928 Performance Mods You Need To Make.
 

I was thinking at work this would also be a great thread to have here.

Along with Engine Performance Mods please including Suspension, and Braking modifications you may be making, or have made.

Don't forget Lightness=Quicker and better Handling

As aircooled 911 owners know, (especially late air cooled 993s) you could spend $20k just to get another 20HP out of those motors. I'm not kidding.

Our 928s make bigger HP gains for much less. :)

I'm thinking start with the windshield wipers ....

Lol, I am wiped out on the wipers.

Here is something that worked well for my US 1983 S, much better throttle response and noticeable power increase: http://forums.pelicanparts.com/porsche-928-technical-forum/750209-us-4-7l-air-flow-not.html

Also for a great tune up to motor, suspension and brakes; lose some weight! Not you the car.

Suspension! Either update or replace, if your car is on its original equipment, punt.

fraggle, i know you have a bad-ass and set-up 928, please share what you've done to it here when you have the time. Even a simple break down of upgrades would be very informative, a pic or 2 also please.SmileWavy
I am interested in your Porsche.

Two bits of advise, get your 928 running as close to perfect in stock trim, sharpen up the focus on what your goal is, what your intended use is. Whats expensive in any hobby is changing directions or taking small steps. OTOH with small steps you can slowly figure out what you like, big steps and changing your mind costs more.

Good start for most people is a top end refresh and new exhaust. Get rid of all the vacuum leaks and misrouted lines, and drop in a set of 85/86 manifolds with an X or Y, high flow cats, and high flow muffler.

I'd leave suspension to the last as you aren't really going to be testing the limits of the suspension until the rest is working well.

Have already removed the spare tire, jack, tools, rub strips, headlight squirters, rear bumperettes, door locks, rear wiper arm and assembly, heavy insulation replaced with lighter insulation, sunroof cassette, rear muffler, and swapped in aero mirrors, 8" H4's and euro driving & fog lights. LS3 motor with lighter A/C compressor and alternator, and 6spd Z06trans/diff/tq tube with a MGW short shifter and of course the Piranha Bros 6 spd conversion kit. Estimating this OB should tip the scales at approx 2975 lbs. Power should be right at 560 crank hp. Have already installed a lightweight billit flywheel, stage II clutch, pressure plate and t-out bearing, all aluminum radiator, dual electric fans, chrome moly axles with H.D. C/V joints, Wilwood calipers, Cayenne rotors, Weltmeister springs, Koni reds, and Fikse rims mounted on Conti Extreme's all around. Plan is to keep the the original OB look while combining modern day sports car performance. Just Peachy coming your way soon. Thttp://forums.pelicanparts.com/uploa...1371677576.jpg
http://forums.pelicanparts.com/uploa...1371677641.jpg
More here: http://forums.rennlist.com/rennforums/928-forum/663881-just-peachy-ob-project.html

Tony that car is going to be a monster on the track, and on the street I don't want to guess.

Sure will, I don't think i would want to risk damaging it on track though.
Man that thing is going to be fun.

The best of luck with it Tony.

So you feel your 928 is safer on the road with 18 wheelers, teenagers, texters, drunks, and women in minivans? give me a track any day :D

Tony,
Is Just Peachy for touring or sport?
What are your thoughts on a cage?

Chris, Primarily a GT tourer. J.P. will see some spirited romps through the TX Hill country, etc. and maybe a few passes at TEXAS MILE // OFFICIAL SITE // 3 DAYS, 1 MILE: NO SPEED LIMIT. This car will be treated to a pristine original pascha interior removed out of a wrecked, low mileage 79. Never intended J.P. to be a track car so that's a no on the roll cage. Thanks for asking. ;)Thttp://forums.pelicanparts.com/uploa...1371738982.jpg
http://forums.pelicanparts.com/uploa...1371739000.jpg
http://forums.pelicanparts.com/uploa...1371739012.jpg
http://forums.pelicanparts.com/support/smileys/wat6.gif

I've heard pascha fabric is again available, can't see 34 year old cloth wearing well.

