okay gang---here goes. I am assuming that Whipples are the best from what I hear. Which is the best version to go with when it comes to a Whipple?---carbed or fuel injection?

How much torque and horsepower can I expect to gain from a Whipple Charged stock Merc 454" MPI engine with stock heads and with aluminum heads?

How much torque/hp from a stock Merc 502" MPI (415hp) engine w/whipples with stock heads and with aluminum heads?

How much torque/hp from a stock Merc 502" 500hp EFI w/Whipples---stock heads and then with aluminum heads.

I want the least amount of maintenance, turn-key operation, SUPER DUPER smooth idling (ASOLUTELY NO SURGE). I only want enough cubic inches to make 700hp @5500 WOT and about 700ft lbs of torque---no more. What cubes can it be done with and what Whipple charger should be utilized? It must be a bolt on situation, however I am willing to modify to aluminum heads if it will make it more reliable and decrease my chances of having troubles. What kind of boost and what kind of fuel? Thanks in advance.

Mark/KAAMA

Try going to the Whipple web site. I believe they HP figures for the 3 engine combinations you requested.

Rick

What are you up to I was always under the impression from reading your posts that you were turn key with the setup you have

KAAMA, What kind of project are you looking at? Alot of money for one of these engines if you don't allready have one. I have a 502MPI and am very happy with it, all though if I was shopping I would go to the 500EFI. Idles like it did when stock.
Here are the numbers off Whipples web site, I hope Dustin don't mind. It looks like you will need the 500EFI to get the HP you are looking for. You need to talk to Dustin about the heads for the 502MPI. I did and if I remember right he indicated that there was a lot more involved; like fuel rail and injectors &, &, & not to mention, trying to program the computers. Definitely not turn key!
If you do the install, it is not really turn key either. It takes alot of testing and checking, and if the fuel mixture is wrong then you have to send the ECU's back, to have dustin change them.
Don't forget about the HD Outdrive either.

1999 - 2001 Mercury Hi-Performance 500 HP EFI
Horsepower Peak 490 @ 5400 742 @ 5500 252 51%
Torque Peak 554 @ 4200 824 @ 3400 270 49%
Torque Average 2200 - 5000 RPM 503 Ft./Lbs. 792 Ft./Lbs. 289 57%

1993 - 2001 MerCruiser Magnum 502 MPI
Horsepower Peak 415 @ 5000 640 @ 5300 225 54%
Torque Peak 499 @ 3800 748 @ 2800 249 50%
Torque Average 2200 - 5000 RPM 453 Ft./Lbs. 711 Ft./Lbs. 258 57%

Anyone know what the Whipple website address is please? I tried last night without any gain. Thanks

Mark/KAAMA

KAAMA

If memory serves me correctly it is whipplesuperchargers.com.

Be safe.
Mark

BTW, I am being very sincere here. I know---- I am usually a Naturally Aspirated kind of guy, but I thought it would be cool if I could make 700hp and torque out of a stock bottom end 454 MPI with maybe some CNC's aluminum heads. I heard that with super chargers these days that you can get them to even idle better than naturally aspirated engines and yet they SCREAM when you want the power. I love a SUPER SMOOTH idle----I hate a rough idle. The smoother the idle the better I like it, but I don't want the SURGE effect. Smoother idles are less annoying to me, my crew, bystanders, and of course the ever faithful, more than happy marine patrol.

Hey, KAAMA,
If you want to make 700hp and 700lb-ft at 5500, you can use a Whipple at about 6psi and displacement of 427 or more very reliably. It can be done with a smaller engine but reliability will suffer. The two things that you must do-the cam selection is critical-call Robert for info-and the cylinder heads must be right. Dart Pro-1's are good, but they will not run with AFR. I would recommend 315's here. These will bust Pro-1s on a supercharged application. Good luck, call if you need us!!

Well then perhaps it would have to be a 502" engine---like maybe the Merc 415hpMPI (390hp @ the prop) with aftermarket manifolds or even headers and CNC'd aluminum heads? But it MUST be a TURN KEY/RELIABLE operation!

I am working up some engines with Tyler Crockett, 540 (gen6 block) 8.3 +- compression new whipple 3.3l with large roots style intercooler. Aluminum heads. This setup is EFI But apparently all the injectors are in the thottle body, so it kind of works like a carb. This will run low boost 2-3 psi max These will also run on 89 octane gas. (requirement) Should Idle like a stocker and we are expecting 750 - 800 Hp each. I am about 1 month away from completion of the 1st one and I will have dyno info I will post when done. Meanwhile I have a picture of a similar setup but in a V-drive boat.

Picture compliments of Dustin

P.S. in order to get 700 Hp out of a stock 502 you would have to run 5Psi or above and use premimum fuel. I am getting new rotating assy's in order to get the 540 cubes