LT1 and a T56 in a 55 Chevy

[2Loose]

Back on my '55 hardtop project, I'll be using this diagram for the fuel pressure regulator hookup...

Fuel pump pressure inlet to the main PR on the left, controlled pressure outlet feed to the fuel rails on the right, return secondary PR feed from the fuel rails to the return line at the bottom of the main PR....

An alternative method would be to modify the fuel rails and put the return PR and return line out at the other end of the fuel rails, but I'm going to try it this way first...
-Willy-

More photos HERE...

 

[Grumpy]

that looks like a well thought out ,and fabricated fuel delivery system lay out, from the parts and way its set up to me!

 

[2Loose]

Thanks Grumpy....

Looking for the right size bolts for those fuel rails to the plenum
and noticed the plenum only had 4 rusty bolts, so dug out
some ss allen head bolts and washers, and installed them...

I've always had good luck with a copper anti-seize when using
ss bolts in aluminum heads...

 

[2Loose]

Hung the main fuel PR valve and hooked up hoses, eventually it will probably need to be modified after the front fenders are on, but for now....

And no, that return line is not as close to the headers as it looks in this pic...

More pix here, (scroll down...)

Willy

 

[55C150]

My fuel lines are outside the rails. The feed line is on the passenger side, the return line is on the driver side.

 

[Grumpy]

yeah! even with the heat shield on the feed and return lines,
running them that close to the headers, would not be ideal.

 

[2Loose]

One of my friends ran his fuel lines inside the frame, I thought about that, but this one piece "California" frame is so pristine I was reluctant to try anything like that.
I may end up moving them to outside the rail if there's heating problems with the fuel delivery. I've also used a piece of sheet metal on past projects between the headers and the fuel lines to deflect the heat, that seems to work pretty well also. I've also wrapped header tubes with that same stuff with good results, a lot of work though....

 

[2Loose]

I'm going to have to dig around and find out what all these ports are for,
These four are on the left side of the plenum...

These two are on the right side...

This one is on top of the front, right corner of the plenum...

 

[Grumpy]

These are of my 93 so I can't swear they are the same, but I will also include the routing label so you can compare it to yours. I know where most of the lines go on my car so if you have a question about one in particular just ask and I'll try to help.

 

[2Loose]

Many thanks, when I bought my brand new '93 Camaro Z28, LT1, it was one of the first ones to hit the Pacific NW, all black, I loved that car, was really upset when I totaled it in '98, but luckily the worst damage was bent chassis and body damage to the rear and passengers sides, so I was able to salvage the motor/ T56 tranny undamaged, and stash 'em for future projects, so now it is getting used. I had played with a fresh air intake, an aftermarket speed density system, an adjustable fuel pressure regulator, and 4.56 rear posi gear in that Camaro before I twisted it up !!
I've rebuilt it now with a 396 ci bore and stroke, ported heads, a beefier solid roller lifter can, and I ported the plenum to match and reamed out the front of the plenum for a larger throttle body. Am skipping the egr, so will plug that, need to figure out the other stuff. The dealer I bought it from in Oregon told me that the Camaro Z28 LT1 was essentially the same as the Corvette LT1, but that they rated the Camaro at 300 hp at a lower rpm, and rated the Corvette at 350 hp at a higher rpm. Heaven forbid that the Camaro should be rated the same as the Corvette !! The build sheet I used is supposed to give me about 500 ft-lbs, we shall see....

 

[2Loose]

Here's 8 old pix of the original motor,
freshly pulled out of the wrecked '93 Camaro Z28, LT1

 

[2Loose]

Got my hands on an original '93 Camaro shop manual, these two ports on the right side of the plenum are vacuum ports, the upper one is hooked to the original fuel pressure regulator vacuum port, which I'm going to leave open to the atmosphere for now, and will just plug this port, and the lower one in the old original pic is hooked to an "Evaporative Emission Canister Purge Solenoid Valve"....
Hmmmmm....

The large port shown below is apparently a connection to the crankcase, and is setup as a "crankcase vent recirculation valve", which you can see in the second pic...
I think I might keep that also, but fitting the crankcase connection to a road vent tube like the older motors used would be ok too....

I think both the upper small ports are just vacuum ports, one is shown in the old pic as a brake booster vacuum connection....

I really have no idea what this hole in the top, front, right corner of the plenum is for, or what the device plugged into that hole in the second pic is....
(scratching the head....)

These rear ports I'd blocked off earlier, they are EGR (exhaust gas recirculation) ports, that I'm not going to use on this car...
The lower pic shows some of the hardware for that device...

More Later...
Willy

 

[Grumpy]

thank you for posting some great instructional and informative pictures

 

[2Loose]

Messed around some more with how the fuel hoses were laid out at the pressure regulator...

And bolted in a new Optima red top in the trunk...

MORE pix here....

 

[Maniacmechanic1]

I see a way Willy to route the fuel lines different.
Use Bulkhead AN Fittings.

I did it that way on a 1970 Mach 1 Mustang.
I ran the Stainless braided #8 AN fuel hose right through the Drivers inside rocker panel.

 

[2Loose]

I like your idea, I think I need to set the fenders on and see just where the inner fenders fit, I just couldn't remember exactly where they go, and my '55 gasser doesn't have inner fenders, so I couldn't look there. So, on one of the upcoming "fender friday" beer and bbq events, the guys and I will fit the fenders on and see just where the obstacles might be....

 

[2Loose]

I see a way Willy to route the fuel lines different.
Use Bulkhead AN Fittings.

I did it that way on a 1970 Mach 1 Mustang.
I ran the Stainless braided #8 AN fuel hose right through the Drivers inside rocker panel.

I'm not seeing something, as it sounds like routing the fuel lines inside then through the bulkhead, I'm pretty sure I'm misunderstanding that.
I'm thinking of a sheet spacer between the fuel lines and the headers, I have 16 ga galv available, and I'm very capable of heat wrapping the headers on that side. Am seariously thinking that way...
Anybody wanna fly out to Maui and help me wrap these headers ??
Just kidding...
Willy

ps, any pix of that mustang job posted anywhere ??

 

[Maniacmechanic1]

I'm not seeing something, as it sounds like routing the fuel lines inside then through the bulkhead, I'm pretty sure I'm misunderstanding that.
I'm thinking of a sheet spacer between the fuel lines and the headers, I have 16 ga galv available, and I'm very capable of heat wrapping the headers on that side. Am seariously thinking that way...
Anybody wanna fly out to Maui and help me wrap these headers ??
Just kidding...
Willy

ps, any pix of that mustang job posted anywhere ??

No Pics of the 1970 Mach1 Mustang Fuel system layout.
I did it in 2006 before I was on Car Forums.
I started taking regular pictures in 2007 when I bought a digital camera.

 

[Maniacmechanic1]

https://www.summitracing.com/search...der=Ascending&tw=Bulkhea&sw=Bulkhead Fittings

 

[2Loose]

I put a 90 hose end on at the inlet side of that fuel filter, looks a lot better now...
I'll mount that filter on the side of the inner fender when I put the fenders back on...