Thread: 1994 454 tbi help

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Hey guys I'm new to this and I need help I have had 3 454 powered trucks in my life and just now started caring about power lol it is a 1994 extended cab long bed 2500 I love the truck and it's great to have around I pull trailers with it usually once a week anywhere from 3000-6000 lbs so not much weight but it's also my daily driver this truck is bone stock exhaust and everything and it's time for that too change I want a little speed out of it I want to be able to be pulling up black mountain and be able to too the mountain at at least 65 cause I can't even do it at 50 pulling it's a 2wd truck so it will be lowered i thought about changing gear ratio an I'm looking for a few power adders and some stuff to make it more fun to drive and pull with trying to stay as cheap as possible please help

Turn air cleaner top plate over upside down to open air cleaner to element more----------probably already running 4.11 gears?????? little over 3000rpm cruising????????? 6 mile per gallon?????




Sorry-mine was a 1984--------------------disreguard

We'll 410 gears and about 2700 at 75mph bout to get a little smaller tires thy r stock 31 inch tires right now soon to be a set of 28 inch tires and about 7 mpg

Originally Posted by crowe45

We'll 410 gears and about 2700 at 75mph bout to get a little smaller tires thy r stock 31 inch tires right now soon to be a set of 28 inch tires and about 7 mpg

IMO you're making a big mistake changing to a 28" tire. Run the numbers on your cruise rpm change and you may be shocked. I'd be thinking of going up to 32's, 33's, or even 35's.

Rspears::: I am wanting to change gear also down to at least a 355 before the tire change and trust me I would go bigger if it was 4wd

I would think the cheapest way to gain some ponies is a cold air intake, good set of headers with 3 inch free flow exhaust. And find a company that can supply you with a custom burnt prom for the ECM/computer.

How much would each of this cost and where would I find a company like that

Originally Posted by HWORRELL

I would think the cheapest way to gain some ponies is a cold air intake, good set of headers with 3 inch free flow exhaust. And find a company that can supply you with a custom burnt prom for the ECM/computer.

Originally Posted by crowe45

Rspears::: I am wanting to change gear also down to at least a 355 before the tire change and trust me I would go bigger if it was 4wd

I agree with HWORRELL, and to me the choice of gears doesn't change my opinion on the tire size for your truck. Dropping down 3" in tire OD is going to look strange in the wheel wells of the truck, IMO. That said, it's your truck and only you have to like the result.

Originally Posted by crowe45

How much would each of this cost and where would I find a company like that

Man. I don't know the cost of any of it,just know thats your cheapest option with out doing engine mods ( SPEED COSTS,HOW FAST YA WANNA GO ?). You'll have to do the leg work yourself,Summit, Jegs or Speedway would be the best shot on the headers and cold air setups. Don't cheap out on the headers get the good ones with the thick flanges or you'll chase exhaust leaks fore ever. As far as the Prom you can just google search it.

Might try these folks for the Prom.GM TBI Products :: Parts & Accessories :: Calibration Proms & Mem-Cals - Howell Engine Developments, Inc.