life starts at 10psi

 

The weak point of the VQ35DE motor is the rods. Speaking very generally, peak torque usually is what takes out the rods (assuming there is no detonation). The peak torque on this build looks to be around 420 ft lbs. This may be pushing the stock rods to their limit, but they may hold for a reasonable amount of time. Time will tell.

HP = (torque x rpm)/5252

With some of the other turbo kits (like the Greddy), the boost comes on early and starts to fall off. So, even though these kits may generate the same peak hp number, they are generating more torque and hp lower in the rpm range. That is where the 400 hp rule of thumb comes in. In other words, a Greddy TT kit producing 470 hp usually will be producing somewhere around 470 ft. lb. of torque at around 4k rpm. That will create more stress on the rods than the kit in this thread. On the upside, you get a strong kick in the pants, which is a lot of fun to drive. I actually enjoyed the Greddy kit quite a bit. But then, I had a built motor with rods designed to take the level of torque that I was producing.

For reference, below are the dynos from my tunes when I had the Greddy kit. As you can see in the second dyno, we were pulling back timing and adding fuel at 4200 rpm to pull back the peak torque.

 

Good point. I hadn't thought about that as being an issue. Perhaps it is. But, to me, it seems that any issues related to the ring lands would correlate to the amount of air/fuel being combusted in each combustion cycle, which would correlate to the amount of torque being produced. That said, I have never researched that particular issue, so take this post with a grain of salt.

 

I have had the JWT 700bb kit on my car since 08 and its been running 10psi from day one. I think we started at 450whp and are now up to 473whp with meth. I have had no issues with it, i take it drag racing as well as some spirited driving and everything has been holding together. Granted i have a long list of support mods to try and help it out.

Watching Sylvan pushing the limits on his makes me want to turn up my boost to get into the 500whp club. Maybe that will be next year.

 

so all things equal a single like a powerlab would/should be more forgiving than a small greddy twi setup for stock block applications?

 

Interesting....

 

LOL agreed ... Hopefully one day ill have some boost

 

I was thinkin about gettin this TT kit also (SFR) http://www.turbokits.com/g35_turbo_kits.html (Fourth One Down on Page), My only question is im trying to reach around the 500-550 HP range, does anyone know what else i would need other than the rods,? im new to FI so i just wanted to ask to make sure i don't get a blown motor, thanks

 

Crazy risky