PTE GT turbos

[redrkt]

Originally posted by prostreetdsmx1
Ben,
to be honest i am really not positive on those numbers however i will find out the answer. As far as the Gt wheels, its been in my experince with the GT35 we installed on our MR2, the GT2832 we installed on our 240. With all of these projects we saw huge huge differneces in high boost usage. at 17psi these turbos were ok but at 26+ this things were f*$%in monsterous! the original turbos were t3/t4's with Stage 3 wheels. the stage 5 was on the MR2 and we liked the GT alot more so that is just personal experience.

and i really appreciatte your input in all this Ben.

Martin

Since you have personal experience with the gt turbo' verses the t3/t4s on the same car, could you post more information about the comparison? Like the specs of the t3/t4's, boost, and hp output verses the specs of the gt combo's, boost, and hp output for each car if possible. That would be pretty interesting.

 

[RDS]

Originally posted by redrkt
This is also why i think the 50 trim will do much better than the gt3251 at higher boost(25-30psi).The 50 trim has been proven to make ~380whp-420whp @ 20-23 psi, and up to ~480-500whp at 28-30psi.

The 50 trim you are talking about here is PTE's SCM50 or other manufacturers? If so what cams were used as well?

Thanks

 

[DSM90AWD]

Originally posted by RDS
The 50 trim you are talking about here is PTE's SCM50 or other manufacturers? If so what cams were used as well?
Thanks

Buschur Racing put down 505WHP on their BR500 (s/a SCM50) @29psi using 272/272 HKS cams and SM Manifold.

 

[RDS]

Thanks for that

 

[DCJ98GST]

Hey Martin, any idea of when your site will be updated to include more info on these turbos.

"Now carrying the brand new PTE GT3251 & GT3255 turbos! We had a dyno session this past weekend and will have video's and graphs up soon."

http://www.thespeedfactor.com/main.html

This message has been up for about two weeks now on the site.

Thanks

 

[DCJ98GST]

sorry double post

 

[prostreetdsmx1]

workin o n it bro. its been a hell of a last couple of weeks. We'll try to wrap all that up this weekend.

Martin

 

[RDS]

Originally posted by DSM90AWD
Buschur Racing put down 505WHP on their BR500 (s/a SCM50) @29psi using 272/272 HKS cams and SM Manifold.

Those figs on pump gas or racing? Soz forgot to ask last time

 

[DSM90AWD]

Originally posted by RDS
Those figs on pump gas or racing? Soz forgot to ask last time

Racing. No way you'd ever see 29psi on pump.. well unless your're running a Diesel Rig

 

[DSM mechanix]

Originally posted by DSM90AWD
Racing. No way you'd ever see 29psi on pump.. well unless your're running a Diesel Rig

...or unless you are Dre...

 

[Fourdoor]

Originally posted by Ben K

If you ordered a .48, you received the Mitsu housing. If you ordered a .63, you received the Mitsu housing. There's only one.

Ben

Are you sure about this? Seems more likely that they are using the 6cm^2 housing and calling it a .48 and using the 7cm^2 housing and calling it .63 If I remember correctly that is the approx A/R ratio's of the stock 14B exhaust housing (6cm^2 approx .48 A/R) and the 16G housing (7cm^2 approx .63 A/R).

Externally these two housings look identical.

Of course, I am on page 2 of this thread and this info has probably already been covered somewhere in the next 3 pages

Keith

 

[Revolution]

I personally think that said company is doing alot of in house costume turbos and MAYBE just MAYBE when they are asked for the bigger housing they just use the same old 7cm and just port it out , and then slaping on a different a/r reading . But hey that could far from the truth but It could still happen.

 

[redrkt]

Originally posted by Fourdoor
Are you sure about this? Seems more likely that they are using the 6cm^2 housing and calling it a .48 and using the 7cm^2 housing and calling it .63 If I remember correctly that is the approx A/R ratio's of the stock 14B exhaust housing (6cm^2 approx .48 A/R) and the 16G housing (7cm^2 approx .63 A/R).

Actually a 6cm is equal to a .41 a/r, a 7cm is equal to a .49 a/r, and an 8cm is equal to a .57 a/r.

 

[Fourdoor]

Originally posted by redrkt
Actually a 6cm is equal to a .41 a/r, a 7cm is equal to a .49 a/r, and an 8cm is equal to a .57 a/r.

Did a little research over at another forum and foudn this:

For turbine housings..

((CM x 8) - 7) / 100 = a/r ratio

Example: 7cm housing = .49 a/r

7cm x 8 = 56 ... 56 - 7 = 49 ... 49 / 100 = .49 a/r

6cm = .41
7cm = .49
8cm = .57
9cm = .65

So best bet on the turbin housings we are talking about is that either the guys at PTE don't know their ass from a hole in the ground and are sending out the same housing to people and just telling them it is either .48 or .63 depending on what the customer asked for... or they are using 7cm housings and 9cm housings and are just a little bit off on their A/R ratio claims.

