That's the key.

Fwiw - We had an Evo8 w/ stock block and 35r put down over 530 on our MD only to have a rod bolt we suspect let loose at the top of a dyno pull

We also just had another Evo8 w/ stock block and 6262 put down over 525 as well but he decided to have us upgrade the rod bolts to arp stuff just in case

For sake of diff dynos our cars at 500 hp trap into the 135ish range

 

With those larger turbos you may have more HP but your TQ levels are going to be much lower. You should be able to run a 550hp 35R with 400 lbs of tq all day as long as your not taking the car above 7.5k on stock rod bolts. I think that a decked out stock turbo with high tq numbers will blow rods quicker than a 35R or 37R with slower spool and lower tq number. IMO

 

Lots of great speculation ....Too bad nobody has a material specification / design specification from Mitsu....

 

What do you mean? There is a package going to a materials lab right now to have it checked. FP has already done some material analysis WAY back but I wanted some more current and accessible information.

For the record I am making 575whp at 29psi, 400 ft lbs. on 92 octane fuel. The stock bottom end in my car has been run at 400-425 ft lbs for 47k miles. The tune is what will break the motor, that and the unexpected part failure of course, but the tune is the majority of the failure cause.

 

What I meant Aaron is that to the best of my knowledge nobody in the post has data on how much force certain parts can withstand...Where are you sending parts to be analyzed ?

 

I am sorry, I understand now. The data has been floating around in bits and pieces for awhile. You mean the actual tensile of the rod and rod bolts then? They will be going to PACCAR to be tested, R/Ternie and I have decided that the need to know is important since I have been able to push my engine so far we want to know what the actual torque and rpm value is going to be.

 

Please keep us posted John...!

 

Well put my friend it's diffinitly in the tune....

 

NO way you put those numbers down....POst your sheet to prove it

 

Awesome! I had no idea Paccar did outside component testing....I think this will be a great contribution to the community...