David Floyd

</font><blockquote><font size="1" face="Verdana,Tahoma,Arial,Helvetica,Geneva">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Arial,Helvetica,Geneva"> The Lindsey pump is both longer and larger diameter. I used a router to increase the insulator inside diameter </font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Arial,Helvetica,Geneva">Or just use a little lubrication as I did.

Konstantin

so which one has the best capacity and fits the 951? the 928 GTS one the Lindsey one or the Huntley one, or are all the same?
According to Lindsey his support 800 HP. I need one that suports 600 HP

Konstantin

Turbo-Uli

</font><blockquote><font size="1" face="Verdana,Tahoma,Arial,Helvetica,Geneva">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Arial,Helvetica,Geneva">Originally posted by Konstantin:

I need one that suports 600 HP

Konstantin[/QB]</font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Arial,Helvetica,Geneva">A pump for 600 PS ??? do you want to fly to the moon ??

Turbo-Uli

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IanM

</font><blockquote><font size="1" face="Verdana,Tahoma,Arial,Helvetica,Geneva">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Arial,Helvetica,Geneva"> or are all the same? </font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Arial,Helvetica,Geneva">No, they aren't the same. I believe the one Huntley sells is the same as the 928 one, but the one Lindsey sells was original equipment on old Mercedes 450SLC's. This is your thread, have you been reading it?

As mentioned above, the "Lindsey" pump (which I have in my car, fits with limited modification of rubber holder) is Bosch part number 0.580.254.942. The "Huntley" and 928GTS pump is Bosch part number 0.580.464.057 (not positive on this one). It sounds like that pump will also fit in the 951, with limited modification of the rubber holder.

Which one will support the most hp? Don't know for sure, but I've been told that the one I have is a bit beefier than the 928 pump. However, if you seriously need something that supports 600hp, you should probably go with something much more radical, maybe look into something like what Alan C. has got in his race car. With that kind of power, you'll be needing bigger fuel lines and much bigger power leads going into the pump as well.

Bill

</font><blockquote><font size="1" face="Verdana,Tahoma,Arial,Helvetica,Geneva">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Arial,Helvetica,Geneva">This is your thread, have you been reading it?
</font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Arial,Helvetica,Geneva">There are those that say it...and the rest that think it.....LOL <img border="0" alt="[hiha]" title="" src="graemlins/roflmao.gif" />

IanM

Yah, well... I don't want to sound too harsh or anything, but it does take effort to find part numbers and reply to these posts, so you especially hope that the person who started the thread is reading it in detail.

Transaxle

</font><blockquote><font size="1" face="Verdana,Tahoma,Arial,Helvetica,Geneva">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Arial,Helvetica,Geneva">Originally posted by Konstantin:
<strong>.... I need one that suports 600 HP....
</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Arial,Helvetica,Geneva">Come on guy - you're joking ?

David Floyd

The 951 with the 600HP 968 turbocharged engine in the April 2003 Excellence uses a "staged 400HP Airtex pump starting up a Bosch 500HP pump chiming in with boost to fuel 95lb injectors"

Don't know anything about this system, maybe a call to Norwood Performance in Dallas ?

951Racer

IanM - I was talking about your comment about recirculating fuel. The dial-a-flow allows you to lower the amps to the fuel pump thus reducing flow. Personally never found it to be very useful since I am always in need of full flow

For 600hp I would seriously look at something besides Bosch. The Weldon pumps are simply the best pumps that you can get. They are loud as hell which might be an issue for a street car, although they recently came out with a quieter model. You also need to mount the pump in a different location.

As far as running multiple (ie. staged) pumps; I do not get the logic. Single pumps to handle 1200hp exist today and running multiple pumps means you need extra engine cutoff switches in case one fails. If one fails with no cutoff then you will run lean due to lack of fuel.

Konstantin

</font><blockquote><font size="1" face="Verdana,Tahoma,Arial,Helvetica,Geneva">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Arial,Helvetica,Geneva">Originally posted by Transaxle:
<strong> </font><blockquote><font size="1" face="Verdana,Tahoma,Arial,Helvetica,Geneva">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Arial,Helvetica,Geneva">Originally posted by Konstantin:
<strong>.... I need one that suports 600 HP....
</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Arial,Helvetica,Geneva">Come on guy - you're joking ?</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Arial,Helvetica,Geneva">no I am not joking.
Just read the thread CAREFULLY and you wil see what I mean!!

Maybe you are not aware of this but a 951 can reach 600 HP and anyway who said that I want to run the pump in 100% of its efficiency?
To have a healthy 400 HP it is better and safer to have fuel pump that suports more than 400 HP. I would say a fuel pump that supports 600 HP is ok. The same for the Injectors, the octane in the fuel etc etc. you alway need a safety margin.
Better safe than sorry.

when I say if all pumps are the same i mean DO all of them the SLC the 928 etc have the same fuel rate?
I know it is not the same pump but which one has the BIGGEST flow rate and will still fit in the car without many modifications.
The factory manual says something about 830 CC/min (or was this 30 secß9 How many CC do the 928 or the MB SLC pump does it delivers?

Konstantin

<img border="0" alt="[ouch]" title="" src="graemlins/c.gif" />

Thom

</font><blockquote><font size="1" face="Verdana,Tahoma,Arial,Helvetica,Geneva">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Arial,Helvetica,Geneva">Originally posted by Konstantin: <strong>better and safer [...] you alway need a safety margin.
Better safe than sorry.</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Arial,Helvetica,Geneva">Even with "a mere" 400hp what about the driver then?
Are you sure you'll be able to afford Derek Bell's or Hans Stück's services? <img border="0" title="" alt="[Wink]" src="wink.gif" />

Alan C.

Konstantin,
Good questions on flow. The flow would need to take into account the supply and return hose sizes.

A friend is running the Lindsey pump and is hitting 400 rwhp with no known fuel problems. He will be installing an electric fuel pressure gauge this season. We may learn something from the install. I plan to try to log fuel pressure with the Tec3 and Weldon 2025 this year. It would be interesting to plot fuel pressure vs. boost pressure vs. time.

Does the pump supply the same pressure as it heats up over time? I may try to do the same data logging on my friends Tec3. That would make a nice comparrison of pumps. I'm sure you are interested in that as well.

Alan C.

Danno

One thing that hasn't been mentioned is flow-rate vs. fuel-pressure. Just like in comparing injectors, you have to equalize the flow-rate at various pressures.

Alan C.

Danno,
That's what I was getting to in the line sizes. A big pump and stock lines versus a big pump and
-8 lines.
Alan C.