Compression Test results, need advice

[GandorE]

A buddy of mine and did this Compression test on a KA24E tonight on the project 240SX/180SX....Ok, I ran the test on all four cylinders and got the following results. I am hoping someone can help me determine what the problem is and how critical it might be, I have 3 months to work on the car, so please keep that in mind (and access to many common power/air tools)

Test #1:C 1 = 157C 2 = 167C 3 = 97C 4 = 175

We then preceded to retest # 1 and #3 with adding some oil and got:Test #2C1 = 177C3 = 185

We also know that the gasket in the valve cover is rather chewed up looking, and we have an oil look from somewhere around near the oil filter. We think this might mean that the rings are going south.

Does anyone also know what the cost for replacement rings are, and while we are gonna possible have the engine apart we are wondering how much a thinner head gasket will raise compression, and in addition to this were wondering if it is possible to get 10:1 or 10.5:1 CR pistons built to stock specs???

Thanks,GandorE(I can drift my Mr2, how about you?)

[SSS]

Don't use a thinner gasket, either have material welded into the combustion chamber to reduce its volume and/or mill the head; IF you aren't going to put flat top pistons in.

[SSS]

Oh, and change your rings. Those results for C3 look iffy....

[DRIFTERx]

number three is dead and do a leakdown test

[GandorE]

do any of the companies that make pistons for the KA24E, make like 10:1 or 10.5:1 CR pistons that are OEM Spec (Do not require overbore) ???

Or, if we mill the head how far can we mill and how much does it raise the compression? Can someone maybe point me in the direction of the Numers for me to calculate this?

[JNM240]

This might help start you on the road to confusion:

http://www.holley.com/HiOctn/T...amber

[GandorE]

That is a decent start been there seen that....

But i mean like specs specific to the KA24E, and more so if its already been figured how much can the head be milled without making the Valves slap the Pistons

Also, anyone know how much i can expect to pay if i buy new gaskets and piston ringles and everything else i need to do a complete rehaul?

[TrunkMonkey]

But i mean like specs specific to the KA24E

192psi standard142psi minimum14psi difference limit between cylinders

and more so if its already been figured how much can the head be milled without making the Valves slap the Pistons

i've got the figures somewhere, but right now i'm too beat to dig them up. regardless, you'd be better off raising your compression with pistons.

Also, anyone know how much i can expect to pay if i buy new gaskets and piston ringles and everything else i need to do a complete rehaul?

shop around.

-demetrius

[S13Ka24e]

Drop in ka24e pistons with a 10.5 CR (stock has a 89mm bore)

http://raceeng.com/showItems.a...=RACE

$420 is a good price for forged pistons.