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-   -   427 SR/TW Roush ? (http://www.clubcobra.com/forums/small-block-talk/106127-427-sr-tw-roush.html)

vipertocobra 08-12-2010 11:12 AM

427 SR/TW Roush ?
 
Has anyone upgraded to a bigger carb? I have heard that the 950 Holley works great... any experience? John

henrik 08-12-2010 11:25 AM

Quote:

Originally Posted by vipertocobra (Post 1070959)
Has anyone upgraded to a bigger carb? I have heard that the 950 Holley works great... any experience? John

:D If you ask Jerry from Suncoast Cobra he will tell you how much better it works :D

As it happens It was on brd 602 when I got it - installed by Ted from Suncoast... I changed it to EFI in order to meet European standard - and get the Weber look...

If you are interessted I left the whole package ( polished Edelbrook, Holley 950, aircleaner +++) with Jerry - it is as new and will fit 100% on your engine...

http://www.clubcobra.com/classifieds...t=2763&cat=500

and this post where you made a comment ..

http://www.clubcobra.com/forums/show...hlight=native1


KInd regards
Henrik

SwiftDB4 08-14-2010 09:58 AM

Quote:

Originally Posted by vipertocobra (Post 1070959)
Has anyone upgraded to a bigger carb? I have heard that the 950 Holley works great... any experience? John

Don't know that the 427SR/TW warrants that big a carb. If it's for drag use maybe, but street I would think not. I have the same motor in my SPF GT40. I do track days with it. Swapped the Holley 770 vacuum carb out for a Quick Fuel 750 mechanical. With a wideband A/F meter it is pretty easy to dial in jetting. Also the Quick Fuel allows a lot more adjustability than the Holley. The gas mileage is actually about the same as the Holley vacuum.

vector1 08-14-2010 11:54 AM

the holley 950 has a 750 body and an 850 base.

the holley 1000 is an 850 with shaped airhorn.

henrik 08-14-2010 01:37 PM

Quote:

Originally Posted by SwiftDB4 (Post 1071368)
... If it's for drag use maybe, but street I would think not.

Well, the former owner of 602 was demonstratiing that street was working more than fine... :rolleyes:

WardL 08-14-2010 02:09 PM

I bought my SPF Roush 427 SR TW used. The original owner was not happy with the original Carb and bought a Bigs 750 CFM Stage 5, no choke. He was much happier with the new one. I get almost 15 mpg easy freeway, 12.5 average, really bad when on it. I'm very happy with the set up, but I have nothing to compare it to.

jhv48 08-14-2010 06:36 PM

Same engine as you.

Pro Systems is recommending an 830 CFM DP for my use.


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