Hey guy check : Masive knock - YouTube
And cyl number 3 plug is burning oil like crazy the plug it black and wet.. Is this a ring issue?
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11-17-2011
Hey guy check : Masive knock - YouTube
And cyl number 3 plug is burning oil like crazy the plug it black and wet.. Is this a ring issue?
11-17-2011
Kinda sounds like a valve train noise. Which you could get those symptoms from say a valve opening or not.
Which uh..piston was the one that you replaced with an L36 rod/piston?
11-17-2011
The GT trans eh isn't worthless. You could easily have 3.29 gear ratio.
11-17-2011
Lol umm yea cyl 3 has a gtp conecting rod and piston. Lol its a gtp bottom end wit 5 l36 pistons in it lol
11-17-2011
I would stop messing with the frankensteined motor and get a complete L36 bottom end for a couple hundred bucks and swap it in there. What was your reasoning for using one GTP piston and rod?
11-17-2011
Well this is what i found!Gtp chipped piston - YouTube
You will not belive that every 2000km a piston chips in this car lol
11-17-2011
Reason was for that i couldnt find a low milage gt engine with a piston for 20 bucks each lol
11-17-2011
you need a whole bottom end, hows the head look? any damage to it?
and a used engine with 130,000 + miles on it aint that bad in the 3800 world. your going to freshen it all up anyways like every gasket you can while its out. cheap insurance.
11-17-2011
Don't mean to be that guy...
but I called it.
Using different compression pistons, especially with smaller pulleys and no tune isn't going to do anything good for you either.
I tried explaining it to you as well, and I'm with Joey...go buy a COMPLETE short block. LOW compression. STOCK supercharger pulley. I'm sure if you refreshed the rebuild with all new gaskets...it would last thousands upon thousands of miles.
11-17-2011
It has nothing to do with diferent pistons . Their the same. But anyways i took apart that engine i had on te ground and its all scrap soo yep great.
11-17-2011
Originally Posted by guimond47
Seriously?? It has nothing to do with different pistons??? Please remove short block, use it as a coffee table, and part the rest out.Lol umm yea cyl 3 has a gtp connecting rod and piston. Lol its a gtp bottom end wit 5 l36 pistons in it lol
Of COURSE it has EVERYTHING to do with putting the WRONG piston in!!
11-18-2011
Dude they all have same compression and pistons look all eexacly the same
11-18-2011
They are FAR from the same.
L36 pistons have 9.4:1 compression
L67 pistons have 8.5:1 compression
The crank is balanced for ALL SIX rods/pistons to be the same weight/dimensions.
You have FIVE of them making 9.4:1 and ONE making 8.5:1...on what...a stock GTP tune? All those cylinder temps...Lolololz.
Trolled?
11-18-2011
Just from common sense, wouldn't the NA piston have a higher compression ratio anyway? Most forced induction engines have very low NA compression ratios as they get compression from the induction systems.
The other thing I would be worried about, aside from the difference in compression, is the difference in weight. I would recommend to anyone who does this sort of thing, to weigh each piston, rod, wristpin etc so you have a balanced rotating assy.
I agree with the others - get a used shortblock.
11-18-2011
considering the L67 pistons and rods are just physically COMPLETELY different.... so different hellen keller would have no problems telling you which one was a L67 piston/rod.
The L36 rods are also much longer, so if you were somehow able to get a piston pin into a L36 rod you would have like 12-1 compression.
11-18-2011
haha frankenstien as ****
11-19-2011
oops lol oh well . now i have my 3 front cyls gtp and my rears are gt lmfao..... well see how it runs boys lol ill let youse know ! all i gotta do now is to hoook up the harness and away we go. what makes em hare more compression ratio ? the connecting rod or the piston itself.
11-19-2011
DO not even bother to finish this engine, remove it now and install an engine that is know to be in good shape. Your just making more work for yourself, and throwing money out the window by "frankenstiening" engines.
Also, put the stock superhcharger pulley back on.
11-19-2011
What can possibly go wrong tho lol stupid question but like i been running two different pistons for a while and they always ran like a normal engine, never had ruff idle or anything soo please explain wat can happend thanks
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