924Board.org

Sunset924 · Joined: 30 May 2017 Posts: 44 Location: PA, USA

Awesome project! Just a little input from a former hx35 user: I had this turbo on a 4cyl engine with 1.9l of displacement and I could barely get it to spool before 4.5K... then it would promptly take me right to redline. this turbo was designed primarily for diesel applications with displacements between 5 and 6.5l... I ended up feeding it with a tdo4 (compound setup) but that’s an entirely different story. A street car would certainly benefit from some low end grunt off the line, I think that much lag would take some fun out of it, and no one wants to 2 step this thing off every stop light just to pull out faster than the mini van next to it. I would shop turbos based on compressor maps and see what fits your needs.. albeit it’s a big part of your puzzle, but it’s not the entire game. Good luck on your quest!

michel · Joined: 25 Feb 2018 Posts: 14 Location: Australia

Just a bump for an interesting project

Any progress ? I have a cgt rep built on an n/a that I’m looking to repower.

Re: CIS I will replace my WUR with the DKUBUS Ewur.

https://dkubus.com/?product=frankencis-e-wur-basic

Fitting one to my 932 as well
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931 stock, 1 of 130. Frankencis conversion in progress

Carrera GT wannabe , currently seeking parts
944 Turbo
924 turbo (for sale)
924 martini (for sale)
75 911 narrow body IROC project
914/6 GT project

Fasteddie313 · Joined: 29 Sep 2013 Posts: 2036 Location: MI

Carrera RSR · Joined: 08 Jan 2010 Posts: 2005 Location: Somerset, UK

If I were starting again with my car, I’d buy a crate GTS motor and all GTS spec ancillaries from Mittelmotor. Their race GTS makes 395 bhp on stock GTS spec CIS and K26 #6 with modified compressor side. It’s pretty quick in FIA historic racing only being beaten by 935’s. They can sell all parts and build cars from scratch. Their GTR build is pretty impressive too.
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1980 931 - forged pistons, Piper cam, K27/26 3257 6.10 hybrid turbo, 951 FMIC, custom intake, Mittelmotor dizzy & cam pulley, H&S exhaust, GAZ Gold, Fuch'ed, Quaife
Now www.924board.org/viewtopic.php?t=34690
Then www.924board.org/viewtopic.php?t=31252

Fasteddie313 · Joined: 29 Sep 2013 Posts: 2036 Location: MI

iirc the GTS injection system is a 928 FD and all off-the-shelf CIS parts from Bosch, other than the custom fuel lines, mounts, air filter box, etc..
Injectors are standard 931 injectors..

I would consider a CIS-e V8 fuel distributor on FCIS superior to the old WUR based CIS of the original GTS/928..

I don't have any idea what a GTS crate engine and all ancillary components must cost, but at that point I would be more likely looking at a catalog of Chevrolet crate engines..
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80 Turbo - Slightly Modified