91 Excel, reverse rotation engine?

My 93 is PRP-WR and the firing order is exactly opposite, so same crank spinning the other direction. The V drive is what changed.

There's really no reason why a GT40 couldn't run backwards if you switched the cam and the distributor gear. That computer isn't smart enough to need to know the difference.

Okay, here is a picture of the engine plate from my boat. Looks like a reverse direction engine looking at the firing order.

Air206 wrote: Does this help - 1991 BFN..... Look at the engine tag. It provides rotation indication.

Interesting according to the plates both engines are Right hand rotation but have opposite firing orders.

1StopJeff wrote: Air206 wrote: Does this help - 1991 BFN..... Look at the engine tag. It provides rotation indication. Interesting according to the plates both engines are Right hand rotation but have opposite firing orders.

Ah, one is a Ford and one is Chevy and the cylinder numbering is different.

Now Benj, the R does not indicate Reverse but Right-hand from the back... of the motor? Which would be the same as Reverse?

Eureka! So any recommendations on cam and intake to go along with the GT40p heads?

Ok, Don & Jeff:

Try not to envy my "K"..... Ha!

Personally I think it is safe to say that no H.O. Fords, gt40 or not were reverse rotation and that no sbf pcm engines ever had a roller cam, although later ones 95ish+ could have had the cast bosses and holes (although not drilled or tapped) for the spider gears. The lightning got them in 94, 94/95s with standard power could have been leftovers, but by the time you got to gt40s they were likely using the new blocks everywhere. With the 302s they made two seperate blocks for 5 years until they consolidated, with the 351ws they probably just changed all the mold tooling up front.    

Anyway I figure the original poster needs to go to cam research for a cam, and pick up a weiand stealth or performer rpm manifold… and if they are feeling froggy some 1.7:1 roller rockers … anyone else with a suggestion or two ?

Steve, why would I want one of those?

There are right handed Pro Boss motors, I have one.   The marine motors have a bigger cam and more power than the Lightning so they probably figured no need to step up to a new roller cam on a motor that was coming to an end.   

yep I think it was Randy's engine that proved me wrong last time I said that.

That is not right. What is your maximum RPM and MPH? Also, what prop do you have on there?

If you don't have an Acme 328 then get that done first. I don't get out of the hole considerably quicker with the CHI upgrade, it did cut quite a few seconds from 12 to 40 and I have to be quick to not blow past my usual speed of 24 once it's on plane.    The 328 got us to where we use 1/2 throttle instead of full throttle to launch, the CHI wasn't needed, but I was changing the heads so I figured I might as well try to see if I could push it past 50 just for grins.

If you haven't spent a lot of time behind a big wake boat the stock Excel seems sluggish because you think it should move like a DD and it won't. It does move quicker than most every wake boat.   

I had a '87 Chris Craft 21 foot Ski Jack. It was a big boat. It only have a 260hp 350 Chevy, granted it was in the middle with a jack shaft to a stern drive, but the boat was a deep V and weighed close to 2000lbs more than the Excel. I had a 5-blade stainless prop on that and it pulled out of the hole great. I figured I should at least get as good of out of the hole performance as the CC. I will definitely get the prop. So what is your top speed and rpms now with the prop and CHI?