Poking the Bear Ford Performance Products

[Hacksaw]

Originally Posted by HR9121

Just out of curiosity because I haven't looked at the Showdown rules, but what would it have hurt to leave this combo in guide? Can there only be one combo in the guide for the Showdown class?

Ya: I don't get this either. Why would anyone contact NHRA and have them remove combos from the guide?

[HR9121]

Originally Posted by Jim D'Amore

No each manufacturer has several combinations. I believe Ford has 6, GM has 6 and I think Mopar has 2. There are no rules on engine combination right now. They are saying for 2019 whatever motors we have been running in the past couple years will be frozen. By that I mean they will not be adding any more new combinations. This is what I've heard, it's only hear say. That's why it's of the utmost importance for me to get this Stock Eliminator legal combination approved for showdown.


Jim D'Amore

As they say there's always two sides to every story but I do find it odd that you go through the trouble toget something approved then have them remove it.

[GUMP]

Originally Posted by HR9121

As they say there's always two sides to every story but I do find it odd that you go through the trouble toget something approved then have them remove it.

My understanding is that all parties agreed to limiting the blower size. The 4.0L blower is still in the guide for S/SS. It just isn't legal for the Showdown. The Showdown rules have changed several times since the birth of the class.

[troublemaker427]

Originally Posted by GUMP

My understanding is that all parties agreed to limiting the blower size. The 4.0L blower is still in the guide for S/SS. It just isn't legal for the Showdown. The Showdown rules have changed several times since the birth of the class.

Just curious as a fan of the FSS class how have the rules changed?

[HR9121]

Originally Posted by GUMP

My understanding is that all parties agreed to limiting the blower size. The 4.0L blower is still in the guide for S/SS. It just isn't legal for the Showdown. The Showdown rules have changed several times since the birth of the class.

Gotcha, I understand now.

[GUMP]

Originally Posted by troublemaker427

Just curious as a fan of the FSS class how have the rules changed?

Newer motors in older cars for one....

[Jim D'Amore]

Originally Posted by GUMP

My understanding is that all parties agreed to limiting the blower size. The 4.0L blower is still in the guide for S/SS. It just isn't legal for the Showdown. The Showdown rules have changed several times since the birth of the class.

Gump,


The 4.0L is legal for Showdown according to NHRA, they actually approved the 4.0L combination. As long as Ford is willing to put it into the showdown guide. As for a common supercharger I even told Mike D. lets take the 4.0L off and exchange it for a 2.9L. His answer was still no.


Lets get to the facts here...the 4.0L supercharger with the 4.00" pulley on it will spin 6,000 RPM slower at 8,500 engine RPM. The 4.0L supercharger is also a rear entry requiring 2 90* turns before the air hits the impellers. The 4.0L takes 32 more HP to turn it than a 2.9L. It only produces on the 5.4L engine right around 20-21 psi boost. Compared to the 2.9L's that make 26-28 psi. Due to its new Gen 3 rotor design and the front entry feed. Here is the big fact Gentlemen. The 5.4L set to NHRA's max allowed bore, compared to GM and Mopar's max allowed bore we are 30 cubic inches less than COPO and 34 cubic inches less than MOPAR. So even if we had the same amount of boost the with the 4.0L we would still be at a disadvantage with the 5.4L because of cubic inch. We would still be bringing a knife to a gun fight but it's still better than what we currently have in the 08,10, and 12 CJ's.


Jim D'Amore

[kdanner]

Doesn't appear to be unique to Ford that some older combos are not legal. It's been touched on that the 327/4.0 isn't legal, but the 327/2.9 isn't listed as legal either.

[Chris1529]

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[James Perrone]

Originally Posted by Jim D'Amore

Gump,


The 4.0L is legal for Showdown according to NHRA, they actually approved the 4.0L combination. As long as Ford is willing to put it into the showdown guide. As for a common supercharger I even told Mike D. lets take the 4.0L off and exchange it for a 2.9L. His answer was still no.


Lets get to the facts here...the 4.0L supercharger with the 4.00" pulley on it will spin 6,000 RPM slower at 8,500 engine RPM. The 4.0L supercharger is also a rear entry requiring 2 90* turns before the air hits the impellers. The 4.0L takes 32 more HP to turn it than a 2.9L. It only produces on the 5.4L engine right around 20-21 psi boost. Compared to the 2.9L's that make 26-28 psi. Due to its new Gen 3 rotor design and the front entry feed. Here is the big fact Gentlemen. The 5.4L set to NHRA's max allowed bore, compared to GM and Mopar's max allowed bore we are 30 cubic inches less than COPO and 34 cubic inches less than MOPAR. So even if we had the same amount of boost the with the 4.0L we would still be at a disadvantage with the 5.4L because of cubic inch. We would still be bringing a knife to a gun fight but it's still better than what we currently have in the 08,10, and 12 CJ's.


Jim D'Amore

But you have multiple cam shafts and 3 valves per cylinder
And you want a bigger piston? This ain’t nascar. All 3 manufacturers do it differently
Sounds like you need to get another combo. Seems like Watson goes fast and is competitive