Stoichiometric

iTrader: (10)

I have a low compression 408 that I am getting ready to stick into a '64 fleetside. I have had turbo plans for this engine but was wondering if a 112 Radix would be able to add anything extra to the already turbo engine?

trever1t

iTrader: (14)

Yes.......complication?



It was been discussed not long ago...let me search.

Here you go! https://www.performancetrucks.net/fo...l+power+adders

Bill Reid

iTrader: (14)

I have never tried supercharger / turbocharger together but I sure as hell will give you my support!

Bill

parish8

iTrader: (6)

i think it would be worth trying. instant boost with killer top end.

anyone seen the twin turbo cobra? the motor is 100% stock including the blower. i am sure it has a pully on it. they boost it to something like 22psi with the turbos and another 18psi with the blower for a total of 40psi. 1100 or 1200rwhp on a STOCK 4.6 cobra motor.

on that car it makes more sence since the car allready has the blower on it. i dont think i would try it on a 408 unless i allready had the blower on there and wanted a lot more.

Stoichiometric

iTrader: (10)

I wonder how well a 112 would supply my 408? It obviously won't keep up with the top end airflow, will it become a restriction for the turbo on top? It would be ideal if it could fill in the 0-3000 range with a few pounds of boost and not create a restricion after that. I'm trying to compare some airflow charts now, how do you converter lbs/min to m^3/hr?

parish8

iTrader: (6)

the blower will do just like you said. give you the low end instant boost. then the turbos will give you as much top end as you can handle or as the motor or tranny or fuel can handle.

best of both worlds but a lot of money.

TrickTurbo

iTrader: (12)

NO the blower would not be the over all restriction. even though the blower by itself might not flow X amount of air, it is now force fed more air, meaning it will move more air. Its a compounding thing, to figure out really need to install and see. Some will say the blower is the restriction not allow enough to get through, but then the turbo becomes the restriction on the exhuast side not allowing the exhuast to get out fast enough.
If someone has a blower they are not using, I would through it on our test 5.3 just to say here is the data.

Built it and figure out any problem that comes up later.

parish8

iTrader: (6)

thats a test i would like to see.

thing is for it to be of any benifit the turbo/turbos would need to be large enough that lag is an issue. on my 408 with twin gts70's the lag was significant and did cut into the fun factor of the truck. sticking a small blower on top of it would have been a sweet test.

on a typical 6.0/t76 combo the lag isn't much but i believe in a set up like that a blower would reduce lag(compared to just the t76) and at the same time increase max hp potential compared to just the 6.0/t76.

it would take a prety stout combo to really test the limits of things and see if there were truely gains at the top. i had a basic t76 on a 408, not a gts76. it maxed out around 640rwhp. with the blower on top i bet it would add 100-200more peek hp and have instant boost

DanaliHD

iTrader: (5)

that was one of my thoughts back in the day when i started my build. probably should have done it cause at least i could have been running this whole time with my whipple.

Slowhawk

iTrader: (11)

We just gave the customer back his twin turbo/supercharged Cobra.It made 1012hp at 22-24lbs of boost at the manifold(not the magazine car).From what I was told the car still felt like a dog in the midrange.

As for a 408 with a blower and turbo,I don't see the point of it.The 408ci makes great NA power and with a properly sized turbo/converter there is very little lag.