please help 408 turbo ?????
#1
Banned
Thread Starter
Join Date: May 2007
Location: ocean city
Posts: 43
Likes: 0
Received 0 Likes
on
0 Posts
please help 408 turbo ?????
i am installing a hp stage 3 76mm turbo kit on a built 408 with 75lbs injecters with a sump tank with new lines magna fuel pro tuner pump rated to 2000hp fuel rails i will be using ls6 intake and stock 6.0l heads and a duel nozzel elky control meth injection kit my comp is 9.0:1 what kind of power sould i be able to get out of this setup trying to get to run 20 lbs of boost at the most
#4
I'm currently finishing up a similar setup on a customers 408 Corvette, with a custom single turbo setup using a T76. Our goals are 12PSI and 700-750HP.
I think 20 PSI out of that setup may be a little too much for the single T76 to supply. I think you may need to move up to a T88 to see 20PSI. I would have used a T88 on this one, but we already had the T76.
Hope this helps,
Ed
I think 20 PSI out of that setup may be a little too much for the single T76 to supply. I think you may need to move up to a T88 to see 20PSI. I would have used a T88 on this one, but we already had the T76.
Hope this helps,
Ed
#6
TECH Senior Member
iTrader: (21)
Originally Posted by turbo408stroker
no single kit
Never gunna get there with 408 cubes....
I couldnt do it with 38 cubes less then you....
I told the same thing to a local buddy of mine with a 408 and 76mm turbo and they couldnt even get to 11 psi.... so he's going bigger now...
For a 408 id say 91mm would be a perect match...
Meths gunna help with the fueling some but to get those 75# injectors to push enough fuel your going to need to Boost ref the FP Reg. and let FP rise with Boost to make them larger... Cause 20psi on a 408 will be around 1K HP.
Kyle
#7
Originally Posted by NA$TY-TA
Never gunna get there with 408 cubes....
I couldnt do it with 38 cubes less then you....
I told the same thing to a local buddy of mine with a 408 and 76mm turbo and they couldnt even get to 11 psi.... so he's going bigger now...
I couldnt do it with 38 cubes less then you....
I told the same thing to a local buddy of mine with a 408 and 76mm turbo and they couldnt even get to 11 psi.... so he's going bigger now...
I'm not sure what was wrong with yours or your buddies.
Mike
Trending Topics
#8
. . . and to the thread starter. . .
Just make sure you minize piping losses in the setup. A 3.5" downpipe, 3.5" or 4" exhaust, no cats, straight through muffler (like Magnaflow) would help keep backpressure/boost under control. Also, make sure you use little or no piping upstream of the compressor, a huge air filter, 3" mandrel bent cold side piping, an intercooler with a low dP, etc. . . All these things will improve the backpressure/boost ratio, which is usually a problem on these large cid, T76 combinations. On our 377/T76, we optimized all these things and were getting 18 psi boost and 26 psi backpressure, which is outstanding considering the turbo and cid.
Mike
Just make sure you minize piping losses in the setup. A 3.5" downpipe, 3.5" or 4" exhaust, no cats, straight through muffler (like Magnaflow) would help keep backpressure/boost under control. Also, make sure you use little or no piping upstream of the compressor, a huge air filter, 3" mandrel bent cold side piping, an intercooler with a low dP, etc. . . All these things will improve the backpressure/boost ratio, which is usually a problem on these large cid, T76 combinations. On our 377/T76, we optimized all these things and were getting 18 psi boost and 26 psi backpressure, which is outstanding considering the turbo and cid.
Mike