The "limit" of the stock motor

[anticubicle]

I understand this has been asked in several threads in the past however, I know that the "limit" people have thrown around for our stock block is 500HP but what about torque? What is considered the safety zone?

Last night I got tuned for the 150 shot and made 441 RWHP / 564 RWTQ @ 10.5 A/F, 9 degrees removed.

I understand that there is a risk in this but I'm worried that the 1st pass I make the thing is gonna pop

Should I tone it down to a 125 or is this within the "safety zone"?

 

[don_w]

Those stock rods may not like that torque... but that's just my opinion.

 

[anticubicle]

Those stock rods may not like that torque... but that's just my opinion.

That's what I was afraid of.

 

[kenneth]

150 shot is alot on stock internals.

 

[anticubicle]

Looks like I'm toning it down to the 125.

 

[Royski]

Looks like I'm toning it down to the 125.

I really wouldn't go over 125 shot and even at that, i'd make sure my tune was safe and had all the safety stuff to go with the setup.

 

[08gt4u]

personaly i wouldnt go above 400rwhp and 475 rwtq but thats just me cause of the amount of time i spend at the track.

 

[anticubicle]

personaly i wouldnt go above 400rwhp and 475 rwtq but thats just me cause of the amount of time i spend at the track.

I used to be at PBIR twice a week for months on end...def not the same anymore.

 

[stkjock]

IMHO anytime you go above 425-450 you must be prepared.....

 

[08gt4u]

I used to be at PBIR twice a week for months on end...def not the same anymore.

yeah i know you used to be there alot.if i was you ill go to 125 and then concentrate in making the car lighter and suspention bro.itll suck to go out to the track once or twice and blow a window on the block because of 25 hp.

 

[anticubicle]

yeah i know you used to be there alot.if i was you ill go to 125 and then concentrate in making the car lighter and suspention bro.itll suck to go out to the track once or twice and blow a window on the block because of 25 hp.

Yep. That's the plan, dropping it down to 125.

 

[antonio1988]

Yep. That's the plan, dropping it down to 125.

good move joe, better safe than sorry
http://www.hurricaneperformance.com/

 

[US-1]

IMHO anytime you go above 425-450 you must be prepared.....

Anytime you add a power adder PERIOD......you must be prepared.

 

[Tom]

Ive run 500 plus on my stock motor for a long ass time!!! Some hold and some dont. Just be ready for that to come. And it will even on a 125

 

[foolio2k4]

Anytime you add a power adder PERIOD......you must be prepared.

yes. I havent heard of an NA blowing their motor. Even with bolt ons.

Power adders may last.....but it will go eventually.

 

[Vapour Trails]

It should be mentioned that whp isn't really a good way to talk about the limits of an engine. Funny how everyone goes on about the importance of torque then all discussions of engine limitations default to whp, which is not a measure of force at all.

With 564 lbs-ft of torque I would be worried. That's a shitload of cylinder pressure to achieve that number, and cylinder pressure is what is going to fold the rod like a toothpick. The block is not the issue.

 

[blk281gt]

125 shot....shit happens i guess, lol!

 

[Vashthe3rd]

HP Is a function of torque vs. time
Torque is the force applied around the turning point, the time is the revs.
This is an over-simplification, but basically what needs to be known since people keep talking about whp limitations.
And again, it's all in the tune, and with a 10.5 I'd say you're doing alright but toning down to a 125 or even 100 shot wouldn't hurt incase you don't want to do any re-building right away.

Look up a guy named MikeysGT. He's running a 100 shot( he may be up to 125 now, dunno) but he's making gobs of torque, enough to run mid 11's or better on slicks with a few suspension mods.

My motto: Start low, aim high. It's cool to have an 11 second car, but how cool is it if it was only an 11 second car for one pass before it blew up?

 

[LASO]

Anytime you add a power adder PERIOD......you must be prepared.

Unfortunately not many seem to truely understand that till it's too late.

 

[blk281gt]

Unfortunately not many seem to truely understand that till it's too late.

well said