Mahle Pistons for Blower ?
Thread Starter
Staging Lane
Joined: Jan 2010
Posts: 87
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Mahle Pistons for Blower ? Hey guys,
First time on the site and I would really like to get some feedback on Mahle Pistons.
I got a LQ9 Stroker Motor built with D1SC Pro Charger 8.8.1 Compression, Callies Crank, Scat Rods, Mahle Pistons with Hell Fire Rings, Custom Bullet Blower Cam, Dart Heads, and Big Stuff 3 Fuel Management. That is some info on my engine.
My builder purchased Mahle Pistons in beginning of 2007, I had the car completed in September of 2009. I put about 500 miles on the engine. Engine is putting out 11 PSI of boost. Max boost that I had the car at was 6 PSI.
The problem that I had was that the Mahle Pistons land ring broke. It was a
.250'' top ring down 4032 alloy. These pistons were chosen by builder because he was told by Mahle that it would handle 15 PSI...which it obviously did not even handle 6 PSI.
Now Mahle will replace them with their new .300" top ring down 2618 alloy pistons.
Does anybody have any feedback on these new pistons from Mahle or any other info that can be useful to me.
Thanks
First time on the site and I would really like to get some feedback on Mahle Pistons.
I got a LQ9 Stroker Motor built with D1SC Pro Charger 8.8.1 Compression, Callies Crank, Scat Rods, Mahle Pistons with Hell Fire Rings, Custom Bullet Blower Cam, Dart Heads, and Big Stuff 3 Fuel Management. That is some info on my engine.
My builder purchased Mahle Pistons in beginning of 2007, I had the car completed in September of 2009. I put about 500 miles on the engine. Engine is putting out 11 PSI of boost. Max boost that I had the car at was 6 PSI.
The problem that I had was that the Mahle Pistons land ring broke. It was a
.250'' top ring down 4032 alloy. These pistons were chosen by builder because he was told by Mahle that it would handle 15 PSI...which it obviously did not even handle 6 PSI.
Now Mahle will replace them with their new .300" top ring down 2618 alloy pistons.
Does anybody have any feedback on these new pistons from Mahle or any other info that can be useful to me.
Thanks
8 Second Club
Joined: Dec 2007
Posts: 25
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From: smyrna del
I had mahle pistons in my last motor 9:5:1 comp stock ls7 block bore out. Stock crank balenced ,stock heads ,callie rods. Ysi 16 psi. Made 965 thruoghmy6 speed,8 somthing with 4l80e good for 8.81 1.32 @ 154 and the pistons where never a problem if that helps
Last edited by Ricky Bobby; Feb 1, 2010 at 08:04 PM.
Thread Starter
Staging Lane
Joined: Jan 2010
Posts: 87
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Thanks, Do you know if you had 4032 alloy or 2618 alloy?
i ran 4032 mahle pistons with boost and burnt a hole in 3 of them. but really that was all thanks to LMR for leaving my timing at 27 degrees on a motor i told them was 10:5:1 CR. that was only at 6 psi. My new pistons in the ls3 are the x series wiseco 2618 pistons. really a 2618 piston will hold better to boost than a 4032 piston
Thread Starter
Staging Lane
Joined: Jan 2010
Posts: 87
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i ran 4032 mahle pistons with boost and burnt a hole in 3 of them. but really that was all thanks to LMR for leaving my timing at 27 degrees on a motor i told them was 10:5:1 CR. that was only at 6 psi. My new pistons in the ls3 are the x series wiseco 2618 pistons. really a 2618 piston will hold better to boost than a 4032 piston
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I havent got the 418 back in the car but final CR will be about 8:9 or 9:0. I had to go with a -32cc piston to get me there because my AFR heads were milled to 62cc and with a 4 inch stroke i needed a huge one lol. I will prob stay around 10 or 12 psi for now even though a 2618 piston will hold lots more. Almost every boost car with forged pistons making huge power will be 2618. a 4032 piston is low expansion and cant hold the heat caused by the more compression from boost therefore causing it to melt away. Though i believe a 4032 will be alright for low boost. I think mine would have been fine except LMR left it with 27 degrees timing. I was going to get the mahle 2618 pistons but they are so new that the warehouse told me it would be a few weeks and i didnt want to wait. If you are putting in 2618 pistons you should have no worries man
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Launching!
Joined: Sep 2009
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From: greensboro, nc
I would say its in the tune up. your pistons look a little dark for only having 500 miles on them and your bearing looks like it has taken some abuse. Is Mahle willing to swap out your pistons?
As stated above, obvious detonation issues looking at bearing wear and piston top. FWIW, if the tune is good, either alloy will do the deed. 2618 is just more forgiving than 4032 albeit a bit heavier. I've used Mahle in many different applications over the years, for a boosted app, I tend to steer customers toward Diamond 2618's but if someone is on a tight budget, I will run the Mahles as long as I have control of the tune.
Shane
Shane
Thread Starter
Staging Lane
Joined: Jan 2010
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