GT3071 spool on 5SFTE Options

[NGHTKD]

on mr2oc.com the 3071 peaks at 5k rpm (ats kit)... im just wondering and i know this is stating it very simple; would a 5sfe hit peak boost earlier 4800 with same mods due to +.2 OR later due to FE head?

i just need a rule of thumb to determine 5sfe compared to 3sgte... eg. spool times; lower / later rpms?

cheers,
cal

This post has been edited by NGHTKD: May 28, 2009 - 9:50 AM

[presure2]

cal..the 3071 spools alot sooner than 5k rpm. think more like ~4k, sooner on a stroker.
this is one example, at 19 and 22 psi :



mind you, these are 3rd gear pulls, 4th gear will spool a few hundered rpm sooner.
link to original thread on mr2oc
http://www.mr2oc.com/showthread.php?t=3406...;highlight=3071

i would expect the 3071 to spool ~ 36-3800rpm on a properly setup 5sfte.

I split this off from mk7celica's thread so that we could discuss this without going on about it in his thread.

[NGHTKD]

Thanks heaps for your reply Manny!

Im going to be running a T2 flange turbo/with 5bolt t28 outlet. The GT3071 that has a T25/T28 flange has been bagged on mr2oc due to the T2 size and not being a true GT30 turbo. Plus its a bit overkill in hindsight for my intended goals.

Theres just something about the GT2860RS... from watching Bruce H's car on the track I cant get it out of my mind. So yes i understand, it will have a boost creep issues, but I will most likely weld the wastegate shut and run a Tial 38MM. The thought of it on a 2.2ltr, torque!!!

The GT2871R is also off the list, as I've been looking over dyno graphs and they dont seem really that much better than a GT28RS. The GT28RS will make the power I want alot more responsively. Also the 2871R has got mixed reviews as some say its a mismatched turbo.

Sorry I sound a bit dumb when it comes to talking about turbo's but ive been looking on mr2oc.com, nissansilvia.com, turbobygarret, berk etc.... for dyno graphs and its doing my head in lol. A ****load more research to go but thanks again!

Cal.

This post has been edited by NGHTKD: May 29, 2009 - 9:52 AM