[DeTomaso] Epoxy in Injector Pockets????

[Ken Green]

Tomas,
 
    I wondered about a press fit and epoxy.  I need to understand epoxy better.  It seems like a press fit would scrape all the epoxy off the mating surfaces, unless the surfaces have scratches that hold some of the epoxy?  Is this an issue or is there a small residue that remains that bonds the parts?  I know that it's good to have a minimum amount of glue between surfaces in most instances, but does that extend to press fits?
 
    The holes will be milled not drilled, so they will be a very good fit.  But, the injector pockets will not be perpendicular to the roof of the runner, so that may affect a press fit?
 
Ken    

--- On Wed, 1/20/10, Tomas Gunnarsson <guson at home.se> wrote:


From: Tomas Gunnarsson <guson at home.se>
Subject: Re: [DeTomaso] Epoxy in Injector Pockets????
To: detomaso at realbig.com
Date: Wednesday, January 20, 2010, 1:36 PM


I share your feelings regarding epoxying metal to metal in an engine application. How about a loose press fit with the epoxy acting more as a sealant? The loose press fit could be achieved by drilling the holes and/or turning the injector holders to zero press fit, then scarring one of the surfaces for a small interference fit. I haven't seen the parts so I don't know if this is practical though.

Tomas

----- Original Message ----- 
From: "Ken Green" <kenn_green at yahoo.com>
To: <detomaso at realbig.com>
Sent: Wednesday, January 20, 2010 12:31 AM
Subject: [DeTomaso] Epoxy in Injector Pockets????


> I'm having a manifold converted to EFI and the shop thinks it's better to epoxy the injector pockets into the manifold than to weld them. I bought MSD pockets, and they say "epoxy in" on the label. It's a little scary, but there in no structural issue, and it's not like adding epoxy inside ports that can break loose. Is it a waste of $s to have the pockets welded in?
> 
> Ken
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