ESE's works engine tuner

[F5 Dave]

I think Ram passed that tidbit out during Fish and chips at a GP after match in the 80s, and probably Pete Sales to him and so on.

[husaberg]

This is where I got it from.

Whoops stopped the higherlighter short

[F5 Dave]

But too late by then.

[lodgernz]

The way I see it is that Devcon B is a steel based epoxy and Devcon F is an aluminium based epoxy. Surely, in an aluminium cylinder, the F would be the way to go as it would have a thermal expansion approx the same as the cylinder.

We have used the F on crankcases and cylinders.

https://www.blackwoods.com.au/adhesi...00g/p/04124908

Expensive, but you've gotta help Australia's ailing economy.

Super expensive with a minimum purchase of 6, and impossible anyway, since they won't ship outside of Australia. I thought only dipshit septics did that

[wobbly]

Ken, Devcon F is a putty , and I tried using that and even with a heated up cylinder sitting at the right angle, the added lump of epoxy would never completely settle flat.
Its bloody near impossible to get it to sit in the right place , prior to angling the cylinder - you cant simply pour it in.
When I tested the 3D printed clamp on outer transfer wall cooling system you made , the hottest the cylinder got was 80*C right at the case gasket line - the rest was
about the same as the water temp at less than 50* - plus the internal transfer walls are all cooled by the incoming A/F mixture.
So I dont think heat expansion is an issue at all.

The " B " is very runny and settles flat the instant it is poured into the cavity.
I have bought several boxes of this stuff from OZ, a friend simply got it and sent it to me by OZ Post, never been an issue.
As its made in OZ , maybe they would tell you what to add to " F " to make it liquid, but dont hold your breath, as I asked them what to use for cleaning up the large plastic syringes
I use to dispense the liquid - no reply.

[ken seeber]

Wob, you want liquid, here is liquid:

https://www.freemansupply.com/datash...iquidputty.pdf

One major source for Devcon appears to be https://itwperformancepolymers.com, but not sure where it is made. They seem to have distributors everywhere in the world, but not Australia or NZ ??

[wobbly]

Thanks Ken , never seen that before. On the box of " B " I have it says Made in Australia by ITW-devcon.com.au.
But I cant find any mention of F2 on the website.

[TZ350]

.
Devcon "B" for those that live in New Zealand. Liquid and Putty.

[TZ350]

.
Australian supplier of Liquid B



Devcon Plastic Steel Liquid (B) Epoxy

• A low viscosity compound with all the properties of Plastic Steel Putty, but in liquid form.
• Used for casting low-cost patterns and molds, holding fixtures, tools and dies.
• Excellent compression strength and high load-bearing capabilities make it ideal for chocking and leveling machinery and bridges and repairing hard to reach areas.

Areas of Application

• Holding fixtures for intricate parts.
• Filling and leveling equipment.
• Repairing hard to reach areas where a flowable epoxy is needed.
• Duplicating or tracing masters.
• Short-run dies and molds.

Features and Benefits

• Low viscosity for easy pouring.
• Can be cast over models for accurate detail reproduction.
• Can be machined to close tolerances.
• Low shrinkage.

[TZ350]

.
Team ESE have had a great deal of success with using Devcon "B", both liquid and putty. Sticks very well in transfer ports....

[flyonly]

.
Team ESE have had a great deal of success with using Devcon "B", both liquid and putty. Sticks very well in transfer ports....

And in exhaust ports? Or is it outside the temperature range?


Sent from my iPhone using Tapatalk

[wobbly]

No - the high heat kills the epoxy in no time.
I have used J-B Weld ExtremeHeat ceramic paste to fill exhaust ducts , it lasted weeks of dyno testing, with no issues,

[Condyn]

I have filled very small weld pinholes in the exhaust duct floor with high temp devcon titanium putty. After dynoing I checked, and it was all gone. I have partially filled water jackets with it as well by using a small airline and a ram rod to jam it deep into the water jacket. It held up well in this area. And of course it always holds up in other areas of the engine. Going to try the liquid stuff and syringe trick to perpendicularize the b-port leading edge soon after plating.
I have also been advised by a reputable builder to try 3M panel bond instead of devcon, but that will be on a low stakes project in case it does not work.

[wobbly]

TeeZee , as you found its way cheaper to buy retail In OZ. Get a friend to buy it and send to you, still way cheaper.

[SwePatrick]

Nitromethane testing to celebrate my youtubechannel have reached a milestone.

Can i reach 100whp in my old Yamaha TZ250? (1kt/2ma engine)

What to expect?
Will the pipes still tune?

As i have watched twostroke stuffing(Alex Degnes) i got curios, can it be done better?
(not more power per cc, but with some more control)

Head on over to my youtube channel and watch, feel free to ask any question.
I´ll try to answer.

https://youtu.be/eLf3PW-9btU