Possible project sooner or later....compound boost on my '99.

[KrisR]

As some of you know, Hellion makes a successful twin turbo Termi Cobra kit that keeps the factory Eaton blower intact. It makes boost almost immediately and also has a big top-end. They have made 1100+rwhp with a stock Eaton (stock pulley too) and twins on a stock longblock.

I happen to have an On3 kit waiting to be installed, and my car currently has a Kenne Bell 1.7 on it.

I am looking for reasons why this wouldn't work. If I hear some good reasons, I won't bother with the project. If there are crickets, Don and I will be undertaking this.

The KB kit moves the alternator to almost exactly where the On3 kit puts the turbo, so the alternator will need to be moved, along with the KB IC coolant tank / pump. Other than that, it should (theoretically) fit fine....the TB is basically in the same spot as an NA car.

I would go up to a bigger pulley on the KB, maybe pulley it for 8-10lbs or so, then put a 8-10lb spring in the On3 wastegate and go up or down from there.

I feel as though I could make 700whp pretty easily to start with and have a great wide powerband. Plus it would be fun.

???????????????????

[Notch]

While you're at it you should spray it too. Might as well have all the power adders in there if you're gonna do it.

[Brownman]

Don't spray and blowers like that do good together? Why add turbos?

[POOPY PANTS FACE]

sell it and buy a prius.

[octanehuffer]

Liquid supercharging is temporary power and futile.

[POOPY PANTS FACE]

Tuning would be a nightmare, single turbo or get a bigger s/c

[octanehuffer]

Sweet35th would scoff at that remark

[LilRoush]

I always have read/thought that one would prohibit the other when they hit their respective weak points.
By that I mean the turbo would keep the KB from sucking in all it could on the low end, and when it got up high where the turbo would shine, the KB would be a big cork in the airflow.

How would cooling work? Turbo into air to air then into the KB and it's water/air set up?

[KrisR]

How would cooling work? Turbo into air to air then into the KB and it's water/air set up?

Yes.

Also, just a bit of info....the MasterPower T70 that I have has a 0.68 a/r on the exhaust. I would probably switch to at least a .81 or maybe a .96 exhaust housing since spoolup time would be less of an issue.

[octanehuffer]

Ah yes the old windmilling effect. The boost is actually compounded through the blower when the turbo is effective.

[KrisR]

MMFF Hellion article:

http://www.musclemustangfastfords.com/features/mmfp_0801_twin_turbo_compound_boost_2003_mustang_cobra/viewall.html

[taank]

I like it

[wiplash]

Yes.

Also, just a bit of info....the MasterPower T70 that I have has a 0.68 a/r on the exhaust. I would probably switch to at least a .81 or maybe a .96 exhaust housing since spoolup time would be less of an issue.

You may have to look a little harder at the turbo. I think you're on teh right track with a .96 housing, but the exhaust wheel itself will be the end-all limiter in your combo. I'd imagine it could see over 700whp though.

[KrisR]

You may have to look a little harder at the turbo. I think you're on teh right track with a .96 housing, but the exhaust wheel itself will be the end-all limiter in your combo. I'd imagine it could see over 700whp though.

Know where I could get a 76 with a .81?

[TRDon]

Don't spray and blowers like that do good together? Why add turbos?

He owns the turbo kit now. The KB is on the car. Problem?

The way we looked at it, the air to air will be the turbo cooling side and with less boost for the sc, it will be more efficient and the air to water from the sc kit will take care of the rest. Twice bewsted, twice cooled. It actually seems like it would work pretty slick.