly with 4 port carburetor. Is it profitable to buy injection if you are thinking of reducing fuel consumption? Grateful if you can give me an answer to the question .. Sincerely Benny Norman Sweden
Hey Chris, first- great video. I’m contemplating a sniper setup on a 67mustang so I’m trying to educate myself. I currently run a dual plane intake ( eddy performer) should I plan on going to a single plane or do you find folks can make them work satisfactory? Preciate any tips on equipment!
So I should be able to take my sd card to a mechanic and have them do the AE correction, i dont have a computer, and I need the throttle linkage... I havent been able to drive my car enough to even know if the sniper was worth putting on yet. Thanks for the good info!
i just installed this linkage on my big block and did the TPS thing on the hand-held, and it really runs like absolute dogshit between 20-43% throttle when the secondaries open up. I'll try the tip-in adjustment on the laptop tomorrow and see if that fixes it.
@Chris DesertDog, I just added the progressive linkage to my Super Sniper. The AE Correction vs TPS tip helped a lot. Cleaned up responsiveness. But I have noticed at slow throttle tip in it does hesitate. Does yours?
What is the actual whistle sound from - wondering if its bad? Been running the sniper for a few years and mine and have it too. I'm going to try the spacer. I thought my starter or transmission was making that noise.
I don't believe that the whistle hurts performance; it's just annoying. But, adding the spacer keeps the Sniper unit, computer included, cooler; which is a good thing.
Hi nice vid, can i ask when you changed the tps/ae setting why it got higher on the graph when the original settings shows it going lower as the more tps , looks like at 60% tps it was 100 and drops to 0 % at 100 % tps , when i first fitted the linkage and set my controller at 40% i noticed a shit load of fuel being pumped in the front 2 only instead of a fine trickle in all 4 venturies does this change after you adjust the ae vs tps
Couldn’t you have used an open phenolic spacer rather than hunting down a specific 4-hole? I have an Edlebrock Air Gap and have heard the Sniper runs better with an open spacer using an Air Gap intake.
Unfortunately, if you brows the Sniper forums, you will see that people have lots of issues with the open spacers, which completely went away with the 4-hole design.
Because I wasn't opening them all the way in the video; I was trying to show the transition between the primaries and secondaries, not WOT. My secondaries open to 97%, which is plenty.
@@chrisdesertdog2162 3% LOSS is still a loss witch equals loss of power.In any type of car building you want free flowing( laminar flow ) air especially In high velocity conditions.I am not knocking you I am just conveying information.
As long as it has no Vacuum its got enough flow, It has more than enough CFM without opening all the way if its not enough you will build intake Vacuum at WOT. I know this is Old but some people have no clue.
Great advice with the spacer keeping the heat down. Just bought one thanks to you.
Very informative! Just what i needed and this even before i was ready to tackle this issue. It was just pure luck i stumbled upon this video.
Have just installed my Sniper EFI. Barely started to tune the system and today i had my first drive around the block. Had to lift of the gas pedal in first corner because of fear of losing control over my Firebird (400cid) rear end. It's not advisable using stock throttle linkage on Pontiac Firebird second gen based on my recent experience. Thanks for good tips!
Sweet rig! I will be getting this system for my 383 stroker that oddly enough looks really similar to yours in my 66 chevelle. Thanks for taking the time to make this video. I’m sure it will help lots of people out down the road.
I’m doin the same thing on my 88 K1500 4x4. 383 stroker. What sniper kit are you gonna use? I’m still researching.
@@IAMElectric369 I used the gold colored one- it’s the master kit that came with a fuel pump, the clamps, and a roll of fuel line. If I did it again I think I would buy the stealth kit with an external ECU. Another thing I would highly recommend is buying the progressive throttle linkage kit from Holley- the linkage that comes on these is way to aggressive and you will pretty much be doing burnouts every time you want to accelerate from a stop.
Swapped out my performer 2701 for an old school 1960's Holley Street Dominator single plenum. Agree with you on the throttle. Tried hooking my solid throttle linkage to my sniper and I was doing wheelies in my driveway. Ended up buying a Holley Dominator Carb throttle extension which bolts onto the sniper throttle and slows down the linkage so my 55 impala is manageable. Didn't know Chris had those progressive linkages on his site. He is a great resource for us.
"55 Impala?
Can confirm it also sucks in a street car. I have a 302 with a manual trans and there is no ability to modulate the throttle.
I have a 305 with a manual and it’s all or nothing
Dang, that's a clean engine. Spotless!
