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Forum namePerformance/Engine
Topic subjectCOMPRESSION NUMBERS AND LEAK DOWN HELP!!!
Topic URLhttps://forums.2gnt.com/dcboard.php?az=show_topic&forum=i5&topic_id=61750
61750, COMPRESSION NUMBERS AND LEAK DOWN HELP!!!
Posted by Collente, Oct-18-03 08:17 AM
Cold numbers 150 60 150 160

hot numbers 179 60 179 180.

I did a leak down test on #2 and it went up to 90. Piston ring or valve? I did the leak down twice with the same results.

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Nick
97RS

turbo8u> shut your SUCK
ZAO684: NIPPLE warning...maybe>?
61752, RE: COMPRESSION NUMBERS AND LEAK DOWN HELP!!!
Posted by Collente, Oct-18-03 09:10 AM
Oh, btw I did the compression test after I was getting wierd idle after shooting a 50 shot of nx.


Nick
97RS

turbo8u> shut your SUCK
ZAO684: NIPPLE warning...maybe>?
61754, RE: COMPRESSION NUMBERS AND LEAK DOWN HELP!!!
Posted by grain, Oct-18-03 09:33 AM
piston ring lands? cracked piston? ick.. time to go forged }(
61762, RE: COMPRESSION NUMBERS AND LEAK DOWN HELP!!!
Posted by Dave_FL, Oct-18-03 12:58 PM
I'll bet $100 you have a cracked ring land. It is the first thing to fail on the stock pistons.
61764, RE: COMPRESSION NUMBERS AND LEAK DOWN HELP!!!
Posted by XtremeRS, Oct-18-03 01:07 PM
Yep, i bet you ran too lean with the nitro, got some detonation, and cracked the piston ring lands on that piston..A cheap fix would be to pull the head, and the oil pan, and find a piston with rings and slap it in there..I did that when i blew my engine the first time..worked really well for the time being..I'm sure lots of guys on here have good, used stock pistons with rings...It will get you by until you can rebuild..if thats what you want to do..
61765, RE: COMPRESSION NUMBERS AND LEAK DOWN HELP!!!
Posted by EclipseRST, Oct-18-03 02:59 PM
Collente aren't you turbo dude!? What're you doing shooting nitrous on a stock motor with a turbo?
61766, RE: COMPRESSION NUMBERS AND LEAK DOWN HELP!!!
Posted by tim97rs, Oct-18-03 03:06 PM
Welcome to the club, bro!!:thumbsup
61794, RE: COMPRESSION NUMBERS AND LEAK DOWN HELP!!!
Posted by Collente, Oct-19-03 09:03 AM
No, Im not turbo. I sold the kit to get some money for school. Well I wanted some power so I was able to find a steal on a nx kit. Lot of good that did me :rolleyes If anything I think I was to rich. I shot a 35 fine then put in the 50 a It would shoot then it would bog a little like it was to rich. Airfuel was pegged blue. I just have no idea. Tim you had a NX kit what jets did you use for your 50? What they reccomended?

Thanks guys, I will be rebuilding this winter.


Nick
97RS

turbo8u> shut your SUCK
ZAO684: NIPPLE warning...maybe>?
61803, RE: COMPRESSION NUMBERS AND LEAK DOWN HELP!!!
Posted by ForceFed, Oct-19-03 11:33 AM
I suggest reserving some time and get a used piston real quick for the mean time and then get yourself a set of JE's w/ a thicker ring lands but then I know how hard it will be since your in school. But hey, Nitrous is also considred liquid turbo!!!:cheers
61807, RE: COMPRESSION NUMBERS AND LEAK DOWN HELP!!!
Posted by DarkOne, Oct-19-03 01:21 PM
You did not do a leakdown test. you did a wet compression test. A leakdown is completely different..

However, you cracked a piston. Sorry.
61810, RE: COMPRESSION NUMBERS AND LEAK DOWN HELP!!!
Posted by Collente, Oct-19-03 02:31 PM
Originally posted by DarkOne
You did not do a leakdown test. you did a wet compression test. A leakdown is completely different.. However, you cracked a piston. Sorry.

Thx for clearin that up :thumbsup. Hey Tim, I have a bunch of questions for you if you get a chance check your mail. Thanks!

Nick
97RS

turbo8u> shut your SUCK
ZAO684: NIPPLE warning...maybe>?