J Chen

Hi Guys,
Anyone out there running
a GTS fuel pump.
Will it be able to support
400 rwhp with 3 bar fuel
regulator.

Thanks

TonyG

Yes.

Also Lindsey sells an upgraded fuel pump for around $150. This pump is around 50% larger physically than the stock pump (longer but same diameter) and it will fit into the stock location. It will easily support 400 - 450 rear wheel Hp.

TonyG

Danno

The Lindsey pump is actually not the 928-GTS. It does flow about 10-15% more than the stock Bosch-61421 pump #0.580.464.021 pump though. The 928-GTS uses a Bosch-61457 #0.580.464.057 which flows 20-25% more than the stock 951 pump.

J Chen

Thanks Guys,
So Danno do I go for the Lindsey
or GTS pump ?
Oh Danno please check your mail

Mike S

Stock pump flows how many rear wheel hp? 350?

EDIT: at 3 bar that is

MySwiss

I have to disagree with what is being written here. I have been in contact with Bosch about this exact topic. Here are the specs from Bosch

Stock pump: flows 130L/h and with 43.5psi max
(61421)

Lindsey pump : flows 128L/h with 72.5psi max
(61942)

GTS pump : flows 147L/h with 58 psi max
(61457)

We carry both in stock, but don't see the benefits of using the Lindsey unit, other then the cost. It's about 45$ less then the GTS pump.

Danno

Strange... the manual says the stock pump should flow 850cc/30s @ 2.5-bar on the FPR. That's 1700cc/min or 102 ltr/hr@2.5-bar. In either case, the 61942 or the 61457 will flow more than the stock pump.

JChen, I sent you two PM from here yesterday did you get it? My email to you is still boucning.

Duke

It's hard to compare pumps when the flow rates aren't at the same pressure.
It would be interesting to know how much the stock pump flows at around 61,5 psi which would equal the circumstances when on full boost at 18 psi with 3,0 bar of base fuel pressure .

Let's calculate what the GTS pump can support..
Assuming a base fuel pressure of 43,5 psi.
That leaves us with 147 L/H at a boost pressure of 14,5 psi
= 612,5 cc fuel/cylinder/minute which at a duty cycle of 80% would support 765 cc/min injectors.

I'd like to know the BSFC value of a typical 951-engine. Using RCeng's formulas that queals around 380 crank hp but that's not nearly right...

EDIT: forgot to add the "not" in nearly right..

Danno

The BSFC I use for a 951 is 0.50 since that seems to fit into all the equations and models stock conditions accurately.

It's hard to get any kind of real technical specs. from Bosch. They don't give it out easily and when they do, they're not very accurate or specific about it. Like not matching flow-rates on those pumps with the pressure that was used to test that flow. Also flow-rates also vary with voltage. Here's some specs for a Bosch # 0.580.254.984 pump:

_ 215 l/h @ 43 PSI @ 12 volts
_ 200 l/h @ 50 PSI @ 12 volts
_ 237 l/h @ 42 PSI @ 13 volts
_ 212 l/h @ 71 PSI @ 13 volts

Notice that as you increase pressure, flow goes down. But it goes up with higher-voltage.

J Chen

Hi Guys,
So, which pump should I used ?
Danno, no e-mail. Did you used
the new e-mail address that I send
you yesterday ?

MySwiss

Danno, your right about Bosch not behing the easiest bunch, to get some accurate info. I called them 3 times, before I could get someone, who knew their stuff. So it's still not clear, if we have the right #.

Waterguy

Typically pumps will not change their flow rate much when operated below their design pressure rating. Once you exceed that rating, flow rate will start to drop off fast. If we assume that MySwiss's values represent nominal design flow rate (a big assumption, I know, but lets give Bosch a little credit), then the 928GTS pump is a better pump. That pump is optimised for higher flow rate, the Lindsey pump is optimised for higher pressure.

OTOH, Tony G says that the Lindsey pump will work for your application, so maybe go with whichever has a lower price.

Danno, that is a minimum spec, not a design value. ("Delivery rate should be at least 850 cc/30 sec.") Notice they do specify using a 1.5 L container for the test.

TonyG

J Chen

Either will work.


I use the pump from Lindsey currently. It has zero problems support the power levels you are after.

TonyG

David Floyd

I posted this same question about 15 months ago. I ended up going with the Lindsey pump and it is doing the job well for me.

NZ951

Lindsey just supply a bosch pump. its not a Lindsey pump as such... you can get it anywhere that sell bosch yeah?