---===The Official MAFT-Pro Thread===---

[phule]

you can still run blow trough with the gen II? so i could change out my mass and it would be better than a safc.

[junglesmacks]

Originally Posted by phule

you can still run blow trough with the gen II? so i could change out my mass and it would be better than a safc.

Yes.


I would do it right the first time and just go speed density with a T-Pro.. really not that much more and in the long run MUCH better..

[DriveFast99]

welll i got it all doen today, still gotta work on PT tracking, but WOT tracking and timing control is working great. im pulling 2* from 5k to redline, but i still need to fine tune that as well.

this things is working great and is a great tool.

[Quick Vr4]

drivefast99: how much boost are you running?

[DriveFast99]

Originally Posted by Quick Vr4

drivefast99: how much boost are you running?

15psi with 15gs.

i just realized i dont need to pull timing anywhere other than were my knock starts. so i will retune tomorrow and only pull timing in the 5000-5500rpm range.

[junglesmacks]

DAMN.. you are only pulling 2*'s and you are running 15psi?!!? What is your logger showing as uncorrected timing? What is your base timing?


I'm jealous as hell.. I'm pulling 5*'s and I'm only at 13psi on my 357's.. wtf is that.. I'm wondering what 3SX set my base timing to.. I need to check it..


Maybe those DSM SMIC's are working better than you thought..!


I'm thinking that such a low (36psi) base FP on those 580's are keeping your IDC's a little elevated maybe enough to run like that..

[Sephiroth]

I'm running 17psi with zero timming pulled, but that was on 450s at 50psi base pressure (~500cc), now that I have 550s I haven't retuned, so we will see. BTW what are your 357s comparable to? 15gish class turbo?

[junglesmacks]

Originally Posted by Sephiroth

I'm running 17psi with zero timming pulled, but that was on 450s at 50psi base pressure (~500cc), now that I have 550s I haven't retuned, so we will see. BTW what are your 357s comparable to? 15gish class turbo?

Yeah.. pretty much a 15G with a GTP price tag on 'em..

They came with the car.. I would have gone TD05 for as much as these stupid things cost new!


GTP 357 specs:

Compressor wheel - T3 "50" Trim
Comp Ind dia - 1.674
Comp Exd dia - 2.367
Trim - 50
Comp Housing - TD04-13G bored
Turbine wheel - TE04H
Turbine Exd dia - 1.88
Turbin Ind dia - 2.01
Turbine Housing - TD04-6cm2

TD04-15G:
15G
1.625
2.187
55
TD04-13G bored
TD04L
1.62
1.86
TD04L-6cm2

TD04H-15G:
15G
1.625
2.187
55
TD04H-15G
TD04H
1.735
2.042
TD04H-6cm2


So I guess no matter what I have physically bigger wheels on all 4, but I'm assuming that the higher the trim #, the greater the pitch? Is that correct? Greater the pitch = greater velocity of air.. and in that respect I'm lower than a 15G.. which would cause heat to build up like TD04's are known to do.. which would cause knock. As well as my exhaust turbine housing not being as large.. Again, a heat restrictor.

Am I right in thinking this?

[TurboBob]

the higher trim means a larger inducer diameter.

50 trim = .50 = the square of the ratio of the diameters of the wheel.

(1.674/2.367)^2 = .5

Bob

[DriveFast99]

Originally Posted by junglesmacks

DAMN.. you are only pulling 2*'s and you are running 15psi?!!? What is your logger showing as uncorrected timing? What is your base timing?


I'm jealous as hell.. I'm pulling 5*'s and I'm only at 13psi on my 357's.. wtf is that.. I'm wondering what 3SX set my base timing to.. I need to check it..


Maybe those DSM SMIC's are working better than you thought..!


I'm thinking that such a low (36psi) base FP on those 580's are keeping your IDC's a little elevated maybe enough to run like that..

yea but u have 660cc injectors vs my 580cc's. yea the lower base fp really does help out. my idcs are around 108 or so at redline. as for timing my logger i dont belive is showing corrected, so i just minus what i have corrected and where and thats how i figure out my timing, i dont know if its right but i think it is...