sleepermod

Intelligent research...... the 16g produces 550CFM at 22psi? and we mostly intend to boost 10-12psi max for stock internals, so thats half.

If the GT28RS/30R is choosen, it would probably give you much better efficiency at 10-12psi with lesser back pressure created at hot side.

Of course I also read that the spool time would again be alittle slower if compared to a 16g (since inducer/exducer are smaller). But I suppose the gap difference or spool time can be reduced if you use a EL manifold as the exhaust pulses from the runners would be more consistent (pulses line up one after another) and converge at the collector, thus driving the turbine wheels faster + the fact that the CHRA is ball-bearing......

Yes, I think you are right Enrique.... The GT series would be a overall better choice even if you do not boost above 12psi + it gives you room to grow in the power department after beefing up the internals.

Good work and info to save me dough in the long run

rhythmnsmoke

I actually came across research articles stating that EL manifolds will spool a turbo slower than a log style mani.

Enrique9876

i agree to a certain extent (the car with the most hp doesnt always win the race) but i also made it pretty clear that i found it to be a great DRIVER mod (for the feel you know?) i think i even said not a racing mod...... unless you build the head and such....

also ive driven both turbos at 14psi and the 16g I FELT "fell" off later in the RPM band and the gt30 keeps me pinned to 6200.

again im only going by feel obviously i never raced my car with the 16g and the 30r at the track so i cant give you accurate numbers about my car at 14psi

rhythmnsmoke

Yeah I know the butt dyno can feel different. But when you actually put them down the track, I can assure you that the 1/4 mile times are going to be within tenths of a second difference (with the 16G perhaps coming out on top), I guess people have a different preference in things. They either want it on the low end, or on the top end. They kinda cancel each other, one spools earlier but falls off at the top, and the other turbo is the opposite, a little later on the bottom end, and pulls harder up top.

Enrique9876

im glad i could be of some help

yea i have heard that the EL style helps with spool up and the ball bearing DEFINITELY will help ... as far as what rhythmnsmoke said im just going by what ive heard but id definitely like to see that link to check that research out. either way im sure there are LOTS of factors affecting spool. motor displacement, flow, turbo, manifold, DP (exhaust) etc.

rhythmnsmoke

Found it.

http://www.turbobygarrett.com/turbob...o_tech102.html


For some reason I thought I read somewhere about the log style spooling faster. I thought it was here, but guess not...

sleepermod

Yes RnS, I did remember reading it somewhere that the log manifold was supposed to produce the fastest spool of all manifold designs.... but I can't recall where....

Funny it feels like we were both under the ZPI Hocus Pocus Mambo Jumbo VooDoo trance when we read about log manifold advantages

I think I'll hit up Google for log manifold to check...

Mr_Meaty

I remember readign that somewher to, but I don't know if it was the log style or the fact that log styles inharently have shorter runners that cause the quicker spooling.

rhythmnsmoke

^^I think that perhaps is the answer.