buy a small fiberglass repair kit and just use the resin.

 

Super job on the pictures... They showed things that I hadn't noticed in the other pictures posted... First time I've seen pictures of the bottom, too. I'm glad you posted them.

Good choice on the CE28N's... of course I'm a bit prejudiced.

 

ah, ok, so like this one?:

http://www.acehardware.com/product/i...ductId=1414939

 

perfect,just scuff the area you plan to apply it to.if you cut the flap it will lay down better.

 

Eagletanggreen also had the same issue with the end caps leaking when he did his dyno testing against the MREV2. He simply sent the caps back for replacements.

Its a little hard to say in your case. It may or may not become an issue. And if you modify them it "may" void the warranty. Ask Cosworth first.

For epoxy information, visit http://www.mcmaster.com/
Enter "Epoxy" in the product finder or enter "3314" in the catalog page finder for descriptions of the various epoxies and applications.

Anything you use will be regularly exposed to soakback temperatures of ~170'F about 5 minutes after you park the car after a drive across town.

So any epoxy has to be good to at least 170'F.

If you use any epoxy, I suggest a putty. Most putties will take the temperature, are easily formed, won't sag and are sandable.

 

Nice pics. Thx for sharing. Are you planning to go FI? Was currious why you bought the cosworth plenum?

 

Yes, I plan to go with the HKS Gt sc when it is released

 

Thanks for the reply Tony,

Cosworth was sent the pictures and they were of the opinion that it would not affect the seal. They did however, offer replacements for my peace of mind if I so choose. What do you think? I'm not sure exactly what problems eagletang had with his endcaps, but I'm hoping this is just something cosmetic and small and easily fixable, but I am being cautious nonetheless.

 

looks like an easy fix,DO NOT use epoxy it will flake and be ingested.fiberglass resin is the same as carbon fiber resin and on some level will fuse/meld to the existing resin,they will become one instead of something sticking to something else.summary......resin good......epoxy bad.

 

After some carfeful thought and looking it over with my tech, we decided to not bother with anything--could grind it away a little bit, but don't think any resin will be used as the seal is likely to be unaffected. Cosworth does stand behind its product though, so I am proceeding with install and the dyno and will hope for the best.

btw, the end caps are REALLY thick and should hold boost no problem if sealed correctly--there must be like 30 layers of cf put together

 

That depends on the type of resin used. Resin is typically polystyrene resin, polyester resin or even epoxy resin.

Carbonfiber is more typically used with epoxy or polyester.

 

I will be picking up my car tomorrow with the Cosworth plenum installed, I might be able to make it to the dyno by the end of the week, but we just got hit with 12 inches of snow and 8 more is coming.
I should have some installed pics tomorrow.

 

Thats just flat out wrong. There is more than one type of resin commonly used in composites, including polyester, vinyl-ester and epoxy. High strength composite parts are made with "epoxy" resins. Saying that resin=good and epoxy=bad makes no sense.

I wouldnt worry about it. You should be fine.

 

you need to re-read,hydrazine said epoxy NOT epoxy resin which if you know is very different. resins- polyester and epoxy are used conjunction,therefore they are compatible.polytester is often used for gel coat due to the fact epoxy resin turns chalky when exposed to ultra-violet(sunlight).since these caps appear very cosmetic i would assume polyester was used,if not both.....a bit of info for ya,but you only really need to concentrate on the first sentence.

 

Epoxy and epoxy resin are the same. Regardless of name or application.

Epoxy can be called a glue, coating, adhesive, resin or a polymer but its still the same amine based chemical compound.

To say that "epoxy" doesn't bond well with "resin" depends on what kind of resin it is. A "resin" can be or imply just about anything.

 

Right on. It probably won't be any issue anyways. And Cosworth will take care of you in any case.

 

Yes, lots of sunlight under the hood. So why wouldnt he want to use epoxy to fix the inside, non visible portion of the cap, which sees absolutely no sunlight? Because epoxy doesn't stick to epoxy right?

 

epoxy and epoxy resin are not the same,you posted bad info and are just trying to backpeddle.if you acually had any good advice it would not be generic epoxy from mcmaster.next time you feel like making things up at least offer good reference.www.fgci.com

 

he can order some epoxy up if he wished,but overkill in price and availability when a trip down to the corner store would solve his minor mat seperation problem.fiber end caps are bling,if cosworth made cast caps to match thermal expansion it would be more of an engineering solution and every one would have their manifolds already.not to mention at a lower cost.btwy epoxy gel chalks up almost right away,and i'm sure a discriminating customer such as yourself would find that unacceptable.

 

???
You said:
Resin by itself doesn't meany anything other than a viscous liquid (natural or manufactured) that polymerizes or solidifies. The chemistry can be anything.

Fiberglass is most commonly used with polystyrene resin. And it would be correct to say that epoxy will not bond well to polystyrene resin. The converse is also true. Fiberglass resin will not adhere well to epoxy.

The compatibility of epoxy with a "resin" depends on the type of resin being used. And there are many different kinds of resins. Carbonfiber is typically epoxy or polyester based. Polystyrene resin is almost never used with carbonfiber.

Compatibility is dependant on the chemistry of the resin(s) being used.

But for you to say "Epoxy resin is not epoxy" is entirely incorrect.
To say epoxy won't react or molecularly bond or fuse with epoxy resin would also be incorrect. They will indeed molecularly bond and become one large macro molecule.

Do you have a background in Chemistry, composites or polymers?