.... You don't think th400 can run 7s? 
Best Turbo Route for 7s?
Thread Starter
Joined: Sep 2006
Posts: 1,051
Likes: 3
From: Bloomington, illinois
Best Turbo Route for 7s? In the process of planing our next years build. Plans are to run in the 7s with a "street car" (although i dont drive it on the street). My Engine is going to be a 408 and 91mm. But i got to thinking, would it be better to run twin turbos? I know its going to cost more, i just want to have a powerfull efficent car. Any input to get me in the 7s would be great. I am running a th400 trans. 
Your first problem with running a big single capable of 7 sec passes is packaging. Specially if you want it to appear to be a strweet car. Packaging presents 2 problems. The first being the actual thumper itself and the second being the 5" DP that you have to get out of the engine compartment.
I don't think that the 408 w/ 91mm combo would get you there unless you plan on being sub 3K# anyway. We got LS2Formula JUST into the 7's so far and that's with twin TC78's at 3500#'s. Much easier to package the twins.
I don't think that the 408 w/ 91mm combo would get you there unless you plan on being sub 3K# anyway. We got LS2Formula JUST into the 7's so far and that's with twin TC78's at 3500#'s. Much easier to package the twins.
In the process of planing our next years build. Plans are to run in the 7s with a "street car" (although i dont drive it on the street). My Engine is going to be a 408 and 91mm. But i got to thinking, would it be better to run twin turbos? I know its going to cost more, i just want to have a powerfull efficent car. Any input to get me in the 7s would be great. I am running a th400 trans.
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A Precision Pro Mod 94 will get you in the 7's with the right combination-this is probably the smallest single capable of it.The physical size is a little smaller than a gt4788.A pair of 76's would easily do it as well.Your going to need a very well built engine and def would scrap the th400.
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Verdad Gallardo Depending on what's done to it it could hold, but that 2.44 first gear will make life harder with the launch, I personally am a glide guy ever since I swapped to the glide from a t400 and picked up 2 tenths and 2 mph! But a good glide or a th210 will do the trick.
Joined: Nov 2001
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From: Cecil County Raceway!!!
In the process of planing our next years build. Plans are to run in the 7s with a "street car" (although i dont drive it on the street). My Engine is going to be a 408 and 91mm. But i got to thinking, would it be better to run twin turbos? I know its going to cost more, i just want to have a powerfull efficent car. Any input to get me in the 7s would be great. I am running a th400 trans.
91mm EXT-R should fit the bill....
Thread Starter
Joined: Sep 2006
Posts: 1,051
Likes: 3
From: Bloomington, illinois
. They are 11 primary blade CW's, no secondary blades. Higher pressure, and more flow at lower shaft speeds. Also the wheels are 40-50grams lighter due to slimmed hub line and thinner blades as well as total blade count is less 10% minimum. Last edited by DrTurbo; Aug 5, 2010 at 03:19 PM.