need twin turbo advice February 20, 2012 05:47PM
I recently bought a almost complete tractor, it is a Ford, has a 401 motor. I was told it was going to be a twin charger when it was done. Everything looks to be correct for running it this way, but my main concern is what to run for chargers? It has a 800 cc p pump, how much of a twin set can I get away with? Any idea and help is appreciated!
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Re: need twin turbo advice February 21, 2012 12:16AM
A cheap way is t08 and t1890 think most run holsets now
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Re: need twin turbo advice February 21, 2012 03:52AM
What would the inlet and outlet sizes be on chargers like that? Also just how much turbo can 800 ccs turn on a engine like this?
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Re: need twin turbo advice February 21, 2012 05:30AM
The T18a90 is 3.6 inducer, they are probably talking about a T08 that is about 3". A S4 of similar size would be another option for the bottom charger.
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Re: need twin turbo advice February 21, 2012 07:27AM
Run a 4.1x4.4 top charger, and a 3x3.75 bottom charger any make of charger will work just matter of what you an find.
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Re: need twin turbo advice February 21, 2012 07:40AM
Is my pump enough to push a set like that?
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Re: need twin turbo advice February 23, 2012 09:40AM
I run 800 cc p pump s4 3x3.5, and a t18a90 3.9x4.125 on top works great
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Re: need twin turbo advice February 23, 2012 01:02PM
I have the following in the shop if you would need any.
t08 steel back fresh
t08 steel back 6 runs
95 fresh
90 double thrust fresh

all worked on by simpson and all would work for what you are doing.

712 887 1151
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Re: need twin turbo advice February 23, 2012 09:59AM
800cc has the potential for 1600hp. I am a believer that 80% of people over size there manifold charger. When they get down on the big end, they flutter and get under there chargers and choke. People will ridicule me for this, but I would go no more than 3x3.4 hanging on the manifold and a 4.1 out front. This is more than enough air for 1600 with 400cubes.
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Re: need twin turbo advice February 23, 2012 12:18PM
I have an hx-82 on the bottom with an ht-100 on top. Builds a lot of boost, but takes cubes and fuel to feed it. Sounds like these guys have you on the right track. What do you guys think about throwing a 95 on top of a 74 for a more economically friendly twin?
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Re: need twin turbo advice February 23, 2012 03:16PM
Don't sound bad Neil, don't know how big your 74 is, wanted to try a 95 and a 90 and guy told me a I might over spin the 95???
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Re: need twin turbo advice February 24, 2012 10:07AM
You would over speed the 90, not the 95. Would never stay on top of them on a good track.
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Re: need twin turbo advice February 25, 2012 07:51AM
Thanks professor!
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Re: need twin turbo advice February 27, 2012 02:13AM
We have a similar setup with a 360. What all do you look for on turbo specs in setting up a twin, similar pressure ratios? How do you know what works and what won't? Also curious if changing exhaust housing on the big one up front what difference it will make?
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