Fuel Tanks

[Garage Dog 65]

Early C5 fuel tanks and pumps.

[Moose]

ok.. I'm a little confused. I'm almost to the fuel system on my car and been doing research.

I've got a heads and cam LS1, should put down 450rwhp. I was going to run the rock valley tank, with a walbro 255 pump (intank). Was going to use a c5 fuel regulator mounted in back.

Now, I'm thinking I may have problems.. Am I over thinking this? I'd Rather spend extra money now and do it right first time.. suggestions..

I do mostly street driving, with some track time.. I'd like to get into autocross, but not on regular basis..

[Bow Tie 67]

Originally Posted by Moose

ok.. I'm a little confused. I'm almost to the fuel system on my car and been doing research.

I've got a heads and cam LS1, should put down 450rwhp. I was going to run the rock valley tank, with a walbro 255 pump (intank). Was going to use a c5 fuel regulator mounted in back.

Now, I'm thinking I may have problems.. Am I over thinking this? I'd Rather spend extra money now and do it right first time.. suggestions..

I do mostly street driving, with some track time.. I'd like to get into autocross, but not on regular basis..

I drive and race my car hard. It has a ricks tank with internal walbro pump and an external vette regulator. I can run down to 1/2 tank on track with race tires no problem. On the street I can go close to empty with no problems.

At Gingerman last June I started with a full tank and made it to the 3rd 20 min session when I started to feel the fuel starvation in extended cornering situations. My setup is currently 420 rwhp and will drop to roughly 6 mpg on the track.

[Moose]

Thanks Matt..

I think I'll go with the ricks narrowed tank then. I plan on mini tubbing one of these days.

[RobG]

What are the specs on the CTS-V pumps?

Flow rating, horsepower limit, that sort of stuff.

[RobG]

Anyone?

[GregWeld]

Originally Posted by RobG

Anyone?

Just assume that it's fair to say - the latest model versions can handle 550 hp... Since that's what the CTS-V engine is rated at.

[ccracin]

Originally Posted by GregWeld

Just assume that it's fair to say - the latest model versions can handle 550 hp... Since that's what the CTS-V engine is rated at.

That's a good estimate. It might go 600 na as the CTS-V is supercharged.

[RobG]

Originally Posted by GregWeld

Just assume that it's fair to say - the latest model versions can handle 550 hp... Since that's what the CTS-V engine is rated at.

I was curious for comparisons sake. If Mark Stielow put this unit in to support a ZR1 powerplant and that's 630hp I'm wondering what it's good up to. Seems like a sweet deal regardless.

Thanks guys.

[Garage Dog 65]

Sorry Rob - you wouldn't believe how difficult it is to get info on new parts from GM ... I spent an entire day looking and calling for info with no luck.

I called the AC Delco tech assistance line. That is contracted out by GM to a company that performs tech work for many of the OEMs including Porsche lambo, etc. They could answer my spec info request on the part - but I would need to setup an account first - then it would cost $3.25 for each question - and $3.25 per minute for them to answer the question.

So unless Mark can provide the info from the inside - or a member with access to the info can add it - I'll have to setup an account and pay.

GM # 19207950 and ACD # M10235

I have also tried to get the name of the supply vendor for the venturi jet component used in the early C5 Fuel Sender/Jet Pump unit - but no one will give that out as it's still proprietary.... been making those since what 1998 ? So I have bought a couple used assy's off e-bay for $20 bucks and will piece meal the setup together.

Man I'm spoiled from aviation ... the supply vendor's name is right there next to the part number in the illustrated parts catalog - WITH their address and phone number.

Rant off...