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Join Date: Jun 2004
Location: Siesta Key, Florida
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TurboKraft love and dyno results

As some of you may recall, I shipped my 934 tribute car to Chris to custom fit a second hand Prototech intercooler I purchased that sat too tall to clear my DP decklid and to fit and dyno tune the car with my new Bisimoto/Turbonetics billet 6162 turbo. While there, Chris and crew also fabricated a 934 style wastegate pipe and matching tip for the Rarlyl8 hooligan muffler I run.

First run on the dyno proved anemic (290 rear wheel horsepower) which was traced to improper timing and a leaking distributor vaccuum line. Second run netted 360 HP /347 torque to the rear wheels at .8bar. A tweak to the mixture and boost dialed up to just under 1.0 bar got me 377 HP/369 torque. Not too shabby for basic bolt ons (headers, sc cams, intercooler, leask wur, muffler, tial wastegate, etc).

Dyno graphs and pics for those playing along. Weight at 2562 lbs with a 1/4 tank of gas. (I know the corner weights are all over the place. The car will get aligned and corner balanced soon enough).

As you can tell, she is pig rich in the mid range. Looks like it is time for the enrichment delay that Leask sells unless you guys have a better source.








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JP
86 930/4 tribute beasty
81 sc beach beater
55 Belair
40 Ford pickup
Old 05-23-2013, 08:44 AM
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Oh yeah, look at that torque increase from 2500 to 3500...Wheelspin anyone?
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JP
86 930/4 tribute beasty
81 sc beach beater
55 Belair
40 Ford pickup
Old 05-23-2013, 08:47 AM
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Brando
 
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OK, 360 hp at .8 bar on a stockish engine.... Thats great! That sounds like a great turbo. Obviously the headers and muffler help that. Sounds like you have more in that turbo too.
I'd love to know what the in and out temps are on that intercooler. That thing is huge! Looks great too.
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Turbo powa!
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Old 05-23-2013, 09:02 AM
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Turbo Hooligan
 
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Those are really strong numbers for being just bolt ons! I would let her stay pig rich in the middle, more flames on decel! or you could always let Chris convert her to EFI...i'm sure he could squeeze out more power, a perfect fuel curve, and give as much or little flames as you desire! I've really enjoyed following your build.
Cheers
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Old 05-23-2013, 09:06 AM
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That intercooler work looks great BTW. So smooth and nice.
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Turbo powa!
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Old 05-23-2013, 09:08 AM
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Quote:
Originally Posted by pkracer21j View Post
Those are really strong numbers for being just bolt ons! I would let her stay pig rich in the middle, more flames on decel! or you could always let Chris convert her to EFI...i'm sure he could squeeze out more power, a perfect fuel curve, and give as much or little flames as you desire! I've really enjoyed following your build.
Cheers
Thank you very much. Suspension will be next. I've got a full 935 set up with adjustable koni coil overs up front and Von coils in the rear, smart sways etc. just sitting in the den waiting. I'll probably go EFI in a couple years. I just want to drive this thing for now...
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JP
86 930/4 tribute beasty
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55 Belair
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Old 05-23-2013, 09:23 AM
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..."As you can tell, she is pig rich in the mid range..."

That's from where most of your power (3K ~ 5K rpm) is coming from; if you lean it down, you might see that "juice" drop significantly.
Old 05-23-2013, 10:40 AM
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enrichment delay

I have a new unit I'm not using. PM me if your interested. Philip
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Old 05-23-2013, 11:51 AM
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JP:


Big kudos to both you and the TK Guys !!!!!!!

Nothing better than a mistress that is beautiful and scares the s--- out of you.

Cole
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Mods: TurboKraft Custom IC, 934 Headers, GSX 61, Zork, Port Work, SC Cams, Air Mod Fuel Dist Relocated, Water Meth Injection, BL WUR, MSD 6530, Greddy EBC, Synapse Bov, Short 2nd & 3rd with 8:37 R&P, Wevo Shifter, Coupling, and Mounts, MTX-L SSI-4, Big Brakes, Rebel Coilovers, Bilstein Sports.
Old 05-23-2013, 12:14 PM
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Great looking car/engine but I don't see where the turbo did any better than a K27-7200. The dyno graphs of my old red rocket look nearly identical at stock boost level. Am I missing something?
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RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds
'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
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Old 05-23-2013, 08:09 PM
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Great looking car and great results. Should be a ton of fun to drive with that HP to weight ratio.
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Old 05-23-2013, 08:27 PM
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Brian,
We'll see when I drive it. The car previously had a k277200 with hand ported and polished compressor cover. It was a great turbo but I just wanted to try something different. This turbo is very similar to a gt3582r and leaves me room for a future EFI build. I am hoping that the transient response/ throttle tip in is improved with the ceramic bearing. Guess we'll see.

People are always asking for a dyno chart on a garret type turbo on a CIS 930. Here's more data for the masses...
Old 05-23-2013, 08:33 PM
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Dyno video

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Chris Carroll
TurboKraft, Inc.
Tel. 480.969.0911
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Last edited by TurboKraft; 05-24-2013 at 02:24 PM.. Reason: video embedding not working
Old 05-24-2013, 02:22 PM
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Awesome car
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Turbo powa!
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Old 05-24-2013, 02:29 PM
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This car is really, really cool. It take just one look at the bodywork and you can tell a lot of effort has gone into it to get the details right. No waves in the fender flares, consistent fastener spacing and gaps, smooth finish in the fiberglass, etc.
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Old 05-24-2013, 02:47 PM
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That car is hot! Love the fender flares....awesome work...enjoy it good health.
Old 05-24-2013, 05:26 PM
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Quote:
Originally Posted by RarlyL8 View Post
Great looking car/engine but I don't see where the turbo did any better than a K27-7200. The dyno graphs of my old red rocket look nearly identical at stock boost level. Am I missing something?
+1. I was considering alternate turbos - but with a similar spec (CIS, SC cams, GHLs, Kokelyn), my K27/HF made 370 @ .8 bar. With a late-style factory RoW muffler:

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Old 05-25-2013, 09:19 AM
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Quote:
Originally Posted by Miguel Antonett View Post
..."As you can tell, she is pig rich in the mid range..."

That's from where most of your power (3K ~ 5K rpm) is coming from; if you lean it down, you might see that "juice" drop significantly.
It's the opposite. He'd start nudging 400 whp at 11:1- 11.5:1 afr.
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'91 964 Turbo
Port matched, SC cams, K27/K29 turbo, Roush Performance custom headers w/Tial MV-S dual wastegates, Rarlyl8 muffler, LWFW, GT2 clutch & PP, BL wur, factory RS shifter, RS mounts, FVD timing mod, Big Reds, - 210 lb
Old 05-28-2013, 03:52 AM
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That is beautiful, and a cost effective alternative to the K-series turbos. Thanks, RSRFan for the purchase, and you Porsche looks and sounds fantastic!!

Chris, I will be calling you soon, as I need to purchase some parts from you. Have a great one.

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Old 06-10-2013, 10:27 AM
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