3.4L fuel system selection

[bszopi]

Hey, email me the PDF and I'll post it up for you.

[lumination]

p.s. I don't need no stinkin' 3-fitty to get power!

this is way off subject and isnt even a 60 degree motor i dont think, but there is an 80s model s10 at the local dragstrip with a carburated and well worked 4.3 smokin smallblocks, the fastest time I have seen it run is 11.23 and the guy drives it everywhere it is really a daily driver.

[Kreb]

I ran my first dyno session yesterday. There was no time to tune, but my max torque (wheels) was 167 at 3300 and the max hp 139 at 5000. The torque is satisfying, but the Hp dissapointing. I haven't really tuned it beyond seat-of-the-pants, so some time with a timing light, A/F meter and vacum gauge would probably do me wonders.

I just hope that the Offenhauser intake isn't holding me back. It's a better piece of workmanship than the Edelbrock, but a fairly knowledgeable friend says that it's designed as a torque manifold for 4X's and the like. In the back of my head though, I am thinking about that EFI setup that came with the original Camaro. With a megasquirt it might work pretty well - and that manifold would take a centrifugal SC nicely.....

[RacerX11]

I just hope that the Offenhauser intake isn't holding me back. It's a better piece of workmanship than the Edelbrock, but a fairly knowledgeable friend says that it's designed as a torque manifold for 4X's and the like. In the back of my head though, I am thinking about that EFI setup that came with the original Camaro. With a megasquirt it might work pretty well - and that manifold would take a centrifugal SC nicely.....

If you ever decided to get rid of the Offy let me know. I have some ideas on how to convert it to a single-plane intake for better top-end power.

Marty

[BMC]

Kerb,
If you have all stock internals otherwise, you may just want to install a set of 1.6 ratio rockers and try again. If i had a carb, i think that is the first and least expensive thing you can do from all accounts.
BTW, what gear ratios do you have in the gearbox and differential? If you dont know, just tell me the years and make of vehicle they are out of and we can give an edumucated best guess.

bszopi, I have sent you an email with the dyno chart... Thanks for offering to put it up!
-BMC.

[Kreb]

I've got an ARI stage II and 1.6 rockers in there. Carb is a Holley 390 and there's a pretty good set of headers on.

Rear end and gearbox are from a '92 S-10 2WD w/ 2.8. Engine is a 3.4off (I think) a 1994 Camaro.

[bszopi]

Here is BMC's dyno chart...

[BMC]

Brad,
Thanks for posting that. I am convinced we lost some upper end after the computer mods, but the lower end gained a little bit by seat of the pants before/after effects.

Kerb,
The 1992 S10, I believe has the same ratios in the gearbox as all the V6 Camaros. The earlier boxes, the ones i am aware of had a different ratio that was better for stump pulling. The standard 2WD S10 differential has 3.42 rear end ratio gears, which is exactly what we have in this car with a limited slip and a few other items, shortened to fit so your car is a good comparison to ours... You have 1400lbs to our 2200 estimated, so even in bench racing your car wins... I just hope you can shift as fast and keep the rubber down... if not, i might have a chance.

One fellow that i know always tells me that the fuel injection is better at torque, but the carb comes in better at high end BHP. By the sound of your numbers, this stands true. So your carb setup, headers and lifters are the biggest difference between the two otherwise same motors. I will love to hear your continuing story and if possible, scan a copy of that dyno chart in if you got one. Peak numbers are nice to hear, but overall chart is the best way to understand what a person is working with.

-BMC.