Need help (L92) wrist pin questions
02-02-2019, 09:00 PM
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Staging Lane
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Need help (L92) wrist pin questions Long story short, bought an l92 motor minus intake for 1600 bucks. Thought it was a good deal so I hopped on it, it has cylinder damage so I took it to the machine shop. Machinist said he can get me aftermarket stock style pistons to fit the rods for about 350 with rings if we go .020 over. Unfortanutely I read it looks like going .020 over will take the sleeves down excessively? He said it will clean up with a home but will probably be .002 big and will more than likely get some piston slap. He cant get any other pistons besides the .020. I cant find ANY damn pistons to fit the stock rods (.05, .010, .015). Different wrist pin combinations with aftermarket pistons is making my life unpleasant. Anybody have advice? besides buying new rods. Mine are perfect.
02-02-2019, 09:51 PM
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ModSquad
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I googled 4.070” ls3 pistons, and this popped up first...
There were many more from other vendors as well.
https://www.texas-speed.com/p-6252-m...ength-4cc.aspx
There were many more from other vendors as well.
https://www.texas-speed.com/p-6252-m...ength-4cc.aspx
02-02-2019, 09:57 PM
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Thanks brotha. Trust me I did ALOT of research on pistons, that is a .945 wrist pin setup, stock l92 rods are a .9431. Is that the same? They rounded down rather than up....scares me! Lol.
02-02-2019, 10:02 PM
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ModSquad
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Your machinist might have to hone the little end. There’s been this discussion on here many times. Some piston sets come with the correct wrist pin for gen4 rods, and some have to have the small end honed. I purchased a Mahle set just like this for an LS2 build up, and the wrist pins fit my gen4 rods perfect. I think they only have to hone like .002”
02-02-2019, 11:03 PM
#5
Nearly same situation for me. I went the 0.020” (0.5mm) over route to save $, as the slight over pistons were at least $200 more or greater. Mine were the same cost you indicated. I’m doing a stock LS3 build including cam. Have found many postings to indicate as long as not boosting it should be fine. I can measure and post my sleeve thickness as measured at the deck surface on Monday if you wish. I had 2 sleeves replaced. The machine shop has done a bunch of them, and said it will be fine. I trust their take on it, but would be interested to hear other real world experiences regarding it as well.