I have a stroker 252ci, what turbo?

[Mike Licht]

If he has a 6776 he has plenty of turbo. The converter will most likely need to be addressed. If he's looking to drop some coin and only wants mid 10's the 6262 will cover it and spool slightly faster than the 6776. If he went with the ball bearings it would be even better. The $ spent just goes up. I've seen journal 6776 turbos spool well on the street with an 18 blade ptc 9.5". He will capture a lot of e.t with one here. At 25psi/22* the car should run 10.50's if the tune is there and he can leave hard. Valve springs should be investigated.

I have an 18 blade 9.5" PTC here in stock that a guy did not take that I would sell for the right price
Mike

 

[Dusty Bradford]

My approach on building a combination changed years ago about converters.

When I had to borrow a converter to make a race, I used a 5500 stall to replace my 4000 stall, and my car performed much better.

I did have it tightened to 5000 stall where it has been for years, and can leave with any big-block car off the line on a pro light.

On a street car, too tight easily smokes the tires, instead of giving you good traction.

I prefer to go looser rather than too tight with converter stall, especially with larger turbos and a performance application.

My opinion, most owners and people giving advise have little personal experience with converter selection, and almost always go too tight.

Just want to add, my turbo is a 70 BB.

What rpm do you see at 0-1# of boost? That's the best way to judge what we are working with in the turbo world. I can take a 5000 stall out of a Big block chevy, put it behind a V6 Buick and it may stall 3500.

 

[turbo john FL]

MIKE DID YOU GET RID OF THAT PTC YET ?? RIGHT PRICE PRIVATE MESSAGE ME john

 

[Mr.Spool]

if i read your comments accuratly you ran a 44 at 18psi to 11.5 119mph,but wanted a bigger turbo to run in the 10's.your running a pro-torque 3200 but you left out the diameter(10,12,9.5 etc).going on this info you want to run 10's but left out where in the 10's.with your combo,i can't see why you just don't turn up the boost on your 44,you are making alot of changes that may not be necessary.i took a 49,at 3800lbs on a stock motor(mild port head),and drag radial to 11.1, 125mph on a 3200 10.5 lockup protorque.but it ain't going to do it on 18psi.if your converter is a 9.5 protorque 3200 it can be loosened for the bigger turbo. you should at least try to max what you have,the 44 can run 10's but your combo could easily support a bigger turbo.11.50 on 18psi on a 44 is starting off good.

 

[QUIP'6']

its a 67. the 44 was on his old sig that he did not change yet. and its a 9.5 protorque

 

[bad V6]

I would think that he has the parts to go into the 10's. Perhaps getting a better handle on the tune will yield your desired results. If the combination is slow to spool, then what are your wideband or o2 readings, you may need to adjust the fuel and/or timing and boost to get a better ET. I would try to get the boost into the 22# range with the appropriate fuel and timing, launch at around 8-10#, should be in the 10's.

 

[Mr.Spool]

a 9.5 3200 protorque will spool a 67/p start adjusting the tune.

 

[Dusty Bradford]

I agree but it has to be a true 3000-3200 stall. Some of them have stalled less than 2800 although they are called a 3200.