MarkRobinson

I've been on the 928 forum for many years, but rarely on this site as I have a few local 951 PCA Racer pro's who have helped me with my cars over the years. My current Porsche garage:

-82 928 5-speed 5.0 Turbo GT2R/S race car
-86.5 928s 5-speed, Turbocharged.
-88 944TS (red on beige/black)
-91 911 turbo (aka 965), with 3.6T conversion

All red, all turbocharged.

My 951S has the following mods:
-Vitesse chip, balanced injectors, adjustable regulator & FP gauge, Greddy EBC & boost gauge, Tial 38, NGK BKR7E plugs, polished-port head on recent top end rebuild.
-Full Boostlogic (custom) 3" exhaust, Magnaflow muffler & tip
-Recently repainted with OE Glasurit Guards Red paint
-Fikse FM5 18 wheels w/black centers
-355mm Brembos (my design) on stock S4 calipers
-My design rear coilovers going on in 3 weeks.
-My DIY Beru ignition wires (avalable through PelicanParts)
-R12 AC system: Ice cold

I love my faster Porsche's but this is my daily driver: love it. My 2nd turbo S & my third Turbo.

In '98 my 944TS had a bunch of Powerhaus bolt-ons: dyno'd 355/345 @ 16psi on pump gas: not bad back then for a 2.5l.

Cheers.

333pg333

Very nice lineup Mark. I've read about your brake setup on Pelican too. Well done.
Not too hard to guess your favourite colour!!

MarkRobinson

Color choice: it is what it is: race car & 951S have been repainted OE color: not sure how they all turned out to be red...wasn't on purpose, but I do like Red.

333pg333

Have you got any incar footage on the track?

toddk911

Nice stable! Ever run them in the Texas Mile?

I loved my 86.5 928S. It was only an auto but still quick off the line.

My current 951 is also getting some Powerhaus stuff; 2.8 stroker swap.

tkrtape12

Wow nice stable of cars...

odurandina

one of my dreams would be to close Bee Caves Road at 3:00 am for some serious road racing.

i bet you could bring something fun to the party.

Stephencs601

I am both 928 and 951 owner. Love the 928 for travel, not designed for racing. The 951 is my Beast. They call it The Hulk. I have so many mods to the car, all I know is it at 15lbs of boost tears up tires. Have to dial the boost down under 15lbs for the road.

MarkRobinson

I drive that 2x a week, 2222 7x a week: love Austin roads!.

ToddK911: what does your car dyno & how'd you calibrate a 90mm MAF to an existing system? I'm about due for an MAF conversion.

Here are a few of my videos (race car was just started, dropped a valve, so rebuilding...)

ausgeflippt951

Wow! Great collection you've got there. Welcome to the better side of life, BTW.

Awesome 928's, btw. Damn they look quick.


I'd love to hear more about that brake setup........

MarkRobinson

I worked with brembo to come up with a rotor/custom 951S hat set-up that would work with the factory spaced S4 caliper. That's what I have: 355mm Brembo ring, custom Brembo hat, floating hardware, 6160 cut spacers, modified pads to fit for full annulus coverage: works great! About $1300 total, but the Brembo Gran Tourismo kits start at about 3k, so this is 1/2 the price & the caliper remains OE Porsche.

Fits with a big red caliper as well (with smaller spacer)

Mark

tkrtape12

Welcome....Very nice...12 seconds..that's quick..

onspeed

You don't happen to go to the monthly 928 meets?

lee101315

That's a serious stable of cars!
How did you mount the turbos on your 928s? Are they rear mount or in the engine bay?

MarkRobinson

Hi there Onspeed: why were you in a Z06 at the last A.S.S?

I mounted the turbo mid-ship, in the gap left in front of the transaxle: so it's abou 4' down past the engine. With 350hp worth of 5.0 engine pushing, the "lack of heat" is not an issue: I have exhaust volume, & the car goes like stink. I've had turbo 928's going on 7 years now: would never look back.
-all the heat's out of the engine bay, & the engine bay is simplified, possibly for a front mounted ic (see pic).
-can still run a catalytic converter if wanted.
-plenty of ground clearance on a 1.5" lowered car.
-sounds like a Murcielago on-boost from inside car.
-makes 407rwhp/400tq at a mere 5psi, I usually run about 6-7psi.
-I still get 17mpg in the city, 25mpg on the highway (better hwy than my 951S)

Mark