10isace

iTrader: (12)

I did a compression test today after I took my son to school (15 mile drive each way). Car fully warmed up. Battery is 3 months old. Cranked over 15 times. It came out to (cylinders 1-4):
100, 105, 110, 110
after putting some oil in the cylinder:
110, 105, 112, 110

Mods: GSC S2, Perrin Intake, ETS LICP, Perrin DP, MAP O2.
Mods waiting to put on: SpoolinUP COP, FB 70mm TB, IX Turbo, UICP, etc.

Is it rebuild time (110k miles)? Car seems to drive fine. I'm at 360 hp/tq on E85. That's with a massive boost leak at the TB shaft seals. I'm fixing that soon. I also noticed my coolant overflow was overflowing. Bled the cooling system and it seems ok, but keeping an eye on it. Head gasket? WTF is going on?

Also, I always thought when it came time to rebuild then I would have a motor built, but I DD and from what I've read, people with built motors are happy to get 30K miles out of theirs. That would last me a year and a half . I'd like to be at 450+ hp/tq. 2.3 and 2.4L sound good, but I'd like to get another 100K miles.

I plan to DD and maybe AutoX a little this summer. I'm looking for great driveability, low to mid range torque.

What do you all recommend?

Blue91lx

iTrader: (44)

There's no reason why a properly built "built" motor shouldn't last you. Yes, there is more stress on parts at a higher power level, however, if the clearances in your built motor are good you shouldn't have any problem making it last. I'll have a built 10:1 2.0L up for sale here in a few weeks as I'm changing setups

Good luck with whatever you choose!

10isace

iTrader: (12)

Thanks! I'm hoping this is true. I'd like to do a built motor built to last 100K. What setup are you going to? I here for DD 2.4 is the way to go.

Blue91lx

iTrader: (44)

Well, you heard correctly, as I'm going from my 2.0L/35r to a 2.4L/Stock Frame setup.

SDevo13

iTrader: (6)

I would definitely go 2.3rr/rpm (i.e. light weight rotating assembly) if you have a good core. If not go with a 2.4.

As far as longevity, it depends on a lot of things. Some motors last 30k miles at 800whp some last 5-10k. Depends on the driver, tune, mods, and a ton of other factors. Being that you aren't going buck wild, I think you would be more than fine.

TurboTravis

iTrader: (6)

I'd be willing to bet that the test was done incorrectly and/or the gauge is wrong.

10isace

iTrader: (12)

I was thinking maybe the gauge is bad. It's only a couple of years old and I did a half a dozen tests on other cars. The readings are very low. I would imagine I'd be losing oil or some driveability problems. I'll try another gauge tomorrow.

Murf

iTrader: (2)

8 or a 9. Change o ring on tester and lube it with a little oil before screwing it in.

10isace

iTrader: (12)

8

I'll try that. I've seen some gauges slowly leak to a lower indication after the final crank on the engine. I'm guessing that's what's going on here.

civicej8

iTrader: (8)

at least your numbers are consistent. do some hard runs and see if the overflow spits out some coolant. did your car ever overheat?

10isace

iTrader: (12)

Car never overheated, but while logging I noticed the coolant temp was higher than usual, 205 F after a WOT log. The overflow did overflow, but I have since put a new radiator cap on and it's not overflowing anymore.

From what I learned about this test is that even if the gauge is reading low, they are pretty close from cylinder to cylinder, means that's good.

tmaddox

iTrader: (3)

Stock 2005 Evo VIII, 67000 miles, at idle cylinder pressure is 110 psi in two cylinders, 108 in the other two. Runs fine. Hopefully that gives you another baseline. I thought 110 psi was normal?

10isace

iTrader: (12)

Cool! The car has been driving fine. I got most of the boost leaks taken care of. There is some in the valve cover, but I think it maybe some seals in the valve train.

evotuner04

iTrader: (45)

so what can you expect for miles from a 2.3 built motor/head with say 550whp/500tq and good driving not an a hole to the car

Pirana

iTrader: (43)

Plus, a compression test on an aluminum head should be done with the engine cold.