Thread: Les Cooke or Riva
11-29-2009, 01:17 PM #1
Les Cooke or Riva
What would you do.
I want to add an ECU havent decided which is best but I wont be going any higher than 8650 limiter and prob 8500-50 prop speed.
My engine currently has 115 hours and is running sweet but I wont be upping the RPM without new valve springs.
Here are my 2 options,
1: Get a full set of new springs, Les Cooke retainers and a set of new rocker bolts for $520.00
2:Get the Riva valvetrain kit for $540.00 with hulk discount.
Which is better considering what RPM im shoting for and my ski is REC but gets bashed round CC courses from time to time. The $20 difference is not really a consideration so just want opinions on what is the better setup.
Im thinking that the Les setup costs less power than the Riva but that is prob very marginal.
Thanks for your thoughts.
11-29-2009, 01:21 PM #2
Either way you go you cannot loose..They are both Great proven setups..
11-29-2009, 02:22 PM #3
We install the Riva Valve train kit from Jerry for all increased RPM applications and have had 100% reliability. With that kit and a block gaurd you are covered for the two main evils of the 1503 engine.
11-29-2009, 03:57 PM #4
- Join Date
- Jul 2007
- PDX - Oregon
11-29-2009, 04:08 PM #5
Im thinking the Riva ECU is prob the best as well, although it is more than a Re-Map but I think that it will give a better base for further mods than a Re-Map that has been tailored to the current mods I have.
Is the concensus that the Riva is prob the safest as far as reliability is concerned???
Thanks for your opinions so far. R88
11-29-2009, 07:11 PM #6
- Join Date
- May 2005
- Cumming, GA
Since you already stated you are buying new springs as well I would go with the Riva complete valvetrain kit. If you were staying close to stock class (doesn't look like you are based on your info) racing or re-using your OEM springs I would go with the Les Cooke retainer set.
As far as the ECU goes since you do more rec riding and want the limit below 8650 rpm I would go Riva and the injectors to match. Looks like you already have rrfpr to dial it in for more boost than the Riva ECU is set up for. If you were leaning toward more racing or more rpm I would go with the Les Cooke ECU and have him program a map to meet your needs.
Just my .02
11-29-2009, 10:12 PM #7
Les Cooke retainers apply correct amount of seat pressure to assure little fatigue on valve guides. engine will rev faster with les's over Riva's i noticed.
i have seen valve guides worn bad from Riva's
my two cents
11-29-2009, 10:18 PM #8
11-30-2009, 05:03 AM #9
11-30-2009, 05:11 AM #10
Oh and no Im wel past stock rules for racing in the UK. Our race regs dont allow any engine mods or ECU in stock class. You can fit retainers and swap your ECU to run in LTD basicaly they have allowed retainers in Stock class so that people can be more competative in LTD on the same boat with diff ECU.
Alot of the racers over here run in both stock and LTD with same boat but diff ECU for each class. R88
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