Now I REALLY can't wait for someone to get both setups side by side and see which of these senerio's is the truth!

Keith

 

[90goldtsiawd]

Its been a long time and I still haven't seen any updates from Martin on his site? I'm having having a GT3251E put on my car in about two weeks and after reading this thread I really wanna see what this thing will do "real life" with the boost turned up. My setup probly won't go higher than 20psi on the street and about 24-25psi race fuel at the track. New information would be greatly appreciated. If nothing shows up by the time I'm done I'll post my own stats after install and a trip to the dyno.

 

[prostreetdsmx1]

hey all, sorry for not keeping you all updated. We Dynoed the GT3255 today on a 99 GSX. Put it on a AWD Dyno.
here is the car details

99 GSX
Custom Spearco FMIC
Turbo Back 2.5-3" exhaust
650cc
walboro 255
Datalogger
Computech EGT
AFC
no cams
poorly tuned setup
2 bad o2 sensors

The problem was that the car had a jimmy rigged lower IC pipe from when he upgraded his t-25 to a b16g. ? The best we mustered out of it was 257awhp. No keep in mind that the IC pipe kept blowing off and the A/F was all over the place, the fuel curve was horrible in my opinion. I'll post the charts monday when i get back to the shop. By no means should you judge this turbo by this attempt as the car wasnt ready at all for this kind of setup. We will rerun it shortly as i am gonna put one on my GST and we'll see what she will really do withsome who doesnt really give a shit if the whole thing blows the f* up!

Now i will say again we saw 21psi @ 3600 on the third pull the IC pipe blew off again and the EGT probe flew off the GD manifold! on that run at 4400 RPM's the turbo was flowing 23lbs/min and made 253awhp at 4400 before the pipe blew off so it obviously was going further.

In my personal opinion i would say that after various testing the GT32e55/51 are more for someone looking for more than a 16g but not as much as a t3/t4 setup. Excellent spool and from what i have gathered all the test cars running these are very happy with the driveability of these turbo and the quick and strong response from the peddle.

I will post more info Monday when i get back to the shop. If anyone has any particular questions please do feel free to contact me.
[email protected]
AIM:thespeedfactor

now may you all have a great saturday night full of drunken stupidity

Martin Ruiz
The Speed Factor
Precision Turbo Guineau Pig

*note to mods:
This is not intended for a selling purpose i am simply stating our experiences and answering questions so please dont boot me

 

[redrkt]

Now i will say again we saw 21psi @ 3600

Didn't the gt3251 spool ~21 psi at 3600 rpms when you dyno'd it as well? I thought the you said previously that the gt3255 spooled more like the 56 trim, above 4000 rpms? It seems strange that there is no difference in spoolup between the gt3251 and gt3255. You sure that wasn't a gt3251 that you dyno'd today?j/k

 

[90goldtsiawd]

Martin, have you done any new dyno runs on the car with the 51 with the boost turned up yet?

 

[prostreetdsmx1]

Didn't the gt3251 spool ~21 psi at 3600 rpms when you dyno'd it as well? I thought the you said previously that the gt3255 spooled more like the 56 trim, above 4000 rpms? It seems strange that there is no difference in spoolup between the gt3251 and gt3255. You sure that wasn't a gt3251 that you dyno'd today?j/k

it was a 3255, the 4k i had stated before was as quoted by PTE and I myself and our customer were pretty amazed at how fast this thing kicked in.

Martin, have you done any new dyno runs on the car with the 51 with the boost turned up yet?

We have not. the customer started school so its hard to really set anything up right now.

As i mentioned i will be running a GT32 on my car as soon as i finish it so i will be able to show some accurate numbers as far as what this thing can really do. the problem is these customers that i am using for testing are afraid to go to the max with this. well i am not! i have no problem blowing my own shit up if needed.

I will say my customer with the GT3251 has shown 359hp on his APEX REV METER. On the revmeter it read 301 and the dyno read 29* so who knows.

 

[Orange_dsm]

Originally posted by prostreetdsmx1

As i mentioned i will be running a GT32 on my car as soon as i finish it so i will be able to show some accurate numbers as far as what this thing can really do.

Any updates with this?

 

[prostreetdsmx1]

well it looks like my personal car is going to be sold by the end of the week. Gettin a G35 or 350Z but anyway we have a few cars in the works. we'll keep you all updated as we progress.

 

[redrkt]

Martin, i was curious if you have noticed any compressor surge from the gt3251 or gt3255 with them spooling so quickly on the dyno? Also congrats on the new ride!

 

[prostreetdsmx1]

thanks man, havent bought it yet. i'll probably pick one up this weekend. we didnt have any issues with compressor surge on either one on the dyno.

 

[redrkt]

Thanks for the info. So which one are you going to get? The g35 has my vote.

 

[prostreetdsmx1]

been driving both man, cant decide. 350Z is faster and hadles real nice but man the G35 is sweet and is so comfortable.