[TitaniumTT]

Originally Posted by Slammedred7

Man....good thread. Looks really sharp!

Thanks man.

Originally Posted by NoDOHC

EDIT:

That was a good edit, worthy of it's own post because I almost didn't see it. The one thing that you forgot to mention is A draw from the pump as well. This is what I've been doing the last few nights is checking flow, A draw, and pressure before and after the filter.

So far I have concluded that my Cosmo pump has puked. It's drawing 12.5A @12v and 15 A @ 13.5V. The fucker is gone. In fact, the dicoloration that I'm seeing in the filter is most likely chunks of magnet getting spit out - per a theory from the Aeromotive tech that I spoke too who has actually seen that happen. My theory is this, I know I have had epoxy clogged filters in the past, you could peel it off the filter. So, I believe that the filter brought up the delta acorss itself so high that the pump just overworked itself. This is what cost engine #3. Prior to going to the dyno I had been running a Bosch 044 but MY GAWD is that fucker loud. The night before I put the Cosmo pump back in (pressure had been fine with the Bosch pump all the way to redline running pig rich) and drove out to Dave. On the drive out the Fuel Pressure sender puked. First pull she went way lean and warped 2 Apex seals. On the drive home I had to stop a few times to add fuel to the entire map to stay on the safe side of stoich. This also happened a few times on some longer road trips. I thought the filter was just clogging, in fact, I think the pump was just getting hotter and hotter and hotter (scary thought actually)

So got home from fragging engine #3 and in fact the filter was clogged with epoxy. Cleaned that thing out and continued to run the same pump ASSuming it was the filter Fastforward to this weeks adventures and towards the end of the day the "filter clogged" Changed it out (let the pump relax for ~45 minutes) and made one pull and alls well, go for the money pull (she did do 402.77) and the "filter clogged" again. Without changing the filter I'm testing the delta and it's actually ~.3psi less BEFORE the filter. Here's why I think that is. At the reg I'm using a 100psi sender and 10" of -3 line. Before the filter I'm using a 250psi sender and 4' of -4 line (all I had) So given the extra length to travel, and the lower resolution of the 250psi sender, I'm saying they are damn close and the delta is virtually unmeasurable as it should be with a filter with 150 miles and 2 dyno pulls.

Think about what we're asking the pump to do on the dyno though, run 56 psi basically all day long. Now in speaking with Dave he has run the Cosmo pump all the way to 500rwhp. Not the greatest but it does. We're also using the same pressures as well. The only 2 Cosmo pumps that he's seen fail were sugared. It's a good pump, but I don't think I'll be buying a new one just becuase it broke once (although the circumstances sucked) but I don't like replacing broken parts with the same thing.

So I've tested the Cosmo pump and it failed.
I tested my Bosch pump and it works, but loud as fuck
I have my buddies Walbro GSS341 which flows enough that I am testing tonight. If it's considerably quiter than the Bosch and holds pressure and flow, I'll run that until I can find my ultimate pump. I'm thinking it's going to the Apexi BNR33 or is it 32? Dunno but something like that. I want... need a quite pump. Bosch is too damn loud. Flows like a bejuzus but loud as hell.

So, off to install a Walbro now