This is the pristine Taz interior.
Should be good for as long as Tony wants it.
Cool that its available again.
Wish they'd make the green for #1 car.
Whatever happened to Paul Champagne and that lasered pasha leather seat?

Tony, J.P. is amazing. Am a big believer, nicest save of parts/cars EVVVAHHHH.

Car looks better w/o cage, and is safer for street (no helmets / bars are quite unsafe).

The 79 brown car was stored in a climate controlled garage all of it's life and as a result the full interior and wiring harness are like new and will be used in J.P. (Pics below)

Thank again Chris, your one of J.P.'s biggest fans. :DThttp://forums.pelicanparts.com/uploa...1371770067.jpg
http://forums.pelicanparts.com/uploa...1371770083.jpg
http://forums.pelicanparts.com/uploa...1371770101.jpg
http://forums.pelicanparts.com/uploa...1371770116.jpg
http://forums.pelicanparts.com/uploa...1371770260.jpg

You make a good point.
I was hit twice in my Carerra, 1st (rear ended) woman piloting minivan and holding a phone when she jumped out,
2nd was a Jimmy John's delivery Boy (about 18).

I was thinking if he spun it / ended up like Riber.:(

I was also thinking with 570 HP at crank,

Just Peachy is going to be as quick as a 450BHP 959 or even a 450 BHP Ferrari F40.https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&cad=rja&v ed=0CDAQFjAB&url=http%3A%2F%2Fwww.heavy.com%2Fmoto %2Fmoto-video%2Fmoto-video%2F2011%2F07%2Ftop-gear-porsche-959-vs-ferrari-f40%2F&ei=8JjDUejDE63B4APbzICoDA&usg=AFQjCNGJTEwQK rqCYL_zPSoEwax75Ejdsg

That's pretty darn cool. sorry about the sloppy link above Leo i tried..

I'd go for the F40 over 959

Never get sick of that interior Tony, as nice as any new car to me. You're a lucky man. I think the blue pasha is available too on German ebay.

Part of owning a 928 is dealing with the fact your baby might get bumped, might need body work or a respray, might need a new chassis.

I spent half my life working with fabric, but don't really understand too much about various longevity issues. Some old stuff seems fine, some just crumbles after a little use.

Having worked in a upholstery shop in my early years and from info gathered, IMHO it depends on fabric & stitching-natural vs synthetic, and the environment (time, sun, mold, etc) that interior's are subjected to. Only thing that needed fixing on interior of J.P. was having the front seams on the seat bottom cushions reglued (& stitched to hold up) properly (re: Paul Champagne). This was a weak point in many of the early models. It's looking like this older synthetic interior will be have many more years of service unlike the all leather interior's on many of the euro models that are subject to the same nuances. The interior of this pristine 79 was the main reason I purchased this car for the J.P. build along with the wiring harnesses and rubber bits throughout the car. Please take a real good look at the pics below to verify what's been said regarding the condition of said pieces;)Thttp://forums.pelicanparts.com/uploa...1371785309.jpg
http://forums.pelicanparts.com/uploa...1371785336.jpg
http://forums.pelicanparts.com/uploa...1371785352.jpg
http://forums.pelicanparts.com/uploa...1371785370.jpg
http://forums.pelicanparts.com/uploa...1371785397.jpg
http://forums.pelicanparts.com/uploa...1371785414.jpg
http://forums.pelicanparts.com/uploa...1371785432.jpg
http://forums.pelicanparts.com/uploa...1371785447.jpg

I've seen in print very old autos (70 years) with original interiors.

If out of the sun and kept at the right humidity interiors can last a very long time.

When Mike made the original comment about 30 year old fabric holding up,

I think he was referring to the 'new' pasha fabric available and that it is really NOS.

I thought the same, is is NOS or really New? probably the former.

What material is the factory pasha? anybody know? Bet Jim Doerr does.

NOS Pasha has been around in limited colors for a price for a few years, this is new production that I was talking about.

Last trip to the UK we went through the Victoria and Albert museum which has big section on costumes and reference collection of fabrics. Unfortunately I didn't retain much of value regarding preservation.

Leather and some fabrics get very brittle when dry, thats about my limit.