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post #1 of 18 Old April 10th, 2016, 04:25 PM Thread Starter
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is this turbo to big

This is the turbo I'm looking at getting. I"m thinking of going with the 87 x 80 with 1,25 ar in a T6 . Or should a go with 83x74 with 1.25 ar. I just don't want it to have a pot of lag.


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post #2 of 18 Old April 10th, 2016, 05:29 PM
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I would say thats way to much for our 4.6's your going to be spooling for days, but if you're looking for big power in the top end and revving the motor out past 7k I would say its perfect. The real question is what are your goals for the car? A roll racer, dyno queen, track car, or just fun street car? That will determine your turbo sizing.

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post #3 of 18 Old April 10th, 2016, 06:29 PM Thread Starter
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The ultimate goal for the car is to try to be competitive in local mustang quick 8s. Which is getting the car mid to low 5s in the 1/8. I'm still about season away as this year (if my buddy finishes my car) I won't have the transmission set up I will need.

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post #4 of 18 Old April 10th, 2016, 08:34 PM
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Will you be revving over 7k? If not your gonna be in full boost for very little rpm.

In 1/8 mile you're gonna want a really fast spool off the line and already pretty much be in full boost and hold it. Which the converter you choose will play a large part in this as well. But an 83 seems a bit overkill granted you're not revving it to the moon. I would look more at an 80mm or a 78mm for 1/8 below 7k rpm.

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post #5 of 18 Old April 10th, 2016, 09:02 PM Thread Starter
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My cams and intake are set up for 7k plus. Since I run the 1/8 with a 28" tire on my new setup I'm thinking about switching to a 3:73 gear which should help keep my rpms up and in the power band. Next year I'm planning on switching to a turbo 400 trans with a transbrake. They also have that same turbo in an 80mm version.

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post #6 of 18 Old April 10th, 2016, 09:29 PM
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Well then I would go for that 83mm, Just have to make sure you're leaving the line with a lot of boost built up, or its going to fall on its face on the line. Or you can look into an s480 which is a little smaller but are dead nuts reliable.

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post #7 of 18 Old April 10th, 2016, 09:36 PM
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Sonic I think that turbo is to big for our smaller CI motor youll have trouble spooling it fast. If your roll racing youll be ok but if your wanting fast power youll be disapointed. I went over things in depth with precision and we calculated a 76 being the top of the line for our CI motor.


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post #8 of 18 Old April 11th, 2016, 09:10 AM
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Lol hell yea it's gonna be laggy.

But low 5's and fast spool time don't really go together.

That turbo is probobly good for 1300+rwhp


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post #9 of 18 Old April 11th, 2016, 10:16 AM
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1300+rwhp
You think the sbe will handle it :. If so ill take it.



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post #10 of 18 Old April 11th, 2016, 10:33 AM
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If you're shooting for 8s a T6 turbo like that will do the trick. I just hope you're running a loose stall and have a transbrake, and don't expect it to spool ultra fast.

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post #11 of 18 Old April 11th, 2016, 11:25 AM
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Honestly if its to big and lags off the line, nothing a little shot of nitrous couldn't fix.

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post #12 of 18 Old April 11th, 2016, 11:32 AM
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For reference I went with 9.11 @ 149mph with just a box S475 and a set of stock 2v heads.

Had I had a little more time I think I could have gotten it into the 8's pretty easily.

But yes a trans brake and a proper trans setup is required.


853rwhp @ 23psi
75mm Turbo 5.4 swap E85
#turbo2v

10.11 @ 138mph STOCK LONGBLOCK
9.11 @ 149mph - New Longblock /w Powerglide

www.JPCracing.com 410-729-0005 ext. 11

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post #13 of 18 Old April 11th, 2016, 12:23 PM
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Honestly if its to big and lags off the line, nothing a little shot of nitrous couldn't fix.
+1
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post #14 of 18 Old April 11th, 2016, 01:54 PM Thread Starter
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after talking to Bullseye they suggested a S480 street billet with a 96 x88 wheel and 1.32 AR. what do you guys think of this turbo. The trans setup will be TH400 with trans break and a bump box

I just need somebody to buy my gt42 so I can order one.

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post #15 of 18 Old April 11th, 2016, 02:02 PM
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after talking to Bullseye they suggested a S480 street billet with a 96 x88 wheel and 1.32 AR. what do you guys think of this turbo. The trans setup will be TH400 with trans break and a bump box

I just need somebody to buy my gt42 so I can order one.
I would listen to Bullseye, they probably have much more experience in these types of applications.

You can also call a few other turbo dealers and see what they recommend. Always good to have more than one opinion. You may also try contacting Forced Inductions and see what they recommend.

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post #16 of 18 Old April 11th, 2016, 06:13 PM
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S480 will work.

Again the converter setup is going to be key


853rwhp @ 23psi
75mm Turbo 5.4 swap E85
#turbo2v

10.11 @ 138mph STOCK LONGBLOCK
9.11 @ 149mph - New Longblock /w Powerglide

www.JPCracing.com 410-729-0005 ext. 11

PM me if you need any parts or advice!
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post #17 of 18 Old April 11th, 2016, 06:59 PM Thread Starter
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Originally Posted by Sc9tt View Post
I would listen to Bullseye, they probably have much more experience in these types of applications.

You can also call a few other turbo dealers and see what they recommend. Always good to have more than one opinion. You may also try contacting Forced Inductions and see what they recommend.
Jack at bullseye took the time to go through my set up and goals

Spoke to someone at forced inductions wasn't impressed with there one size fits all approach. I'm going to call Reed at work turbo chargers also. He has done a rebuild for me a few years ago.

---------- Post added at 06:59 PM ---------- Previous post was at 06:55 PM ----------

Quote:
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S480 will work.

Again the converter setup is going to be key
My converter is pretty loose I'm going to put it on the dyno and adjust the converter after I get some results.

02 roush turbo forged and built
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CG T6 hot side billet BW S478 with race cover
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post #18 of 18 Old April 11th, 2016, 08:28 PM
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Sorry to hear that man, I've heard good things about them. You may also want to try Real Street Performance they only sell precision and Garretts but I have heard they take their time to go through your goals and setup for best application. And don't be fooled by their allotment of imports they started out as a mostly mustang shop so they know their Fords as well.

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