Reply With QuoteOK, the literature says its supposed to live but I don't see how if they are not changing the fuel or timing. They claim that they are not making any changes to the ecu. How long did the 454 and 502's live with a procharger?
The 496 doesn't use anymore siamese block.
OK, the literature says its supposed to live but I don't see how if they are not changing the fuel or timing. They claim that they are not making any changes to the ecu. How long did the 454 and 502's live with a procharger?
As I mentioned before, in a small boat where you can't go hard for a long time, those things work. Everytime I saw someone adding them to their motor in a big boat during a Pokerrun, head gaskets disappear and pistons melt. I don't get any benefit by insisting on those results, I just think it's very disappointing for a boat owner to see what happens with it's investment. But they are very nice unit when you have your motor professionally prepared for boost. And for those who think I'm trying to bring work in my shop, don't worry, I'm located in Eastern Canada, far away from most of you guys.
But if you do as Schiada96 said, I mean just a little boost, it should work. But most guys will rather use as much boost as they can with the system, and that's were problems show up. 3 pounds of boost will drasticly wake up your motor and will probably last good.
Thanks for your input Ponpon. They say the 496 system only makes about three pound of boost so it might be OK but from what you say and from what I have heard from others I will either repower with a motor built for boost or wait for a whipplecharger. At least they reprogram the ecu!
What I mentioned is not only for Procharger, it's for everything that puts boost in a motor. Of course all marine motor like to be blueprinted since they may be use hard and even WOT for long period of time. Better quality parts should also be used in all cases: heavy duty rods, forged steel crank, forged pistons as a minimum short block assembly. But attention should be put in straightening the block deck and head surface, combustion chambers should be reworked, valve job should be different, valves themselves should be different to be able to stand the extra demand, a better quality head gasket should be used. Ignition timing should be set accordingly to a blower application.
Unchained : reply to your earlier post about "blow thru superchargers being low performance & any more than 6# boost pushes fuel back so there is no fuel flow".....
I suggest you do a little research !! Procharger warns you & sells as part of their kit a Aeroquip fuel pump & boost referenced regulator that pushes the fuel pressure up pound for pound as boost rises.
As ponponracing said "3# of boost will wake up most motors".... I do not believe we were talking about a 12# boost full drag boat engine here, just a stock 496 !! looking for a little more RELIABLE hp. That's Procharger !
I run a Procharger on a HP454-450hp with 5# boost, Nickerson flow matched Holley 750 and run 75 mph on gps in a 25 Formula (heavy boat!)....never a problem with the blower, engine, belts etc. Excellent starting properties, & you don't need to "inject anything" into a "bird catcher" to get it started. You can keep your Littlefield, BDS, & Hampton blowers!
Formula 93, How many hours do you have on your setup? Sure would like to have more without the hassle of repowering! http://free.***boat.net/ubb/biggrin.gif:
Ok Formula, I stand corrected on the fuel pressure thing. What is the maximum boost that they can run with the blow through setup?
The maximum amount of boost thru any supercharger: positive displacement or centrifugal is dependent upon the size of the "pump". Procharger has, I believe, 3 sizes of chargers, the smallest being the M1. I think the maximum boost thru the M1 unit is 7-9#. The larger units can build more pressure as well as volume.
As fas as maintenance, I put about 60 hours on mine this summer, most of which is or was at 3500-4800 rpm, still no problems. The newest procharger units are also self contained, require NO external oil lines & are supposedly much quieter (the whine?).
My only complaint is not with Procharger, but the marine industry ! The only source for 120 degree thermostats I have found is Procharger itself. I don't really like a 140 degree 'stat in the Oklahoma heat. Good luck y'all with the 496 !!
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