750 Reliable HP

[SHOCKWAVE71]

Hi, everyone.

As a lot of people know I have been bringing Rio Roses to some poker run events. Trouble is I still have the 750 Supercats in her with the 12.5 compression, 1150 Demons that does not like to run for 45 minutes wot.Race fuel too.
Anthony Smith's been doing the motors and suggested Whipples and making the engine low compression and 540. Economy being as bad as it is, I was looking for alternatives to the Whipples (about $16K). How about Hilborn or Kinsler mechanical injection? I know it's old school but is priced reasonable.Do they make power? I want to keep it at 750 at least to make the boat run around 110 on pump gas. Any other thoughts? I really want to come out this year, but the business is getting crushed by what is happening out there.
Thanks,Rich

 

[KENNYO]

750 hp is not going to be cheap what ever you choose to do. Call Eddie Young. I know quite a few people that run his EFI engines. They are stout and very dependable.


You're welcome Ed!

 

[Geronimo36]

On The Chip ran their supercats WOT @ 7k rpm all the time and never broke anything in two years and Curtis is relentless on the sticks. Call up JCPERF!!

 

[Chris]

You're not going to get 750 out of that CID on pump gas without some sort of intercooled supercharging. Nor will you on a bump to 540. I picked up a pair of intercooled 8-71's last year for $6 grand and they're like new. There's 750+ on 540s with pump gas. Look around- you should be able to find something.

 

[BenPerfected]

Rich,
750+ HP NA on pump gas should be a relatively easy conversion using much of your current combination. After 6+ engine builders and 15 yrs I have it pretty well figured out. No matter what you do, you are likely looking at $15-20K a side to do it right...race gas might be the low cost choice unless your high compression engines need work. Call me if you want to discuss.
Sprague
214 632 0798

 

[Bertram38]

A supercharger gives such a huge variable in Hp upon differant fuels. Add timeing and race gas, smaller pulley and you just gained 150 HP. Who Friken Hoo.
B38

 

[Mrhorsepower1]

I have multiple pump gas engines out there @ 750-800 HP. Please feel free to contact me. I can lead you in the right direction the first time with a proven package. These engines are single 4 barrel. Thanks!

Dean Gellner
(216) 398-8500 shop

 

[RumRunner]

I'd talk to Dean or another reputable builder... Going to Injection isn't going to pick up any HP over a good carburetor.

 

[Mrhorsepower1]

I'd talk to Dean or another reputable builder... Going to Injection isn't going to pick up any HP over a good carburetor.

We have the technology.:biggrinjester:

 

[RumRunner]

Hey Deano nows the time to put that 500" deal together the fields will be light...

 

[SHOCKWAVE71]

Thanks everyone for your thoughts and pm's. I've got a lot of thinking to do.

Rich

 

[Mrhorsepower1]

I know I am working on it, but Money is tight every where!!!

 

[RumRunner]

I hear that... Luckily most of my guys still have some sponsorship to keep going.

 

[skaterdave]

750's

rich, my names dave k. i met you at smitty's shop afew days before the pt pleasent race. anthiny introduced us and you were thinking of leaving the boat at my place inbetween sarasota and kw.

anyway about the motor. i would talk it over with anthony agian and stay with NA motors. i'm making 750 hp with 8 to 1 comp and can run all day on 87. the supercat motors should be a 4.6 bore with a short stroke crank (3.8). i would dump the money back into the motors. new cranks at 4.25 stroke should give you 565 cubic inches. run a flat top piston and buy a new set of brodix cnc heads. and just switch the valve train over, replacing anything thats needs it. even if you add the whipples you would have to change all these components anyway. we just got done dyno-ing my motors and with a few changes to what i already had i'm well over 800 hp with over 750 ft/lb of torque. and all that on 93 pump gas!!

 

[glassdave]

well over 800 huh? . . . . gonna hafta re think our program :leaving:

 

[jeff1000man]

A lot of the performance shops have been selling brand new rotating assemblies for under 2K a set, Good heads are under 3K a side and new cams are under $400 a side. Using the blocks you have and all your accesories, you will be there. No reason you can't get there with 565CI, a good set of heads and cams, and the carbs and the rest of the stuff you all ready have.

 

[dwtinc]

Is everyone just bolting on the heads anymore or are they working on the ports.

 

[dwtinc]

Don't mean to sound stupid but what is a good set of head for his application for mine is about the same. I have merlin heads that have profesional extensive work on them but what would be better.

 

[jeff1000man]

Don't mean to sound stupid but what is a good set of head for his application for mine is about the same. I have merlin heads that have profesional extensive work on them but what would be better.

The CNC process from the maunufacturer or some of the bigger shops, IMO is taking the majic out of hand polishing and porting. The other benefit is that it is repeatable. Doing it the old fashioned way is still a work of art and can not be replaced, but at least with the CNC process, it is repeatable. Not all port work is created equal, even when it is done by the same guy.

 

[dwtinc]

The CNC process from the maunufacturer or some of the bigger shops, IMO is taking the majic out of hand polishing and porting. The other benefit is that it is repeatable. Doing it the old fashioned way is still a work of art and can not be replaced, but at least with the CNC process, it is repeatable. Not all port work is created equal, even when it is done by the same guy.

So what is the best heads in your opinion without going to another design? Or do you think it's worth the added money for the change.