What I’ve heard was there were issues with fuel distribution when using a duel plane. Some cylinders ran dangerously lean under hard throttle. I’m pretty sure I heard the guys on Engine Masters make that comment when testing some intakes. It was not a test of the efi unit itself. Without a dyno and o2 sensor for every cylinder it would be difficult to know. Probably drag racers who were good at reading plugs could tell.
I’ve ran a Holley super sniper 1250 with a rpm air gap dual plane manifold on my 347 sbf in N/A trim for a year no issues and another two years boosted. Also if anyone is concerned about the dual plane not working, just get a 1 inch carb spacer and problem solved
That is the exact advice I have always given my customers but I wanted to explain why most work and one didn’t. So much false information floating around Facebook and other internet sources. Time to get some facts out there.
I just got the sniper xflow 800 plan on running it on my 347 with Paxton novi 2k and air gap intake. UPS delivered it yesterday. On sale at summit really cheap.
My dad and i messed around with this on an Air Gap and a Victor Junior. Dual plane can work pretty well if you run a spacer or hollow out the divider, but you will get a reading on the MAP that jumps around a bit which did cause minor issues at part throttle. In theory you do lose some of the low RPM/load benefits of a dual plane because EFI doesn't need the air velocity to draw fuel out of a carb, which is helped by dividing the barrels. But EFI does keep the benefits of the longer runners.
The thing is, with anything except the old terminator tbi there isn’t actually a problem to be solved. Spacers are great and anyone with hood clearance should be running them, but there isn’t actually a problem to solve with sniper and terminator x on a dual plane.
Like your channel, just subbed... So I have never messed with anything on an engine dyno but a carb. Getting ready to do a stock 454 BBC with a sniper with hyper spark. Stock 4 barrel intake. I have a buddy who knows his way around this system, he used to be lead calibrator at GM and then Chrysler in the Detroit area. He is telling me to be prepared to add plenum volume (spacer), I bet him a lunch that it will be fine as is.
Thank you for the subscription. There should be no need to add a spacer to make the system work properly, but like with any engine using an intake that doesn’t have a plenum there is a good chance it will make more power with a spacer almost every engine likes plenum volume to make power.
@@DirtySideGetsDown Thanks for the input, we just want it to have good air fuel ratio and drivability. He was arguing that it would cause big problems with not enough volume for the MAP to read correctly. He never encountered this exact scenario so he is just guessing. Sounds like it shouldn't be a problem according to you😁
I had same problem when I bought a Holley Terminator (original) years ago. Tried twice to fix, Holley and Edelbrock were no help. it's been in a box since. (Hunting after the Holley warmed to closed loop, I have the Edelbrock Air Gap performer manifold on a Ford 351W.) I still haven't tried round 3 - replacing the carb w/ the Holley Terminator again. Recently I acquired another Air Gap to cut the plenum divider down 1/2" and try one final time. Should I file the cut-down plenum divider to a "V" to minimize the turbulence below the throttle body? I see ONE other video on you tube that suggests this.
I’m sure the cut down divider will help with that system. An open spacer would too. As far as the shape, I don’t think it will matter. It’s mostly just equalizing the pressure on each side.
I have never heard that it wouldnt work. I have heard that it makes a funny noise if you dont use a spacer... And also that it runs better if you put a spacer on it
Just got my sniper 2 haven't put it on yet i have a 91 302 ho mustang engine stripped off all emissions stuff I'm using a 2 inch spacer will this spacer be a problem this 2 inch spacer helps performance greatly
Awesome! People always say it won't work but never why. Good stuff
Thank you sir!
What I’ve heard was there were issues with fuel distribution when using a duel plane. Some cylinders ran dangerously lean under hard throttle. I’m pretty sure I heard the guys on Engine Masters make that comment when testing some intakes. It was not a test of the efi unit itself. Without a dyno and o2 sensor for every cylinder it would be difficult to know. Probably drag racers who were good at reading plugs could tell.
