I want more power

[rockclone]

I am trying to gety as much power out of my 928s its a 84 can u guys give me ideas? Thanks,,,,

[77tony]

What's your Budget ? T

[lfausty]

lol....u watchin too much tv? the superman movie isn't reality,

more powerful than a locomotive, faster than a speeding bullet, able to climb in a single acceleration.

pcar "that aint superman" its me!

[harborman]

Maybe you need to put a deposit down on the new Porsche 650 HP Boxer 8. It will have 8 cyl, 4 turbo chargers, 2 intercoolers, 4 adjustable cam shafts and 3.9 liters. Will do 0 - 60 in 2.5 seconds. Weigh under 3,000 lbs. It will be known as the FEFI, Ferrari fighter!

[Pete R]

I'd like a hotter wife.

[Landseer]

^^I've thought about it, but am already bumping against a DIY service limit, in a sense.

This weekend saw a 951 at autocross. Had modern Corvette powerplant. Ungodly.

Can't imagine what a 928 would move like with that powerplant. If you've got a significant budget, talk to Tony.

[Danglerb]

948 is a fast car, not sure its that much of a keeper though.

[Fixer]

US 1984 S; added throttle response and power in an afternoon (and free):US 4.7L Air Flow or Not to

Also Lighten your car! To me this Is the Porsche hobby. Once you get into it, it's very fun. Look at the RS,RSR of '70s and RSAmerica of '90s 928 CS.

Early '70s 911 RSRs had 330 BHP and weighed about 2000 lbs. The beat high HP Prototypes on the track routinely. under 7 lbs. per HP!

Power is relative to Weight.

[Landseer]

Originally Posted by Danglerb

948 is a fast car, not sure its that much of a keeper though.

My focus is shifting slowly toward it, though.

I've got a 951 in my sights right now, hoping to hear this week if its available at a reasonable price. I really miss the 944 that I was driving. The 951 that I was maintaining for one of my kids was incredible fun. Time for a change. Based on the V8 versions I've seen, and the transformation of all that old GM iron with new powerplants, I think its a viable long term path.

Am also interested in seeing the results of Tony's project, the orange car with the new gen powerplant and trans.

Doesn't make a lot of sense to me to try to hotrod the 928, esp. mid year cars. I've got Jim's 84 Euro, with about as much cursory modification as possible to optimize speed, shifting and stopping. 85 brain, Porken 16V'r, Porktensioner, adj fuel pressure, S4 suspension, some special springs and Bilstein shocks, 86.5 transmission w/limited slip. Yes, it has a lot of miles which takes the edge off, I'm sure. But, all in all, at end of day, it's a 928.

[Fixer]

But, all in all, at end of day, it's a 928.

Translation: Old technology and a bit Heavy, but the Heavy is the drawback to an early/mid 928 with 928 motor.

My 250HP 911 that weighs just about 2500 lbs is super quick and very nimble
(because it's about 10 pounds/HP)

10lbs/HP should be everyone's goal. It is doable but with a later 32V car without using a saw jaw..

At 3150 w/o my butt in car, my basically stock '83 S 5-speed 928 is definitely fun and plenty enjoyable. Simplicity of the early cars appeals to me, I am still making it lighter, goal is below 3000 lbs. and I will install euro spec cams & 1985 exhaust manifold.

944s are not particularly light cars and have the same general layout, their motors are half of a 928.

But the 944Turbo can and does make big power for its displacement.

The difference must be the 944 intake design only, and this has to be the limiting factor with the early 928 motor especially US bound cars.
So for a '84 you would need euro heads and intake tubes to start w/ 1985 exhaust manifolds,
928 International has these items from time to time and are affordable if you are serious about gains.

I wish this thread was Started in 928 Performance Mods You Need To Make.

[davetr]

i want $10,000,000 and a helicopter

[Fixer]

I think we have to always remember to appreciate the 928 for what it is (myself included) not try to compare our GTs to sports cars with more modern tech. I went to work late night yesterday eve and when those headlights came on, it just brings you back and reminds what a beautifully made Porsche the 928 is.

944s don't do that for me personally and never have. I drove a new 944 S2 my friend owned back in College (he was injured and received a settlement), it handled great had decent HP but no torque when compared to 28s. 944Turbos have the torque i know, driven them too.But just don't thrill me like they did in the 80's. 928s still do. Maybe it is the 928 design and build quality.

I read Hemming's Sport and Exotic like a lot of you, few months ago they showcased a 3700 lbs. '87 Ferrari Testa Rossa.

'87 S4 was quicker and better all around driver's car back in day. Guess my point is they're old cars now, if you need a lot more performance maybe look into something like a first water cooled 996 911. They are cheap (under appreciated) and great 911s with 300 BHP stock.

But keep your 928 too if you can.

[harborman]

Originally Posted by The Fixer

I think we have to always remember to appreciate the 928 for what it is (myself included) not try to compare our GTs to sports cars with more modern tech. I went to work late night yesterday eve and when those headlights came on, it just brings you back and reminds what a beautifully made Porsche the 928 is.

944s don't do that for me personally and never have. I drove a new 944 S2 my friend owned back in College (he was injured and received a settlement), it handled great had decent HP but no torque when compared to 28s. 944Turbos have the torque i know, driven them too.But just don't thrill me like they did in the 80's. 928s still do. Maybe it is the 928 design and build quality.

