http://compmillennia.com/index.php/lightspeed/ Building composite fishing and pleasure catamarans.
Well Ive been reading this post and figured I would put my 2 cents in!!! I have the Skater with the very first Viper power from Ilmor. It has Mercury racing 6's with Huber 1200 tranmissions. I purchased the boat with a hurt engine, it spun and trashed 2 rod bearings, this was all that was wrong with it. I started the motor when I first purchased it and it was just knocking slightly. The boat had approximately 200 hrs on it total. I pulled the engine out of the boat and put a crank in it and 2 piston assemblies myself. These motors are very simple to work on and are pretty trick straight from Mopar. I talked with Eon Hawkins and the guys from Ilmor a lot when I was just fixing this motor. I did not rebuild it or freshen it. The other engine was in tip top shape. I ran the boat for 200 more hrs. After season 2008 I decided to upgrade the motors for more power. I talked to Ilmor and a couple other viper places. I had talked to Proline before when I first purchased the boat about doing the motors right off the bat, but I didnt want to spend the cash. I had made my mind up about having Proline do the motors. Both motors were running flawlessly when I pulled them out. Thats with over 400+ hrs!!! And that is beating the crap out of them. Proline went through the motors very thoroughly. We left the bottom ends alone, obviously we put all new bearings and file fit rings, balanced rotating assemblies, and so on. The heads were sent off to be ported and polished along with the intake. We had custom cams ground to Proline Specs. We replaced all the valves, guides, locks, retainers, etc with bad ass stuff. I didnt want a problem with the valve train for future blown applications, Ill get to that in the end. The motors came together flawlessly. We encountered a couple hick-ups but nothing major. Proline said the motors looked excellent when I brought them. I thrashed putting the motors back in the boat to make our Poker Run. I had Eric from Injected Engineering come to my place and tune the motors on the lake with Wide-band sensors and data-logging. I tuned the motors thru the factory computers with SCT Tuners. The programming is great and simple. We had the boat performing excellent in about 5hrs. I still have some tuning to do to squeeze a little more out of them. I left it a little rich because I like to hold it wide open for hrs!! I have put about 60 more hrs on it since the motor rebuild with Proline and havent had an issue yet. They run super strong and sound way different than the original 550's!! Its been 132 with a borrowed set of Herrings and good conditions, air temp 82, water 8" chop, in to the wind. I have found that the boat is 5-6 mph faster in to the wind than running with it. But that is what Cats like. I have talked a lot with Peter and Chris with Skater about set-up, I hope to make the boat run in the 140's with the power like it is now. That will be with perfect conditions!! I am very happy with the Viper power plant and Ilmor. The guys at Ilmor are awesome and very helpful. I have had hr long conversations with them and they didnt mind at all. Now my new itch is to put some kind of power adder. I cannot run the Paxton blower because the firewall is too close to the front of the engine, the paxton is a reverse rotation blower and the body sits toward the front because of the car application. I was looking for some prochargers to use and do all of the plumbing, and mounting myself. I would rather run a 5 liter Whipple!! I am trying to get this started but, I dont have the funds right now to spend on a bunch of R&D. I took the boat to Skater last year also and had a bunch of stuff done. So any extra hush money for the boat was spent last season on boat and motors!!! lol I would like and am still trying to have the fasted Viper powered Boat period. I am shooting for 160mph. Thats obviously with a blown application. I would like to know how fast other cats with vipers have been.
Interesting re-build story; thanks for sharing. Do you have any idea how much power your engines are making now? Based on your speeds, it sounds like upper 600's?
The fastest Ilmor boat that I know of is the 28' Eliminator with 725/Indy packages: 156 mph.
You will always be at a disadvantage with the Huber/#6 packages, as they consume more power that Ilmor's setup. Ilmor offers the Indy drive/transmission to Ilmor-powered boats as a retrofit. You might be able to sell your stuff for enough $$ to pay for the upgrade.
Retired! Boating full-time now.
Thanks for sharing! How much HP do your Proline modified engines make, I didn't see that posted anywhere?
+1 on Ian & the entire gang at Ilmor. Nothing short of 1st class!
My Skater 30 w/ Ilmor Gen3 710's (700hp) ran 137mph w/ the previous owner, I've seen 135, w/ slightly smaller Hering 5 blades than the original owner ran.
You can ask IlmorDude but I'm pretty sure it's going to take 160mph to be the fastest Ilmor Cat b/c Eliminator built a 28 w/ twin 725's & Indy drives that I heard was in the 150's pretty easily first time or two out!
Nevertheless what you've done to date is impressive as it is.
We saw the Illmor plant on some Boat show last night that the wife had Tivo'd. Looked 1st class all the way! Right down the the blue shirts. GOOD work guys. O and the SOUND of the V 10s O yea.
I didn't get the station it aired on either. $150/mo internet/cable bill & still don't have all the channels, WTF??
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