big block turbo sizing

[foxbodydave]

ive recently aquired a free complete 460 out of a 70's truck. i wanna try my hand in the turbo arena next year and im curious as to what size turbo would be sized right for the motor. i would keep the stock crank and rods, and put forged pistons in it as well as a cam. id like to be at about 800 hp and the same for tq....also what size carb would be needed.

[Sean]

s400 borg warner with a big hotside.Would make a bit more power with the 80mm upgrade but the box stock s400 is plenty capable as well. It will be a short early power curve in the 5600rpm range using such a small compressor.

[MavisBeacon]

If your considering trying to make 800 hp, you really should look into upgrading the stock rods. Also, if you haven't already check out www.460ford.com There is a lot of useful information there.

[foxbodydave]

i have been lookin on there for a couple days now. i thought i remember reading how the stock rods were really strong as well as the crank. i wanna do it right the 1st time so i guess it would be cheap insurance
If your considering trying to make 800 hp, you really should look into upgrading the stock rods. Also, if you haven't already check out www.460ford.com There is a lot of useful information there.

[foxbodydave]

how would the turbo off of a 7.3 powerstroke work on that motor? i can get one for free pretty much...

[Sean]

powerstroke turbo will come up way way short

[cjmatt]

i was looking at the same thing for my lincoln, rods gotta come out too.

[LTLHOMER]

Buy the biggest one you can find in your price range. That's a big motor to only try to make 800 hp with...

[Sean]

stock blocks get iffy at 900-1000hp. With alot of prep a few have survived at 1200hp. There are a few blocks that can do it but not many. www.460ford.com (http://www.460ford.com) has alot of great info.

Buy the biggest one you can find in your price range. That's a big motor to only try to make 800 hp with...

[strokedhatch]

i would go with at LEAST the S488 which is an 88mm, the 460 is going to move ALOT of air and i dont think the 80mm will be efficient enough..

just my .02

[FiveFour2000GT]

i would say 80 to 100 mm

[Hugger Z]

Well if you read up on turbo's you are supposed to look at the exhaust air exiting the engine at a certain rpm (can be calculated) and compare the turbo map to see if it is within the ideal airflow range for that housing. It will at least tell you if you are close with a certain turbo or not. It's good that you have a HP target as that is what starts many of the calculations.

You can read Maximum Boost by Corky Bell and it has good basic info for learning all that stuff. I would post the formulas but that book is at home.

[Sean]

Volumetric efficiency and RPM factor in heavily. for a low rpm motor you may want entirely different things vs a higher rpm engine. Also certain turbos may easily max out the potential of parts IE a stock block.

while a 106mm turbo would be absolutely baddass on a 514 BBF a stock block can;t take that much power.


Well if you read up on turbo's you are supposed to look at the exhaust air exiting the engine at a certain rpm (can be calculated) and compare the turbo map to see if it is within the ideal airflow range for that housing. It will at least tell you if you are close with a certain turbo or not. It's good that you have a HP target as that is what starts many of the calculations.

You can read Maximum Boost by Corky Bell and it has good basic info for learning all that stuff. I would post the formulas but that book is at home.

[foxbodydave]

isnt a stock 460 block good till around 1000 hp?

while a 106mm turbo would be absolutely baddass on a 514 BBF a stock block can;t take that much power.[/QUOTE]

[MystryGuy]

106 would be well over 1000hp in the correct setup. I'd start with two powerstroke turbos or hx35's. It should net plenty of power!

[MystryGuy]

http://detroit.craigslist.org/pts/1241501593.html or this

[OnyxSSS]

http://detroit.craigslist.org/pts/1241501593.html or this

thats a big ass turbo! but great price.

[cobra tom]

think 91mm

[strokedhatch]

i would have to agree with with the 91mm

[foxbodydave]

what about a good solid roller cam for that size turbo

[ls1sleeper]

thats a big ass turbo! but great price.

i think that was my turbo i still got in forsale

[Pure84GTT]

the fuel systems gunna cost more than your previous car

[foxbodydave]

trust me i know. this is going to be a very long term project. i plan on it taking 5 years or so....

[Blown528hemi]

Get two smaller ones next to one larger one... turbos take time to spool up... two smaller ones would make more power in the lower rpm range.