Buick build

enjenjo · January 24, 2006, 12:39:51 AM

As most of you know, I have a 65 Buick Sportwagon. I blew the engine in it coming back from Bonneville in 2004. It broke a timing chain, which took out both the crank, and the block. That hurt. :cry:

It took me nearly a year to decide which way to go on the rebuild, I was torn between a 455 Stage I, or a smaller engine. I finally decided to stick with an original motor. so after some looking, I found another 300 ci. motor that had a good block.

After thinking about it, I decided to set it up with a TBI injection setup, and a 200R4 trans. While discussing the engine with my machinist, we discovered this is very similar to a Buick 3.8 V6, with two more cylinders. So we used 3.8 pistons with a 9.5 compression. The heads were rebuilt to 3.8 specs with new valves. I could not find a cam that was suitable for this setup on a 300 engine, so Delta Cams ground me one using 3.8 EFI specs.

So what I am building is a V8 version of the Buick GN motor without a turbo. With an overdrive automatic, and a 3.42 rear axle ratio. The Fuel injector is off a 305 Chevy V8, so should be sized right for this engine. I am going to build my own wiring harness, TBI is fairly simple.

Any thoughts? Comments? Criticism?

WZ JUNK · January 24, 2006, 06:46:09 AM

Sounds good to me. How are you going to do the fuel system? I like the pump in the tank setup best.

enjenjo · January 24, 2006, 09:59:02 AM

Quote from: "WZ JUNK"Sounds good to me. How are you going to do the fuel system? I like the pump in the tank setup best.

I do too, but I am not sure that will be possible here. The tank in a wagon is kind of oddly shaped, and does not lend itself to a sump. So I may run an external pump with an external sump instead. This is a small tank under the car that is supplied with low pressure fuel from the tank by one pump, and from there, high pressure fuel is drawn with another pump.

rooster · January 24, 2006, 10:25:18 AM

Sounds like a neat setup, the condition of the wagon makes it all worth it.

WZ JUNK · January 24, 2006, 11:02:39 AM

Quote from: "enjenjo"
Quote from: "WZ JUNK"Sounds good to me. How are you going to do the fuel system? I like the pump in the tank setup best.

I do too, but I am not dure that will be possible here. The tank in a wagon is kind of oddly shaped, and does not lend itself to a sump. So I may run an external pump with an external sump instead. This is a small tank under the car that is supplied with low pressure fuel from the tank by one pump, and from there, high pressure fuel is drawn with another pump.

I think that will work fine. I think that Choco shows that in his book. I know I have it in a book somewhere. I have a neighbor who has his setup like that and it works fine. Just an extra pump to fail but not a big deal.

John

GPster · January 24, 2006, 11:37:48 AM

Quote from: "enjenjo"The tank in a wagon is kind of oddly shaped, and does not lend itself to a sump.

Plus a trailer hitch of any capacity usually screws up any room that might be left to change tanks. Probably almost as bad as trying to design a hitch for a "Pro-Streeted" Rambler. GPster

rooster · January 24, 2006, 12:17:23 PM

Is it possable to tap in the existing tank and relocate through plumbing to a different sump area using gravity feed. Perhaps a altered spin-on diesel fuel filter to except fi pump.

just brain storming!

sirstude · January 24, 2006, 01:21:33 PM

John, What is the "Choco" book?, I have been looking for basic info on EFI and the wiring side for a long time. Just am interested for a later day.

Frank, Don't the TBI setups need less fuel pressure than the Tuned Port type? If so, I would think one of the inline EFI pumps would work well and keep you from having to find room. Looking foward to seeing the Buick again, I think it is KUHL!

Doug

river1 · January 24, 2006, 02:21:49 PM

Quote from: "sirstude"John, What is the "Choco" book?, I have been looking for basic info on EFI and the wiring side for a long time. Just am interested for a later day. Doug

http://www.amazon.com/gp/product/094939890X/qid=1138130434/sr=1-1/ref=sr_1_1/102-8015725-5277749?s=books&v=glance&n=283155

long link hope it works

later jim

phat46 · January 24, 2006, 04:44:10 PM

So what I am building is a V8 version of the Buick GN motor without a turbo.

So....why no turbo?

enjenjo · January 24, 2006, 05:04:58 PM

Quote from: "phat46"So what I am building is a V8 version of the Buick GN motor without a turbo.

So....why no turbo?

later

WZ JUNK · January 24, 2006, 08:47:13 PM

Quote from: "river1"
Quote from: "sirstude"John, What is the "Choco" book?, I have been looking for basic info on EFI and the wiring side for a long time. Just am interested for a later day. Doug

http://www.amazon.com/gp/product/094939890X/qid=1138130434/sr=1-1/ref=sr_1_1/102-8015725-5277749?s=books&v=glance&n=283155

long link hope it works

later jim

The one I have of Choco's is this one and it deals more with TPI but some of the information also would apply to TBI. http://www.compoutpost.com/store/item.asp?code=G-TPF1

John