crossbredfoxbody

I have a l33 5.3 Im putting in a mustang, It has new gm flat top cast pistons stock rods with arp bolts stock crank, Head studs with cometic gaskets. Its a drag racing only car and i'm wanting to spray it 250 for the coming up season. I was wondering has anyone had any luck spraying that much. Im going carbureted spraying 150 out of the hole and another 100 when I hit second gear. I also have a nitrous cam xr288 236/242 590/595@50 112 lsa

406malibu

There's people spraying a lot on stock bottom ends if the tune is perfect and using really good gas. I've seen one guy on here spraying a 300 shot on a stock bottom end with perfect tune and race gas, but he's more of the exception rather than the rule. I'd say a 150 would be a "safe" shot with a good tune. Check out the nitrous oxide section of the forums.

crossbredfoxbody

I'm running 110 octane fuel, and I know how to tune n20 perfectly just wondering if anyone has had any luck on stock parts.

NSSANE02

iTrader: (14)

250 is a lot on the stock pistons. It may last a little while with a perfect tune but if you're planning to spray that much very often I would at least put some pistons in. There's a bunch of people spraying 100-150 with good results but 250 is pushing it.

RacerXLs1

iTrader: (14)

I would say the most is 175. Like said above I would invest in a set of decent pistons.

unit213

IMO, I wouldn't spray more than a 100shot on a stock LS1. Your ring lands will thank you. Will the motor hold together while spraying a 150-200 shot? Yep. How long though
is the question.

I sprayed a few hundred bottles (100shot) through my stock LS1.

01ssreda4

iTrader: (96)

What happened to it? still running after the 100s of bottles or did it let go?

99corvette

iTrader: (12)

Crank and rods are forged to an extent from factory. the pistons are the weak points in this cars

unit213

It was still running like a champ. LS1's are pretty tough.
I would bet that the ring lands had seen better days though.

Benjamin Russick

iTrader: (1)

Yep. The ring-lands (especially #8) are the weak link. Depending on how the piston cracks, you could lunch your engine.

Having said that, I sprayed a stock-bottom with a 100shot for almost 4 years. I eventually pushed a head-gasket, but the engine looked brand-new when torn down. Threw in a forged 382 anyway and sprayed it with a 150shot. That car was stupid for a street-driven vehicle...

99corvette

iTrader: (12)

I sprayed the **** out of my out car, 125 shot stock botton end with 150k miles. Never had a problem