:thumb: thats good! always nice when u dont have to pulll the motor
u must be around 900 to 1000hp or more AJ? and do you ever do comp tests on them?
either way good for you! you have to have bullfrog luck for that
forged pistons?
- Thread starter 02bigstrokin
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u must be around 900 to 1000hp or more AJ? and do you ever do comp tests on them?
either way good for you! you have to have bullfrog luck for that
either way good for you! you have to have bullfrog luck for that
come on.. I cant help I got a freak motor from the factory
An Engineer got paid big bucks to design lbz pistons too, i dont mean to rain on his parade but come on. I know of a very high hp truck, that cut a shit load out of his lbz pistons and made them last 3 years... When everybody else had trouble with stock ones at 600 hp. I understand the whole removing material thing, yes it will weaken them, people arent removing material cause they think its fun, less compression means less cylinder pressure, it obviously works in some cases.
Mistakes were made with some of the lbz pistons. I'm of the belief that those mistakes were made during casting and are material flaws more than design flaws.
I know they aren't cutting them for fun, Rob. Cut me a little slack here.
less CP also means less torque.
:thumb: thats good! always nice when u dont have to pulll the motor
u must be around 900 to 1000hp or more AJ? and do you ever do comp tests on them?
either way good for you! you have to have bullfrog luck for that
Don't know on HP, I'm sure its a lot less then a lot of you guy's running big twins. I ran 98.6 MPH in the 1/8th and the end of this season. The scale called my truck 6600lbs with me in it. Not sure I believe its that heavy but until I get it on another scale in race form its all I have to go on. But either way it gives you an idea.
Never done a compression check, still starts and runs fine, good balance rates, etc.
I definetely feel like luck has been on my side!
Hopefully I can find time to tear it down this winter and go through it. I dont want to push my luck to hard....
I have 3 years on my motor, LB7 cut pistons that are not coated, rods and headstuds as my only motor mods. Have in the neghborhood of 300 passes on it lots of those above 125 mph ( have been as high as 131mph) at 7200lbs. don't know if it's 1000hp or not. I do drive my truck as a daily driver.
My SoCal cut and coated lasted me a year and about 12,000 miles of pure abuse. 10,000 miles of that was fuel only on the S475 making 820+, that last 2,000 was with the S480 and spray. I typically drove around on tunes that were over 800 rwhp and was not at all easy on the truck, it took alot of customers for spirited rides and I play even harder when I don't have to worry about cleaning fluids off the passenger seat. I probably had 15-20 passes and only a few hooks with the S475. With the S480 and nitrous I gave it hell at the Diesel Power Challenge - ran the same nitrous and tuning pulling that trailer as I did on my 10 second passes. After the Challenge I made 3 more passes at the track and it let go on the 3rd pass. All 8 of my pistons were cracked, it was a race to see which could crack through first. No signs of melting or anything, just the cracks - the coating seemed to be doing it's job.
The current plan is to go back with Arias, but I am going to look into some other manufacturers as well - including Mahle. You need to also remember that just because aftermarket pistons are made by the same manufacturer doesn't mean they are made the same; just like cams, a few companies make most cams but they are spec'd and relabeled by many other companies. Companies like Mahle will make you pistons however you want - you could call them up and tell them you want pistons made completely of recycled Coke cans and they would probably do it for the right price. I would like to see a set of 2000 series forged pistons with the hard anodized ring like what SoCal's 4000 series Mahles have, hopefully you could use a tougher ring without beating out the lands. I plan to talk to Buck Spruill about it some, since he has been running a big single with TONS of spray and now the BIG twin setup - I'm pretty sure his are Mahle forged pistons, but not SoCal specs. From my research the 4000 series forged would be better for the street, but not take as much abuse. I'm willing to change rings every few years on 2000 series forged rather than pistons and over boring until I run out of block every time I crack one.
The current plan is to go back with Arias, but I am going to look into some other manufacturers as well - including Mahle. You need to also remember that just because aftermarket pistons are made by the same manufacturer doesn't mean they are made the same; just like cams, a few companies make most cams but they are spec'd and relabeled by many other companies. Companies like Mahle will make you pistons however you want - you could call them up and tell them you want pistons made completely of recycled Coke cans and they would probably do it for the right price. I would like to see a set of 2000 series forged pistons with the hard anodized ring like what SoCal's 4000 series Mahles have, hopefully you could use a tougher ring without beating out the lands. I plan to talk to Buck Spruill about it some, since he has been running a big single with TONS of spray and now the BIG twin setup - I'm pretty sure his are Mahle forged pistons, but not SoCal specs. From my research the 4000 series forged would be better for the street, but not take as much abuse. I'm willing to change rings every few years on 2000 series forged rather than pistons and over boring until I run out of block every time I crack one.
Mistakes were made with some of the lbz pistons. I'm of the belief that those mistakes were made during casting and are material flaws more than design flaws.
I know they aren't cutting them for fun, Rob. Cut me a little slack here.
Sorry, I wasnt meaning that in seriousness, if lowering compression hurts power that bad, then its a good thing you have to lower cp quite a bit on the old 12valves, or they would really be kicking the dmax's ass at everything.
So should I use these 40k mile stockers for 700-750 or not
I think you will be just fine. If everything is done right you can be very reliable with the lb7 pistons. I have about 57k on mine and haven't had a problem yet and I h
ope that comment doesn't jinx me too.
They are spec'd by TTS, but are not made in house. IIRC they are made by Mahle.
I think you will be just fine. If everything is done right you can be very reliable with the lb7 pistons. I have about 57k on mine and haven't had a problem yet and I h
If by everything done right you mean keeping the power reasonable (>800-900 rwhp) then I agree they will be reliable.
I dont think reusing them would be an issue , but bores would need to be checked for roundness .
X2
I think that cut and coated pistons are reliable up to about 800 rwhp, after that they can and will last but not for extremely long. Any time you are building a motor it should be getting torque plate honed to get the bores round with the added stress of studs. I also recommend align boring the mains to true them up, with main studs it's pretty much required.