Dumb Question...?

jtssrx said:
You know there is only one reason why MC went to a rear mount turbo RX FUN. They made make money on it!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

I do not aggree, however, as RX Fun was getting to this is going in a bad direction in a hurry. Jason, I'm sure your turbo is the best and soon every other design will be obsolete. I hope that when that happens and I call to order mine you will give me a good price.
 
jtssrx said:
So stop with he longevity b-u-l-l-s-h-i-t. Fuel is the key to longevity.

WOW!!...if you are selling these kits, you might want to re-think your sales-pitch!

Might is suggest Dale Carnegie? :D :D
 
RXWonder: I had a few tasty replys but desided to not go amsnow on this board.

the point is until either spray25 or RXfun have real knowledge of the kit so they should keep there "opinions" of it to themselves.

The Fact is there is no best kit. It's what ever you like and what your comfortable with. CPR,MC,Bender Powder light,BPE and LP all build great stuff for the RX-1. I hope all of the companies continue to keep Yamaha ahaid of the rest.

Good luck with the rest of the season!!!!!!
 
spray25 said:
People are not always going to share your opinion. That does not mean they are attacking you or your products.

If I bashed your kit in this thread please quote it here. I don't remenber doing so.

I'm sorry that you feel I shouldn't share my opinion on turbos in the mountains. Unfortunately for you, I do have an opinion and as long as I am descent in expressing it I am allowed to do so on this forum. You have certainly been known to share your opinion, but when it does not conform to yours you get mad and the thread turns ugly. It's unfortunate that you react that way, but hey it's a free country that is your choice.
 
Well guys, seeing as though I started this thread, I still do not feel I have my answer......so.......IF I turbo my sled.(Lightning Pro, Bender, MC Express whatever)...Do I have to run high octane fuel or do some kits allow me to run REGULAR (87 Octane).

With the 87 Octane running in my sled what HP would I expect to achieve?
 
Wonder,

You might be able to get away with it, but I don't think any of the manufacturers recomend it. MC includes a thicker head gasket in their kit. That might give you low enough compression to run a low boost level with 87 octane. Maybe 5 lbs or something. Give them a call and ask.

You could put in a boost switch for 5 lbs and 10 lbs so that if the gas was questionable you could simply reduce the boost.

Edit: I don't think I made it clear that I would not run 87 octane as I don't think it is worth the risk.
 
RxWonder - I appreciate where you're coming from with respect to not always being able to buy premium fuel when out on the trail. I sometimes run into the same problem on overnight trips in my area. The short answer to your question is yes, you can run your sled with a turbo and 87-89 octane fuel, but you need to be 'smart' about it. To repeat the good advice that Spray25 and Powerhaulic have given you, I would reccomend installing some form of boost controller if you put a turbo on your sled so that you have the ability to quickly/easily dial down your boost pressure when the situation requires it. setting up your wastegate and installing a controller to accomodate your requirements is not difficult to do, and can be done with any of the kits previously mentioned in this thread. The compression ratio on the RX motor is on the high side for a turbo, so you should always be running the best gas, coolest intake temps possible. A thicker head gasket is not really a difficult install, and I would reccomend spending the time (or the $) to have it done on your sled.

As for power? A little under 10hp per pound of boost is a good guesstimate.

PM me with a # to call you at if you want to discuss this in more detail, I can give you more info that I'd rather not share in a public forum...
 
Thanks guys...I also spoke to Bender and they suggested the same toggle switch scenario for their Stage 2...(toggle between 4 & 8 Lbs of boost.)

No descision will be made until the end of the season but I will be spending considerable time doing R&D on this subject in the months to come.

Thanks again everyone,

RXWonder
 
jtssrx said:
the point is until either spray25 or RXfun have real knowledge of the kit so they should keep there "opinions" of it to themselves.

I'm not a turbo expert like you are, but I'd like to know if you have run one of your set-ups up a 2 mile long, 40 degree incline in powder that you can't even think about walking through.
I do know a little about doing this...... and unless you've gone side by side with a rear-mount, I wouldn't be so quick to slam these two guys.
 
If premium fuel supply is questionable, I would not even think about putting the turbo on. I think running 87 octane with a turbo will result in posting on the "engine failures" thread. It's one thing to have to nurse it back at low throttle because you had the misfortune of being stranded and the only fuel available was 87, but to know that you will have to run 87 on a fairly regular basis, and running boost, is just asking for problems. :o|
 
From what I've read, a boost switch would solve the low octane problem. You would think someone would make one with a low enough setting to get around any fuel problems (like 2 psi.)
 
JDKRXW: Did you read the whole tread? I'm not ripping them. I'm not ripping rear mount kits. I'm pointing out inaccuracys in there statements about our kit

To answer your question about mountain testing. We have a mountain tester

Oh ya a low boost switch inst the answer to low octain. Not running a turbo is the answer. If you can't get premium fuel you shouldn't run a turbo. Just my opinion.
 
jtssrx
no boost = no turbo = low octane should be OK?? (especially if you've added the thicker head gasket or LC pistons)
The reason people are curious about this is that on the trail (or in the middle of nowhere, which is where I often ride) getting gas is not too much of a problem, but getting good premium is.
 


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