tconn

Rob, I'll be happy with 350 rwhp. If you can't put the power to the pavement
why have it. just my .02
David , John says that if the pump is isolated well it shouldn't be that noisey.
How is the beast running?

MR951

http://www.darklightning.com/gi/951fp.htm

I'm going w/ the 928 GTS pump. A little bit more capacity than the LR one at about the same price. Sufficient for a Vitesse Stage 2.

hosrom_951

Lindsey sell the Bosch HV fuel pump:

That is more than enough than you would ever need, and for $169.95.

RolexNJ

That why you need to get bigger tires and put it down. If your goal is only 350, you will be fine though. And you have some nice mods too. Good luck with everything. And now, crank that sucker up and make some "big power!"

RolexNJ

Hos: I dont know if that "VH" one they sell now is their orginal Mercedes upgrade or if its the 928GTS. They don't clarify that at all. So only they know. I orginally had their upgrade Mercedes one, and while it did work for my dyno runs; it wouldn't have been good for sustained usage. Being able to support 504 RWHP is one thing, but over a long period of time and "sustained" use, I really, really question that. Hence, why I upgraded to the #044, to cover my bases. Best move I ever did.

TRWright

I would STRONGLY recommend spending a few extra bucks and AT LEAST getting the 928 GTS pump. . .

Now if you have a fairly stock car and your FP dies, maybe look into that MB pump as a replacement.

pole position

In order to make such a definite statement indicates that you know the exact flow #'s of both pumps. Would you mind sharing that with us ?

TRWright

No trolling to do on the 911 boards tonight, 'pole?'

That MB pump is rated at 128 liters per hour at 5 bar (max). (The STOCK 944 turbo pump flows 130 l/h @ 3 bar.)

The 928GTS pump is rated at 147 liters per hour at 4 bar (max).

hosrom_951

I posted the above because i wouldn't need a 044 pump, since my goals are not so high, even that HV pump from Lindsey (supporting 460whp) would be exceeding my application, but that is what i would upgrade, since it did support 460whp (from Lindsey) and the price is very well suited as well.

Besides, everyone should be replacing the stock pump is they still have one, since mine runs weak when i have low fuel, and they are old and probably are not performing the way they should be. This HV Bosch unit is cheaper and better flowing (for HP goals) than the stock unit.

tconn

The Lindsey Bosch HV is a good stock replacement pump. Follow the link provided by Darklightening and you'll see the HV is only good to 400 crank HP.

The GTS pump would do but it costs almost as much as the 044, so it's a no brainer for me. I'll be getting the 044.

MR951

Where'd you price out the GTS pump? I thought it was 'bout ~$180-190 just a little more than the one LR sells.

If it is closer to the price of the 044 then I'll go that route. I liked the GTS pump because it was cheaper (so I thought) and is almost the exact same size as the stock pump so fit is not a problem (no adapter like the 044, no wrapping it in extra tape to build up the diameter like the LR upgrade).

MR951

Click on the link I posted above (post #17). Good info regarding ratings and dimentions of the pumps mentioned.

tconn

I looked at Pelican Parts and a couple of the 928 parts sites. The price was between $260 and $ 280 . Wear did you price it?

Dave E

O.K., so more fuel is needed, but isn't the system limited by the smallest diameter in the system? A high flow fuel pump won't do anything if the regulator is the restriction, for instance...Where are the bottlenecks, and at what flows do they become a problem?

MR951

I think Myswiss had it for less than $200. I could be wrong and have not been able to verify it is the GTS pump based on the product numbers on his website. If the GTS pump is over $250 then I'll be getting a 044 from Vitesse.