Anybody put a roots or screw blower on an IDI

[ameristar1]

Has anyone successfully put a small roots or screw compressor on a 6.9/7.3?
Saw a kit for the 6.5 Hummer and marine app GMs; just curious.

 

[6 Nebraska IDIs]

I don't know of any but it has been discussed several times. It would be very neat to see. I think what kills the idea is the fact that a person would have to make a completely custom set of injection lines and intake that would set the blower over the IP. I think an 8-71 would be a bit difficult to use 6-71 would be easier, or even one of the low profile Weiand units.

 

[argve]

have not seen it in my travels over the years...

You could be the first.....

 

[dyoung14]

NOt sure whos truck this is but i believe it was on ebay at one time, anyway dave s. over on fte saved the pictures

 

[6 Nebraska IDIs]

Dude thats KILLER!
I WANT ONE!

 

[djl9172]

Sheez that's wild!! I might have to give it a shot. There's someone on CL up here with a 6-71 off of a Detroit and he only wants $450 for it! Looks like its in good shape. Now if I can talk the boss into another project!!

 

[david85]

Yes it does look cool, but I just don't see the point. A good turbo setup will compliment a diesel better than a belt driven blower. At least with a turbocharger, you have some hope of improving mileage and power because power is taken from the normally wasted exhaust flow. A blower takes power right off the crank which seems counter intuitive to me.

A good turbo would probably flow more anyway once it spools up. Also remember, you need intercooling and a bigger injector pump flow rate than the stock pump can deliver once you go much further than 10 PSI.

 

[icanfixall]

That truck had a BDS blower on it and the truck was in the Fresno Ca area. I live about 4 miles from BDS so I took the pictures of that motor to them. They told me they didn't have anything to do with the buildup. I asked about the intake manifold. They could build me one but... A one off was going to cost between $18,000.00 to $20,000.00.... The price would come down if they got more orders but geez... I found out that setup didn't do anything more than what a turbo does for our motors. Please remember the hp loss because the blower needs power to drive it is around 10%. So if you have a top fuel motor making 8000 hp you loose 800 hp right off the top... Thats about the hp of 9 non turbo idi motors..... Yes... The blower drive setup looks great but will it push the truck down the road any better... I'm not thinking it will... Sorry to burst someones bubble....

 

[ameristar1]

NOt sure whos truck this is but i believe it was on ebay at one time, anyway dave s. over on fte saved the pictures

Woah. Didn't expect that! A 6-71 on an IDI; now that's something else. Man, thanx for the pics.
I was thinking more along the lines of a Eaton mini blower like the ones they use on the Mustang Cobra and keep it under the hood. Doesn't take as much power to spin and it has a bypass. I figured since these things make boost from idle it would be good for a truck application. Plus they sound good.
As far as power loss, the modern stuff doesn't pull as much as the old school blowers, and even turbos take power in the form of backpressure to make power.

Dyoung14 get's the award for "Oddest Forced Induction Find For an IDI"

Ya did good

 

[6.9poweredscout]

when i started my scout build i bought a 6-71 off a detroit, but weas told there was no way to make it work. instead i'm going to try a twin turbo setup!

BTW i have the 6-71 still, anyone wanna give it a shot? first $400 takes it!

-Jon

 

[funnyman06]

I see no reason why a supercharger would not work great on an IDI. If you get it all set up right you can make boost off idle to help get those pulls started and still make boost up top. Also with a supercharger i dont think the truck would smoke much if at all. Think about it, if you are always pushing 8 PSI at a certain rpm, you would have to move a lot of fuel to make it smoke. Also with more air in the motor it would run very lean and that would keep the EGTs low i would think. People put SC 6.5Ls in boats all the time, why is this any different?

 

[FordGuy100]

It takes a lot of horsepower to turn that blower....horsepower that wouldnt be lost (or most of it at least) with a turbo. They look cool, but I dont think it would be all that good.

 

[towcat]

guys-
don't get too worked up.
it's only gingerbreading.
here's one of the pics, more later when I get home

 

[ameristar1]

Let's have a compromise for the turbo only guys, so we can all hang together.

And I don't think it has been done on an IDI yet, but could be wrong.

Small Roots or screw compressor for that fat bottom end torque,

Remote mount turbo compounding the supercharger for the top end..............


Now to find a way to weld the heads to the block so they don't blow off!

 

[dyoung14]

what about run a super charger and a turbo charger with the turbo blowing down the super charger, what would that do?