CRXDrew

I've read that many older DSM pumps have the EXACT same casing as the stock EF honda pumps. The dsm's include: 1st gen Talon/Eclipse turbos and 3000GT VR4's.

Now the question is, Does anyone know the exact rate that these bad boys pump out? I figure these pumps are feeding engines that demand WAY more fuel, so it the lph figures of these pumps SHOULD support most street setups.

Drew

APEX CRX

I've heard the same too, I want to know the flow rate too

CRXDrew

I heard something like the stock pump could handle 300HP-wheel on 450 injectors.

StorminMatt

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CRXDrew &raquo;</TD></TR><TR><TD CLASS="quote">I heard something like the stock pump could handle 300HP-wheel on 450 injectors. </TD></TR></TABLE>

Not quite. My stock DX pump pooped out at about 5500RPM with my JDM ITR motor. On the other hand, the stock wiring to the fuel pump in a CRX is HORRIBLE. You lose about 2 volts between the battery and the actual fuel pump. Upgrading the wiring and using a piggyback relay improves the situation considerably, as increasing voltage to the pump increases its flow considerably.

As for DSM pumps, they are indeed externally identical to the stock CRX pump. For this reason, they are an excellent (albeit more expensive) alternative to Walbro pumps, which are not exactly a match made in heaven for 1988-1991 cars as far as fitment goes. As for flowrate, the Eclipse pump flows about 150LPH, which is adequate for most any N/A application. The 3000GT pump flows 190LPH. And the Supra TT pump (which is of the same type as the CRX and DSM cars) flows 270LPH, bettering even the 255LPH Walbro. Just make sure you get an actual Nippondenso pump from a dealer. Cheap, aftermarket imitations fall FAR short of the real thing when it comes to flow. Believe me, I know.

CRXDrew

By stock, I meant DSM stock, not CRX.

Anyway- StorminMatt,
You were the one who inspired me to look for a dsm pump. I read both of you extensive posts on the resource. I actually PM'ed you there but ya never replied. Anyway, should the 150LPH be enough for my mini-me, larger injectors, I/H/E, and a 75 shot? I know ppl run the 190 walbros with similar setups.

Oh and could you please explain where the wire runs to from the pump. I just wanna know which wires i need to beef up.

Thanks,
Drew

SiR Kid

I've got the Holley upgrade pump for a 1st gen DSM in my turbocharged car...

Made 232 at the wheels on the stock lines, stock filter, stock FPR, on 550cc injectors, and it was rich to redline from an airflow problem. And it's QUIET too!

I :heart: my fuel pump.

sircrxracer

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SiR Kid &raquo;</TD></TR><TR><TD CLASS="quote">I've got the Holley upgrade pump for a 1st gen DSM in my turbocharged car...

Made 232 at the wheels on the stock lines, stock filter, stock FPR, on 550cc injectors, and it was rich to redline from an airflow problem. And it's QUIET too!

I :heart: my fuel pump. </TD></TR></TABLE>

to you man! good numbers. Rob

StorminMatt

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SiR Kid &raquo;</TD></TR><TR><TD CLASS="quote">I've got the Holley upgrade pump for a 1st gen DSM in my turbocharged car...</TD></TR></TABLE>

But is it the Nippondenso style? Or is it of the Walbro (smaller) style? I personally don't trust Walbro pumps in applications that originally call for a Nippondenso. The mounting just doesn't seem secure.

StorminMatt

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CRXDrew &raquo;</TD></TR><TR><TD CLASS="quote">By stock, I meant DSM stock, not CRX.

Anyway- StorminMatt,
You were the one who inspired me to look for a dsm pump. I read both of you extensive posts on the resource. I actually PM'ed you there but ya never replied. Anyway, should the 150LPH be enough for my mini-me, larger injectors, I/H/E, and a 75 shot? I know ppl run the 190 walbros with similar setups.

Oh and could you please explain where the wire runs to from the pump. I just wanna know which wires i need to beef up.

Thanks,
Drew</TD></TR></TABLE>

150LPH should be fine for such a setup. And if you are nervous, go for the 3000GT pump, which delivers 190LPH. As for the wiring, I ran an 8AWG wire directly from the battery to the access plate under the storage compartment (CRX, or seat on a HB). I mounted my relay at the access plate. I used the old fuel pump power lead as a trigger for a 40 amp relay, sent the relay output to the wire going to the pump, and grounded the other coil lead to the body of the car.

bossman032

since we are on the fuel pump topic..

how about the 92-93 gsr fuel pumps I heard they fit the civic 91...?

someone shed some light

StorminMatt

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bossman032 &raquo;</TD></TR><TR><TD CLASS="quote">since we are on the fuel pump topic..

how about the 92-93 gsr fuel pumps I heard they fit the civic 91...?

someone shed some light </TD></TR></TABLE>

Yes, they do fit. They are a Nippondenso unit just like the 1988-1991 Civic/CRX. I am not sure of the flowrate, though.

89 CRX SI

jsut make sure you got adequate wiring to it is key...

Tory