Will a 6466 work w ATR dp wg?

[troyk]

My mechanic seems to think I may not be able to open up the waste gate hole big enough to keep the boost down. Has anybody run this turbo with a full ATR header, dp & exhaust?

If I have to change to internal wastegate, is there any DPs that will fit around the ATR header, most the vendors I've found so far said not? I can go to a mini starter & aftermarket A-arms if that helps make it fit.

My build sheet:
250" motor
GN1 alum heads, mild porting of the runners
ATR headers & exhaust
BGC intake
Alky kit
Mega Squirt
6466 turbo
Roller cam, thinking 214/214

 

[troyk]

I have a few side questions, just didn't want to start a new thread.

What boost level is considered normal to make the motor last long time on pump/alky? The guy that is putting my car together is not a Buick specialist, but has a dyno a mile from my house & I was thinking of having him tune to say 24psi. Then hopefully take the car to Hartline to take it the rest of the way to what ever reliable level is(26-27psi), but don't know if he has a dyno or how he tunes his cars.

If I need a mini start, which one do u guys recommend?

Should I go with a 84 or 95lb injector for this motor?

What head gasket should I use?

This car is 99% street driven.

 

[achalmersman]

I just put a LT1 corvette starter (1996) on my car and love it.

I'm not a turbo expert but my engine doesn't breath anywhere near as well as yours. I have a 6266 with a HD gate. Slight enlargement of the puck hole and radius got boost to where I get 7 psi with the wastegate unhooked. Radius made the biggest difference

 

[kandc7]

I have a few side questions, just didn't want to start a new thread.

What boost level is considered normal to make the motor last long time on pump/alky? The guy that is putting my car together is not a Buick specialist, but has a dyno a mile from my house & I was thinking of having him tune to say 24psi. Then hopefully take the car to Hartline to take it the rest of the way to what ever reliable level is(26-27psi), but don't know if he has a dyno or how he tunes his cars.

If I need a mini start, which one do u guys recommend?

Should I go with a 84 or 95lb injector for this motor?

What head gasket should I use?

This car is 99% street driven.

What is a safe boost level? Well first boost is just a number boost does not hurt motors.. A bad tune will... Start small and increase the boost very slowly and make sure you add fuel with the increase in boost. Good luck.. Going fast takes time and patients..

 

[kandc7]

You have a nice build sheet there.. My new build is the same except its a stock stroke with full race port gn1. And I have the 214/214 fast ramp cam from fullthrotle .. Is the the same 214 your thinking about getting?

 

[troyk]

I was thinking of buying from fullthrottle or hartline, if they sell cam kits.

 

[kandc7]

I was thinking of buying from fullthrottle or hartline, if they sell cam kits.

Yes I got the 214/214 cam m from full throttle. I think it is a good cam. For that turbo.

 

[chris kirk]

My mechanic seems to think I may not be able to open up the waste gate hole big enough to keep the boost down. Has anybody run this turbo with a full ATR header, dp & exhaust?

If I have to change to internal wastegate, is there any DPs that will fit around the ATR header, most the vendors I've found so far said not? I can go to a mini starter & aftermarket A-arms if that helps make it fit.

My build sheet:
250" motor
GN1 alum heads, mild porting of the runners
ATR headers & exhaust
BGC intake
Alky kit
Mega Squirt
6466 turbo
Roller cam, thinking 214/214

Tune is the most important part of the application. Bad tune and bye, bye motor.... Doesn't matter how good/strong the build is. Have an experienced Buick person tune it. Also, why would you take all that time and $$$ to build a motor only to have a inexperienced person tune it? I'd be real careful doing that. Good luck.

 

[Reggie West]

The ATR gate will work just fine. I have one on my car. You may need 3 washers behind the spring to keep it from opening too soon but it works just fine.

Your build is not too different from mine. I run 20 psi on the street using pump gas and alky. That is with 20 degrees of timing on the top end. I am not afraid of much on the street either.

My turbo is a little bigger than yours but this should give you a good idea of where you can go. You can run 26 or 27 psi on the street but the tune better be spot on.