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Old Mar 21, 2008 | 10:50 AM
  #41  
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Originally Posted by NemeSS
im thinking that a t4 1.10/1.25 a/r turbine housing, s475 would spool
rather decent on a 375ci-383 motor, 1800-2500 rpm
seems about right with a t4 housing?
It won't spool that quick, but it would be full tilt probably by 3200-3500 or so, also depending on the cam specs, compression and trans setup.
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Old Mar 21, 2008 | 11:28 AM
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awesome prices.
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Old Mar 21, 2008 | 05:43 PM
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So if i were to go with the S475 with the T6 1.10 housing right now would i have to change a bunch if i wanted to upgrade to a better BW turbo later? or are there better BW turbos that will fit in its place without any mods to piping given i run everything with plenty of clearence? my engine again is a 377 SBC with afr 210cc heads with 8.5 comp ratio cam specs are lobe sep 114, IVL .623 EVL .633 Duration at .050 I-250, E-256. trans is a coan th400 with stock gear ratios. pro tree trans brake and RMVB.

Last edited by SSinisterSS; Mar 21, 2008 at 05:57 PM.
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Old Mar 21, 2008 | 06:46 PM
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well i just got back from my tuning session with a friend who owns and tuned his own twin turbo ford gt. he gave me a ride and turbo is the way im going.

dr turbo-which of these turbos would go decently with a 347 and make around 700rw, and what would it spool like
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Old Mar 22, 2008 | 01:12 AM
  #45  
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S400 w/1.1
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Old Mar 22, 2008 | 07:41 PM
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DrTurbo, you either dodged or just plain ignored an important question earlier. so I will ask it again as I would love to hear a correct answer....what makes the budget s4xx units so much slower spooling than the fi s series units???
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Old Mar 22, 2008 | 07:52 PM
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I have an s475 and I assumed it was a bit slower to spool because of the big honking T6 hot sides. Great for strip but a little bit laggier for the street I'd guess.
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Old Mar 22, 2008 | 07:58 PM
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the fi units are available with 1.1 or 1.3 t6 hotsides also. I am asking for an answer based on an apples to apples comparison. 1.3 t6 to 1.3 t6.
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Old Mar 22, 2008 | 08:43 PM
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S200?
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Old Mar 23, 2008 | 09:14 AM
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I should have my s400 w/ 1.3 up and running in a few weeks.
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Old Mar 23, 2008 | 09:33 AM
  #51  
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Originally Posted by Hennytime
well i just got back from my tuning session with a friend who owns and tuned his own twin turbo ford gt. he gave me a ride and turbo is the way im going.

dr turbo-which of these turbos would go decently with a 347 and make around 700rw, and what would it spool like
The 75mm with either 1.1 T6 or 1.25 T4.
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Old Mar 23, 2008 | 09:36 AM
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Originally Posted by sr71
DrTurbo, you either dodged or just plain ignored an important question earlier. so I will ask it again as I would love to hear a correct answer....what makes the budget s4xx units so much slower spooling than the fi s series units???
Oiling is different, bearing, lightening, Zero balancing....etc..etc. Under extreme custom units, then you have gun drilled shafts, shaved wheels...etc
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Old Mar 24, 2008 | 07:19 PM
  #53  
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So if i were to go with the S475 with the T6 1.10 housing right now would i have to change a bunch if i wanted to upgrade to a better BW turbo later? or are there better BW turbos that will fit in its place without any mods to piping given i run everything with plenty of clearence? my engine again is a 377 SBC with afr 210cc heads with 8.5 comp ratio cam specs are lobe sep 114, IVL .623 EVL .633 Duration at .050 I-250, E-256. trans is a coan th400 with stock gear ratios. pro tree trans brake and RMVB.
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Old Mar 24, 2008 | 07:37 PM
  #54  
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You have to change the cold side some to make larger units work.
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Old Mar 24, 2008 | 10:39 PM
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Thanks for all the PM's DrTurbo! I appreciate your input...

I am leaning towards the S400-75 in either 1.3 or 1.1 T6. I am looking for 750 rwhp with room to grow. This will be for a 403 stroker ls2, 8.2:1 compression, zo6 cam, patriot lq9 heads, M6, custom rear mount setup in a 28xx lb car. This is for an all around street/drag/auto-x car.

Should I look into the T4 1.25? I would rather have higher top end that carries out to redline than spooling too quickly. Anyone else have any suggestions?

What are the dimensions of the S400-75? What size downpipe and compressor outlet are on this turbo?
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Old Mar 25, 2008 | 06:55 PM
  #56  
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Thanks Dr. Turbo ill will be contacting you or Jose soon.
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Old Mar 27, 2008 | 09:15 AM
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Originally Posted by Rhythm
Thanks for all the PM's DrTurbo! I appreciate your input...

I am leaning towards the S400-75 in either 1.3 or 1.1 T6. I am looking for 750 rwhp with room to grow. This will be for a 403 stroker ls2, 8.2:1 compression, zo6 cam, patriot lq9 heads, M6, custom rear mount setup in a 28xx lb car. This is for an all around street/drag/auto-x car.

Should I look into the T4 1.25? I would rather have higher top end that carries out to redline than spooling too quickly. Anyone else have any suggestions?

What are the dimensions of the S400-75? What size downpipe and compressor outlet are on this turbo?
to the top
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Old Mar 27, 2008 | 11:58 AM
  #58  
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I would go S480 with your setup on a 1.32.

Marty
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Old Mar 27, 2008 | 12:21 PM
  #59  
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Originally Posted by Rhythm
Thanks for all the PM's DrTurbo! I appreciate your input...

I am leaning towards the S400-75 in either 1.3 or 1.1 T6. I am looking for 750 rwhp with room to grow. This will be for a 403 stroker ls2, 8.2:1 compression, zo6 cam, patriot lq9 heads, M6, custom rear mount setup in a 28xx lb car. This is for an all around street/drag/auto-x car.

Should I look into the T4 1.25? I would rather have higher top end that carries out to redline than spooling too quickly. Anyone else have any suggestions?

What are the dimensions of the S400-75? What size downpipe and compressor outlet are on this turbo?
With a 403 and rear mount, you'll definitely want T4 housing around 1.00A/R. A T6 1.32 and big turbine wheel would be a pig, also being a 6spd car and only 2800 lbs would amplify that since load would be reduced.
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Old Apr 10, 2008 | 12:32 PM
  #60  
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408ci fully built, heads,cam, intake, TH400, 3800 stall.

Which would be the best turbo setup?

either
Twin S400-72 T4 1.10 A/R or other

Or
Single S400-80 T6 1.32 A/R or other.

I can not make up my mind to go single or twin at these prices anywayz the doors wide open.
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