i have 100 at the pump, what power levels would you say are safe on a stock motor with greddy TT set up? what boost levels? I have been running at 9.4 lbs of boost for a while and that is around 420-425 i would assume since last time i dynoed it was set at 8psi and i was making around 415. so do i safely have more room to go using straight 100 pump?

 

higher octane may prevent detonation, but it will not stop your stock rods from buckling due to increased torque... so the safe answer is still 400 whp.

 

Exactly. You can make enough power on pump gas to bend stock rods - higher octane fuel, meth injection, nitrous, etc won't help that situation.

 

people have gotten 575+ on race fuel and the greddy kit, but honestly dont know the physics of how its safer. my guess is that the motor is under less boost and the rods although making the same power are essentially under less stress( 15lbs vs 18lbs) and are not as prone to detonation and run cooler. the rod failure is due to compression force, not sheering, from the torque. i always wondered if it was possible to do boost based on rpm, so essentially you could ease into the torque( linear like a sc) and get more hp up top. or maybey dump fuel and adjust timing to reduce torque earlier in the powerband. however this would only help getting higher hp on a dyno while doing a long pulland would fall apart on the streets and result in the destruction of the motor.And the fact that it is counter-intuative to streetable power and probably goes against the physics of turbos. lol just realized how useless this idea was

 

so the power of the explosion itself (not meaning detonation) is what is bending our rods?

 

+2......

 

running 100 octane i put like 20k on my car beating it HARD at 470ish dynojet RWHP 100% factory engine. tons of highway runs almost every night. A/F around 11:1 and average ignition timing. Some have blown up with that power... but i dont know if it was their tuning and inconsistent pump gas or if their motors werent as bad *** as mine. on tear down for build up, the engine showed no signs of excessive wear.

 

thats how i feel about mine, i beat the crap out of this thing and no problems ever, i also bought the car from a guy who drifted it all the time and was hard on it and nothing but smiles(i think she just really likes making me happy)

 

I have seen a stock motor run 520whp on leaded 110 race fuel at the track weekeng after weekend.On the same fukd up tune.
So what does that say?

 

yeah, i was told by a shop that my tune was waaay to aggressive and the motor would blow if i kept running that tune and that was about 7 months ago and still running on the same tune and no problems. but of course the people who tuned it said the tune is just fine.

 

We ran Eagletangreens stock rev-up engine at 12psi...around 450-460whp DynoDynamics....probably close to 500whp DynoJet. Ran great for a year, and he made dozens and dozens of 1/4 mile passes, and a bunch of track days. She never blew.....but when we disassembled, a few of the rods were slightly bowed.....it was only a matter of time.

More food for thought.

 

Nothing lasts forever and the stock rod will give first - that's been established. Metal fatigue is cumulative and increased stress will result in quicker failure. It's just a matter of time, but as pointed out, not all stock motors are the same and your time to failure could be very different than the next guy...

You gotta ask yourself, do you feel lucky? Well, do 'ya, **** (oops - sorry got carried away ).

 

well as soon as i can buy a built shortblock we will see what the insides look like