Crossfire SRT6 A place to discuss SRT-6 specific topics.

Startech 4.4s

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Old Jan 17, 2014 | 11:05 AM
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Mr.Newton's Avatar
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From: Dortmund, GERMANY
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Last edited by Mr.Newton; Mar 24, 2016 at 02:41 PM.
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Old Jan 17, 2014 | 12:13 PM
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S. Artee's Avatar
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Default Re: Startech 4.4s

Very exciting! Looking forward to updates.
 
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Old Jan 17, 2014 | 12:22 PM
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JHM2K's Avatar
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Default Re: Startech 4.4s

This thing isn't even completed, and it's already my favorite Crossfire.

NICE!!!!
 
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Old Jan 17, 2014 | 12:52 PM
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FUBU's Avatar
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Default Re: Startech 4.4s

Want to buy my koni dampers? Used 100 km. ?
 
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Old Jan 18, 2014 | 12:56 PM
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Default Re: Startech 4.4s

On first read......drool.....
Amazing that you can access all that stuff and it all looks..... so....neat.....

I'm guessing this is based upon the 96.8mm bore E37, but with what seems to be a 100mm stroke? (stock E37=84mm) - I think that means proportionaly more power but maybe not so much more torque.

However, that sucker will be wanting to be fed some serious air, did you ever consider the SL55 supercharger on it?
No mention of a DCAI?


.....change - previous calcs under review....
will repost shortly....
 

Last edited by Billy22Bob; Jan 18, 2014 at 04:28 PM.
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Old Jan 18, 2014 | 04:41 PM
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Mr.Newton's Avatar
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From: Dortmund, GERMANY
Default Re: Startech 4.4s

Hey,

thanks for your detailed information.
At first I will go with the stock 74mm sc pulley and see how it works, possible to go smaller with a 68mm or 65mm one, depends on the efficiency of the supercharger.
I´ve already stage 2 in my mind- modified AMG 55 supercharger ;-)

btw: bore: 99,5mm stroke: 93mm
 
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Old Jan 18, 2014 | 06:27 PM
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sk8erjosh09's Avatar
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Default Re: Startech 4.4s

Holy Geez...
 
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Old Jan 20, 2014 | 07:05 AM
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Billy22Bob's Avatar
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Default Re: Startech 4.4s

Had a bit of a recalc.

Asuming you've taken care of compression ratio considerations......

I admire the intent and the challenge, As we say here - you lucky, lucky *******....

.... however....
I think you'll find you'll only get about 6psi boost and 600cfm capability = horse power - with the 74mm/155. That's is similar to a stock setup SRT6/SLK32 at 14.5psi and 610cfm.

Due to the larger engine volume you won't be hitting pressure ratio (heat) issues with the stock IHI S105 1.4L SC - so can I talk you into considering a 181 crank straight up* (with all the requisite underdrive pulleys). That should yield you nearer10psi and 720cfm...now you're starting to talk some serious hp (>410).

After enjoying that for a while, then you can slip on the 65 for13psi ~830cfm
You can leave it at that unless you're going to drive the SC to destruction (17,516 rpm) with a 181/62mm setup for a neat 14psi and 870cfm +++ over 500 bhp.

Awesome - Good times and Good luck!
 
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