GM 2.2 or 2.5?

[XTREE]

posting for a friend. Racing an s-10 in a stock truck class. Rules say engine must match make and model or truck, regardless of year. Trying to decide whether to go with the fuel injected 2.2 or 2.5 liter carbureted. I need to get a transmission also, so i don't have to worry about what will bolt up. What are your thoughts? Power, durability, etc...?

if you can run a 2.3 ford in this class you will save money. The harmonics is the killer in 2.5 super duty motors. If you go with the super duty spend the monet on all the little details. Supur duty cranks, the pontiac super duty head [aluminum with the shaft rocker setup] s.d. Intake, isky makes the best cams for them [roller cams] an s-10 2.5 block will work but the 5 cam bearing s.d. Block is best. Small block chevy rods will work on them. I could go on but 6800 to 7200 rpm is the bad point on the harmonics. If you get this motor right you will not be out powered by another down the straights. Good luck!!!!!

[dannyracer6]

I had one built by an engine builder in San Diego CA a few years ago based on an s10 block and an s10 cross flo head. Used Crower Rods on a specially prepared Stock crank, Trw Pistons .040, an Isky cam, solid flat tappet cam, 1.7 roller rockers and the block was prepped for a better oiling pattern, whichis a real weak spot on the 2.5, Oil wants to stay in the top too long. I spent almost 7 grand, back in 1997 which then was a lot. Raced it in Colorado and won a ton of races before I sold it and it won a bunch after that. I never turned it over 6800 and it was a rocket on the straights, and torque on the corners. used an efi intake with a 500 holley carb. It was fun to beat up on some of the fords and toyotas back then. However, I would not run one again simply because it costs too much and they are hard to keep together without a lot of work, compared to what I can build a 2.3 ford for. Too b ad, I really liked the sound and performance of my little monza. Good luck.

[Dan32]

looks like someone had to make a new screen name just to post their BS (turning severe rpm's)

i guess ur trying to call someone out?? my name is the same and my game is the same !! still turning 8900 to 9600 and winning glad to know you remembered!!!!! :P

[Racedad]

Random Observations 4 cyl GM vs Ford

2.2 GM 94-up alumiunm pushrod head has awesome stock ports. Probably makes big HP with a cam and some compression but we have blown up a few bone stock bottom ends racing so we never dared to try.

I think if you changed out most of the bottom end with high dollar parts it would (as the does the 2.5 GM) make a hot little motor.Maybe a dominating one but at what cost?This is MINI STOCK racing for crying out loud.

We race radical cammed up 11:1 heads on BONE stock 2.5 Ford bottom ends with huge miles and they don't break.Multiple seasons/multiple trucks.When we first started racing pickups we and our competitors ran stock 2.2 and 2.5 GM without cams or milled heads and the bottom ends only lasted a handful of races at best.

2.2/2.5 GM most probably WON'T stay together racing,2.3/2.5 Ford most probably WILL stay together.HUGE difference.

And all this is from a GM lover. Only an idiot remains blinded in light of hard facts and shared experience of those that have been there and tried.

[XTREE]

i had one built by an engine builder in san diego ca a few years ago based on an s10 block and an s10 cross flo head. Used crower rods on a specially prepared stock crank, trw pistons .040, an isky cam, solid flat tappet cam, 1.7 roller rockers and the block was prepped for a better oiling pattern, whichis a real weak spot on the 2.5, oil wants to stay in the top too long. I spent almost 7 grand, back in 1997 which then was a lot. Raced it in colorado and won a ton of races before i sold it and it won a bunch after that. I never turned it over 6800 and it was a rocket on the straights, and torque on the corners. Used an efi intake with a 500 holley carb. It was fun to beat up on some of the fords and toyotas back then. However, i would not run one again simply because it costs too much and they are hard to keep together without a lot of work, compared to what i can build a 2.3 ford for. Too b ad, i really liked the sound and performance of my little monza. Good luck.

yes the oil does stay up top. The later pontiac super duty heads were channeled to get the oil to drain lines running back to the pan. The super duty cranks is the wy to go intake also. But awesome tor and power. The sound of the fine tuned ones are unmistakable. Ive had good succes with these motors, but at a high price tag. I run crate now in n.c. And it's much cheaper and even pays to be there,, before i paid to be there.