I’ll have to reread the manual again, I don’t remember it saying to run a secondary return spring. Good to know, I’m installing mine now.
Your wiring looks pretty good! I'm going through hell with that now trying to clean up the mess of wires on the firewall
Thanks mate, good info.
Great video, presented so all can understand 👍
Thank you so much for making this video. I have the same problem as you showed. Because of you know I know how to fix them. I really want to like the Sniper system, but so far is has not been fun. Thank you again.
Yea, this is definitely my last SBC or SBF build. All future builds will be with modern engines. With today's plug-n-play stand-alone systems, an LS engine is much easier to deal with than Holley or FI Tech fuel injection, and seems more reliable over the long haul.
Great info! Subscribed.
Very informative thank you for the video
Mines for street use and I'm nervous starting out when I can see a cop sitting there, just because it comes on so strong, I think I'll order this linkage!
amazing video man thank you
Great video. Good information.
Great video. Street machine or rock crawler, I think you are really addressing a different benefit as well. You want smooth, linear power across a broad range. That is the reason to use a dual plane manafold. The dual plane design pre dates the EFI and was optimised for a progressive opening carburetor. The original Sniper 1:1 linkage is really optimised for an open plenum design . Adding the progressive linkage lets you more fully use the benefits of the DP's higher velocity, smaller runners at lower rpm for better response.
You are king....thanks for a great, great upgrade tip....
Great info on the sniper. You should shop around for a return spring for the throttle I had one like that on my carb I in up using a single spring on my car it made it a smoother throttle
The spring isn't the problem, the problem is that the buggy wants to burn rubber with barely any throttle input (10%TPS). Not good for rock crawling. The progressive linkage and a little tuning solves this.
Looking good
Excellent video, You should be sponsored by Holley, because I’m going to buy the Holley Sniper all I need to do is figure out what Air intake manifold to get to replace OE one on my Stock 91’Blazer with TBI(2 barrel).
Did you ever make the change? Thinking of doing the same on my 90 K5.
Very good
They should make the whole Sniper out of Composite plastic Except the ECU cover..That need to stay aluminum with raised areas to help aid cooling...
good stuff!
Thanks for the tips, I'm installing one on my Jeep Honcho pre-runner right now. I had reservations about being able to service it in the desert if I had a problem. Have you had you had problems on the trail that you couldnt easily fix?
I can not find your link to the spacer.
The linkage should come from Holley in as much as everyone has this problem requiring an additional investment of $15 to buy this modification. It was the first thing I noticed when test driving after sniper install. Reminds me of harley selling new bikes with quiet pipes when they know the roar is what attracts buyers and you then have to upgrade to after market pipes. Just give us what we pay for. Is that so hard? Jeez louise...
Does setting the progressive linkage on cause the software to turn the rear injectors off ?
A little at idle would be good, however them just pulsing as in all 4 opening would seem to overfuel …🤔🤔
My quick fuel carb is touchy like that
Thank you for your video. I purchased the new linkage and set the TPS at 50. My engine is in a jeep. Balanced 350 with RV cam and a 5 speed. It appears that it has a lot more top end yet to find but more important issue is that it is running super rich. Tons of un burned fuel in exhaust. What fuel settings might you advice for better fuel mileage? I've been fighting this thing for 2 years almost.
try adjusting your afr (air fuel ratio) in the settings
Thanks for the great video . Just bought canton spacer going to install it soon. Did you use gaskets for the top and the bottom of the spacer or just the phonelic spacer? Thanks
I used gaskets on both sides of the spacer. Probably not needed, but Cheap insurance to avoid vacuum leaks.
Good info Chris. I enjoy the vids. I’m running a 2601 Edelbrock air gap that has the spreadbore/squarebore dual pattern. Was going to run the thin adapter plate and the Canton spacer on my new MSD Atomic set up. You ever thought about milling down the center divider in the intake like the rpm air gap? Lots seem to think it helps with gremlins in they have. You on Instagram? Thanks
They make one with smaller secondaries now.
Great information!
I have the same problem with it being too aggressive.
So I ordered the linkage and extra SD card. I take it the system will have to "learn" all over again whether I replace the card or not?
Yep. Always let it relearn when you make any changes. Mine got noticeably better after a couple offroad trips..
Do you use a gasket on both sides of the spacer?
Hi, good video
What was your normal fuel consumption with 4 port carburetor / mile?
And fuel consumption today with injection / miles?
