I have heard the epoxy many choose to use for the process of filling the intake ports is Devcon. They sell numerous types and I was trying to find the most appropriate. I contacted them and they suggested the Plastic Steel Putty for up to 250 degrees F and the Titanium putty for up to 350 degrees F.

Do you think the Plastic Steel putty would suffice? I already have a 1lb container and would like to use it if possible. I'm hoping the epoxy wouldn't see over 250 degrees since the coolant will be circulating through the housings.

 

I've never done it but have seen plastic steel used for this. I don't think longevity is the issue with the Devcon as the motors don't tend to last that long anyway!

 

Thanks for the reply.

Why is it that many people seem to think peripheral ports will not last a good while? If properly built shouldn't they outlast a bridgeport by quite some time?

 

If you could source housings that never had the intakes cast into them then yes

The filled intake ports deteriorate. Plus you often use more revs than any other config, and wear increases exponentially at high rom!

Mind you, I have had a Devconned PP last 18 months before needing a rebuild

 

I saw a set of brand new irons in Japan for a peripheral port motor, the irons were from Mazda and came filled, I think you have to know the secret handshake to get stuff like that directly from Mazda...

They used devcon metallic epoxy, but it wasn't all the way filled with that, on the outside of the iron, white silicone was visible, the guy who had it , through a translator, was saying something about there being a problem with adhesion in the curing if the epoxy is to thick, so its done in small amounts, and not all the way through the port...Hope that helps you..I have a pic of it somewhere I will dig up...Maxt

 

Thanks Maxt! A pic would be a great help.

 

18 months?



Geez, I ran my 13B PP race engine for 5 years of regular competition before a spun rear bearing necessitated having to tear it down for a rebuild. I'll post some pics of the housings when I get home, which required no more than a wipe over to clean them. Compared to the rotors I looked at in one of the other posts, mine were like new. Again, I'll post a couple of pics for you guys to check out.



Cheers from downunda,

Peter

 

Here are some photos of the housings showing the peripheral porting.

 

Thanks, those are nice pics!!!

Anyone else have any they would like to share?

 

5 years is a good run!

I was using mine as a DD as well as a weekend warrior....10 mpg an all



What can I say? I was young & stoopid