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Chain fence eating turbo
 
Join Date: Dec 2008
Location: Austin, TX
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Who's 79 930 featured in CARFIX on Velocity?

Guards red with 996 turbo wheels I think.

Made some good power and was wondering the combo.

Haltech EFI is a nice addition.

Old 10-16-2016, 09:48 AM
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I saw that too. Great headers made by the TV staff. Car did make good power & they were stoked to work on it.
Old 10-16-2016, 11:38 AM
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Chain fence eating turbo
 
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Quote:
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I saw that too. Great headers made by the TV staff. Car did make good power & they were stoked to work on it.
Yeah, the fab work was great. What I was trying to figure out was if those were equal or unequal length headers?
Old 10-16-2016, 12:04 PM
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Chain fence eating turbo
 
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Wished the owner was present to talk about it or the combo was stated. Tuner just states he'll turn up the boost, but to what?
Old 10-16-2016, 12:06 PM
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That guy Jared is the real deal on a TIG welder. Dude has skills.

But like you guys, I would have liked a little background on the car's EFI system.
Old 10-17-2016, 08:14 AM
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Are you talking about the same episode that aired last March, red 930 that got a new exhaust and turbocharger, almost 500whp?
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Old 10-17-2016, 08:31 AM
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Old 10-17-2016, 08:40 AM
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I can't find the link to the video now, but it showed the boost pressure they were running.
Power was right in line with a 930 fitted with bolt-on upgrades, cams, EFI and stock heads.
IIRC that was a Precision turbo, their version of a GT35R.
The setup wasn't as responsive as it could have been, they had some weird stuff going on with their wastegate routing, and the air filter right off the turbo.
Tippy -- no, not equal length.
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Old 10-17-2016, 08:57 AM
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Chain fence eating turbo
 
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Well, if it's not a member, I'll state what I thought.

Unequal length primaries and really bad waste gate circuit left a lot to be desired.

Was shocked Jared spoke knowledge but didn't execute.
Old 10-17-2016, 09:39 AM
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Yeah, I was wondering about that air intake location...I mean, you could mount it under there, but you'd want some serious shielding/ductwork, right?
Old 10-17-2016, 10:01 AM
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Clicky:
https://www.youtube.com/watch?v=fuJdWb0g5oQ
Old 10-17-2016, 10:02 AM
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^^Doesn't show the whole show, just the turbo bits...

Edit to add: At around 3:30 of that video, you can see clearly that the headers are unequal length, but that the waste gate is located at the same point that both banks merge, so that looks OK to me. But what the hell do I know?

Last edited by Mocker; 10-17-2016 at 10:12 AM..
Old 10-17-2016, 10:03 AM
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"You're gonna see fire coming out of the tailpipe, that's cool."
"That's way cool."
"That's real cool."


Am I the only one who hears the voices of Beavis and Butthead when these guys got going?
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Old 10-17-2016, 11:27 AM
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I admit this is one of the better technical car shows. They usually do more than just "bolt stuff on" for their projects.

Now I have to go find the 930 episode. I am usually off doing something else early in the morning when these come on.
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Old 10-17-2016, 11:42 AM
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I'll take your word for it that it's one of the better ones, because I don't watch these shows. Between their commentary and some of the things they do (ex: seeing "an expert" weld a structural part over rust), I find them too painful to sit through. I've got better ways to waste 30 min.


Schedule 40 stainless for the headers, like a lot of the high boost imports use. Very heavy but durable.
Reversed turbocharger (by Magnum) so it dumps out the driver's side through a really short exhaust, WG plumbed into the outlet as well.
Unconventional, but why not? Be different, try something.

So far so good.

"The wastegate is inline with the oil return line, that's not good, it spits fire at it going down the road..."
Um, do you not see the dump pipe directing it outward and away from said scavenge line?

"The other thing I don't like when we look at the top of the engine... ...is the air filter inlet is," saying the air filter in the engine bay is bad. Simply no understanding of how much air gets force fed to the engine bay when the car is in motion. You get slightly positive pressure above the engine sheetmetal.
New air intake right behind the engine, tucked into the bumper, with some shileds and hopefully effective fresh air ducting so it isn't breathing hot air radiating from the engine.


My $0.02: I see a lot of work for not much gain over the previous existing setup of B&B headers and that straight pipe.
Had they displayed the dyno output relative to RPM, rather than vs. MPH, it would have been more useful for analysis and comparison.

We've done plenty of 3.3L 930s with stock bottom ends, sport cams + bolt-ons + EFI with a flat manifold and they usually do right around 470whp at 18psi on 91-octane, conservative tune.
Looks like that car had a Carrera manifold, so likely port-matched heads, too. If so, I would have expected over 500whp at the same boost pressure.
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Old 10-17-2016, 11:55 AM
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Enlightening, as always, Chris. Thanks for dropping the knowledge and saving the hysteria for the TV guys.

I still think that guy Jared is a pretty talented welder/fabricator. He just doesn't know jack about 911s. Not surprising, really.
Old 10-17-2016, 02:02 PM
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No doubt he's got skills. The fab work on that exhaust looks solid.

FWIW: anyone else following this same basic recipe, if you pull the heads for porting to Carrera specs, I *highly* recommend twin-plugging the heads at the same time. You'll love the gains in torque/HP, smoothness, and drivability. Well worth the expense.
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Old 10-17-2016, 02:10 PM
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Chain fence eating turbo
 
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Quote:
Originally Posted by TurboKraft View Post
No doubt he's got skills. The fab work on that exhaust looks solid.

FWIW: anyone else following this same basic recipe, if you pull the heads for porting to Carrera specs, I *highly* recommend twin-plugging the heads at the same time. You'll love the gains in torque/HP, smoothness, and drivability. Well worth the expense.
So what's SC cams, 930 ported to 3.2 heads, 3.2 intake, with supporting exhaust and turbo yield whp wise?
Old 10-17-2016, 02:14 PM
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3.3L with stock pistons and Carrera-spec heads
standard Carrera manifold and throttle body
Modified B&B headers, not even twin scroll
TK free-flow straight-through 3" muffler
TK full-width intercooler
Garrett GT35R
Twin plug
91-octane pump gas

Our very first pull with no real WOT tuning was 515whp.
Final tune was 540whp/515wtq @ 1.25bar
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Old 10-17-2016, 04:15 PM
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Oh, 1bar at 3200rpm and about 270wtq at just 3,000rpm.
Helluva fun car.

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Old 10-17-2016, 04:19 PM
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