951 Write-Up

[EMBPilot]

Originally posted by CJFusco
.... but to really get it going you must floor it; the final 5% or so of pedal travel seems to kick the throttle position sensor into "bat***** crazy" mode. ....

great write up!! congrats and good luck! what an awesome interior!!

[onZedge]

Sassy !!

Now, don't you ever ask the "how do I turbo my N/A" question again!!

You know the answer.

[Eldorado]

he'll be asking how to n/a his turbo...

[AaronM]

Originally posted by Eldorado
he'll be asking how to n/a his turbo...

That's easy. Pull the plug on the turbo's cooling pump, then run the engine hard and immediately shut the car off.

[CJFusco]

Now THAT would be a gutless engine.

[J1NX3D]

beautiful car CJ, i prefer that colour to guards red any day ( not that guards red cars aren't nice!).

good luck with it! May the force(fed) be with you!

[AaronM]

Originally posted by CJFusco
Now THAT would be a gutless engine.

If it's really bad below 3,000 RPM, I would have someone re-do all the vacuum lines and check the O2 sensor (a bad O2 sensor might also cause the little bit or roughness on start-up). When I'm not wringing mine out, I shift at 3,000 RPM and really as long as I keep it above 2,000 RPM I have enough power not to feel sluggish when I'm just cruising. I'll run it at 25 mph in 3rd and she's fine with it on flats.

One thing I would really recommend is a combo vacuum/boost guage. I pull between 19 and 20 inches of vacuum at warm idle (17-18 inches at cold start-up) with fresh vacuum lines (thanks Gerber!).

[CJFusco]

Well, it's weak, but it's not unbearable. I mean, I suppose it feels like a "normal" car under 3K... the contrast between off-boost and on-boost is pretty drastic.

[AaronM]

Originally posted by CJFusco
Well, it's weak, but it's not unbearable. I mean, I suppose it feels like a "normal" car under 3K... the contrast between off-boost and on-boost is pretty drastic.

OK, that's pretty normal then. Just wanted to make sure. Vacuum leaks are easy to miss, common, and cheap to fix.

I still recommend finding a way to plumb in a vacuum/boost guage, it's handy for troubleshooting and a mechanical guage is much more useful than the guage that's mounted in the tach. Mine is mounted just below the radio.

http://pics.zenmervolt.com/951/P6270281_Custom

[CJFusco]

I looked at your dyno charts on that site; pretty impressive. What mods are you running?

Also, how difficult is it to install a boost guage?

[p2ii]

Sweet car. We have similar taste.

[CJFusco]

very nice!

[AaronM]

Originally posted by CJFusco
I looked at your dyno charts on that site; pretty impressive. What mods are you running?

Also, how difficult is it to install a boost guage?

The dyno run there was done by a previous owner, I'm fighting knock above 5,000 RPM at full boost, so I'm not getting those numbers right now unfortunately.

Mods done:
Guru chips
Guru "Accuboost" (similar to the LBE)
3.0 Bar fuel pressure regulator
K26/8 turbo (same as used in the 944 Turbo S models) set to 16 PSI when those numbers were posted, currently 14 PSI

I'm thinking that I will try next replacing the Guru with Vitesse chips, as that has solved the high-RPM lean-out for many. I have a spare set of Autothority chips too that I need to get around to testing at some point.

I also had the european driving lights installed and use H4 headlights, but that's because I like being able to see at night. Interestingly enough, I get more light from 55/60 H4 bulbs than from the 80/100 bulbs that the PO was using because the voltage drop was so large from the draw of the 80/100 bulbs that they were only getting about 10 volts instead of 13.2.

As for installing the guage, not too hard, there are plenty of places where you can piggyback a vacuum line, then you just run it through a convenient hole in the firewall and route it under the dash to the guage. There are places all over that sell mounting pods and guages for the 944. For lighting, just piggyback off of the radio's power line. It won't hurt the guage to be lit all the time.

[CJFusco]

Well, I spent a little time tonight giving friends from work a few rides in the 951 (we've had very mild "winter" weather so far...).

The Porsche 951 is simply ridiculous. I still can't believe the accelleration, the stability at speed, the confident cornering. It's just fantastic.

Until I drive a new-ish Porsche, the 951 will almost certainly be the best car I've ever driven.

[hughett]

...."If I was to make an analogy, the 944 is to a MG as the 951 is to, well, a 928..."

What? A 928? You must mean a Miata!

H2
Owner of two 928s and one 968 (but lusting a good 951)

[hughett]

Originally posted by CJFusco

Harvey, do you have any pics of your stable?

[hughett]

My latest...'88 S4 928 w/40k original miles....I'm the second owner. 5-speed.

H2

[CJFusco]

Originally posted by hughett
...."If I was to make an analogy, the 944 is to a MG as the 951 is to, well, a 928..."

What? A 928? You must mean a Miata!

What I mean is that after the 944, the 951 feels like a comfortable, smooth, and accomplished grand tourer. This isn't a knock on the 944, but you can definitely tell that the 951 was in a very different price bracket.

BTW, most of the pics you posted didn't work. Might want to try editing the HTML...

[ERAU944]

i agree with the miata comment!

i can't tell much of a difference between the 944 and the 951 in terms of comfort and smooth-grand-touritude... except that in the 951 my head occasionally touches the headrest

[CJFusco]

I'm still not sure what is meant by "the miata comment"...