twin turbo setups for 454
 

what would be more efficient on a 454 big block

normal:
2 identical turbos

sequential:
1 smaller turbo and one larger turbo, both feeding the intercooler

or compound:
1 smaller 1 huge turbo with the smaller one driving the larger one.

or a single huge turbo?

stock stroke, .040 pistons, around 8.5:1 compression

approximately 7.1 liters of displacement.

and fuel injection

Re: twin turbo setups for 454
 

compound less lag?? not sure but there is a lot of displacement there haha got pics of all this?

Re: twin turbo setups for 454
 

pics are all in my head.

heres the car its going in eventually.

Attachment 20146

Attachment 20147

Re: twin turbo setups for 454
 

twin holset hx35's would be just great. O0
------s aren't very creative nowadays fo some reason...

Re: twin turbo setups for 454
 

somemuch room~ when did you get this?

Re: twin turbo setups for 454
 

a pair of t-bird turbo's will lay out 600hp are you trying to make more than that ?

Re: twin turbo setups for 454
 

at the moment im tossing ideas around man. i was looking for like 800-1000 hp.

its going to be built from the bottom up and wont happen for a while. need to amass parts and ----.

and ive had the car since i was 15. my dads idea so far for how it is. but corvette red on a slow ass car is sacreligous in my opinion.

its a numbers matching 1966 chevelle malibu. even came with smog pumps and ----. bought it off the original owner.

Re: twin turbo setups for 454
 

badass, its a toss up what to do i dont know a lot about the v8 stuff and what works well or better. but i think it would be sweet to do what the diesel trucks do, with one turbo feeding the other one! itd be sweet as hell.

Re: twin turbo setups for 454
 

small turbo gets exhaust in. exhaust out goes into large turbo exhaust in.

Re: twin turbo setups for 454
 

I'd say 2 SC61's or equivalently sized personally. It's not like you'll be lacking in low end torque with such a big motor anyway. How often do you see a 8.1L bog the launch?

Re: twin turbo setups for 454
 

twin gt 35, or 2 gm8, or 2 holsets, single gt 42. It all depends on where you want to make power and how much. Your weekest and most expesive link with this thing is gona be the drivetrain.

Re: twin turbo setups for 454
 

smog pumps ??

i thought they didnt start emission laws till 67 ?

Re: twin turbo setups for 454
 

i've got a hx55 that would make a great resident in that engine bay

Re: twin turbo setups for 454
 

i vote single s1mplex hx55 or twin hx35's

Re: twin turbo setups for 454
 

but no cat t4's.. thats got a home 8)

Re: twin turbo setups for 454
 

You can make the same power on a single turbo as twins. No need for a sequential setup...that 454 is gonna make enough torque as is.

I would go with a turbonetics thumper series. ;D

Re: twin turbo setups for 454
 

small turbo gets exhaust in from one side. exhaust out goes into large turbo exhaust in w/ the otherside exhaust as well.

i would draw it but i suck at paint.

Re: twin turbo setups for 454
 

O0

Re: twin turbo setups for 454
 

i want these two turbos, smaller feeding the larger.

Attachment 20125

Re: twin turbo setups for 454
 

BTW, 463 cubes and only 7.6L of displacement.

Nice '66 Maly

650-700 HP NA with ease, traction will be and issue without the turbos.

Planning on TH400 with 3500 stall? 3.73 gear?

Re: twin turbo setups for 454
 

Hey! those are mine! hehe.

The smaller one is a TO4 full 60-1 Im running on my truck with a 5.2l. The bigger one is from like a 12 liter cummins from a semi, I sold it on ebay a while back though.

Re: twin turbo setups for 454
 

your right, a 454 is 7.1 liters not 8.1, i must have been high it happens.
thats the transmission setup i wanted exactly, do you think it would be enough?
im still up in the air as to what i want to do to put the power down.

im open to any suggestions.

also, if i ran a smaller one driving the larger, is it possible to go like half compund half sequential.

where the exhaust from the smaller of the two turbos goes to drive the exhaust turbine,
but the intake charge would run to the intercooler and not the air intake on the larger turbo?
because i dont need the insane compression that a diesel would but the extra exhaust driving the larger turbo couldnt hurt i dont think.

and should the smaller of the turbos wastegate dump into the atmosphere or into the exhaust going to the larger turbo?



that cummins turbo is huge, how did you come across it?

Re: twin turbo setups for 454
 

compounding turbos is running your compressor outlet into another turbos compressor inlet, to compound the boost. It's only used on diesel trucks to make retardedly high boost levels that you're not going to need on a gas engine :y

Re: twin turbo setups for 454
 

an 8.1 is a 496 or so says the 2005 yukon 2500 specs

Re: twin turbo setups for 454
 

thats why i asked about this idea.

Re: twin turbo setups for 454
 

with a 3500 stall converter, i'm failing to see why a smaller turbo is needed. i would just throw one big one or two medium twins on there, one for each bank. but whatever, its a sweet ride either way until you try to stop or turn. we all know those cars were built for the drag race anyway.

Re: twin turbo setups for 454
 

KISS 1 per bank.

Re: twin turbo setups for 454
 

Turbo V8 guy checking in:

S400 is $580 new from Majestic. It will support all the power yuou want to make (Up to 1000) and the 7.4L (yes) 454 will spool it way easy. You will also most likely want to go with a taller gear with the turbo. 3000ish stall, 3.08 or 3.27 gear, 500-600 rwhp EASY all day with good street manners to boot.


FYI: 1 liter of displacement is ROUGHLY 60 cubic inches.

Re: twin turbo setups for 454
 

for those who couldn't sleep at night,

1 liter = 61.0237441 cubic inches

Re: twin turbo setups for 454
 

i know that there are tried and true ways of turboing this engine.

and simple is good.

but i want something unique.

something that you havent seen when i pop the hood.

im learning to tig weld right now, so i will keep you guys updated in this thread

Re: twin turbo setups for 454
 

mount the turbos straight to the intake

Re: twin turbo setups for 454
 

lol, he said when you pop the hood, not poppin out of the hood

Re: twin turbo setups for 454
 

Twin GT42 arhhhhhhhz! :o

Re: twin turbo setups for 454
 

buy my hx55... and make 1000hp

Re: twin turbo setups for 454
 

http://lakebox.dnsalias.com/photos/1...d/DSC06302.JPG

In your basic family boat:
http://lakebox.dnsalias.com/photos/1...d/DSC06308.JPG

Re: twin turbo setups for 454
 

another question about big blocks. if i were to use a ford v10 TB, would it flow enough air to feed this engine?

i think that its like twin 56mm

i can get that tb for cheap cuz those ---- ass v10s drop plugs all the time.

i am planning on megasquirt with all gm sensors, but this ford TB. will this confuse things?

does anyone know of a large oem twin plate throttle body off a GM?

Re: twin turbo setups for 454
 

just use a carburetor and save a few several hundred dollars on the fuel half of the setup

Re: twin turbo setups for 454
 

blow through carbs are expensive as hell too.

Re: twin turbo setups for 454
 

not really.... do the mods yourself, this is hmt, not ballerturbosetups.com

Re: twin turbo setups for 454
 

negative, just make sure the float is not hollow, or the boost will crush it. then you have to buy a few metering rods/jet sizes to increase the fuel. do some research, it isn't that hard.

ps, you could be really gangster and get a dual 4 intake mani, then run one trubo to each carb. I personally have never seen that, prorbably cause it isn't practical but i thought you said you wanted different.