I’ve ran a Holley super sniper 1250 with a rpm air gap dual plane manifold on my 347 sbf in N/A trim for a year no issues and another two years boosted. Also if anyone is concerned about the dual plane not working, just get a 1 inch carb spacer and problem solved
That is the exact advice I have always given my customers but I wanted to explain why most work and one didn’t. So much false information floating around Facebook and other internet sources. Time to get some facts out there.
That would be a good video. Ill look for it if youve already uploaded it.
Right on.
Great channel. Keep the great work!!!
I just got the sniper xflow 800 plan on running it on my 347 with Paxton novi 2k and air gap intake. UPS delivered it yesterday. On sale at summit really cheap.
Appreciate the video, and thanks for sending me your channel
My dad and i messed around with this on an Air Gap and a Victor Junior. Dual plane can work pretty well if you run a spacer or hollow out the divider, but you will get a reading on the MAP that jumps around a bit which did cause minor issues at part throttle.
In theory you do lose some of the low RPM/load benefits of a dual plane because EFI doesn't need the air velocity to draw fuel out of a carb, which is helped by dividing the barrels. But EFI does keep the benefits of the longer runners.
Use a 1/2" or 1" spacer. Figured this out 5-6 years ago with a fast TBI on a poncho 455 with a performer rpm
The thing is, with anything except the old terminator tbi there isn’t actually a problem to be solved. Spacers are great and anyone with hood clearance should be running them, but there isn’t actually a problem to solve with sniper and terminator x on a dual plane.
Good show!
Like your channel, just subbed... So I have never messed with anything on an engine dyno but a carb. Getting ready to do a stock 454 BBC with a sniper with hyper spark. Stock 4 barrel intake. I have a buddy who knows his way around this system, he used to be lead calibrator at GM and then Chrysler in the Detroit area. He is telling me to be prepared to add plenum volume (spacer), I bet him a lunch that it will be fine as is.
Thank you for the subscription. There should be no need to add a spacer to make the system work properly, but like with any engine using an intake that doesn’t have a plenum there is a good chance it will make more power with a spacer almost every engine likes plenum volume to make power.
@@DirtySideGetsDown Thanks for the input, we just want it to have good air fuel ratio and drivability. He was arguing that it would cause big problems with not enough volume for the MAP to read correctly. He never encountered this exact scenario so he is just guessing. Sounds like it shouldn't be a problem according to you😁
I had same problem when I bought a Holley Terminator (original) years ago. Tried twice to fix, Holley and Edelbrock were no help. it's been in a box since. (Hunting after the Holley warmed to closed loop, I have the Edelbrock Air Gap performer manifold on a Ford 351W.)
I still haven't tried round 3 - replacing the carb w/ the Holley Terminator again. Recently I acquired another Air Gap to cut the plenum divider down 1/2" and try one final time. Should I file the cut-down plenum divider to a "V" to minimize the turbulence below the throttle body? I see ONE other video on you tube that suggests this.
I’m sure the cut down divider will help with that system. An open spacer would too. As far as the shape, I don’t think it will matter. It’s mostly just equalizing the pressure on each side.
Will the sniper #2 work on a Ford stock 4 barrel intake manifold
I have never heard that it wouldnt work. I have heard that it makes a funny noise if you dont use a spacer... And also that it runs better if you put a spacer on it
Just got my sniper 2 haven't put it on yet i have a 91 302 ho mustang engine stripped off all emissions stuff I'm using a 2 inch spacer will this spacer be a problem this 2 inch spacer helps performance greatly
Spacers almost always improve things. They very rarely have negative side effects. If you have hood clearance for it I say go for it, 100%
Never stop asking people to subscribe, it is your right. Just dont do it before the content begins...that is tacky and offensive !!
Hi , i have a holley sniper 2300 and I want to use a dual plane intake wtith a holley 17-90 adapter , do you think can works ?
You shouldn’t have any problem with that at all.
@@DirtySideGetsDown
Thanks