Vincent C.

that is it, we had an original, sold it to a customer, then we just started to modifiy them instead, also works on 964 with lfw for stalling....you will need to modify the bellhousing of the trans for it to fit....vinnie

Vince964T

Thanks Vinnie. I had read a bit on the topic on pelican parts definitly something to check out.
However I am not sure net net what it does to engine longevity on a track car. Having it a bit late is probably safest even if it means combustion is not as good ? I m really clueless.

Keep in mind it's track only.

Metal Guru

This has me perplexed also.
Vinny, help me understand how this mod works.
Generally, retarding ignition closer and closer to tdc increases power. That's why twin plugging is preferred: the flame front has a shorter distance to travel with twin plugs, allowing ignition even closer to tdc.

turboholic

Vincent C. which Turbo do you use to achieve 460hp @ only 0.9bar? Very impressive

turboholic

do you have a link to the Pelican thread?
I searched but couldnt find it, would like to learn more

Vince964T

No specific post.
When I got the dyno result on my car I made a few searches, espcially on Power loss. Timing issues popped up a few times.

Vincent C.

one thing that we don't do on stock configuration 964 turbo car's is set of the ignition, its done through the famous control unit in the engine compartment, when the car comes on boost, the control unit backs the timing out if the car for safe running, have found that more boost, it wants to take more timing out of the motor, porsche seems to be very conservative in making power though the ignition control unit. you can easily add a little timing with the modification. it won't let the control unit take so much timing out on boost. if you own a car with a euro fuel system and only .9 bar of boost, this works great....i run a special built garrett turbo....vinnie

cobalt

I know of someone who has done this before on a 3.3l. Although he had issues with his AFR's even after installing an Adjustable WUR. How do you resolve the lean condition?

Here are the charts from his car and the numbers appear to be quite similar.

PorschePhD

I have to say that with these mods that the cars should be close in the HP department but the TQ should be more than the GT3 and the range should be lower on the powerband than the GT3. TQ is what should pull on the car and HP will sustain it. I have driven many GT3s and they are gutless on the TQ until the upper RPM ranges which the turbo should have already pulled on.

cobalt

Stephen,

You have been missed and your input always insightful. Hope things are improving for you.

PorschePhD

Thank you for the kind words Anthony. Everything is just like at a standstill. Really weird!

turboholic

with above AFRs I hope your friend doesnt track his car...

cobalt

Believe it or not it is a dedicated race car used in the most grueling conditions. (high heat & high humidity) I am surprised he hasn't blown that engine up several times over. Although I haven't spoken to him recently.

Vincent C.

does that car have a euro fuel system and how much boost does he run??? at this point, very fine tuning plays a big factor...well tuned car, dialed in fuel system, good pumps, good power to pumps, hopfully not much blow by, not running dirty air back into the motor, fine tuned timing, the list can go on of course...

cobalt

Never got that involved. Maybe these pictures could tell you more but they aren't pretty. I do know he was working with Brian Leask on earlier versions of his WUR and IIRC he used Stephens fuel head mod. He was always changing something on the car.

I have been told by so many that CIS cannot support these numbers but I know he did don't know what life he got out of it.