Whipple 496 HO
 

I have just purchased a scarab 29 less engine and drive,I am about to install a 496ho and i think it would be to little horsepower in the stock eng. So therefore i am planning to install a whipplesupercharger!! anyone with experience of thoose "kits" ? problems ?? Alfons Stockholm Sweden

check http://www.raylarengine.com/

wipple anyone ?
 

They look fine but iam realy into supercharging it ! Is there someone out there that drives along with a wipple/496ho ??

Take a look on ebay. There is a used kit for sale.

A buddy just had the entire front snout with pulley, break off and drop in the bilge. This was on a 496ho with whipple running 5#( I think). Superchargers and cast cranks do not play well together. BTW this was on the boat for only 2 years, very few hours, and perfect servicing. Not pretty.


Darrell.

What a nightmare

We have Installed several 496 Whipple kits and they are great. If you do the math you cant beat it Because all the other up grades kits require headers and they are big bucks. If you need more info on the Whipple kit feel free to call @281-326-7800. We wont be back in the shop till monday as we have huricane Ike comming toward us.

I have a pair of 525EFI Whipple-Charged Engines that Dynoed at 768 HP and 725 ft-lbs at 5800 rpm. After rebuilding the engines, going to 509 ci with Flat Top Pistons and making them true Blower engines the package works great. I run lower HP for longevity and realiability, but they can be easily cranked up to 900 HP.

The trick is in having the proper software to check all the vital signs when tuning. I would strongly recommend the WHipple Package.

[QUOTE=clpbs;2683267]We have Installed several 496 Whipple kits and they are great. If you do the math you cant beat it Because all the other up grades kits require headers and they are big bucks. If you need more info on the Whipple kit feel free to call @281-326-7800. We wont be back in the shop till monday as we have huricane Ike comming toward us.[/Q Just the words i am looking for:D I will get back to you reegarding the whipple kits . I hope Ike have a broken GPS

True. It's not pretty at all. The 496 cranks have a hole drilled into them, and a pin installed to stop the balancer from being installed on the crank too far. It's about 3 inches from the end of the crank. This is the exact spot where the crank broke in half. It split right in the center of the hole. Time for complete rebuild, this time with all forged parts. Like I said, cast parts and blowers don't mix.



Darrell.

A buddy of mine ordered a Whipple kit on his brand new 496 in a new 26 Outlaw. The motor ran the first season running way too rich, producing more soot than performance. A recalled ECU improved matters. The right settup, is what the dealer said.

At 90 hours the motor lost power big time. A massive hole burnt through between two adjacent cylinders. Head, block and piston damage. End of 496.
He´s now running a 600SCi/ITS Sportmaster .....and making a table for his office out of the 496.

Darrells right, 496 is a fine motor in stock form. Best kept that way, or build a complete new motor.

Alfons ,

You have some very good advice in these posts ,Raylar in standard 496 ,Or go up to a bigger motor with the internals to handle a blower .

Do The Raylar With All The Good Part's I Think The 600hp Kit Include's Everything . Then Add The Whipple :)

one step further
 

Did he run an entire season with to rich mixture ?? No wonder the engine went fishing. ABC right amount of fuel/air are realy important , I wouldnt dream of puttin any load on the engine without havin ch
ecked the mixture. Widebandsensor and check the lambda readings so that i know the mixture is right !

I installed the kit on my 496 a few years ago. Everything went together real well. I was impressed with the quality parts and the thorough instructions as well as the support I got from whipple. I've got 50 hours on this now and virtually no problems. The computer program had a "hot start" issue. I shipped the computer back to Dustin and they reprogramed it with the fix and then made a custom callibration for the altitude I boat at and shipped it back without charge. Can't complain about that! I don't get our very often and my primary purpose was to make up for the altitude on the lakes here in Colorado and this met my goals.

Did he run an entire season with to rich mixture ?? No wonder the engine went fishing. ABC right amount of fuel/air are realy important , I wouldnt dream of puttin any load on the engine without havin ch
ecked the mixture. Widebandsensor and check the lambda readings so that i know the mixture is right ![/QUOTE]

The dealer, who did the whole installation, running it in the boat with lambda readouts, and had said to him that the settup was on the defensive side with a 14:1 Air/fuel ratio, If I remember right. somewhere in the rpm curve it was clearly running way rich.

The motor died of a hot spot which indicated too lean a mixture, and that occured some five hours after the ECU recall.

Like Raylar, I believe that Whipple does a fine job and makes good equipment, but if something on the installation is a little off the specs, even they cannot help there.

However putting a blower on a motor that GM builds for Mercury cost effectively to deliver 425 reliable horsepower and draw 600 horses out of those same components.....is going to have its price. Or does Merc overspec their stock motors for the benefit of the aftermarket guys. Very generous!