What turbo to get

[Momar]

Well, I am planning to get turbo, down pipe and injectors soon. I currently have a 3000 stall, but may change it if necisarry for spool up reasons. I have been doing a little reading, and have heard some good things about the GT67-P Trim. What does this turbo actually support? I am going to be picking up a set of heads that I will port and install before I do the turbo so keep that in mind. I also plan on using alky in the near future. I am still trying to learn turbo's, but understand what most of the specs are. I just dont know which one will fit my application best. I want something that will support 10's (with supporting mods of course).

Ben

 

[turbo2nr]

A GT67 will be the most turbo you can get in the $700 range. It has normal sized inlet/outlet on the compressor, works fine with integral wastegates. John Craig (Limit) calls it a TE67, but it does have a GT compressor wheel (67mm), and the P-trim is a small shaft turbo, I think it is the largerst small shaft around. The big shaft turbos are expensive, then add on more money for a GTQ turbine. For a street/strip, 109 block car.....I think it should rock. I have one (just got it), but the tracks are closed.

I sold my TE-61 (PT-54, same thing). It would not get me a magic 10sec. run with a stock motor. I hope the GT67 will get me there.. It should. Of course, if I did heads and a cam, I'd be there by now, but I have a young motor, with OEM gaskets. I'd be stupid to pull the heads off before I really needed to.

For the money, I'd say the GT67 looks like the biggest bang for the buck. Fits perfect, should spool up well on the street. I'm just guessing here, but maybe you can find someone who had experience with this turbo last year.

 

[tttype]

Is this turbo the same as the Precision PT67 ?

Im thinking of switch from a PT54 to a PT67,
By Precisions website guide the 54 supports 620 HP, the PT67 supports 795.

I'm thinking it may be a bit much for my combo.
.030 over 231, small speedpro cam, 9/11"
converter FMIC, alc inj, etc.

 

[Razor]

I've been running the small shaft JC TE67 for a few months. It loves the 3600 9x11 TCS converter.

The 54 would spool way to fast on this converter.

HTH

 

[turbo2nr]

Originally posted by tttype
Is this turbo the same as the Precision PT67 ?

Im thinking of switch from a PT54 to a PT67,
By Precisions website guide the 54 supports 620 HP, the PT67 supports 795.

I'm thinking it may be a bit much for my combo.
.030 over 231, small speedpro cam, 9/11"
converter FMIC, alc inj, etc.

That is exactly what I just finished doing. Sold my TE-61 for $550 (same as PT54), bought a GT67 (PT 67, same thing, also called a TE67). I found it for under $700 from Red Armstrong, built by John. This turbo is about the same as a 45 P-trim (which has a 66mm compressor) BUT, it is way cheaper. Also has the quicker spooling 67mm GT wheel. Goooood potential.

 

[Momar]

Sounds like I will probably go with this one. Is Red the best person to get it from?

Also, will my 3000 stall cut it, at least temporarily? I will get a new one if need be, but just curious.

Ben

 

[turbo2nr]

I bet the .63 A/R turbine housing will work well with the 3000 stall. You can always buy a bigger housing (.85) to go with a higher stall converter. Yes, Red Armstrong is one of the best to get this thru. Unless you have too much money and need to get rid of some.

 

[Real-T]

I got my GT67 on a great deal from B&E, at that time I had a TA60 with a 3000 stall converter....

I tried to resist but couldn't help bolting on the GT67 even with the 3000 stall in there.

There was too much lag to be fun. My 60's went down, and it really didn't pull until about 100-150' out. But my MPH didn't suffer.

It was a lot of fun on the highway though........

As soon as I installed the 3600 9x11, the car came to life and I pulled off some good 1/8th mile ET and MPH at around about 7.3 @ 94 but didn't have enough time for more tuning.

This turbo flowed significantly more air and subsequently needed alot more (10-12%) fuel over my TA60........

 

[Momar]

How much are housings, and which size are you using w/ the 3600?

Ben

Originally posted by Real-T
I got my GT67 on a great deal from B&E, at that time I had a TA60 with a 3000 stall converter....

I tried to resist but couldn't help bolting on the GT67 even with the 3000 stall in there.

There was too much lag to be fun. My 60's went down, and it really didn't pull until about 100-150' out. But my MPH didn't suffer.

It was a lot of fun on the highway though........

As soon as I installed the 3600 9x11, the car came to life and I pulled off some good 1/8th mile ET and MPH at around about 7.3 @ 94 but didn't have enough time for more tuning.

