I agree with rich!!!!!

you want the QSV. I was a Supra with that Turbo and QSV....Night and day difference in performance.

With QSV not activated it wasn't very close between him and me (him on 30psi E85, me on pump ).....with QSV goin it was dead even....he then went something like 10.7@137 on first pass on DR's.

Tom

 

I don't see the 7675 T4 having a divided turbine option. PTE offers it only in open .81 and .96 T4.

 

whoops read what I wanted...it was on a 6765 not 76......but still!!!!! lol

Tom

 

All good, I spend 10 minutes googling this magical twin scroll you speake of.... and then thought that there must be a mistake.


As far as the drag strip goes, we will give it to Hal to make a pass once tuning is done. He seems to know what he is doing when it comes to big singles

 

you'lre goign to be about 6 months too late. I've already pushed mine with restrictive exhaust to 20psi on a mustang. This saturday with my cutout i'm planning on taking it to 3 bar on a dynojet. Based no my mustang numbers mid to upper 600's will be easy. It's already sitting at 560tq on 18psi on the mustang dyno.

 

i really wanted this but i'm hitting 18psi right at 4k rpms so spool won't be a factor since i'm revving out to 8k.

 

That is a solid power band Jeff.

 

yes it is....way too much for my street tires so i've found (even at 14psi).

oh for anyone that wants to know. The first pull untuned was 514hp on 16psi. A/f in the 9's and timing was only 12* at max rpm. I don't have the sheets to look through all the pulls though. the shop owner hasn't emailed any of them to me and i only checked the curves on a few pulls while i was tuning.

 

Sorry, but what does this mean? 3 bar = 44psi so I'm confused.

 

^ he is probably including 1bar atmosphere, so 29psi boost

 

Sasha, To get the 7675 in a divided housing you have to get the "GT42 Style", but its almost 3G's

 

Thanks and I found it:

http://www.precisionturbo.net/Street...GT42-Style/280

That is crazy to have such a price difference just because it is "GT42" style.

I just called PTE, and I guess the entire turbo centre section is different and housings are not interchangable. The only thing available for that 7675 is a T4 .81 and .96 a/r hosing.

 

Yea tell me about it. I was looking online a little while ago to see if i could find the gt42 style cheaper but the cheapest i found it was like $2700.

I was wondering if the gt42 style was any bigger physically that the 7675. Im not too familiar with the garrett line so i have no idea how big the actual gt42 is physically.

So just out of curiosity at the moment lol if the gt42 style was about the same size as the 7675, would a QSV have a chance of fitting?

 

Hal is correct I meant that i have a 3 bar map sensor so that's how far i plan on taking it on the dyno before i put the car away for the winter.

Put the mickey's on tonight and did some tuning up to 22psi. With 305 drag radials at 22psi it is not pretty on the street. I won't be doing any pulls above 18psi on the street again after tonight

Here is a little graph of the 6765 with a .96 a/r housing. I didn't start spool until 4k rpms so the boost shown is a little high in rpm. It's lower when i start at 3k rpms which i'll do later this week when i have time.

Sasha, does the 71mm have the divided housing? With what i'm doing on this 6765 I couldn't see anyone every wanting a 76mm for a car driven on the street. I actually was thinking about going to the 71mm but after tonight there is no way I want that in my car! Way too much for the street.

 

I am sure I could make it work. I will be under the car tomorrow evening again, and will have a closer look. I don't know what the actual length of the QSV is (end of actuator to opposite side of T4 flange). I would have to order one and play around. I don't think it would be a big deal to get it in there.




The largest divided housing turbo that PTE offers is the 6766, and it is available as a divided in the following a/r's: 84, 1.0, 1.15, 1.32. That is great to hear though.

 

I would say i would take one in a 1.0 a/r but i'm so sick of spending money and i don't race below 6k rpms anyways so i doubt it would make any difference in my setup. It would be fun to just have and brag about though!

 

6766 would be great on our cars.

I still wouldn't go bigger than 7175 unless you are going sleeved... Sasha is your customer going to be sleeved?

I can't wait to get my sh*t rolling again... Getting real tired of waiting on this machine shop... -_- and then after it's all together getting a tune...

 

damnit jeff is going to make power before I do..fml . I can't wait to see some numbers!

 

thought you where running stock intake and stock cams though?


my bad just saw your revving to 8k so def not stock intake and cams rofl

 

i'm already making more numbers than that american turd will ever make I keed, but seriously more numbers

ya, i have ported heads and 264 cams. Dual spring ferrea valve springs and all ferrea hardware. Heads are ported out quite a bit so i didn't want to get crazy with cams and shift my curve too far to the right. It's putting it down pretty good in this configuration