Homemade 125" FED Twin-turbo SBC

Well with the same size turbo on my 302 ci Ford, I ran 10 pounds and there was alot left but the chassis just wasnt there for it. I will be running a manual boost controller on this setup so 7 pounds of boost is as low as its going to go and with the controller I can go up to about 15 pounds before I need to step up to a stiffer wastegate spring. Im thinking that 12-16 pounds of boost is where these turbos will peak out. They would probably still make power at 20 psi but at the expense of huge back pressure and a very hot compressed air entering the carburetor. 12-15 lbs should be at the edge of their efficiency or their sweet spot.

 

Anytime, I would love to help.

 

Thats him, thanks for posting the link. I would have done it but I was worried it might come across as spam.

 

Yeah especially considering the motor isnt bolted to anything. I wanted to get the rearend as close as possible to its final location so I could fit the motor where it will need to go. This way while Im waiting on cash for the tubing I have something to do. What Im hoping for is to finish the turbo/motor stuff this next week then I should have some cash to get some tubing bent up for my hoop. If all goes well I should have a good handle on this thing by March and might be racing come May. Hopefully

 

Jim, thanks for the detailed answer!

Keep up the awesome build, and I'll keep following along.

Good luck!

 

I dig this setup. Nice work. The charge pipe looks good, but what about running a Y pipe where the two charge pipes come together at the bottom. Then a single charge pipe into the carb hat? Or what about an air-air intercooler mounted vertically where the two pipes are?

 

I really wanted to run an A/W intercooler or possibly even a narrow A/A intercooler but I dont think anyone would have used one in a dragster in the '60s. I will probably be running a water/methanol setup to help cool the charge anyway and thats something that can be disguised.
The reason for using 2 small pipes as opposed to a larger one is to keep the area inside the tubing small. The more volume the charge pipe holds, the less total boost I can run.

 

Very rad Jim.

 

I have the charge pipe finished finally. I have been saving some cash for my order of roll cage tubing so there hasnt been too much fabrication going on. Im really at a bit of a stand still until my top hoop is in place. Its looking like it will be another 2 weeks until it gets here.
Anyway Im glad to be finished all the turbo related fab, its one less thing to have to deal with. Now I can concentrate my efforts on building the cage, uprights and some new rear housing brackets. Here are some updated pictures.

 

This picture right here shows why I built the charge pipe the way I did. From the drivers seat the charge pipe does not interfere with my view of the track.

 

Since I need a blow off valve and dont want it to be an eyesore, I put it directly behind the bend in the charge pipe. This was the only place where I thought it would function good as well as stay somewhat hidden.

 

Jim, I'm really Diggin' the Turbo Budget Build and I've never had an interest in them now I'm glued to the build. Looks pretty cold out side!

 

Thanks for the update, Jim!

 

Yeah its freezing outside. Years ago when I read about turboed small blocks in car magazines, they were allways exotic high $$$ builds using expensive EFI. I allways had the image of twin-turbo builds being big money, so I never paid any attention since Im not into throwing lots of money at a car. It was about 2004 when I stumbled apon a site called toohighpsi.com, it was an owner operated small site dedicated to this guys project cars. I cant remember his name but he built a few twin turboed 351w and 302 powered Capris, Mustangs and a Thunderbird. He used cheap, self modded blow thru carbs and junkyard turbos. His cars were full weight, full interior street cars built CHEAP using junkyard stuff and they all ran deep into the 10s. It was this guys stuff that inspired me to try the cheap blow-thru method using inexpensive 4 cylinder based turbos.

 

Sure thing. BTW I like the new avatar!

 

Sitting in the back of the class here, Jim, really enjoying this! Great project.

 

this is what hot rodding is all about, using what you have and making perform better.

 

Hey Jim, any updates or are you snowed in? The finished pipes look great.

 

can't wait to see it go .

 

Looks like it should move pretty good, can't wait to see it run on video!! Good luck with the rest of the build. Let me know if you want some art done of it when finished. I love FED's. This one is definetely unique!!

 

Very cool and informative build. This digger is going to be insane! and to think this is all going on north of me! Can't wait to see and hear this go down the track!

-Josh

 

Updates?

 

Sorry for such a long delay guys. I have been at a stand still with the project since early February. My garage has been getting flooded pretty bad with the snow melting and there is so much condensation that I have covered the rail up until it gets better. The garage is level with the ground, so any water that gets on my lawn will come right into my shop. This year has been the worst by far and I think I have had enough. I have another garage on my property that I have plans to set up as my new shop. If I do it this year then I will be spending the majority of my summer working on that.

 

Dang life gets in the way Jim, cant wait to see the final product! Rocky

 

keep in touch let us know what happening,no more snow on the ground the lake's open but we might be getting to-morrow or sat a front is coming up the east coast toward us. summer is coming.

 

Jim:

Great job so far, I am currently building a prototype rectangular frame rail 120" Slingshot with a 900 HP 358 Cu Inch SBC Pro Stock Truck Motor that will NHRA SFI Spec to 2.6A 7.50 ET stayed tuned We used Pro Engineer 9 to design and do stress analysis and we are good to go There's is going to be alot of suprises with this build

Allen in PA

 

Just wondering......any UPDATES yet?

Hope you got your water situation under controll...same thing here...flooding all summer long!! Garage, driveway, you name it..I spent more time with cleaning up from water damage this past summer than ever before!!!

 

were do you run the waste gate vacume line to ? i know you run the blow off valve to the carb but where do you run the waste gate to ..thanks

 

where can I get a coller to hook up my powerglide to a rear end like yours