srt rods& pistons

nolaneon · Post by **nolaneon** » Tue Mar 29, 2011 6:17 pm

if i rebuild a 2.4 from a pt cruiser, and cant go boost right away, how much will the drop in compression with srt rods and pistons hurt the na performance?

Post by **racer12306** » Tue Mar 29, 2011 6:30 pm

considering an n/a 2.4 puts out 150hp and you are dropping the compression over half a point, so it's going to hurt it.

The NGC cars get away with it because of changes is programming and such, so unless you make other changes it, power will be down.

You could probably crank the timing to help overcome the loss without worrying about detonation since the compression will be low.

heydockyle · Post by **heydockyle** » Tue Mar 29, 2011 6:31 pm

Srt pistons in an n/a setup will run like ass.

Post by **occasional demons** » Tue Mar 29, 2011 10:20 pm

The only way ign. timing could be more aggressive would be with a stand alone controller.

Cam timing could be fudged a little to build more cylinder pressure, but you would still lose high end power.

nolaneon · Post by **nolaneon** » Wed Mar 30, 2011 8:11 am

dam thats what i thought, possibly ill just get a set of high compression pistons so itll run like hell lol then just build a low compression short block on the side until im ready for boost.

then go 8:1 fully forged with a huge turbo

esteinmaier · Post by **esteinmaier** » Wed Mar 30, 2011 9:23 am

That's what is in my DD, and even though it's not as slow as the stock motor, it's still pretty slow.

nolaneon · Post by **nolaneon** » Wed Mar 30, 2011 10:59 am

dam, id think it would give it a little more pep than that lol.. do you think itd be pretty nice paired with some cams?

Post by **occasional demons** » Wed Mar 30, 2011 12:11 pm

It really depends on which engine he was referring to. And whether it was compared to the stock 2.0 that came with the car.

I don't see an 8:1/huge turbo tuned by Erick being "slow."

esteinmaier · Post by **esteinmaier** » Wed Mar 30, 2011 12:50 pm

My DD doesn't have a turbo at all. It will some day, but I have more important things to work on right now.

DoubtedNeon · Post by **DoubtedNeon** » Wed Mar 30, 2011 1:10 pm

like my car. lol

esteinmaier · Post by **esteinmaier** » Wed Mar 30, 2011 1:16 pm

Yea. I still have Sam's car here almost done. I just don't have the time to abandon the kids and disappear in the garage for long enough to get it done. But I have to look at your car, a couple of my cars, sam's car, a local drifer's car, a car in south dakota, and maybe one in des moines. Then whatever cars are at Carlisle.

DoubtedNeon · Post by **DoubtedNeon** » Wed Mar 30, 2011 1:19 pm

lol, busy busy guy. i believe i have some vac problems or maybe some tune problems it developed? idk.

nolaneon · Post by **nolaneon** » Wed Mar 30, 2011 1:35 pm

wait is your dd a 2.0 or a 2.4?
and how much better would 10.5:1 run with like crower stg 2s?

esteinmaier · Post by **esteinmaier** » Wed Mar 30, 2011 1:46 pm

My DD is an SRTified 2.4 with no turbo on it yet. The race car is a 2.0 DOHC.

nolaneon · Post by **nolaneon** » Wed Mar 30, 2011 2:43 pm

dam thats whats up, i cant wait to start modding my neon, and im just so torn between which direction to go with the motor

cannot decide but probably going to end up being an srt swap