I wonder if the people who set up F.A.S.T. had any idea the extent to which people would go to build these things... and if it's even in the spirit of the original rules

Fast68,


Thanks for posting that thread about the modded 340 intake. I envisioned something similar for the thermoquad. I think the thing holding that design back is it needs a much larger plenum (both vertically from the carb and then the Horizontal 'Barrel' below) and it needs a much smoother angled transition from the plenum to the roof of the runners. That sharp edged 90 degree transition is going to kill flow and make the A/F really wonky trying to hold anything in suspension....how close can we model the shape and cross sectional area of a known good flowing single plane beneath the OEM casting?

But I gotta say I really applaud the tremendous effort that went into it!!


I remember talking with Tom Cannon years ago at I think it was the FAST event at the mopar nats in like 2004(?) that I thought a 71-72 TQ auto duster or Demon 340 would have a big advantage over a six pack cuda. Even if the total HP was a little down from the 6 pack the combo would have a huge advantage in much lighter weight, aerodynamics ( The challenger has one of the worst grille frontal areas....compared the Duster having one of the best, and the phenomenal natural weight transfer of the short front/long rear overhang of the duster. I think it's amazing to see that Duster going 10.30's ....but I'm really not surprised it's the quickest non-hemi Mopar combination.

I guess the best way to test and tune your FAST combination is to run your best "legal" combo and then swap on a known "good" manifold (like a Street dominator or a performer RPM) and see how much potential ET your really giving up...then grind and tune the manifold to try to close the gap as much as possible.

I thought Ed Cooks max wedge was knocking on a 9.99 ?

I wonder if the people who set up F.A.S.T. had any idea the extent to which people would go to build these things... and if it's even in the spirit of the original rules

Every minute spent on the intakes on a fast style car is worthwhile. I am so envious of aluminum intakes, welding cast iron is a very steep learning curve, everytime I think I know what I'm doing, the next piece acts completely differently. Knowing what I know now I've started another one this winter.

Can they run an aftermarket block like the hemis? 4.500 bores?

I still 100% believe FAST combos should be limited to a maximum of .060 over whatever the standard bore size was for the motor the car came with....I guess that cat is long out of the bag by now though.

What are you welding that with? Everytime I see more of these pictures I see new ways to access areas that can't be reached , your window in the side of the plenum to access that ugly acute angle opposite it. I have a 383 intake that I fully removed the underside of the lower plenum after accidentally cutting thru it when taking off the exhaust crossover passage , I was just going to plate it with a thin piece of sheetmetal .

BTW, it anyone wants to check it out, Dave Dudek exposed his version of the FAST Hemi intake on facebook this morning. 1000 hp.

[quote=Brad_Haak] There are some things being done now, especially by the Corvettes, that I don't think fit the spirit of the rules, and some are blatantly illegal. But I'm staying out of that since I'm no longer involved.

I watch the Horsepower Depot youtube channel. Are you referring to their cars? Very curious to hear your take on the subject if you can elaborate. I'd love for a HEMI to reclaim the crown. They have to be giving up tremendous weight to a corvette?

I watch the Horsepower Depot youtube channel. Are you referring to their cars? Very curious to hear your take on the subject if you can elaborate. I'd love for a HEMI to reclaim the crown. They have to be giving up tremendous weight to a corvette?

I used muggywelds rods that I took the coating off and used with a tig welder. I welded about a 1/2" of material to the outside of the worst corners, cut 4 windows and blew through the corners from the inside. I have another intake that is just a outside skin I milled everything out of, and was planning on doing something similar to what Rhet did, but 4 of the runners are so low due to the dual plane platform that there would have to be around a 3/4" upward angle to meet the head. In my mind I couldn't see how that would work so I aborted that project. This years intake I am changing the plenum a good bit and the approach to the runners.

I don't want to get sucked into a controversy by making a list. I had way more than my fill of that when I was on the board. If you read the rules, then look at the pictures and videos, there is major stuff that is not right. Stuff that probably amounts to 1 second or more. They even talk about some of the stuff in their videos.