ST80 on 347ci !!

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Sep 18, 2010 | 07:18 AM

venom ws7

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From: EARTH

ST80 on 347ci !!

Just like that title says What do you guys think

Turbo is
t4 1.10ar 80mm hot side 83mm cold side with the race cover
3inch downpipe.

Engine is built 347ci 8:5 Brute Speed cam stock LS6 intake for now.
heads will be either new 230 AFR or PRC 227 still didnt make a choice.
M6 Trans with stock 3.42 gears.

I'm looking for 680-730rwhp on pump and 850+rwhp on race gas and high boost..

How laggy will the turbo be ? I dont mind a little lag my old STS twin turbo making full boost at 3800-4000rpm.

What size waste gate should I use?? What BOV?

Let me know what you guys think I dont want to regret the order.

Hussam.

Sep 18, 2010 | 09:11 AM

trans2000am

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From: detroit

i think it will be fine, is it divided housing? could use a quick spoolvalve also.

Sep 18, 2010 | 09:54 AM

venom ws7

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From: EARTH

Quote:

Originally Posted by trans2000am

i think it will be fine, is it divided housing? could use a quick spoolvalve also.

Thanks .
I bet the ST80 Spools awesome with your 370ci and TH400.

Did you ever dyno the car or took to 1/4?
At what RPM do you see full boost?

Sep 18, 2010 | 11:08 AM

mike13

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From: Lake Tapps, WA

I ran a spool valve on my ST80, I just posted one in the classifieds if your interested.
https://ls1tech.com/forums/parts-cla...ool-valve.html

Sep 18, 2010 | 11:45 AM

blk00ss

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From: Jasper, AL

Need more compression!

Sep 18, 2010 | 12:25 PM

kbracing96

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From: Sutherlin OR

I ran the plain S480 with 83mm turbine and 1.10 T6 housing on my 346 here's a couple vids.

Sep 18, 2010 | 04:06 PM

venom ws7

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From: EARTH

Quote:

Originally Posted by mike13

I ran a spool valve on my ST80, I just posted one in the classifieds if your interested.
https://ls1tech.com/forums/parts-cla...ool-valve.html

I wanna run it 1st without the spool valve.
Thanks.

Quote:

Originally Posted by blk00ss

Need more compression!

I thought about it but I really dont want to run low timing or race gas all the time since we only have crappy 92octane around here.

Quote:

Originally Posted by kbracing96

I ran the plain S480 with 83mm turbine and 1.10 T6 housing on my 346 here's a couple vids.

Thanks for the vids man I'm sure the auto trans helped the spool.

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Sep 19, 2010 | 12:11 PM

venom ws7

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From: EARTH

Quote:

Originally Posted by Rickys S/C Z28

im doing he same thing but with more compresstion should be done in a few weeks

How much compresstion? What trans and rearend?

Keep us posted Ricky

Sep 19, 2010 | 01:11 PM

#10

Josh@KY-Turbo

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Quote:

Originally Posted by venom ws7

How much compresstion? What trans and rearend?

Keep us posted Ricky

Roughly 10:1
4l80e
8.8 rear.

Sep 19, 2010 | 10:12 PM

#11

venom ws7

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From: EARTH

Quote:

Originally Posted by Josh@KY-Turbo

Roughly 10:1
4l80e
8.8 rear.

Josh what fuel are you guys planning to run with this setup? Boost?
I'm sure the stalled auto and higher compresstion will help to spool the turbo faster than M6 and 8:5 comp

What do you think??

Thanks.

Sep 19, 2010 | 10:23 PM

#12

Zombie

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From: Las Vegas

Here is another video, but it's a 1.25 a/r SX80 T4 flange. It's rear mounted and was run without the quick spool valve. Still spools pretty decent, this was also on 91.

http://www.streetfire.net/video/borg...-up_637926.htm

Sep 19, 2010 | 10:43 PM

#13

venom ws7

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From: EARTH

Zombie thats not bad at all..
Turbo I'm getting is 80mm Compressor, race cover, 83mm turbine, 1.15 a/r

I'm going for it if the spool was soooo bad I'll go with 3.73 gears 27" tires and 7000rpm

Sep 19, 2010 | 10:57 PM

#14

Zombie

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Quote:

Originally Posted by venom ws7

Zombie thats not bad at all..
Turbo I'm getting is 80mm Compressor, race cover, 83mm turbine, 1.15 a/r

I'm going for it if the spool was soooo bad I'll go with 3.73 gears 27" tires and 7000rpm

The 3.42 gears would be better than 3.73's, at least 3.42's were much better in my 6 speed days when I went from 4.10's to 3.42 the car spooled much better.

Both 1320 and I ware surprised how well the SX80 spooled with the 1.25 a/r on my car. It's not lightning fast like everyone wants, but was acceptable and much better than the T76 I use to have on my Supra.

If I were to redo that test without the quickspool valve now it would spool even faster due to having the exhaust better insulated. Once you add a valve though, the car becomes completely different. In cool weather I can actually get into surge at part throttle it spools so fast. Surge is never an issue in summer though due to spooling slower. In cool weather my car spools similar to a stock SRT-4.

Sep 19, 2010 | 11:13 PM

#15

venom ws7

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From: EARTH

Thanks for the info..

What about the waste gate and BOV what did you use?

Sep 20, 2010 | 12:41 AM

#16

bad6as

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From: Maryland

fan of jgs wg and bov

Sep 20, 2010 | 04:17 AM

#17

Zombie

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From: Las Vegas

Quote:

Originally Posted by venom ws7

Thanks for the info..

What about the waste gate and BOV what did you use?

Tial WG, no BOV, use to run a Tial BOV, no need for one on an auto and the damn thing leaked on me a few times due to the o-ring, much nicer not having to worry about it leaking.

Sep 20, 2010 | 07:40 AM

#18

AutomagicLS1

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From: Spring Hill,Kansas

I have a T6 GT-88 1.08 on my 347. Car has a th400 w/ 3.00 gears. It makes boost really quick from a roll even w/o brake boosting. From a stop I can build about 4lbs on the footbrake. On the transbrake it will build about 8

Sep 20, 2010 | 09:29 AM

#19

JAX04

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From: Indy

Quote:

Originally Posted by Zombie

did you ever post any vids with the spool valve??

EDIT: Never mind, found it, i thought i remembered seeing one, that valve made a huge difference.

hope you dont mind, lol.

this is the one i found.

http://www.streetfire.net/video/new-...ipi_739094.htm

Last edited by JAX04; Sep 20, 2010 at 09:34 AM.

Sep 20, 2010 | 10:15 AM

#20

Rickys S/C Z28

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From: MOREHEAD KY

Quote:

Originally Posted by venom ws7

going to be on 93. and when it goes to the track it will be on 116. i hope to make 20 psi but we will see.

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ST80 on 347ci !!

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