what is the potential for 350 TBI trucks? i've heard figures in the 400 range in torque and 300 some horses if you keep it TBI.

what mods generally make what kind of power? like headers and intake on a 350?

please forgive my questions, just trying to learn

with a crate engine, does the original computer still work? what needs to be swapped?

how about a turbo 350, a strong NA 383, or even a turbo 383? what kind of numbers(hp and tq) and 1/4 mile times would i be looking at in a fullsize regular cab short bed silverado with some weight reduction with above combinations?

thanks for the help. i've heard this was a good board

 

Hey welcome aboard!

Your 350 TBI is a great platform for power. You find that TBI motors are more fuel limited than air flow limited. Like any other GM engine, yours will respond well to mods. Your 300hp and 400tq are very obtainable. Recent evidence has shown that with a little port work you should be able to retain the stock heads to support that power goal. You will need to choose a cam that matches the powerband that your truck will be used for.

As like any other fuel injected motor you will need to do ECM work to make it all run in harmony. There is no way you can reach your goal without touching the chip and reporgraming it. This will require you to buy the equiptment and do it yourself. Throughout your tuning process you will be able to tell what size injectors and TBI unit you will need (if you find the stockers won't feed your combo). You can use TBI on any crate motor and you can retain your stock sensors and ECM. You will have to do chip work as mentioned above, but that still retains the stock computer.

This is a just a super brief outlook of what you will be facing. Take some time and read the TBI stickies above to understand what makes these little motors tick. Most of the discussions focus on 305 TBI's but the same principals apply to your motor. You are also starting with a better platform with those extra 45 cubes that we don't have You will also want to make use f the search comand and do some research on 350 TBI motors and what people are doing with them to make the power levels you want.

 

thank you for your post. i'll do some searches and after a while if i can't find answers to question i'll post them here. thanks

 

Years ago I ran 15.3 in the quarter. With ported stock heads, 268 hi energy comp cam, hypercrap chip, headers, and dual exhaust. Tranny and every thing else stock.

The thing was a tourqe monster, not much top end though.

AC was functional, and weighed 4200lbs. Motor in a 3rd gen would have probably run lower 14's.

 

Id say for starters a good full length 3" exhaust + headers, better aircleaner, intake, and prom burning equipment would get you a good deal of the way to your goal. If you can run without a cat, you can also lean the midrange fueling out to something more reasonable. This can help get some extra torque and power in the mid range rpms that would normally be lost to having to pacify the cat with extra fuel.

If your going to go with another engine, I put my vote in for a 383 or some form of stroked 350 with a reasoably good set of aftermarket heads, vortecs, or worked over TPI heads, and a mild cam (relative to a 383). Itll have lots of displacement so itll make reasonable horsepower without having to rev and the extra throw will mean more torque to help push the pickup along.

Id say keep the powerband confined to no higher then around 5000 rpm, maybe less. You dont want to exceed the stock VE and timing tables too much. Also helps in the fueling department as a similarly powered higher revving 305 or 350 may run into idle fueling issues when your running large injectors and higher then stock fuel pressures.

 

thanks

im actually looking to get pretty fast , faster than 15s or 14s for sure. i think an LT1 camaro would be a lot cheaper to get to sub 13 seconds but it wouldn't be as cool as a truck