Hi Guys,

I'm in the process of fitting power ent twin kit right now and I kinda wonder if the Nismo exhaust will flow enough gas for 12-14psi? It worked fine for me previously when I had my hks sc at 6psi. Reason I wanna keep is because it looks pretty subtle and I like the sound of it. Turbo gurus please advise.

 

anyone knows?? I've "searched". Relavant topic discussed with no conclusion.

 

I wouldnt run Nismo on 12-14psi TT kit. If ur already spending the money on more power why not spend a thousand more(well less if u sell ur Nismo) and get a better flowing exhaust for TT

 

ur not gonna know till u dyno it if it is being restrictive. Asking here is not gonna help you most likely unless someone with the same setup has tried it or doing it..my bet is that it would be fine but i do agree there would be others to flow better, but i do say it would work just fine..

 

I did some reading about the PE kit and based on alot of comments, its only good for 400whp (although some said 500whp) with those petite turbos. I'm not really bothered about getting anything more than 420whp because the reason I choose this kit is mainly for response. Anyone here uses 3" Y confiq system for their singles or twins? Please advise.

2004Black350Z: I agree with you. My thing is not really about cost savings. As mentioned, I'm planning to keep it look and sound the same if not softer.

tylexfire: Thanks for the reply. Are you using Nismo as well? Do you find signs of restriction for your SC setup?

 

I would say a single 3" would become restrictive after 450Whp. Now that being said your looking to run 12-14psi.

Do you have built block? At 12-14psi you going to exceed your stock block capability on a DE. A normal safe limit on a stock De block is 400Whp. Now there are some folks that run more then 400whp on there stack block, but it just a matter of time when all the conditions are correct and BOOM.
I am sure you have read through the Forced Induction for Noobs thread

 

I used my nismo for my vortech setup at 11psi and made 415.. it wasnt restrictive..but then again.. superchargers are different than turbos.. I know a few people who use the nismo on sinlge turbo but no more than 380-400whp though..

 

Yes. I have a built block with 8.5:1CR, rods, bearing, etc. Better be safe than sorry

 

Good deal.. Ok so at 12-14psi on a built block I would be looking for a true dual.

 

Guess I will find out in 2 weeks. In terms of true dual setup. I believe alot of the members here runs dual 3". Does dual 2.5" really robs that much of power potential? Once again, my turbos are small. From a rough view, it looked like the size of td04 mitsu's. So what worked for them might not work for me.

 

Dual 2.5" exhaust would be perfect for your power goals.

 

Great!! At least I know what to get incase my Nismo plan fail.

 

Something I have learned recently:

If you have the wastegate dump to atmosphere, you will be fine. If it is being recirculated back to the down pipe, you may want to look for a "good' flowing exhaust system. So, in yuour case (assuming you have the dual 2.5") if the w/g is dumped you are fine if not....you may be pushing it.

 

Its something really worth looking into. But the PE kit comes with actuator. I can go 2 options. Either I weld a wastegate bunk on the manifold or I'll fabricate the d/pipe to dump internal wastegate gas to atmosphere. In that case I might even just utilise the nismo system that I have.

The PE actuator can be adjusted. Does anyone knows what is the maximum boost the standard spring would hold?

 

yes i run a nismo exhaust on my supercharger setup, i have test pipes and it flows just fine..i made 420whp on a dynojet so ur guess is as good as mine..i do say u will be fine with the amount of power u will be getting but guess well see...as far as keeping the nismo to keep ur exhaust sound that is not gonna happen..no matter what exhaust u are gonna run it is gonna sound completely different because of the turbo kit...turbo car sound completely different than a n/a or supercharged car

 

my old setup i ran a nismo with greddy tt's 14psi and made 460whp, 445wtq

 

is this with the wg vented to atmosphere?

 

i had a PE kit before with a 14psi my car did 477whp @14 or 15psi on 91 tuned by GTM and 503whp @16 -17 psi (no meth) mixed octane with greddy exhaust 2.75 true dual and 3" aps test pipes. note that was on just built short block no head work or cams

so i say it would be restrictive exhaust.

 

std actuator springs should be good for about 15PSI I believe.

 

My car with built engine and PE kit is getting tuned on a Haltech at the end of this month, I have a 2.5" TD HKS exhaust, std actuator springs and no headwork or cams either. Really looking forward to see what numbers I'm going to get at the hubs!

Exhaust wise, I think it's not just about restricting flowing gases, but with a Y pipe type ona boosted car you have to really think about the extra heat produced by that setup vs the true dual.