GT67 with stock motor??

[Alaskabuick]

I have an 67 turbo sitting on the shelf not being used.

Would it work with a bone stock block, stock heads and some 50lbs injectors and a 3600 stall vig converter?

Or are my heads too small to utilize a turbo this big?

thanks...

Dennis

 

[jetmech]

I''l trade you my gt 61 w/ ceramic coated exhaust housing for it.

 

[Sweet6]

I have an 67 turbo sitting on the shelf not being used.

Would it work with a bone stock block, stock heads and some 50lbs injectors and a 3600 stall vig converter?

Or are my heads too small to utilize a turbo this big?

thanks...

Dennis

It will work fine with that stall. Probably not an optimum set up. But it will work ok. My buddy used one with a 3200 stall on a stock motor. It was kind of laggy but it was fine at the track.

 

[WLDWST]

I have a GT67P with a stock long block. Along with Alky,bolt ons, and 60s. I have a 3600 stall and it drives like a stocker. That is, until you get into it. Not laggy at all. 25lbs no problem. No regrets here.

 

[bison]

It will work best at 33-35psi with stock heads/small cam

 

[WLDWST]

It will work best at 33-35psi with stock heads/small cam

That's alot of air with that turbo. Holy Moley.:biggrin: I keep mine at 25 or less. I hate headgasket problems.

 

[bison]

That's alot of air with that turbo. Holy Moley.:biggrin: I keep mine at 25 or less. I hate headgasket problems.

Its not a lot of air with a stock or nearly stock cam and stock heads. Mass flow would be nearly the same as a car with a 210 cam and CNC iron heads at 26-27psi which would go about 126-127mph in a 3700lb car on a decent tune. Your still in the high efficiency part of the map even at those examples. Big difference when you add 700 rpm and the heads flow 30% more on the intake and 55% more on the exhaust with huge gains at low lift vs. stock ports and stock valve job. You could run 40psi with a 67 on a stock long block if you could keep gaskets on it and still not be out of turbo. Boost is just a number. Mass flow is whats really important. If you have/had head gasket problems you probably did not have enough octane. Ive been to 27psi on stock gaskets/bolts many times.

 

[GNBRETT]

It will work best at 33-35psi with stock heads/small cam

33-35 PSI. That's it?:biggrin:

 

[WLDWST]

We have established that a GT67P is not a problem on a stock long block. I have no problems at all at my 25 lbs. However, I am curious about max boost on a stock long block. Assuming good fuel supply and safe tune, is that amount of boost even safe without a reinforced bottom end? Just curious.

 

[GNBRETT]

We have established that a GT67P is not a problem on a stock long block. I have no problems at all at my 25 lbs. However, I am curious about max boost on a stock long block. Assuming good fuel supply and safe tune, is that amount of boost even safe without a reinforced bottom end? Just curious.

You would certainly think so but I can tell you first hand that Bison has a street car with a stock bottom end and beats the balls off it and I can assure you it's faster then then 95% of the members here will ever go in their car.

He drove it for 2 years before he had any issues and I can assure you very few will drive their car that hard. And he ran it at 27-28 PSI all the time. There was no cruise tune...

But..... It also never detonated and he ran race gas all the time. So is it possible to throw that much power and have the bottom end hold up? Definately. But knowing how to tune the XFI is one battle, the other is putting up the $$$$$$ for gas.

 

[bison]

We have established that a GT67P is not a problem on a stock long block. I have no problems at all at my 25 lbs. However, I am curious about max boost on a stock long block. Assuming good fuel supply and safe tune, is that amount of boost even safe without a reinforced bottom end? Just curious.

At 25psi with stock heads and cam you will be lucky to go 121mph in the quarter. I wouldnt be concerned about the bottom end in your stock long block till you are over 125. If you are detonating it could fail at any power level. I ran up to 33psi on the stock bottom end on a combo that went 10.29@133.4 at 28.5psi. As Brett said i drove it really hard all the time

 

[WLDWST]

121 mph still makes a pretty stout street car. Knocking on tens. Probably enough for me, especially with no bar and such. But who knows, maybe that boost controller of mine will find a new setting. Good info. Thanks.