Ok guys, I'm building up a little 355 ci LT1 for my '96 Trans Am. Putting in forged rods and pistons, however, I'm debating whether to leave the cast crank in place, or to upgrade to a hardened nodular iron crank for a little extra $$$. I know i can't afford a forged crank so far, b/c this buildup has costed me a great deal more than I had anticipated. I'm planning on putting a 125 or 150 shot of nitrous, and wanted to know if anyone had ever had a problem breaking the stock lt1 crank under these circumstances. Any advice is welcomed. Thanks,

Brandon

 

I run a 150 shot on a all stock bottem end.. with a 105k on it so my vote is the stock crank is fine...what C/R are you aiming for?

 

Stock compression. Hearing what you run makes me feel much better about spraying a 150 shot on mine though.

 

you like them times?Just wait untill spring right now the car has drag springs getting liftbars for it and a 3000 stall fresh trans. and SFC..!sway bar too. then I will have to cut back on the N20 untill I get a cage...

 

I do like those times! I'll be anxious to see how mine runs. How many times have you run the thing? I think that 11.96's on nitrous w/ a stock bottom end is plenty of proof that the crank is not the weak link in my motor. Thanks.

 

it has had 1 10lb bottle ran with 50-100shots(playing)and 1 10lb with a 150 2 8th mile passes and 2 1/4 mile passes ..only problems I have had since the N20 has been trans related.. hit the rev limitter from 1-2shift on the 11.96 pass..and slugish shift into 3rd.. but just waiting on the stall to get here ..(tue?)

 

Anyone else had good luck spraying a 125 to 150 shot or bigger on a stock cast iron crank?

 

do a search in N20 tech there are few post now on a 355 setup...

 

Man I spray 150-175 on my stock bottom-end motor. How's 11.03 @ 125.53 mph spinning. Car should go easy 10.80's with traction. Don't sweat it. I know several people spraying 150+ on a stock bottom-end.