Ilmor ?????
 

I posted in Q & A but no responce, so here it is

I notice that the 570 and 650 have V V T cam and all the rest don't , the 725 say's it has Billet Steel Solid Cam " why " ?
and what one is better for endurance ? " longevity " reliability "

Thank's
mike

172 views TTT

Mike,
All I can tell you is that my 2009 Gev IV viper V-10 8.4 lt, 512 Ci engine has VVT cam, and it's 600HP/560 Lbs of ft. torque, stock. I also know that some of the guys who track vipers change out the VVT for a solid cam...
Hope that helps.
Dean

Variable valve timing is great for streetability and emissions control, I dont see where it would add much in a marine motor apart from a better idle unless emissions are a factor.

VVTI will be the downfall of all manufactures reliable engine packages in the auto industry. I have been in it for over 20 years and VVTI systems fail all the time. I have 1st hand knowledge of Toyota, Lexus and Ford.

Short answer- marinize the viper engine to Ilmor specs, 650hp. Step 2, Build for more HP with more revs, 725
Both configs run very well and are 3-star emission certified.

Any experience with GM or Dodge? (Or Honda?) ;)

The honda variable valve timing and lift stuff has been really reliable. Now ford stuff???

Honda VVT has been around forever and is very reliable.

I would have to agree with that, the platforms themselves are pretty bullet proof these days and good for many many miles. Stands to reason marketing needs to have engineering get a higher failure rate back in somewhere . . . . .