This turbo flowed significantly more air and subsequently needed alot more (10-12%) fuel over my TA60........

 

[turbo2nr]

Originally posted by Momar
How much are housings, and which size are you using w/ the 3600?


Good question!
So, what size turbine housing did you get? I bought a .85

Housings can be bought for around $100, maybe a little more. Selling the old housing to someone should be no problem.

 

[Real-T]

The Exhaust housing for mine is a .63. And I use the TO4E cover on the compressor, not sure if that is correct but it is the one with the 3" inlet.

I also have stock heads and cam, I think the lag comes from the engine trying to create enough energy to turn the larger wheel, so getting the RPMs high enough using a high stall gets it there. I would guess that this lag increases slightly with the .85 housing.

this statement could apply for any turbo, but I am stating this in comparison to my TA60, which had a stock exhaust housing and compressor cover.

turbo2nr, I am sure you will work out well with that turbo and .85 exhaust housing, but I think you will benefit from a higher stall converter, at least on the launch.

As an aside, I think something else that is pretty obvious is that you eventually get a turbo that is large enough and the bottleneck just appears on something else. This turbo (xx67) will definately push the limits of the stock heads/intake/cam and I think huge gains can be had with this turbo when the others are done too but can also perform well until those mods are done.

 

[Momar]

BTW, how big are the stock exhaust housings? So you think I should go with the .63 to start and go w/ the bigger one after the converter? I also plan to put on a set of home ported heads either before, or at the same time as the turbo.

Ben

 

[Momar]

Also, Real-T, what kind of gas and how much boost are you running?

Ben

Originally posted by Real-T
The Exhaust housing for mine is a .63. And I use the TO4E cover on the compressor, not sure if that is correct but it is the one with the 3" inlet.

I also have stock heads and cam, I think the lag comes from the engine trying to create enough energy to turn the larger wheel, so getting the RPMs high enough using a high stall gets it there. I would guess that this lag increases slightly with the .85 housing.

this statement could apply for any turbo, but I am stating this in comparison to my TA60, which had a stock exhaust housing and compressor cover.

turbo2nr, I am sure you will work out well with that turbo and .85 exhaust housing, but I think you will benefit from a higher stall converter, at least on the launch.

As an aside, I think something else that is pretty obvious is that you eventually get a turbo that is large enough and the bottleneck just appears on something else. This turbo (xx67) will definately push the limits of the stock heads/intake/cam and I think huge gains can be had with this turbo when the others are done too but can also perform well until those mods are done.

 

[turbo2nr]

Originally posted by Real-T

turbo2nr, I am sure you will work out well with that turbo and .85 exhaust housing, but I think you will benefit from a higher stall converter, at least on the launch.

I have had a tough time with too much torque right off the line. I have a T-brake, and a little gas makes 10psi very quick, then hits hard. I think my Art Carr converter is much looser than what I ordered. I need 4th gear, even with 28" tires. I am going to keep it and just run through all of fourth. I am putting in 4.10 rear gears now to use more of 4th. Trans is tough, I filled'er up with goodies.

As an aside, I think something else that is pretty obvious is that you eventually get a turbo that is large enough and the bottleneck just appears on something else.

One day, something will break. I will then build a decent motor. For now, if it ain't broke, don't fix it, works for me.

 

[Real-T]

turbo2nr, having a T-brake definately makes a difference in the "effective" stall of the trans, and it seems that it is working well with you.

And I wholly and completely agree that if it ain't broke don't fix it. I have a friend up here with an '87 GN that busted off a 11.1 @ 122 with an unopened, untouched engine with a PT61.

Momar, about the boost and gas, that is something that should have been mentioned throughout this discussion.

For the most part I run at about 24+psi, and use pump gas with the Alky Control (Razor's) kit. This turbo comes alive at the higher boost. In comparison, my old TA60 came alive at 22psi (over the stock one), but was pooched at around 25-26psi (or so it seemed).

I haven't had much time to play with the 67 since I got the turbo and converter installed late in the season.

I would bet with good heads/cam/intake, the same performance can be had at lower boost (as compared with an all stock engine), but more gains would be made at the higher boost as well.

Oh yeah another thing to consider, is that with a turbo that flows this much air, removing as many bottlenecks as you can will see that "795 hp" that it can support, so along with heads etc, a good intercooler is something to consider......oh yeah and fueling....but that is a whole other discussion....