The Mad Max - my 92 elite... we are still "building"?

[elitedio]

Pibb
What I mean is that if you have an expansion chamber you may boost too much in the powerband and overheat the engine. Probably a stock exhaust would mellow the amount of boost and be fine. The expansion chamber offers a strong boost of power by extracting and then assisting in the refill of the combustion chamber over a narrow range of rpm. With a total amount of charge increase of about 14psi or about twice the pressure of the normal atmosphere (15PSI). A stock exhaust offers a wide broad powerband which limits the boost. Most standard two stokes are around 7:1 compression and can tolerate a lot more boost by using a tuned pipe.

The boost is markedly amplified by the compression ratio.

I hope that I am not talking down to you.

[mr pibbs]

I hope that I am not talking down to you.

I was actually thinking that I need to do a whole lot more studying. I understand the principles, but I am far out of field with engines in general. Thanks for the help.

[JONESER]

Mr. Pibbs. My buddies '93 looks exactly like yours! I see you have done quite a bit to yours already. Can you give me some info to pass along? As I posted in my other post, he's wanting to get gears. Where can they be found and how much did they cost ya? Were also in the Tampa area....

[mr pibbs]

Just got a new CHT in the mail - $16 shipped from ebay.
One downside - it's huge! 3 inch diameter circle/ 4 in diagonal square.

[novs86]

You just need a large gold chain and you can look like Flavor Flav with that hanging from your neck .

[mr pibbs]

Decided to install the tinytach knock-off. Got it on ebay for under $20.

First problem: the cable was too short. I was looking to put the tach on the dash, but the sensor wire was only 3 feet long.
Solution: Speaker wire.



As stated I wanted to install on the dash so I could read while riding easily. I made a template of the square and decided to cut the space out of the dash. Dash was cut with dremel. The pictures speak for themselves.















In the future I intend on taking some wire and opening it up around the edge of the hole to pseudo weatherproof and clean up the small blemishes.

Thanks for reading.

[Wheelman-111]

Greetings:

Very nice installation and excellent documentation, Mr. Pibbs! Puts my double-stick tape and plastic wedges to shame...

Can you supply the eBay source for that "knockoff"? My several beefs with the Tiny Tach include the lack of lighting, the slow (2.5 seconds) update rate, and the 9999RPM limit. And it cost almost twice the price you mentioned!

[novs86]

Looks good pibbs!!

[burnt_toast]

i like the tach placement and agree that is once huggee cht lol

but dang good price, compared to the $50 i just dropped on another westach

[mr pibbs]

i like the tach placement and agree that is once huggee cht lol

but dang good price, compared to the $50 i just dropped on another westach

The thing huge. I want to put it on the dash, but I am running out of plastic to grind up.

Funny story: After I bought it (for $16.50, to be precise) I emailed the guy and asked if he had any sensors for it. After a few days he emailed me back and let me know he sent two in the mail. It is always nice to come across folks that are not out to squeeze every penny out of you. I know a few of you on the forum.

If you need a j type thermocouple - let me know.

[mr pibbs]

Gears are in - let the tuning begin.

I am, however in need of some advise.

currently running 7.5 g rollers, topping out around 42, usable 40, with tailwind up to about 44 at around 7600 rpm. This seems low.
I put 5gs in first - topped out at 30/35 @ 8500 rpm
7gs - lower top end than my current 7.5s

I am running a stock spring and 1.5k grabber springs.

I realize i cut some corners on the cheap unported bore, but 40 or 42 seems low for 7.8 gears. Any thoughts?

Unfortunately the driven face cannot come apart again 0 the threads on both the face and nut are trashed. Additionally, i think my pads are trashed from heat. Unsure.

All wisdom is welcome.

[turtle13]

Gears are in - let the tuning begin.

I am, however in need of some advise.

currently running 7.5 g rollers, topping out around 42, usable 40, with tailwind up to about 44 at around 7600 rpm. This seems low.
the cheap unported bore, but 40 or 42 seems low for 7.8 gears. Any thoughts?

How's your plug look? that def seems low. i have hit 41 with just a keli variator and no gears... you have more displacement and the taller gears to take you to a higher speed. something has to be off somewhere, and the only thing i can think of is that you may need to go up in roller weight, or are running to rich or to lean.

[turtle13]

i was going back and reading some old threads about rollers http://www.hondaspree.net/phpBB3/viewto ... =aero+belt and came across wheelmans post saying that he ended up using 5.6g rollers for optimum performance. i cant remember if he was running the polini or the malossi kit at the time, but it should be mildly similar. try half 5s and half 7s and see what the out come is. if it improves then you may have had it on either side of to light or to heavy.

[bakaracer]

what variator and what ramp plate are you using?

[mr pibbs]

Keli vari, daywot ramp plate