Questions about Cobra Jet 5.0
 

Let me just say does anyone know if this would be the "legal" motor?

http://mustangsdaily.com/blog/2011/0...ate-engine-na/

Re: Questions about Cobra Jet 5.0
 

Probably the engine from Ford Racing would a good start but is probably not an NHRA legal stock engine as is. I think many of your assumptions about Ford Racing helping many racers are different than they really are, but they probably couldn't help you because the person you contacted may not have known the answer you were looking for. Ford Racing gave the racers a good start with the products they provided but then the racers took the cars to the next level. I think the loop you refered to doesn't exist but the NHRA Engine Specs should have some of the answers you are looking for on the engine.

Re: Questions about Cobra Jet 5.0
 

Thanks good advice

Re: Questions about Cobra Jet 5.0
 

I don't think that is the legal motor. I tried to look up the Cylinder Head number that is specified in the guide (BR3E-6049-C45H or BR3E-6050-C45H) and couldn't find it on Ford's site. The motor you posted is also listed as 11:1 while the 302 in the Engine Blueprint Specs is 12.5:1. I heard that it was difficult to get the heads for the 352 also, maybe call Holbrook? He build a lot of motors for Cobra Jets.

Re: Questions about Cobra Jet 5.0
 

Thanks.......I think it's just a paper motor and doesn't exsist even piecing it together. Valve lift 473/473 and I don't know what the valves mean.

Re: Questions about Cobra Jet 5.0
 

Probably not the one, Jimmy Ronzello had a D/SA 2012 cobra jet with the 5.0 coyote motor at Indy last week. NHRA specs are for the 5.0 motor that came in Mustang GT's starting in 2011, look at George Wright's site 9500rpm.com, there photos of this car being built

Re: Questions about Cobra Jet 5.0
 

Don't know if this is the exact engine but it is probably close.

http://www.fordracingparts.com/parts...KeyField=11829

Re: Questions about Cobra Jet 5.0
 

Thanks Jerry

Re: Questions about Cobra Jet 5.0
 

Jimmy Ronzello's Coyote motor at Indy.

Re: Questions about Cobra Jet 5.0
 

So I guess between Milan and Indy the throttle cable got taken off to pass tech?

Re: Questions about Cobra Jet 5.0
 

The engines in post #1 and #7 are not legal in Stock.

Ford never built any 5.0 Coyote engines for Stock Eliminator.....only part number paper combos.

Re: Questions about Cobra Jet 5.0
 

I've always wondered how these cooling systems can be deemed legal from a safety standpoint. That's the pressure cap on top of that degas bottle, and it will just puke out water around the edges of the cap if it needs to, there is no overflow whatsoever.

Re: Questions about Cobra Jet 5.0
 

Alan

Is the 302/325 that is listed in the 2012 Blueprint specs a Coyote motor or a Boss 302??(or are they the same??). We are thinking about building "something" and like the drunk in the liquor store, every thing looks so good, its hard to make a choice. seems the "paper" motors would be the cheapest and easiest, but the blown motors are so under rated that they sure look good on paper. I just need to win the lottery.

If anybody "knows" about the 302/325 I would sure appreciate any info.

Thanks RJ

Re: Questions about Cobra Jet 5.0
 

The engine in question is mostly a 2011 Mustang GT engine(Coyote), but it has 1MM more exhaust cam lift(a mistake in the specs maybe?) and the piston specs are rather vague, I can't tell if they are the same or not.

The Boss, AKA Roadrunner, has different heads, intake, and another 1MM more exhaust cam lift.

Re: Questions about Cobra Jet 5.0
 

It is kind of obvious by now that Ford submits specs that are different from production car stuff for a reason.
My guess is that they do that intentionally because they not want racers to use production car parts, but rather that they u$e their "Ford Racing" specialized part$.
Kind of a slick marketing move tho.

I still like the 2010 4.6L 3V CJ engine rated @ 232 hp.....what a ringer of an engine combo......LOL (CNC ported heads, large T.B., big cams, etc.) and "only" 232 hp ???

If I was going to build a naturally asperated CJ, that would be my choice.

Re: Questions about Cobra Jet 5.0
 

The 2012 Cobra Jet engine is very similar to the stock Mustang GT engine combination. The most notable difference is the pistons that add compression and the cams.

The intent of the Cobra Jet's with the 4.6L 3v and the 5.0L was to make it affordable for racers to build street cars into competitive NHRA Stockers. Even the 3v cylinder heads CNC ported are less money than getting a "valve job" on many vintage set of heads.

NHRA tech has told me that in general they will accept a replacement piston that is slightly less compression BUT that it must be submitted as an offical replacement piston. A racer or engine builder can submit a stock 5.0L or 3v piston, or an Aluminator piston as a replacement for the Cobra Jet piston and ask for it to be approved.

The 5.0L and 4.6L Cobra Jet models are a great bargain for building a Stocker, especially starting from a street car.

Re: Questions about Cobra Jet 5.0
 

What was the reason for making the changes to the pistons and cams? Why not just use the entire street motor if they are so similar?

Re: Questions about Cobra Jet 5.0
 

Andrew, I thought it would be obvious, to make things fairer for the rest of us.

Re: Questions about Cobra Jet 5.0
 

Is there a part number so I can buy the 5.0 Cobra Jet engine? How about the pistons? There must be some already approved piston available since there is a car out there running now, right?

How would I know what is a legal transmission? Normally this would be known based on what the cars were built with when new. Since none of these cars were actually built I have no way of knowing if two, three, four, five, six speeds are legal, auto or manual.

I have the car, I have 2 engines, it would be nice to know what I can do with them.

Re: Questions about Cobra Jet 5.0
 

Yeah, that's the ticket.

Re: Questions about Cobra Jet 5.0
 

I didn't know we could do that. WOW Can I send one of the Manley rods and have it approved also. Kdanner is right can I use the 6r80 trans as approved along with a beefed up 8.8 instead of the 9"?

Re: Questions about Cobra Jet 5.0
 

Of course, how could I miss that? It makes sense now.

Re: Questions about Cobra Jet 5.0
 

Not sure Jesse can answer this, might have to ask someone else, just look at the SNAFU on the on the Blueprints sheets at NHRA! 3 years three screw ups! This was years screw up

2010 Specs
500 hp SS/S ENGINE WITH WHIPPLE S/C IS LISTED AS A 2 INTAKE VALVES 1 EXHAUST VALVE. SHOULD HAVE BEEN AA 4 VALVE MOTOR.
This was last year till just befor INDY.
Ralph

Re: Questions about Cobra Jet 5.0
 

Jesse:
First, I would like to thank Ford for their support for the Stock Eliminator class.

Does Ford have any plans to submit to NHRA the specs for the 2011-2012 3.7 V6 Mustangs as well as the 5.0 Coyote GTs for Stock ?
From a marketing standpoint, I can see it helping to sell more new Mustangs. (both models)

Also, can someone at Ford Racing submit a factory 5.0 Coyote GT piston for approval to NHRA ? It would sure help the racers.

Re: Questions about Cobra Jet 5.0
 

I see no reason why you couldn't use the 8.8 rear.

I also think that since the 6 speed automatic trans is heavier than the C-4 or the CJ Powerglide....oopps, I mean the C-2, that there shouldn't be a problem using it....just my .02c