924Board.org

[ic932]

looking at a 951 crossover pipe with this discussion in mind, i'm struck by it's large diameter and it's length...it's actually suprisingly short when held in the hand.

[Raceboy]

Gee, Porsche (and every car manufacturer in the world) is considering cost in EVERY single aspect of the car and that includes Carrera GT etc supercars.

951 was no supercar per se and with moving turbo to the intake side was the easy move sacrificing response a little but it dealt with the space problems.

When doing from zero, on our cars Steves location is by far the best.
_________________
'83 924 2.6 16v Turbo, 470hp
'67 911 2.4S hotrod
'90 944 S2 Cabriolet
'78 924 Carrera GT replica
'84 928 S, sold
'91 944 S2, sold
'82 924S/931 "Gulf", sold
'84 924, turbocharged, sold.
http://www.facebook.com/vemsporsche

[DutchPug]

Hi Raceboy. Of couse i have seen your conversion, liked the simplicity (speed it can be made) of it.

My top priory was spending the least amount of time on it , then reliability, then cost, then performance. Plan still is to have the 5 cylinder in the car (hopefully in a half year or so).

Did think about a remote mount turbo for a second, since i have not done one of those before. But it would have been more work in the end and the results wouldn't be on par with this.

The 924 engine angle makes life hard when you want an 'ultimate' setup. I would start with tilting it back up so a nice manifold together with the turbo can fit where it should be; keeping the hot and cold engine parts separeted as much as possible and introducing as little as possible heat in the engine bay. But... in the end you would still have our 2L 8v engine in it

[Scorpio]

Anyone have links to steve Bass's build? wouldnt mind seeing his setup
_________________
1979 NA
MS1..EFI..
GARRETT T25 TURBO
BILSTEIN SHOCKS
GT BASED CUSTOM BODYKIT

Brisbane , Australia
Think mean think fast
all youll see is
my Porsches Arse!!!

[Martijnus]

[ideola]

Steve usually refers to his build as "Project SkunkWerks". A search on "skunk*" with "bass gt" as the author returns these:
http://www.924board.org/viewtopic.php?t=26219
http://www.924board.org/viewtopic.php?t=26424
http://www.924board.org/viewtopic.php?t=22094
http://www.924board.org/viewtopic.php?t=24416
http://www.924board.org/viewtopic.php?t=25311
http://www.924board.org/viewtopic.php?t=23865

Bunches of photos here:
http://picasaweb.google.com/streetlegalporsche/SteveBassingtonS931
_________________
erstwhile owner of just about every 924 variant ever made

[Joes924Racer]

hmm heres a another way to go ( aside from mega squirted efi) i like the idea of going turboed just as much on a stock engine.. very nice work too. makes it look easy.. big horse power gains too. I like it & so does Mikey ( just like the commercial !)
_________________
1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.

[Martijnus]

[Joes924Racer]

No i meant the post was jus addin my 2 cents worth.
_________________
1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.

[ideola]

[Martijnus]

[DutchPug]

Well, put her on the dyno today. The dynapack dyno's are run or break regarding driveline parts since there are no tires to slip; meaning a real test for the clutch.

Very soon, after a bit of fiddling about, the clutch gave in still at 0.8 bar

Did manage to do a full run at just a tad under 0.8 here the result;



187 rwhp so around 220 hp at the engine. The dotted lines are what it made NA. Nice to see the engine has won right from 1500 rpm on.

So, this means upgrade clutch time .

The power goal for the engine has already been reached... however, have gotten a bit greedy so upped the goal to 230 - 240 whp

Clutch suggestions for this power level are very welcome since i have no clue what is available for these cars.

[ideola]

Wow, impressive, especially the consistent gains right from idle through red line. Nice!!!

As for clutch, your best bet (cost and effort notwithstanding) would be to convert over to a hydraulic 931 setup. You'll need clutch master, clutch slave, brake master (although you could adapt your existing one...), torque tube, a gearbox from a 931-924S-944-951 (cuz you'll need the larger input shaft), flywheel (why not go with an alu fidanza!), pressure plate, clutch disc, and 931 bell housing. Not impossible, but not cheap or easy. But if you went this route, this would open up the option of using the 915 hybrid pressure plate, which gives double the clamping power, and you can then combine that with any number of clutch discs for the 931 or 915, which can offer even better grip than stock Sachs.

Not sure what upgrades are available in an NA config...
_________________
erstwhile owner of just about every 924 variant ever made

[Raceboy]

I wouldn't bother with converting to 931 etc hydraulic clutch. It's NOT worth the time and effort unless you are going 2.5liter engine or 500+hp.

I've used SPEC Stage 3 clutch kit for 924 NA and that holds up to 400Nm of torque and it didn't slip a notch during almost two seasons. That included countless number of hard launches and other spirited driving.
It costs 472usd, not much if you ask me.

Though, after changing clutch you will break trannys with hard launches and 220-240 whp will do it very often with just pushing pedal to the metal with 2nd gear.

EDIT: Ask me how I know this (hint: in past two years I've gone through 4 gearboxes, two 4spd and two 5spd).
_________________
'83 924 2.6 16v Turbo, 470hp
'67 911 2.4S hotrod
'90 944 S2 Cabriolet
'78 924 Carrera GT replica
'84 928 S, sold
'91 944 S2, sold
'82 924S/931 "Gulf", sold
'84 924, turbocharged, sold.
http://www.facebook.com/vemsporsche

[Raceboy]

Just for comparison, here's my dyno-sheet:


208 rwhp/195 rw ft/lbs (265NM) at the wheels. 1 Bar of boost.
_________________
'83 924 2.6 16v Turbo, 470hp
'67 911 2.4S hotrod
'90 944 S2 Cabriolet
'78 924 Carrera GT replica
'84 928 S, sold
'91 944 S2, sold
'82 924S/931 "Gulf", sold
'84 924, turbocharged, sold.
http://www.facebook.com/vemsporsche