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Old 04-18-2020, 11:43 AM
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TCSGTO TCSGTO is offline
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Join Date: Dec 2000
Location: Warren,Ohio,USA
Posts: 1,686
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Quote:
Originally Posted by Steve C. View Post
On the 535 engine I linked the the best configuration on the dyno used the MODIFIED Torker II intake with an 850-cfm Quick Fuel carburetor. It was better than a Victor intake with a larger, 1,150-cfm Dominator carburetor. But again a 'small' hydraulic roller cam. Dave Bisschop's testing has suggested a Northwind intake tested better than a Victor intake, and note his 535 had a solid roller cam that suggests not much more intake duration than Ken Crocie's 535 combo linked. I say not much more because the exact cam specs are super squirrel information and not listed. And note both used Dave's 345 cfm heads.

"We've dynoed this combo in the past and were basically stuck in the 650-660hp range with a ported Torker II and 1" spacer, the new Northwind looks like it's worth 30-40 hp more and is right there with the Victor and then some for this application."

Dave's testing: [url]http://www.sdperformance.com/newsStory.php?newsID=53[/url
.
The cam used in the SD Northwind tests was a HR with “mid 250’s/260’s” duration. He’s tested some other large HR grinds in the bigger engines with 340cfm heads that make well over 650HP and are suppose to be very streetable. I may eventually try one out.

__________________
68 GTO,3860#
Stock Original 400/M-20 Muncie,3.55’s
13.86 @ 100
Old combo:
462 10.75 CR,,SD 330CFM Round Port E's,Old Faithful cam,Jim Hand Continental,3.42's.
1968 Pontiac GTO : 11.114 @ 120.130 MPH

New combo:
517 MR-1,10.8 CR,SD 350CFM E's,QFT 950/Northwind,246/252 HR,9.5” 4000 stall,3.42's
636HP/654TQ
1.452 10.603 @ 125.09
http://www.dragtimes.com/Pontiac-GTO...lip-31594.html