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TurboKraft TurboKraft is offline
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Join Date: Mar 2005
Location: Phoenix, AZ
Posts: 2,541
My favorite 911 Turbo ever?

BSF -- I think this meets your target? About as much HP at 3,000rpm as a 997TT with VTG turbos, more low rpm torque than a 993 Twin Turbo -- from a simple 7.5:1 compression '94 Turbo 3.6 with EFI.

1994 Turbo 3.6
* B&B headers, ceramic thermal barrier coated (2200F rated)
* custom free-flow 3" stainless muffler, right side exit / wastegate exit left
* custom ball bearing Turbonetics "GTK" turbocharger (custom pre-production unit)
* B&B 1991-94 full-width intercooler (customer supplied)
* TurboKraft EFI-T camshafts -- requires notching pistons for additional valve clearance
* TurboKraft prepared cylinder heads: moderately ported & polished, niresist ringed (cylinders machined, too), twin-plugged
* port-matched & blended intake manifold
* ARP head studs & rod bolts
* RS flywheel conversion package + GT3 disc + GT2 pressure plate
TurboKraft's 1976-94 911 Turbo EFI conversion
* AEM engine management: injection + ignition + Lambda + boost control
* TurboKraft EFI Injector Blocks & Stainless Fuel Rails, -6AN braided fuel lines
* 2x Bosch triple coil packs -- distributorless ignition
* 6-channel CDI (Capacitive Discharge Ignition)

Tuned on plain west coast 91-octane "premium" oxgenated pump junk.
Ran just fine at 1.25 bar boost, no issues, even in 110F August.
Didn't have to rev to the moon, it was done by 6,000rpm.
Pulled like crazy in any gear, any rpm.
Devoured roads.
An animal.

Yellow line = 1.25bar boost, EFI
Red line = 0.9bar boost, EFI
Blue line = 1.1bar boost -- baseline with CIS injection, K27HFS, catalytic test pipe

Maybe the best single turbo -- maybe the best 911 Turbo -- I've ever built.
One of the only cars I've wanted to keep.
Chris Carroll
TurboKraft, Inc.
Tel. 480.969.0911
email: -
Old 04-14-2010, 05:14 PM
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