Looking to learn about boosting 455's

Please help me ray: I've been trying to find information on anything people have done with 455's and a pair of turbo's... I'm guessing for any kind of real wild power I'd need a girdled block among other very expensive things.... I've been looking at remote-mounted setups, some in the trunk and all... I just need information and more resources... its hard to dig through all the crap online because you punch in turbo and import, mustang, and LS1 stuff is all you see. Help pleeeeeeezzz !
:Comp:

 

A good start would be to take a good hard look at the factory manuals on the grand nationals. I know , you said 455. The principals will be the same.
I am sure there those on this board that have done it. just thinking about it ,I would think something like a latham super charger would easier and cheaper.

 

Much of this is covered on theis Board. Many Board members are the people doing these set ups. Use the Board search key above. I suggest you wait for the new TA aluminum Buick block to be released later this year. The strength of the factory 455 thin cast block is currently a bottleneck. I think Mike said they are designing it to handle up to 2000 hp which is plenty.

 

It's a good start, anyway! :Brow:

 

Alan

I am only needing about 1500hp over here for a strret car. If the weather is good come on over to Grille 57 tomorrow afternoon.

 

you need to use small cam's and are you wanting to use a carb or a fuel injection system if you elect to come right off of the headers then your going to need custom headers made. also you need the exhaust opened up on your heads click on more pics below and you can get a general idea what i did.

 

hey turbo455,

Got any pix of your turbo exhaust manifolds?o No:

I am looking for ideas to start the fab process for a set.:idea2:

Thanks

 

This is the best i can do, it is really tight. but basically 1-3-5-7 all meet above and 3-5 with the waste gate on number 8 primary. if you have room you should run all the tubes twisting towards the front of the motor and run your waste gate right at the flange where the primaries all come together.

 

here is a link to how alen did his, http://www.thedinosaurgang.com/parts.htm

I hope you don't mind alen. But if i had it to do over i would do mine like alen's.

 

thanks!!:TU: :beer

 

check out these log style manifolds they look like a good idea
http://v8buick.com/showthread.php?t=144518

 

The thing that always confuses me is the size of the turbos... what is most commonly used for a 455? Tell me what you guys are running...

Someday I want to build a twin turbo 455, so I'm trying to learn about them... lets see how you guys did it...

 

I used two 50 A/R t34/t4

 

Those log style manifolds do look interesting...:Brow: but I wonder how they'd flow compared to a front dump tubular style headers??:idea2: I know the logs would be tons easier for me to make, but flow numbers are also important to me...decisions, decisions...o No:



I got a pair of the stock style GN turbos with .62AR exhaust housings. They're supposed to be good up to like 350-375 hp each, so I've been told.

 

.62 ar should work just fine. I dont know how well the log style would work, but i thought they would be cheap and easy to build. I thought i might try them on my 67 skylark

 

No Prob! But I really need to update it! Me-----> :sleep:

As far as log manifolds vs headers, I think it depends entirely on what your goals are. If the logs fill your needs, fit better and are cheaper, then that's the better choice.

 

Hey Alan, what size primary tubes did you use to fab your headers?

 

1 3/4".

 

At street car power levels a log manifold works just fine. Look at the power levels that diesel trucks make with log manifolds and 60 lbs of boost! I ran a single turbo for space reasons, I have a stick and kept the stock clutch linkage. I must agree with turbo455, use a small cam. I run a custom grind with 220 degrees of intake at .050, real small. On a Mustang chassis dyno my best run was 517hp and 644ftlbs of torque at the wheels. I run 7 pounds of boost and that torque number was at 3,900 rpm, when I hit full boost. Not alot of hp, but I built the motor to make torque, and it pulls like a train.
You need good pistons in the motor. I had old forged speed pros and they lasted for awhile, but I finely smashed the ringlands down on them and they broke. I now have CP blower pistons with .340 between the ringlang and the crown. I will try to get some pictures of my setup and post them for you. Hope this helps. I could tell you lots more, I learned alot by breaking stuff and not having it work right, so I have built most of the setup at least twice.
Thanks
Brent

 

You have any pictures of your set up?