How much nitrous can a forged - stock cubed - iron block handle???
07-13-2012, 06:55 AM
#62
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Really? I am making right at 600rwhp with a 150shot, 402ci LS2, th350 with PTC 8" 4000rpm converter and a strange 12bolt rearend.. It only made 455rwhp and 410lbs torqe on a dynojet ( This is the weird part.. The car made 553rwhp and 510lbs torque on another Mustang dyno) on the motor with this setup but runs mid 10's in the heat @126-128mph and low 10's in good air @128-130mph on motor.. I have no N2O numbers yet because of all the rain we have been getting but I am figuring with the 150 shot it should be somewhere around 9.80-9.90's @ 133-136 in the heat and 9.50-9.70's in good air.. @ 135-140mph. I may be off on my #'s a little but everyone I am talking to is saying I should pickup 8-10mph on the 150 shot.. Sorry for the thread hi-jack but how much N2O can an LS2 block take.. I have a scat forged crank and forged H-beam rods with ARP 2000 rod bolts and the mains are studded. I have ARP head bolts and forged Autotech Pistons with Total seal rings with the Cromoly top ring. How much can I safely spray on this motor? Again sorry for the thread hi-jack guys and thanks for all the help..
Last edited by odarabla; 07-13-2012 at 08:21 AM.
07-14-2012, 12:16 PM
#64
I think you will reach diminishing returns on the N20 after 300-350rwhp before the block sees any sort of stress.
Fireball ran his LS2 block to 1600hp and 7.90's@182.
His bottom end was a little more exotic than yours but he said the mains showed little sign of cap walking and the block was structurally sound still after all that.
I think it will take another 200hp of jet if not more for you to see 800rwhp.
Remember once you pass a certain jet size it isn't just 50hp worth of jet for 50rwhp unless you're using -8 line from the bottle to the solenoid and -6 from the noid to the plate, spray bar or fogger depending on what you're using. That's about the only way you will see that amount of nitrous actually make it to the cylinder and even then there is only so much volume a 402 cubic inch small block can ingest even with the biggest baddest heads available.
Fireball ran his LS2 block to 1600hp and 7.90's@182.
His bottom end was a little more exotic than yours but he said the mains showed little sign of cap walking and the block was structurally sound still after all that.
I think it will take another 200hp of jet if not more for you to see 800rwhp.
Remember once you pass a certain jet size it isn't just 50hp worth of jet for 50rwhp unless you're using -8 line from the bottle to the solenoid and -6 from the noid to the plate, spray bar or fogger depending on what you're using. That's about the only way you will see that amount of nitrous actually make it to the cylinder and even then there is only so much volume a 402 cubic inch small block can ingest even with the biggest baddest heads available.
