"mods"
John, I think you took my post the wrong way. I myself have built high performance engines, mostly in street rods. My first was a 283cu.in. and up into the 327, 350 and small block 400's. I use to race my trucks at the local drag track and also had a nitrous boosted, air shifted 750-4 Honda motorcycle. Most of my V-8's were only equipped, after rebuilds (which included my own caustic boil out vat) with a Competition Cam with a 486 total duration so that I didn't have to go with a stall speed torque converter. I used a high volume oil pump, gas cooler, removed the fan for extra horsepower, cooling to the radiator with an electric fan that I rigged to a temperature control switch. I topped it with a 6" Weind or Edlebrock high rise intake, with a 2" spacer with a choice of running my Holly 650cfm with vacuum secondary's or my 850 double pumper (which I only used on the week-ends due to fuel guzzling). I dumped the standard 1.96 heads for the 2.02 for more exhaust flow and a set of headers. So you see, I'm no stranger to building/modifying engines, I've just learned, through experience, that the Rotax engine is already built for high performance, with dual carbs or fuel injection and an exhaust system that allows an increased exhaust gas flow rate, that changes according to the amount of fuel/air mix you send through it. The new engines (4-TEC supercharged, 255 hp) equipped with a computer controlled system, the EMS working with the ECM and MPEM, that moniters system functions and changes them according to sensor input, that trying to "mod" them is a waste of time and money.
Sure, there will always be some company out there to sell you anything you want, claiming to do "miracles" to your output. Thats true in any product you buy. I call it the "sucker" rule. If someome will buy it and theres a market for it, I'll make it and promise it can blow you away! How many times have you heard that line, only to be dis-appointed after you bought it? But truth is, by the time you invest enough money to gain that extra "noticeable" horsepower, you could have bought one with the same power you just paid out the "yang-yang for.
I bought a re-manafactured impeller for $30 bucks from SBT. I got a bud, who has a Honda, who paid over $200 bucks for that pretty Solas!....Guess what, he's really not blowing me away in a race.....
So, my point, yeah, there are mods out there that can give you a few extra ponies, but when you start making changes, you better make sure that ALL your systems are compatible with them, or you'll start getting errors in sensor pick-up or some other fault, if not an overheating problem.
If it's a must for you to do a mod, I'd suggest you visit the Riva performance site and look through there 1,2 and 3 stage kits. But it sure is a lot of money, for an extra pony.......
So if I mis-lead you by my first post, I apologize, that wasn't my intention. I look at cost verses return and I just can't seem to justify that expense without the thought of just buying a new ski with more power already there. :cheers:
Oh, BTW, expect engine life span to be dramatically reduced in "modding" out an engine, you say you race, I'm sure you already know that, but in my defense, in your first post, you made no mention that you wanted to build for "racing"........because that's a completly different set of circumstances. And in communicating in debate, you don't have to take a nasty tone. Just call them out!...ask them why the comment was made in that particular way. There may be a good reason behind it that you may have overlooked.....:leaving:
