Questions about Cobra Jet 5.0

[Andrew Hill]

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.

[201250]

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.

[JHeath]

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

[Bill Harris]

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

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

[201250]

Thanks Jerry

[CycloneFE]

Jimmy Ronzello's Coyote motor at Indy.

[201250]

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

[ALMACK]

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.

[Jesse Kershaw]

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.

[kdanner]

Originally Posted by CycloneFE

Jimmy Ronzello's Coyote motor at Indy.

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.