help me size a turbo for 393 blow thru - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 9 Old 10-04-2007, 10:09 AM Thread Starter
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Exclamation help me size a turbo for 393 blow thru

This is for a 393ci carburated blow through set up that is currently supercharged. This is a friends car...he sold the blower and is going home built turbo route and we are unsure what size turbo to look for. I am not familiar with a/r ratios and figure someone on here could give us a hand .

393ci 8.5 cr
Victor Jr intake
holley carb modified for blow through
TFS TW heads stock
hyd roller cam
C4 trans 3.73 rear
weight 3,300lbs

it's going to be street/strip...heavier on the strip. no a/c or power steering. It made 601 RWHP with an S-Trim. Looking to make ~800rwhp. Give me some suggestions on style/size of compressors. Would consider twins as well.


94 Cobra 327ci T-trim
4R70W UCC 9.5 converter
6.86 @104
Holley HP EFI
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post #2 of 9 Old 10-04-2007, 10:19 AM
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You will need an 88-100mm single
or twin 60-62mm

Only problem with the single is they are HUGE when you get to that size.

I found it was going to be easier to install 2 smaller turbos and downpipes
instead of one huge turbo and 3.5"-4" downpipe.
The twins will also spool a just little quicker.


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post #3 of 9 Old 10-04-2007, 10:22 AM
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I just bought twin precision SC-61s

2007 Mustang GT
Whipple'd
1987 Mustang GT T-Tops
408W Twin turbo
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post #4 of 9 Old 10-04-2007, 11:55 AM
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What do you guys think about these turbos?

(2) brand new, never installed T04E turbos for sale. They are T3/T4 hybrids with A/R ratios of .63 on the turbine side and .50 on the compressor side.
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post #5 of 9 Old 10-04-2007, 02:27 PM
 
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single PT78 with .96 exhaust housing. Turbo will support 1200fwhp. Personally I am a fan of the twin setup. Just like others stated spool easier and just plain out cool. We are putting twin pt74's with .96 exhaust housings on my coupe. Here is a pic of them


Last edited by Newt-Rod; 10-04-2007 at 02:29 PM.
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post #6 of 9 Old 10-04-2007, 05:37 PM
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How much did you pick those up for?
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post #7 of 9 Old 10-05-2007, 01:23 AM
 
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Quote:
Originally Posted by Blown85hatch View Post
How much did you pick those up for?
if you are speaking to me about the pt74's we are a precision dealer. I can get you a price for them. I need to know what inlet you want. Those are bellmouth turbos.
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post #8 of 9 Old 10-20-2007, 06:45 PM
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s400 all the way
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post #9 of 9 Old 10-20-2007, 06:59 PM
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Twin GT_35's will do the trick...
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