Imo000

No I don't think that, but I sure wouldn't take a huge loss either. But that's just me.

If I remember right, it's wasn't really your choice to sell the Goldmemeber at a loss. You had no choice but to sell it at whatever you could get for it.

If you really want to do this as a business, I suggest you come up with a sound business plan. You can't just charge whatever you want for your product and expect the customers to just pay for it. Especially when there is already a turbo kit just about to be released at a fraction of the cost. Your kit might be superior, but his is waaay cheaper and if money wasn't an object, most of us would rather be driving a '95 GTS, 5-speed.

Tim Murphy

My injectors will hit 100% at about 9 psi and 6000 rpm. If you checked both of our MAF voltages we most likely see they are very close when the injectors hit 100%. I don't have my fuel pressure data logged but mine actually increases as the boost goes up. Since your boost stays the same it can only be pre-set to a certain value and then as the rpm's increase so does the fuel consumption and your fuel pump is running out of steam, as you can see. If I had my pump data logged you would see the pressure continue to increase with rpm. There is a limit though and I think I'm right at it. On my other car that I run 18 psi I have 2 pumps in series to increase the HP of the pump so I can run more pressure (150+ psi). There again I increase the fuel pressure with respect to boost. You should try a Kenney Bell "Boost a Pump" and increase the voltage to the pump at a set boost level and see if that would help.

Your going about it the right way Tony. The data logging is the only way you know what is going on, other wise you are just guessing. I don't mind discussing this kind of stuff in an open forum because I think people should really understand what they are getting into and how things actually work. Many claims go uncensored because of the judicial system of the board and that is a shame.

From here we should take it outside. I don't want to hijack john's thread any more than we already have.

Tony

John who?

Thanks for the input. A Boost-A-Pump was on my list to try...just havent gotten around to it. I was thinking i may be running out of ommphff in the pump. I wish i had a fuel flow gauge. Im sure i can find one

Yup, sorry for the slight hijack John, but perhaps you can snag some BTDT stuff from all this.

As for taking it outside...in about a month you wouldnt catch me outside up there

Bill Ball

Tony:

Why aren't you running 30 lb injectors?

Tony

Running fine with 24s right now.
I originally had the 30lbs in there but it was WAY too rich and a real lumpy $hitty idle...I took the 30s out and basically refurbished the manifold sealing all the leaks and put the 24s in to try it.....they ran fine so i left them in.
In all honesty i never gave the 30s a try after i sealed up the maniflld leaks.

the 30s will go in a couple of months along with smaller pulley Id like to hit 425-50 rwhp range.

I just added an Lomas Xpipe so i may have gained a littel over my H pipe?
I know i gained a much better sound! Really sounds nice under full tilt...bit of a drone at cruise but not bad. Does sound good though, thats for sure.

Did you get your intercooler yet Bill?

Anyway...
John, On the subject of turbos. I was looking at my Cat bypass H-pipe sitting in the corner after being replaced by the X, and was wondering why dont you just tack up a jig for one of those and add the turbos right after the headers?
It sure would save a $$$$hitload of work and money making new headers?

granted, they are not on the headers, but how close do they really have to be?
Seeing the performance from the rear turbo, a set of turbos mounted where the stock headers end should really show some potential. I wish i had a set of turbos id try it myself.
Just wondering...

TAREK

Tony,

That's my plan for the superwidebody. Rear seats will be deleted to make room for the turbos without compromising clearance. Will have to re-weld metal covers for heat shielding of course...I'm still playing with suspension and electric power steering though...so it will be a while before I get to it.

Herr-Kuhn

The single turbo option is not as elegant. Additionally, might I suggest some of the following technical drawbacks:

A. It puts all of the heat input for the same HP into one turbo, thus shortening turbo life.
B. Using the stock manifolds puts the turbo low down, far too low for my preference.
C. One medium diameter output and intake pipe run offers more restriction than two smaller pipes
D. In the space available, it is hard to fit a really large turbo and run large intake piping, etc.

The twin allows two smaller quicker spooling turbos to be used, but the real benefit is in the flow path optimization with twins and splitting of the thermal loads. You all whine about underhood heat with the turbo (it isn't that bad with twins), putting all of the thermal input into one device makes the heat load in that area very high. Additionally, a lot of enthalpy is lost in the cross pipe from one bank to the other. I do believe a single can make the power, but in my mind the 928 is clearly worthy of twins. Porsche employs this technology on engines under 4.5 liters as well as into the sub 4.0 liter range. Clearly there are benefits and Porsche has seen these benefits.

My $0.02

B/C...Time will tell exactly where this project goes. There is plenty of potential with my plans. Right now I'm knee deep into my 4.5 twin. I had forgotten what a PITA a cam change is on a 16V car. Stupid design on the cam housings, cams shoud bolt into the head and have a "valve cover". ANy of you ever swap cams out? I've found you can freeze vasoline to apply to the lifters for assembly...this keeps them secure in the cam housing for install. I wasn't about to pull my motor for a cam change.

IMO...I receive regular calls on doing these conversions. There are people who will pay for the ultimate setup. Like I said, I'm not about cheap and quick make a buck. People still drop $30K on a stroker setup, etc. My job pays me plenty and I am very fortunate to make what I do now at 35 years of age. This is a side hobby that I can see building into a small business sometime soon, but I don't see this replacing my income now...maybe 12 years ago, but not now.

m21sniper

Vs a twin turbocharged S4?

Pffft..........clearly you've never driven a top end turbo car.

Imo000

Snipe, that’s not what I meant. For me, if money wasn’t an object and I still want to drive a 928, the choice would be a ’95 5-speed. Then I would start the modifications from there!

Herr-Kuhn

IMO, so which side of the fence are you on?, the "inexpensive" or "all out"? You can't swing both ways on the subject. But I know, you just like to stir the pot like the rest of the guys, right?

bcdavis

Everyone wants the other guy to go all out, and then sell a kit to them for $3000.

Jim_H

I was planning on $2750...

Imo000

Ohh…. I’m pretty sure you’ve already figured out that I’m defiantly on the inexpensive side of the fence! I just hate to see you build the ultimate TT kit and at the end no one will be able to afford it. This would be disastrous for both, you and the 928 community.

Imo000

………….AND unlimited FREE 24hr customer support (Toll-Free of course) backed by a LIFETIME of warranty.

This is one of the main reasons why I’m not contemplating to manufacture my ultra low budget SC kit. Customer service is an art that requires patience and nerves of steel.

bcdavis

Yes, but 928 Turbosports is already marketing a low-budget turbo kit for the 928.

So knowing John does good work, I would rather see him prove his point to the rest of the 928 community, about how fast a turbo 928 can be, rather than put out another product like Goldmember, that no one respected, because it's dyno numbers were so low compared to the supercharged s4s. If he does a cheap and mild turbo setup on that s4, it's going to be right in the same ballpark as the supercharged cars, and in the same ballpark as the 928 Turbosports kit. But expensive as hell. If a turbo kit is going to be expensive (which it is), then it ought to be putting out 500+ RWHP like the MURPH cars...