Help With Turbo Selection

[cdub]

After spending many hours reading over the numerous threads on which turbo is the best for what setup, the only common thread seems to be that it depends on what you have and what you want to do. So rather than blindly throwing a dart, and hoping for a bulls eye, I will appeal to those with more experience than I for help. The tranny is getting rebuilt this week so I have some wiggle room on what I can do with regards to the tranny/tc Stock tc is still good if I don't need a higher stall speed.

What I want is a faster street car that will spool quickly and not need to launch @ 3500 RPM's from a red light and will put up good HP in the middle/top end. I will occasionally take it to the track for some 1/4 mi times, but this will mainly be a street car. Looking for mid/low 11's

Here is the current setup:
stock turbo, DP, headers, exhaust, tc
60# injectors, hot wired 340, K&N intake, Adj FPR
P&P Heads
Complete Custom Engine Build:
- Federal Mogul Forged Pistons .030
- Sealed Power Moly Piston Rings
- Clevite 77 P Series Main Bearings
- Clevite 77 H Series Rod Bearings
- GM Front Timing Chain Cover
- Dura-Bond Performance Cam Bearings
- Crane Cam & Lifters
- Crane Valve Springs
- Crane Valve Keepers
- Manley Pushrods
- DynaGear Double Roller Timing Chain
- Melling Oil Pump
- Melling Oil Screen
- Fel-Pro Gaskets, Oil & Filter
- 4 Angle Valve Job

I would like to put off doing the exhaust/dp till next year if possible, so I am looking for something that will work with the existing setup but will allow for an upgrade to a th 3" dp later. Could always put it a cutout now if back pressure was a big issue.

Based on my research so far, I am looking at the following as possibilities:

GT6152E - currently my top choice, worried about spool speed, lag, and lack of track record. leaning towards running orange stripe tc (3k stall) with this. Seems to offer the best et/hp with least stall (less spool?) needed. Anyone running this?

TE-61/62 - Worried about going too big and creating lag issues but the et/hp #'s are nice.

GT3255E - worried that this won't be enough turbo and I'll end up replacing it again later, fullthrottlespeed claims no tc upgrade needed for this, anyone know about this?

TE-44 - Same concerns as the GT3255, but at least this is a proven commodity. Any idea on how the stock tc works with this?

Chris

[R.MERRITT]

Obviously you'll need a DP and exhaust....You know that already.

You didn't mension how big the cam was...

My vote would be a BB-T-66 P trim, .63 housing.

Did Custom in Weymouth doing the engine?

[cdub]

J.C. Auto built the engine, out of Gardner, MA I think. My old mechanic was in Ashland, this was someone he knew. I actually don't know the #'s for the cam, think it is around 200/200 but I was never able to get the exact info, one of the reasons he's my old mechanic.

About the DP/Exhaust, will I be able upgrade the turbo before I deal with that or will this have to be done at the same time?

Where can I get some info on the BB-T-66 turbo? Is this a PT-66? Dave @ Pro-Built in Holbrook is rebuilding my tranny, said he knows you merritt.

/cw

[TurboMondo]

Jack Cotton

www.cottonsperformance.com

[cdub]

Didn't see a BB-T-66 turbo on cottons site, maybe I'm missing something...

Trying to nail this down so I can order the tc, going with a billet 9x11 but need to figure out the stall. Any resoloution on the PTS vs CK debate on these?

[R.MERRITT]

A T-66 and the stock dp........No. It will bolt up but not a good idea. When you do a 3" DP/exhaust, the 66 would fit perfect with the rest of the combo and give the power your lookin for....

A 44/49 would have some power and bolt up but most that get them end up upgrading...... You could run em with alky and have fun for a while. Another option. Depends on what you call fast really.


Dave built me a trans in I think, 99..... He likes GNs....

[R.MERRITT]

6152 would work fine with your combo........You have the right idea... Goodluck!

[JCotton]

Didn't see a BB-T-66 turbo on cottons site, maybe I'm missing something...

Trying to nail this down so I can order the tc, going with a billet 9x11 but need to figure out the stall. Any resoloution on the PTS vs CK debate on these?

Chris,

sorry about the web site, there is much product I have yet to enter........ just not enough hours in the day to do everything. Hope to get back to entering product soon. As for your combo, you didn't mention what inter-cooler you have or plan to have, it's also important in determining what turbo to use. The TC also needs to match the turbo as well as the injector. The cam is not as critical, since turbo cars tend to work well with most small cams. Since you have the 60lb injector, I would suggest you keep the turbo size around a 61mm turbo, a 66BB turbo, although an awsome choice in some case, does not appear to fit some of the upgrades you already have. Ball Bearing is always an excellent choice,but we also can supply you with standard bearing turbos just as capable, requiring a tad bit more of stall. If you are going with a 9-11 you must first determine what turbo you are going with, then you can determine the stall. I use a 10.5" convertor for most applications thAT SEEMS TO WORK VERY WELL with the 60 series turbos. If you would like to give me a call at the shop I would welcome the opportunity to help you put the rest of your combo together.
hope that helps,

[cdub]

Still running the stock IC for now. After the tranny/tc and the turbo/dp/exhaust are done, I'll be looking to do the IC, MAF, and 4" intake. So many things to do......

[cdub]

Think that I am settling on the GT6152 turbo with a 9x11 billet @ 3200 stall. Any thoughts on the stall speed with this combo? Think I will suck it up and do the DP/Exhaust at the same time to really unleash it. Gonna need better rubber soon....

Chris

[quickv6]

Mr. Cotton has some very nice exhaust systems and downpipes. Mine is from a few years ago but I believe it's 2.75 mandrel bent, tweaked and checked by jack before shipping. Fits perfect!

[8tsixt]

Think that I am settling on the GT6152 turbo with a 9x11 billet @ 3200 stall. Any thoughts on the stall speed with this combo? Think I will suck it up and do the DP/Exhaust at the same time to really unleash it. Gonna need better rubber soon....

Chris
not to highjack your post ,but i second his question.

[Marc87GN]

I wish I had track numbers for you, but all I have, because of the new block, is SOTP. You will not be disappointed with your combination and the PT/GT6152E. Since your heads are done, it will help with spool. I have about 10-20 feet of lag and then the tires are spinning all the way into 3rd gear. It's almost a false sense of security for the tires. I also have a brand new 10.5" 3200 stall Protorque converter sitting in the trunk. I was running a Raptor 9 X12 and getting 5600 rpm shifts and barely 250 rpm drops, but when fully locked at 81 mph, look out. The turbo pulls very well past 100 mph even in O/D.

I love this turbo and it's efficient enough to allow me to run 20-21 psi on straight pump gas with 17 degrees of timing. The most knock I have seen was 0.7 at lockup, otherwise, no knock. I'm 100% confident, when I install an alky kit & supporting traction mods, I will be able to run 10s with this turbo without any problems on 93 octane.