Rocky70304

iTrader: (4)

Alright, I think I have conceded to putting forged pistons in , I want a set of pistons for my 96 LT1, I want some that I will be able to press the pin in to the factory rods, with no modification, and that hopefully will be $30 or less apiece. Anyone got a part number or know which ones to use..

96lt1m6

iTrader: (31)

The least expensive will be the Speed-Pro L2256-F .030 35.99 ea
with the Lt1 head it would yeild 11.4 or a little more
they are a good piston and will handle some abuse!

96capricemgr

iTrader: (1)

Have you considered rebalancing in your costs?

Rocky70304

iTrader: (4)

11.4 is high, I really want to keep 10.8 or a little lower, because of gas prices... I didn't figure rebalancing, because I was going to just put pistons in without balancing...

93ls7z

iTrader: (2)

Speed Pro L2441F. I have not figured the compression ratio on it, but it is a dish piston that would take some abuse. I know a guy that has a set that has been used very little, I will try to call him. We were going to use them in an LT1 we were going to build for him, but I think he decided to go 383. Good choice going with the forged, you won't regret it. Also very smart going with stock compression or a little lower. We put dish in my wife's LT1 stock rebuild and the compression is 9.5:1 and it runs as good or better than it did before the build. I will do a little looking and find some more part #s for you if I can.

kenscivic

iTrader: (1)

you bought the wrong car

dhdenney

iTrader: (53)

11.4 on 93 octane is not bad. If you plan on running 89 or God forbid 87 then yeah it's too high. But performance and low CR don't go together.

96lt1m6

iTrader: (31)

the only way i would lower the comp ratio on an Lt1 is if i knew for sure BOOST was in the near future or i had a LARGE CI motor.

dhdenney

iTrader: (53)

You wouldn't have lower the CR on a large CI motor. You would however have to open up the CC or the piston dish volume to maintain a certain CR.

Schweet97Z

iTrader: (35)

seriously, 5-6 more bucks at the pump per fill up isnt bad and i would highly consider raising the compression as it has a huge factor on hp.....

Ray@Nitrous Outlet

I ran 12.2:1 in my 396 and 11.5:1 when it was heads/cam all on 93 octane pump gas.
Compression is your friend

96lt1m6

iTrader: (31)

i know i would not HAVE to lower the CR in a large ci motor,i was in the mindset of BOOST.

Compression makes power no matter how you get it!

Rocky70304

iTrader: (4)

I agree compression makes power, but the reason I don't want to go more compression the the stock 10.5:1, is because I can get away with 87 octane on that, trying to not have to bump up to 89, or the dreaded 93...

Schweet97Z

iTrader: (35)

87 octane Lets say .20 cents a gallon more for 93 over 87, times it buy 11 gallon, you get what? 2.20 cents extra for something that makes your car run better. U cant justify 2.20? ive never used 87 octane when the car had stock compression. Bump the compression, and stop worrying about gas, people over look the actual prices of good gas compared ****, and would rather have their cars run worse and save two bucks being cheap. Dont be cheap! lol

projekt70chevelle

iTrader: (4)

Rocky70304-"I agree compression makes power, but the reason I don't want to go more compression the the stock 10.5:1, is because I can get away with 87 octane on that, trying to not have to bump up to 89, or the dreaded 93..."


Hmmm... im a little confused. According to the sticker in the gas cap panel, we are supposed to run 93 (which i have run ever since i got my car). But i was also told that you want to run the lowest octane you can without detonation. Will running lower octane gas, even though detonation does not occur, cause a loss of power or poor running quality. And how do you know when detonation occurs??? Sorry for the sorta highjack but you brought it up and i was curious

Schweet97Z

iTrader: (35)

if you ever heard of the term "pinging" with bad gas, a knock sensor will pick that up and retard/advanse timing as needed creating powerloss. ive been told you can hear "pinging" (which i never have and probably couldnt due to my hearing loss) but im pretty sure you can connect auto tap and read detonation that way.

Ls1Bait

Yea I wouldnt mind building a 355 with stock crank and just forged pistons/rods, I would also have to bump the compression to 12:1

I picked up a used engine for 100 bucks a year ago, time to get it to the machine shop.

dhdenney

iTrader: (53)

Right, I just read you to say compression has to go down on big CI.

RedLT4Mike

iTrader: (4)

..................

1995ta383

i agree with schweet97z those are my thoughts exactly. Bump up the compression and balance it too. that is if u want it to last.