Mythbuster: continuing project thread of my 1303 '75

[Eatoniashoprat]

Originally Posted by Wally

Thanks for the info Steve! I would feel better having a dedicated large-volume, low-psi feed pump for this tbh.
I never could find anything for this.
Hmm, worth looking into Carter pumps (never heard of them before).

Wally,

http://www.summitracing.com/parts/CRT-P4600HP/

This is the one I have been using to feed my surge tank. It seems to work well and haven't had any issues yet. I had some noise from it but it was caused but not mounting it properly and the body of the pump was touching some steel, giving off some vibration.

I also have a small bleed line of 3/16" coming from my surge tank and tees into the return line. This ensures that I do not build up pressure in the surge tank.

Mike

[Wally]

Originally Posted by Eatoniashoprat

Wally,

http://www.summitracing.com/parts/CRT-P4600HP/

This is the one I have been using to feed my surge tank. It seems to work well and haven't had any issues yet. I had some noise from it but it was caused but not mounting it properly and the body of the pump was touching some steel, giving off some vibration.

I also have a small bleed line of 3/16" coming from my surge tank and tees into the return line. This ensures that I do not build up pressure in the surge tank.

Mike

I searched and noticed that one too. It flows 100 gallons per hour, which is 450 ltr/h (?) which is quite a lot: a 044 pumps 300 ltr/h at 3 bar fuel press. and 250 at 4 bar I believe. That means a lot of by-pass. I think the other Carter pumps with 72 gallon/h rate (325 ltr/h?) would still provide more then the 044, but not have as much by-pass.
Too much pump in general would not be a problem however

Tnx.

[Eatoniashoprat]

Originally Posted by Wally

I searched and noticed that one too. It flows 100 gallons per hour, which is 450 ltr/h (?) which is quite a lot: a 044 pumps 300 ltr/h at 3 bar fuel press. and 250 at 4 bar I believe. That means a lot of by-pass. I think the other Carter pumps with 72 gallon/h rate (325 ltr/h?) would still provide more then the 044, but not have as much by-pass.
Too much pump in general would not be a problem however

Tnx.

That was my thought about too much is OK. After having fuel supply issues in another car, and not having baffles in my tank I thought I'd just put something in that even if the pick-up gets uncovered momentarily there is NO WAY my high pressure pump will lose supply. My hi-pres is a WALBRO but will be a 044 sooner than later. (walbro is LOUD).

Mike

[Wally]

You're probably right Mike, so I 'won' me a 100 gph one from evilbay. Hope it gets here soon.
In the meantime, I figured this turbo needs a bit smaller A/R for this little engine and it came in today: 0.91 instead of 1.00 A/R: Just looks as big as the other one

[MX67]

Downsizing is cool these days

[Wally]

Yeah, allthough visually it doesn't really looks to be any smaller...:





Didn't take more than a hour to exchange them
New feed pump (Carter 100gallon/h) also installed.
Attending a dyno day on the 12th march, so fingers crossed it now all works..