2.5 power tricks
 

Hey guys i have a 1985 chevy s10 with a 2.5 5speed. Its a circle track truck. What im trying to do is get more power out of it. The motor has be be stock. But is there any power tricks that will help it out. The truck isnt really keeping up with everybody else. I dont have the cash to sink into boring it or putting a cam in it. Just was woundering if there was any cheep tricks to help it out. Thanks

Re: 2.5 power tricks
 

Have you removed the emission stuff? You probably don't need a mechanical fan. Install an electric fan with a manual switch. Advance the timing a few degrees. Go up until it pings then go back 1-2 degrees. Improve the air intake system. You can cut remove and reroute the air ducting.
Post a picture of the engine bay.

Re: 2.5 power tricks
 

I have the newer 2.2L and I added an electric fan, removed the heavy clutch fan, added a cold air intake, and bought a bored out throttle body (went from factory 52mm to 57mm) and it woke up my 2.2L a good bit.

Can you shave some weight? Just a couple hundred pounds will make a big difference. Remove all interior, remove/replace glass, cut out bed floor, etc??? Well, maybe cutting the bed floor would be bad, they're light enough in the ass as it is...

Re: 2.5 power tricks
 

while in competetion are you at wide open throttle? if not you could make the ECM think the engine is colder and/or is breathing colder air by altering the signals recieved by the ECM.
I had an 88 grand am 2.5 that I used to smoke the Honda guys with. granted I had a cam and a shaved head but the trick tuning made the biggest gains. I also had to run 93 octane gas once I eliminated the EGR.