teknics

the single turbo's are more efficient, and efficiency = more power. those little twins are struggling to push 12psi so you see some losses, whereas on a big wellmade single 12psi is child's play for it. at least thats how i always thought of it.



kevin.

NoCal

I just don't understand how 12 psi can differ from 12 psi in any way? the twin turbos seem more efficent at lower boost since you have little to no boost lag from the seq turbos. Doesn't the larger turbo of the 2 push 12 psi and the smaller one runs at a lower boost to eliminate turbo lag? If so, then you're still hitting 12 psi which according to all these ppl is safe on the stock turbo.

93 R1

Think of it like this:



The stock turbos are like a coffee straw. You can push 12psi through a coffee straw but there won't be a large volume of air. A single turbo is like blowing through a regular straw. Its still 12psi but its alot more air. More air = more power

94touring

It depends on your turbo maps wether or not a particular turbo will make more power than twins at lower boost. A large single turbo won't make as much power at 10psi as stock twins at 10psi. A smaller single turbo to medium sized turbo will defenitly make more power at 12psi than stock twins at 12psi. Then once you get to 15+psi the single will make tons more power than the small twins. The stockers being so small have to spin much faster than a larger turbo, hence putting more stress on them. My friend who installed my apexi turbo is running 12psi and the power difference from before to now is very noticable. He even still has the stock intercooler. The turbo spools just as fast as the twins, makes more power, more reliable, less heat, and looks much better.

rx7trix

No disrespect...but you guys have it all wrong 12 psi is 12 psi end of story. If you would like references on this by all means ..... Call Cam at Pettit or Bryan at rotorsports racing

rx7trix

I'm done with this thread...I agree with this guy's sig

Fe3Boost

34 people calling a horse a dog doesnt mean that a horse is a dog.

12 psi is 12 ps anywhich way you look at it.

94touring

I like his sig too



12psi is 12psi on any kind of turbo. However there are different trims, compressor and exhaust sizes that effect cfm. Kinda like on Brians 1st gen, he has q trim on a turbo with a .7 compressor and a 1.0 on the exhaust, while I have a P trim. If I were to run 12psi and Brian were to run 12psi he would make more power than me cause his turbo trim allows him to flow more exhaust.

93 R1

Agreed 12psi is 12psi no matter how you look at it. The difference in CFM between a single and twins, even at the same boost level, is where the extra power comes from.



No arguments here, just stating facts

9BASE3

Ok... First of all YES I AM AN IDIOT. So let me be goddammit.



Question: If in Non-Sequential mode (As the turbo's are after 4500 RPM, provided that the primary turbo makes 8psi) : Don't the turbos make a COMBINED psi? Like 12psi = 6psi per turbo? How does that seem to kill these stockers? Is 6psi THAT much for one of them?



Here's why I ask this...



The primary turbo, on it's own, makes 10 psi until transition... If the primary turbo can handle 10psi all by itself... why can't they (BOTH TURBOS) handle 20psi together?





Sorry for the NEWB question... I was always scared to ask that one on the other forum... afraid of getting banned.