Bought a Mercery Marauder 1969 with 429 BigBlock and draw 3L / mile when driving calmly with 4 port carburetor. Is it profitable to buy injection if you are thinking of reducing fuel consumption?
Grateful if you can give me an answer to the question ..
Sincerely
Benny Norman
Sweden
Hey Chris, first- great video. I’m contemplating a sniper setup on a 67mustang so I’m trying to educate myself. I currently run a dual plane intake ( eddy performer) should I plan on going to a single plane or do you find folks can make them work satisfactory? Preciate any tips on equipment!
Keep the dual plane, especially for a street machine.
So I should be able to take my sd card to a mechanic and have them do the AE correction, i dont have a computer, and I need the throttle linkage... I havent been able to drive my car enough to even know if the sniper was worth putting on yet. Thanks for the good info!
Your mechanic probably won't know what to do. A professional tuner will.
i just installed this linkage on my big block and did the TPS thing on the hand-held, and it really runs like absolute dogshit between 20-43% throttle when the secondaries open up. I'll try the tip-in adjustment on the laptop tomorrow and see if that fixes it.
Hope it works for you. Mine did the same thing, and the adjustments in the AE Correction vs TPS table fixed it.
@Chris DesertDog, I just added the progressive linkage to my Super Sniper. The AE Correction vs TPS tip helped a lot. Cleaned up responsiveness. But I have noticed at slow throttle tip in it does hesitate. Does yours?
I have not had that issue, but tip-in is tunable.
Are you able to get WOT on the secondaries with the new linkage?
I get 97%, which is more than I will ever need. You can "fine tune" the linkage by bending the ends slightly if you want it to bottom out.
What is the actual whistle sound from - wondering if its bad? Been running the sniper for a few years and mine and have it too. I'm going to try the spacer. I thought my starter or transmission was making that noise.
I don't believe that the whistle hurts performance; it's just annoying. But, adding the spacer keeps the Sniper unit, computer included, cooler; which is a good thing.
hey chris great vid where do you get the holley sniper software?
Free download online from Holley's website.
Hi nice vid, can i ask when you changed the tps/ae setting why it got higher on the graph when the original settings shows it going lower as the more tps , looks like at 60% tps it was 100 and drops to 0 % at 100 % tps , when i first fitted the linkage and set my controller at 40% i noticed a shit load of fuel being pumped in the front 2 only instead of a fine trickle in all 4 venturies does this change after you adjust the ae vs tps
Hey Awesome video, would you recommend the Holley sniper? Would you consider it to be reliable for a daily driver?
At this point, after years of use; I do not recommend it.
A little off topic but I have the same motor in my rock buggy. Wonder what PCV system you have running on that? Need to fix mine and was curious.
Subscribe to my channel and watch my video titled: "PCV delete for the rock crawler"
There is an adjustment for throttle sensitivity
Jeremiah Hively Where?
Is there a way to tune the AE without a laptop? I have the progressive link, but want to eliminate extra fuel loadup???
I don't think so.
Couldn’t you have used an open phenolic spacer rather than hunting down a specific 4-hole? I have an Edlebrock Air Gap and have heard the Sniper runs better with an open spacer using an Air Gap intake.
Unfortunately, if you brows the Sniper forums, you will see that people have lots of issues with the open spacers, which completely went away with the 4-hole design.
Does secredrys still open all the way? Or do you lose some cfm?
Yes. They open to the same point they did with the 1:1 linkage, they just don't start opening until 41% TPS is reached.
@@chrisdesertdog2162 thanks for the response
DUDE YOU NEED MORE CONVERTER !!
Not in a rock buggy. Trans will overheat VERY quick with high stall in a rock crawler, and will be hard to control in technical sections.
Do you have a part number for the throttle return spring bracket?
justin thomas that’s what I needed
Anyone figure this out. Trying to find the bracket
I bought a different brand Holley has issues
Where did you get the throttle return spring bracket?
autozone
Nice buggy...
Throttle is really dumb on the sniper i hate that too.
It don't look like the secondarys are opening all the way if this is true you are losing power.
Because I wasn't opening them all the way in the video; I was trying to show the transition between the primaries and secondaries, not WOT. My secondaries open to 97%, which is plenty.
@@chrisdesertdog2162 3% LOSS is still a loss witch equals loss of power.In any type of car building you want free flowing( laminar flow ) air especially In high velocity conditions.I am not knocking you I am just conveying information.
As long as it has no Vacuum its got enough flow, It has more than enough CFM without opening all the way if its not enough you will build intake Vacuum at WOT. I know this is Old but some people have no clue.