I read Hemming's Sport and Exotic like a lot of you, few months ago they showcased a 3700 lbs. '87 Ferrari Testa Rossa.

'87 S4 was quicker and better all around driver's car back in day. Guess my point is they're old cars now, if you need a lot more performance maybe look into something like a first water cooled 996 911. They are cheap (under appreciated) and great 911s with 300 BHP stock.

But keep your 928 too if you can.

I agree. Why spend all sorts of time and money to get more HP out of a 928. It is fun to drive as it is and has plenty of HP for street driving. If you want to go fast in a straight line, buy an American blown and injected Hemi/427 car, 69 Camaro, Dodge GTX, or something.

[Danglerb]

If you want a 948 cheapest way is to buy one, as I say they don't tend to be keepers, people build them, romp around a little, grow tired, bored, or get too many tickets and then sell them. There are without question screamers, but much more like any other common straight line hot rod than a sports car.

Plan for my 85 Euro is to gut it out, no AC, remove LOTS of weight, keep it visually smog legal but run a hot cam and 5.0L bottom end or maybe just right to a bored 104mm or stroked option right at 6.0L. Bored means custom rods to adapt the 968 pistons, stroked adds one of Greg's new billet cranks, but I'd like to keep something of a budget on it and 104mm with the cam I have should hit 350 rwhp. Combine that with 3000 lbs equals fun.

[Landseer]

Exactly, Harborman has it nailed.

Drive, appreciate.

Fixer, I've got the full Euro setup, including a better flowing exhaust with 85 header pipes.

Not worth the time and effort over my old stock 84 USA 5 speed or my 84 USA Automatic.

Best upgrades are 89 trans into 84 USA auto. Second best upgrade was 86.5 shiftable trans into 84 Euro. Rest is BS.

Turbo 944 was huge fun passing cars on 2 lane roads.

V8 in either body style is the only performance mode I'd consider.


No reason to sell any of the 928's sitting here, at least not now.
Intrinsic value is huge --- free transportation, fun commute.
Monetary value is amusing.

[Landseer]

Dangler, what i saw this last weekend was a 948 basically kick the buttocks of most porsches at an autocross event. Seemed like it had wonderful handling, though the guy spun it on the first of 8 runs. Every successive run showed the awesome power and great handling. Not a straightline car, at least not this one. Purpose build race car, starting with a basic 951 and roll cage. Might self destruct, but I doubt it. Not sure what transaxle. Guy slipped into the Tire Rack HQ parking lot, towing it in a closed trailer, hauled by a caddy SUV. Unloaded, kicked ass, packed up, slipped out --- our leader called the guy's name for an award, we looked and saw the tail of the trailer rolling off. Pro build, based on a car with a broken original motor I was told.


If you guys want power, why kill another 928 so you can maybe achieve another 10% performance?

[Fixer]

I was thinking euro spec cam regrind by WebCam for my car.

My car pulls pretty darn nice for a US '83, but i could imagine with more lift and duration it would be perfect for now.

You don't think it's worth doing ($1200+/)? I then would need better v springs and lightweight lifters i would image..

I wanted to do it all this Winter while doing the TB.

I was thinking euro spec cams would be good for 25HP, then i'd find the '85 Stn Stl tube exhaust manifold. From there keeping a look out for Euro intake/throttle body.

Lightening all the while.

The loss of 200 lbs. and the little i have done have already made the car real fun.

Not worth effort/$. I appreciate your opinions. In this economy i don't feel right about wasting $ either.

[Pete R]

My car should be under 3000lbs now. The biggest weight savings came from removing stock exhaust, removing AC components, and using aftermarket seats.

[Danglerb]

If you don't get to look, hard to guess whats under the sheet metal. Years ago I was at Willow Springs for the BMW driving class, and out on the track there was a white 928 spanking everything. What I found out later was that it was tube frame with a fiberglass body, a project from one of the big fiberglass body kit places in SoCal. A purpose built car with good race rubber and tons of power is going to do some spanking.

I have Euro S cams, but sent webcams a set of 81 cams and had them welded and ground to their "hot" profile 5.06 lift (max that fits thru bearings) and 242 duration. They are going to require special springs, at least 951, and I have no idea if I can get the idle to pass Cal smog, but those are going in my next motor.

[Fixer]

Originally Posted by Pete R

My car should be under 3000lbs now. The biggest weight savings came from removing stock exhaust, removing AC components, and using aftermarket seats.

what seats did you go for?

Originally Posted by Danglerb

If you don't get to look, hard to guess whats under the sheet metal. Years ago I was at Willow Springs for the BMW driving class, and out on the track there was a white 928 spanking everything. What I found out later was that it was tube frame with a fiberglass body, a project from one of the big fiberglass body kit places in SoCal. A purpose built car with good race rubber and tons of power is going to do some spanking.

I have Euro S cams, but sent webcams a set of 81 cams and had them welded and ground to their "hot" profile 5.06 lift (max that fits thru bearings) and 242 duration. They are going to require special springs, at least 951, and I have no idea if I can get the idle to pass Cal smog, but those are going in my next motor.

So what about euro S cams, did it wake things up enough to warrant the installation?