Dyno results hot off the presses!

[MAXIMAN]

Hmmmm...interesting.

I have also heard that a significant volume of Methyl Alcohol (methanol) will oxygenate the fuel giving a similar results. But the ratio is something like 10 or 15% methanol to pump fuel.

Ever heard this?

[Dan Hodges]

Originally posted by MAXIMAN
Hmmmm...interesting.

I have also heard that a significant volume of Methyl Alcohol (methanol) will oxygenate the fuel giving a similar results. But the ratio is something like 10 or 15% methanol to pump fuel.

Ever heard this?

Without going into the BTU value and air fuel ratio of Gas vs Alcohol,it is generally accepted that a pure alcohol burning motor will make between 10%-15% more power than a pure gas motor and a lot more low end torque.You have to use a carburetor designed for alcohol or fuel injection because the fuel to air ratio on an alky motor is roughly double that of a gas motor.Holly and Barry Grant both have off the shelf carburetors that work well with pure alky.You also have to have a fuel pump designed for alcohol, as in addition to the required increased volumn,alcohol is very acidic and corrosive and it possess no lubricating qualities unlike gasoline.The big advantage to alcohol is you can use more compression than you can with gas before detonation and the motor runs a lot cooler,of course there are physical limitations with each engine combination on how much static compression you can make.The bottom line and the answer to your question is that using a 10% by volumn mix of methanol with gas will not provide a significant increase in horsepower. Propylene Oxide is a different animal and will make about 15% more power in a gas motor if jetted properly.And finally, when it comes to engine fuel I have heard of most everything and have tried a lot of them,some good ,some not so good.Alcohol is the darling of bracket racers.

[MAXIMAN]

Originally posted by Dan Hodges
Alcohol is the darling of bracket racers.

Ah HA!!! So that's why those damned drag racers are always stumbling around in the pits!

[Dan Hodges]

Originally posted by MAXIMAN


Ah HA!!! So that's why those damned drag racers are always stumbling around in the pits!

I was wondering if someone would pick up on that one and you did,uhm, interesting.

[sleazybear]

When you think about it, your working with a 20 year old bike, that was at the time the hottest thing on 2 wheels, today it is so passed over, you can tell this just by the resale price. Everyone these days wants to sit with there head stuck behind a winshield bent over eating handle bars. Just that part is a big disadvantage, the bike is a cruiser sport bike, As an xs11 owner for 22 years I am proud to see those numbers. The only thing you may look at is getting cam2 gas, or running an alc mixture. There is a little trick I used back instead of winshield washer fluid in my winshield washer bottle old glass one, I had it hooked to a line that went into the carb with a real small jet connected to the hose, what was in the winshield washer bottle? alc when I wanted an alc mixture i just hit the winshield washer button.. poor man nitrous at the time. oh this was on my car not on a bike, but i guess it could be done with a bike.. just use it sparingly dont want to burn a hole in the top of a piston..

[pggg]

Max, just to compare, 80SG cams are .344 lift, and duration @050 is 229 deg. The big increase in lift and duration should be a buzz. Might be a bit fluffy below about 4000 revs, those stage 1 cams would be really good on the street. Valvetrain mods as in springs and different shim/bucket setup and possibly shortening the valve stems, but the valve spring kit is probably a similar modification.

[MAXIMAN]

The guy that is rebuilding my engine is the local Kawasaki dealer.

His passion in life is racing Legend cars. Of course these machines employ the venerable FJ1200 heart. The guy has rebuilt and modified literally hundreds of these engines not only for himself but for many others.

Though they are different the XS and FJ engines are similar in many respects.

Anyway...the port job on the head was pretty conservative and designed for lower and mid range. He opened up the intake and didn't do much to the exhaust side except clean it up. We are employing only the intake cam of the stage two Web and keeping the stock exhaust. Of course he'll be able to tweek the tuning with the slotted cam sprockets.

I've no real experience with this stuff....that's why I hired a pro. I simply told him I wanted more power and torque across the board and whatever happened I needed low end grunt and mid range punch....because this is a big heavy road bike. We had two or three 1/2 hour meetings in his office where we talked about it and came up with a plan. I just told him what I wanted. He pretty much decided the technicalities what to do to the Maxim. We worked out a budget and started gathering up parts. We may even try a set of FJ carbs just to experiment.

Hopefully the entire community here at channel 11 (as Dan so aptly calls it) will learn something from this project. I'll try to post photos of the head work later.

This Motad header is very very nice. "I am impressed" is an understatement. Triple chrome plated and slicker than a baby's behind. It's a true Tri-Y design 4 into 2 into 1. The pipes are routed around the oil filter allowing unfettered access even with an oil cooler plate. The central collector is routed the "H" of the center stand and then to the right side of the bike.

Hoepfully this project will be complete by next week.

[GNEPIG]

.. hey Cody, would you post photos of your new exhaust before you put it on your bike? the sites that i've seen them on dont have good pics of our specific model.

[MAXIMAN]

Check out the exhaust port flanges in the hardware bag. They look like the OEM. Very heavy...unlike some of the cheesy looking crap on the current crop of headers.

[MAXIMAN]

Here's a pic of Christian's (Auxtian) motad on his 1.1. You can see how the pipes are routed around the oil filter and through the stand...then out the right side.

[trbig]

"Toe-ing the line"

Super purdy pipes. Next time though, could ya trim the hair up on that big toe before you go sticking it into the shot?? Maybe some chrome nail polish to match everything??

Tod

[Dan Hodges]

Originally posted by MAXIMAN
Check out the exhaust port flanges in the hardware bag. They look like the OEM. Very heavy...unlike some of the cheesy looking crap on the current crop of headers.

Wow,these pipes are hot and that 4-2-1 design will be killer on the torque scale.

[GNEPIG]

.. thanx for the pics Cody, those are very nice. are the header pipes dubble walled like the stock ones? and can i ask how much you paid?.. cant wait to see how they dyno.
.. it would be cool if you could get a dyno run of your stock bike with just the new exhaust installed

[MAXIMAN]

I don't think they are double walled. The metal does look heavy though. They are triple chrome plated.

To my door from the U.K. it was about $550. Shipping alone was about $150.

It would be interesting to see what the stock bike would do with just the header. But it doesn't make economic sense. I have to pay for dyno time and I am not going to pay for a dry run. We have a run from the stock bike a few weeks ago and it made 72 hp and 54 torque I think. So will run it after all the mods and tune it on the dyno.

Dan Hodges sent me a brochure from Mac years ago when they made a similar design. It was a Tri-Y 4-2-1 header. They showed a gain of 8 hp from the addition of the header and no other mods. The stock XS11 they dyno'd came in at 73 rwhp. After the header it made 81 hp.

[Shuriken]

Very pretty pipes.