View Poll Results: Single or Twin Turbo
Single
50.00%
Twin
50.00%
Voters: 16. You may not vote on this poll

Turbo Help

Old 01-20-2008, 01:01 AM
  #1  
Grimace
Junior Member
APPRENTICE
Thread Starter
 
Join Date: Nov 2007
Posts: 21
Default Turbo Help

I wanna building a turbo sbc!!!!! Its goin to be a street/strip car! I dont know much about turbos!! Whats better for my set up twins or single! HELP

Its a 355 SBC

these internals:

http://store.summitracing.com/partde...%2D300&FROM=MG

other than

Stock Crank

Stock Rods

These Heads:

http://store.summitracing.com/partde...5&autoview=sku


I dont know what to do for a cam, intake ,& carb.. If you see something i should change let me know.
Grimace is offline  
Old 01-20-2008, 01:56 AM
  #2  
olds48
Senior Member
RACING JUNKIE
 
Join Date: Sep 2007
Location: Montvale, VA
Posts: 1,431
Default

What will your compression ratio be?
olds48 is offline  
Old 01-20-2008, 02:51 AM
  #3  
lookingaround
Senior Member
RACING JUNKIE
 
Join Date: Feb 2006
Location: Lenoir City Tennessee
Posts: 865
Default

what kind of boost you planning on running? i think id change the rods and pistons if it were me. i dont think stock parts would hold up to long.
lookingaround is offline  
Old 01-20-2008, 07:59 AM
  #4  
us7race
Senior Member
EXPERT BUILDER
 
Join Date: Aug 2005
Location: Tell City, IN
Posts: 356
Default

I think the twin turbo would make too much power for a stock crank and rods...I have seen a single turbo setup run 5.66 in the 1/8th with a stock 400sbc block (aftermarket internals) didn't make too many passes and split the block in half. You could play with a single turbo for awhile if RPM's were kept down.. Just my opinion. Turbo's are the way to go as far as HP but the cost is outragous.
us7race is offline  
Old 01-20-2008, 12:20 PM
  #5  
Grimace
Junior Member
APPRENTICE
Thread Starter
 
Join Date: Nov 2007
Posts: 21
Default

I know alot of import guys and they are all switching from twins to one BIG single! Whats better for the track? 9 to 1 and boosting @ 5 to 8 psi!
Grimace is offline  
Old 01-20-2008, 12:42 PM
  #6  
olds48
Senior Member
RACING JUNKIE
 
Join Date: Sep 2007
Location: Montvale, VA
Posts: 1,431
Default

I know very little about turbos,but have read alot about them concerning diesel trucks.Far as I can tell,the idea with them is a 2 stage turbo.One smaller one to help spool up quicker and then a larger one to carry it out with the upper rpms,when you need more airflow.I wouls think that a twin turbo would probably be better.2 small ones that spool up quick,bit together can move some serious air.Of course two cocts more than one.A guy at my track has a 302 fox body Mustang and he adapted a Ford 7.3L Powerstroke turbo to his.HE LITERALLY USES A COFFEE CAN FOR THE AIR BONNET :shock: .I looks crude buy he runs low 6s.And that truck turbo really screams.It is awesome.For the track,with a loose converter,I'd say one biggun.For the street,I'd say stay small.Just my $.02
olds48 is offline  
Old 01-20-2008, 01:14 PM
  #7  
OneBadGMC
Senior Member
RACING JUNKIE
 
Join Date: Sep 2007
Location: Belleville, IL
Posts: 658
Default Re: Turbo Help

Originally Posted by Grimace
I wanna building a turbo sbc!!!!! Its goin to be a street/strip car! I dont know much about turbos!! Whats better for my set up twins or single! HELP

Its a 355 SBC

these internals:

http://store.summitracing.com/partde...%2D300&FROM=MG

other than

Stock Crank

Stock Rods

These Heads:

http://store.summitracing.com/partde...5&autoview=sku


I dont know what to do for a cam, intake ,& carb.. If you see something i should change let me know.
You just want to build one to say you did it, or do you actually want it to run like it has a turbo?

If it runs like it has a turbo with those parts, it won't run long.
OneBadGMC is offline  
Old 01-20-2008, 02:40 PM
  #8  
feenst
Junior Member
JOURNEYMAN
 
Join Date: Oct 2004
Posts: 29
Default

Twins should build boost quicker.
A single should maintain the boost better on gear changes.
I personally like twins because they simplify the plumbing on a V-8.
Check out ebay for cheap twin turbo kits that will make the kind of boost you're looking for.
feenst is offline  
Old 01-20-2008, 03:58 PM
  #9  
Grimace
Junior Member
APPRENTICE
Thread Starter
 
Join Date: Nov 2007
Posts: 21
Default

Car Craft had Marty Stromberger's stock-block SBC, twin-turbo 1988 Pontiac Firebird GTA . See "Hard Core, in the November 2007 Car Craft at pp. 76-80. Its went 9.75 at 141 with an ancient, used, 150,000-mile two-bolt/cast crank short-block and crappy 487X heads ." Thats what gave me the idea! Im not lookin to go that fast i just want to run some mid 11s!
Grimace is offline  
Old 01-20-2008, 08:21 PM
  #10  
Grimace
Junior Member
APPRENTICE
Thread Starter
 
Join Date: Nov 2007
Posts: 21
Default

Thanks for all the comments! What will be good size turbos to go with? Like i said its just goin to be a street/trip car low to mid 11s would be ideal!
Grimace is offline  

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service