Ya gotta be kidding...

[RJ Sledge]

Bill where you been??? The 2010 426 hemi challenger and the 2014 427/430hp COPO are basically the same as far as cr., engine size, camshaft specs, etc.!!

We have been talking to Kuntz about the Combo and you are right, it won't be inexpensive to build. If you are going to run FS/B with a Ford, its the Combo to run.

Should be a bad boy once you get it sorted out.

Now If I can just get those ping pong balls to line up right!!!

RJ

[Jeff Teuton]

I need that 1800 cfm throttle body. I gotta get that for the Mopar. We only got 1600.

[Billy Nees]

What I find more amazing than the "new 429" in the new Mustang is that Chrysler/Fiat found an engine combination that they never knew they put in a "limited production, not for street use" car five years after they built them. Now THAT has to be a "limited production"!

[Bill Harris]

Yeah, I gotta admit I haven't been keeping up with all the latest factory stuff. I have been looking at the Ford specs occasionally but haven't ever looked at the stuff from the dark side. The last Ford engine I considered was the 2010 352, but since my latest race engine efforts have left me broken and broke, I have pretty much quit racing altogether. I can't seem to stay away from Class Racer website though.

[Jeff Teuton]

Billy, not only are these special cars out there, they are going to allow us to move the rear wheels forward to be the same as the Copo and SC Mustang. Now if we can just get the Injectors Tubes sticking out the hood.............

[Billy Nees]

Originally Posted by Jeff Teuton

Billy, not only are these special cars out there, they are going to allow us to move the rear wheels forward to be the same as the Copo and SC Mustang. Now if we can just get the Injectors Tubes sticking out the hood.............

Jeff, 2% rule?

[Rat Raceway]

1800cfm is one big Throttle body!

Best I can find on Throttle body flow per size...

65mm Throttle Body 745 CFM - 3.125" OD
70mm Throttle Body 830 CFM - 3.125" OD
75mm Throttle Body 915 CFM - 3.125" OD
80mm Throttle Body 965 CFM - 3.500" OD
90mm Throttle Body 1170 CFM - 3.750" OD
95mm Throttle Body 1450 CFM - 4.250" OD
105mm Throttle Body 1520 CFM - 4.250" OD



The 2012 and 2013 COPO's have 102mm and the 2014 COPO has a 90mm Throttle body.(427 motors)

[Jeff Teuton]

The Mopar's use a 4 hole 1 3/4 in on the DP's which is the same size as 750 CFM 4150 series carb, but it is rated @ 1000 cfm. The 426 Hemi uses a 2" which is the same as a 4500 series base and is rated @ 1600 cfm. Course we are only flowing air. The Copo 427 single blade has a slightly larger area than the 2" 4 bore that we use.

[Jesse Kershaw]

The 429 is our answer to the 426 Hemi, and the 427 Chevy. The cam lift is line on line with the Hemi combo.

The throttle body is our off-the-shelf unit. Big but front entry as opposed to the scoop of the Hemi. I consider it a wash. Likewise the head is 12 year old NASCAR tech but it's off-the-shelf as well. However the 429 is at .650" lift while the NASCAR engines are over 1". Huge difference! It becomes an apples and oranges argument trying to compare the engines.

These engines are designed specifically for Factory Showdown. It should be very fun and exciting, and not affect any older combos as the natural class is BB. The Dodge guys are dominating FS/B right now and we want to mix it up a little. The point is to promote Stock racing and help Factory Showdown grow, having all 3 makes in is a big part of that.

Hopefully Chevy ups their ante with a .650" lift SOLID lifter cam and maybe a CNC port on their intake like the Dodge has and we should be VERY level in performance.

I think we've got the best teams running Ford's (although I do like the Barton and Teuton teams) and I'm excited for Indy. I hope the Chevy guys get a combo that gives them the specs to be right inline with the Ford and Mopar so we can stop the paperwork exercise, get to work and settle this on the track.

[Rory McNeil]

Originally Posted by Jeff Teuton

The Mopar's use a 4 hole 1 3/4 in on the DP's which is the same size as 750 CFM 4150 series carb, but it is rated @ 1000 cfm. The 426 Hemi uses a 2" which is the same as a 4500 series base and is rated @ 1600 cfm. Course we are only flowing air. The Copo 427 single blade has a slightly larger area than the 2" 4 bore that we use.

Also, your 4 1 3/4" throttle blades are not encumbered by venturis and boosters getting "in the way". Thus the higher flow ratings.