CLASS RACER FORUM - View Single Post - How does a 428W crate motor run regular SS?

novassdude · 03-22-2011, 07:02 PM

I did question them on how the 4.6L 3V got the HP rating it did. This is the response I got from Bruce.

Let me give you some info on the Ford 281 CID 4.6L 3 valve engine as it relates to the NHRA. NHRA Stock eliminator racers are Limited to Model,engine combinations that are accepted/approved by the Technical Services Dept. This is done via an extensive

TI ( Techincal Information ) form. That is each engine component is evaluated and approved.

Ford 2008 4.6L engines approved for use in the Cobra Jets.

300/281 CJ coupe

325/281 CJ Bullitt

430/281 CJ Roush Stage 3 coupe

510/281 CJ P51 coupe

All of these engnes are pretty much the same: IE 2@57 MM throttle body,dish piston, 2@1.340 and 1@ 1.500 valves,

Same cylinder head # RF3L3E-6040 K.

Ford 2010 4.6L engine approved for use in the Cobra Jet.

235/281 CJ coupe. Same engine except throttle body. 2@62.5MM.

None of the above combinations have been or are currently being used in Stock Eliminator.

Ford has no plans to submit any combination for the 2011 season.

There will be Cobra Jets in 2012, but no 4.6L engines only the 330 and 302.

Bruce Bachelder

The answer I got makes no sense to me Basically he says it is the same as the 300hp version with bigger throttle bodys. Yet it is 65 hp less.
I sent a follow up asking how it could be less with the bigger throttle body but as of yet I did not get a responce to that question.
He has been very prompt in answering question.

03-22-2011, 07:02 PM	#32
novassdude Senior Member Join Date: Mar 2002 Location: usa Posts: 752 Likes: 204 Liked 136 Times in 49 Posts	Re: How does a 428W crate motor run regular SS? I did question them on how the 4.6L 3V got the HP rating it did. This is the response I got from Bruce. Let me give you some info on the Ford 281 CID 4.6L 3 valve engine as it relates to the NHRA. NHRA Stock eliminator racers are Limited to Model,engine combinations that are accepted/approved by the Technical Services Dept. This is done via an extensive TI ( Techincal Information ) form. That is each engine component is evaluated and approved. Ford 2008 4.6L engines approved for use in the Cobra Jets. 300/281 CJ coupe 325/281 CJ Bullitt 430/281 CJ Roush Stage 3 coupe 510/281 CJ P51 coupe All of these engnes are pretty much the same: IE 2@57 MM throttle body,dish piston, 2@1.340 and 1@ 1.500 valves, Same cylinder head # RF3L3E-6040 K. Ford 2010 4.6L engine approved for use in the Cobra Jet. 235/281 CJ coupe. Same engine except throttle body. 2@62.5MM. None of the above combinations have been or are currently being used in Stock Eliminator. Ford has no plans to submit any combination for the 2011 season. There will be Cobra Jets in 2012, but no 4.6L engines only the 330 and 302. Bruce Bachelder The answer I got makes no sense to me Basically he says it is the same as the 300hp version with bigger throttle bodys. Yet it is 65 hp less. I sent a follow up asking how it could be less with the bigger throttle body but as of yet I did not get a responce to that question. He has been very prompt in answering question.