The Ultimate TBI Mod & Intake Manifold Install, 1992 C1500 350 SBC.
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- Опубліковано 21 сер 2024
- This Small Block Chevy 350 is 190 HP stock. I researched all the modifications I had completed on my truck and researched what the internet said how much HP each would add. Either advertised on the parts or on a random forum. Hooker long-tube headers - 20 HP, dual exhaust - 15 HP, TBI spacer - 18 HP, bigger high-flow air cleaner - 5 HP, removing air cleaner spacer - 12, Holley Pro-Jection Intake Manifold (PN:300-66) - 30 HP, TBI injector spacer - 13 HP, 15 PSI fuel regulator spring - 22 HP, smoothing out the TBI face “ultimate TBI Mod” - 12 HP, Total HP gain - 147 HP. I know HP gain doesn’t work like I’m estimating only about 30 HP gain total.
A few weeks ago I found a small coolant leak around the intake of my Small Block Chevy 350. After ignoring it for a while then misdiagnosing it. I thought the intake gasket on my engine was leaking coolant. I ordered new intake gaskets, and they were back ordered for a while. While these parts were backordered I was allowed to ponder. I eventually ordered all the recommended parts to make a SBC TBI gain more HP. I took advice straight from the internet and ordered all the parts to make my engine run at peak performance. Let’s see if the mods actually do anything. This video isn’t a ‘How to’ video, it’s a ‘how I did it’ video, it’s for entertainment purposes only.
Easiest way to install a distributor is set the balancer to the desired initial timing on the tab, install the distributor with the rotor pointing to the number 1 terminal.
This is with the engine on the number one cylinder of course!
When you start it up, check timing with brown wire unhooked.
I thought I was on tdc but was not.... oops
I just installed an Eaton TruTrac posi with 3:42 in my 89 long bed. Made quite a difference and it's maintenance free! I like your mods on this vid. 👍
I will eventually do that. I need to get her back running first.
Our biggest bang (also biggest expense) was a Banks header and down pipe system.
I think my most expensive bolt on are my hooker headers. I think I bought and installed them in 2009.
I bought special intake manifold for 98 vortec engine 350 it's running great ari gap intake manifold. The 98 vortec engine from a van I put it in my 89 GMC Sierra 3/4 . It literally picks up the front end up on the air. Ya I bolted shorty headers to stock y pipe
Intake and exhaust upgrades are the first & best upgrades I believe.
Great job
Thanks.
Get yourself a small ultrasonic bath.
10 litre is good , great for cleaning small parts and bolts.
I use 50/50 simple green or Ultra Gunk and water
I got one a couple months after I filmed this
I spaced the throttle body but used factory regular spring on a 92 GMC Sierra. Used new fuel injectors.
I think that's the way to go I removed the heavier spring
@@crescenthammer I used the longest new spring that is still a tad shorter than the original, truck runs way better, together with new fuel injectors. I have rebuilt this throttle body before but never changed the spring. I would start it cold and the engine pulsated, so I began to blame the fact I never changed the spring. After installing every sensor I could find, I missed the knock sensor, changing that solved a lot of running rich issues. I changed the Intake Manifold gaskets 7 times, the 7th I did myself using OEM gaskets with NO solicoln. Fel Pro gasket company said do not use ours we do not make gaskets for a 92 GMC Sierra, they fit but the rear ports are not made for that truck. Both Edlbrock and Fel Pro said do not use silicoln, very interesting, but hay the truck runs perfect.
@etmesi if it works it works
1994 Crusader TBI 454 GM gas boat engine is 320hp out the gate. So you've basically created a big block
Without adding any displacement. Engines are just air pumps
Got all the mods. Trying something different you may be interested in
Im boaring my throttle body ports out 0.075 larger. Got toake more butterflies. The oxygen and intake sensor should compensate for it. Then a lt1 roller Cam factory. Since i have the parts already.
Unfortunately, this engine has done as much as it can. She has let go, and I'm doing an LS Swap. Basic, I know. I'd like to rebuild and use this engine for another project, but due to budget restrictions, I'll have to ask this engine.
No point of modding 350tbi motors just swap engines 💯
Unless you don't have time or money for a swap
@@crescenthammerSave a bunch of money/thousands just by adding some bolt-on HP versus new engine and wiring harness, etc. 300hp is definitely adequate for a truck and 99% of needs. I agree with you.
@FrugalPandaTravels turns out I don't have time or money for a swap. But I already went too hard and bought an engine and trans. I'm into too far now.
Bro, that's just dumb to say that.
You can get great results with few mods, correct tuning and throw in the cheap transmission accumulator 1-2 & 3-4 upgrades.
End of the day these are farm trucks but you can have a lot of fun in them for cheap.
