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Re: N41, f303, xe274hr cams

Well, most dyno data that I get back shows the GT40 style intakes peak ~5,500 rpm. I'm not sure how much better a car performs by adding 500 rpm to the top if it looses some mid range to get there. Below is a link to dyno graphs in an article I wrote on ported GT40 style intake results so you can se...
by Tmoss
Sun Oct 02, 2016 10:13 am
 
Forum: Foxbody Tuning
Topic: N41, f303, xe274hr cams
Replies: 3
Views: 445

Re: Porting the 5.8 GT40 lowerr

Yes, the length and limited cross section of all 3 of the GT40 style uppers is the choke point on bigger engines, the 9.2 deck Lightning 351W lower is a GREAT piece, far better than the 8.2 deck model. If hood clearance is not an issue, I like the TFS-R Box on larger cubes. The EFI Super Vic is also...
by Tmoss
Mon Oct 05, 2015 5:33 pm
 
Forum: TMoss Porting
Topic: Porting the 5.8 GT40 lowerr
Replies: 12
Views: 2556

Re: Porting the 5.8 GT40 lowerr

The Lightning lower flows about 275 cfm stock and once ported to a 1262 size port, it will flow over 300 cfm. So, it is the Lightning lower that is the big choke point at about 260 cfm. On a 408, I'd suggest running it with a GT40 style box upper if you want more power, like the Cartech/Downs or Com...
by Tmoss
Sun Oct 04, 2015 8:55 pm
 
Forum: TMoss Porting
Topic: Porting the 5.8 GT40 lowerr
Replies: 12
Views: 2556

Re: Polyquad porting for Ford Heads

Excellent article - I have not heard a peep about this on any Ford forums I visit, but then again I don't go into the modular forums. It would be great to see a manufacturer or machine shop based business licence this for the 3 valve heads (and 4 for that matter) and get the cost into a more afforda...
by Tmoss
Wed Jan 29, 2014 2:15 pm
 
Forum: TMoss Porting
Topic: Polyquad porting for Ford Heads
Replies: 4
Views: 2248

Why Port an EFI Lower or a Carb Intake?

EFI and Carb Intakes We have ported most commercially available past and present intakes. Ford, Chevy, MoPar, Edlebrock, Holley, Canfield, Offenhauser, Saleen, Trick Flow, Weiand, etc. We have pictures and flow data on almost all the intakes we have done in the last 8 years since setting up an Audi...
by Tmoss
Tue Jan 21, 2014 2:52 pm
 
Forum: TMoss Porting
Topic: Why Port an EFI Lower or a Carb Intake?
Replies: 0
Views: 1240

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