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

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.

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