@Nzchimeran the 350 is blown up and auto transmissions are boring.
Could be the marketing dept.,s , promised hp. gains , are somewhat misleading and extreamly opptomistic ,should be taken with a grain of salt ? I too did most of what you did ,TBI wise , and had an underwelmd result. Got better results with an MSD system install and all new sensors . Gained a 7 mpg. inprovement . Had to go back to pretty much stock on the TBI except to rebuild it,was getting a "chug-chug "coughfing on the highway otherwise. Could be I need a few more tweeks to be able to get the spacer and injector risers to do what was promised .I,ll keep tinkering . Have another set of ' swirl ' (193 ) heads and TBI aluminum intake I,ll be porting and maybe ad a low rpm cam for my "92 350 K-1500 -700 R trans. Shooting for more low rpm power and 23 mpg,s at highway speeds .
O absolutely, if a bolt on part says it will gain you X amount of more hp. They added that part and then had their team work on tuning, put high octane fuel, great dyno conditions, etc. You can't just add up the hp gains.
The biggest thing to help my truck would be to start running 91 octane, adjust timing for 91 octane, and tune it for the modifications. With the stock tune and running 87 cause it's cheapest is killing my hp. I didn't do that cause the cost vs. benefit. Someday I hope to completely rebuild the truck.
Hi! Do you remember the partnumber on our headers? I have a c2500 -88 and i cant find any place that says this fits your car.
I don't know the part number. I got them for a Christmas present way back in the day. They're hooker longtube headers for an obs chevy. I believe my Santa got them from Summit.
Sorry I can't be any help on this. Here in a couple of months, they're going to be for sale.
@@crescenthammer Thax anyway 😃
@johanwallqvist646 Honestly, I'd go to JEGS website or call them. I've had great luck with their help line.
How on earth will you fit all those horses under the hood?
I manage,
@kennybayliss3706
www.mechanicsurplus.com/products/2789252756
Like to see how you installed the coolant temperature sensor on the intake for the computer? Did you need a adapter and if so what size or part number
That was the only thing that didn't need an adaptor
Those clamps were definitely made by the devil. I'd like to meet the s. o. b. Who designed them. When they flip around on you so you can no longer squeeze them it really sucks.
Agreed. The worst
Were did u buy the bigger gasket for the injectors to raise injectors more up
www.summitracing.com/parts/trd-2457
Or cheaper options are:
a.co/d/3wCPeYl
Tow mirrors 50 horse power window sticker 5 horsepower
Tow mirrors are negative horsepower and usually brain cells
350 5.7 is 210hp stock
180 to the wheels though right?
@crescenthammer dyno tests are more in the 160 range actually. I'm thinking about doing a turbo build on my tbi. Turns out the stock tbi system can handle about 8psi or more with just a different pump. I just did the pump yesterday. Next most important part is the fuel bypass regulator that runs off boost pressure I believe. I think 1 to 1 or 4 to 1 is good and zero degrees base timing. Rn Mines at 10 degrees base timing.
@silverpandaws6230 That sounds badass. I would be interested to see how that works out. Ya might get the 454 tbi to have less restriction. Just because the 454 have bigger throttle body's.
Nothing you can really do and 315 is a pipe dream
Yeah, the advertised hp gain is always false
I have that intake on my car made a black and white difference did u feel a big difference also
I couldn't feel that big of a difference, but my engine was pretty tired at the time.
@crescenthammer my engine is a 305 and everything you had to do to make it work I did to it crazy you ran into the same problems thanks for replying
@joshup1275 it has potential to add a lot of air flow. I blew my engine up 6 months later. Now I'm being basic and doing an ls swap.
@crescenthammer sweet I just thought about putting a ls yesterday but with tbi and ls motor
@joshup1275 The tbi is a major air restriction. I don't know if you could get an intake to fit.
yeah, if little bit is good whole is better.
Agreed, if it's worth doing it's worth over doing
Where can I get an equal intake
I ordered it from speedway motors
Does not sound right to me
Well I'm in the process of swapping it out
Best mod would be an LS swap.
That's what I'm doing now. The 350 was getting pretty bad
@crescenthammer 👍🇺🇸
I told my son the same thing. I gave him my 91 stepside, and he wants to do mods I did 20 plus years ago. I told him a TBI setup isn't worth it. All those mods and parts for that fuel setup are a gimmick waste of money.
@2015_Rubicnn the 350 is a good engine. You can make decent power with it. But the tbi max I want to say is 350 at the crank. So knowing that I wanted to go 4 barrel and/or efi. To rebuild everything, I just made a decision to go with the ls.
In my opinion, the LS has the best aftermarket of any engine.
just rotate the tires
Why
its too bad you don't know how to set timing.
I did set the timing just took a while