Wraping Dp question
 

#1 where do they sell it? :lol: pepboys or anyplace like that?

#2 how much length should i get, and do i only do 1 wrap around the dp or go for another pass?

i am sending out my tail lights to be converted to 99 spec and while the cars going to be down i wanted to get rid of some of the extra heat. iv never done this before so i have no idea how to do it.

i hear it will eat away at the dp or something..

was thinking also about coating it, but not sure how much that costs.

I have done the wrap. I got a DEI header wrap kit at a local parts store. It might be too technical for Pep Boys though. A speed shop will definitely have it. I wrapped it with a half-overlap so that when I was done it was almost two layers thick everywhere.

In the end I didn't like it. Every time I was under the car or working on the exhaust I got fiberglass fibers in my face and arms. I took it off and now there is nothing on mine, not a big deal. If you have a carbon steel downpipe then yes you should take care that it might promote rusting.

DT Performance in Plantation sells it... 954-689-7754
It helps keep heat down but does not eliminate it completely. I have it on my cars and so far I am pleased with it...


L8R

I wrapped my M2 mild steel DP for the time first about 5 years ago. When I removed it two years ago to rebuild the engine, there was some pitting, but nothing dramatic that threatened the integrity. I sanded it down and painted it with the DEI silicone sealant...good to 1500 F. IIRC. Then I re-wrapped it and sealed it again with the DEI spray. Do that and you don't have the very valid "itch" issues that degeesaman mentioned when working next to it. And it insulates well enough that by the time I run my car up on the lift, I can grab the DP with my bare hands. IIRC, the DEI instuctions recommend soaking it in water. Never tried that, but it might help if your doing it with the DP on the car. IMO save your money on the DEI wrap ties and just get some good quality stainless worm-gear clamps. At the ends, I folded the strip of wrap into a point and centered the point under the clamp for a clean, no fray end.

BTW, the DEI spray worked well on the turbo heatshielding too. Did it while everything was off for the rebuild. With a little sanding pad and rinse, it's stuck VERY well and covered all the rust pitting that comes with time.

Ideally, have it Jet-hot coated or some other heat-coating. They do look better but either way, I can't imagine running without something to reduce the heat.

Don't spend the money on coating it.. I have mine coated and wrapped.... coating alone still produced heat...that's why I ended up wrapping it also... I was disappointed with the coating and what it cost to have it done..


L8R

would anyone know what length to get?, its not hard to take off the dp is it?

for the coating.. are u suppose to apply it on the dp first and then wrap it? or apply on the dp first and wrap it and then appy the coating again?

or just apply the coating after wrapping it?

thanks

i figure why not do both if you have enough in the can? i could be wrong. since i know jack about it

As I mentioned above, I had a mild steel DP and wanted to keep it from rusting so I gave it a quick sanding, cleaned with some reducer and sprayed it if first before the wrap then sprayed it again to seal the wrap. If you had a stainless DP there would be no sense in spraying the DP first.
If your careful, the can goes a long way...of course it's a lot easier to be careful when it's off the car.

matter of fact, i do have a stainless dp .. and if i do both.. will i work better than coating it after wrapping?

thanks

you said that you wet the wrap before putting it on, would you have to wait for it to dry before applying the spray?

No. The spray is just to help preserve and seal the wrap. The wrap is what insulates the pipe, not the sealant/spray. It's just a hi-temp paint.
I didn't try it, but recall the DEI instructions mentioned it. Apparently makes it more pliable. With the DP off it was easy enough to wrap tight as it was. But yes, you'd have to let it dry...which wouldn't take long.

This is NOT hard. Pretty straight-forward stuff.

I wet mine always, it makes for a tighter wrap. IMHO and many others, wrap is less pretty but more effective than ceramic coating.

Ok then does anyone know how much of it I should buy?

I think a 3" dp is 4' for every 1.

Can't remember for sure....I think I bought the 2 inch X 50 ft. roll and it was more than enough. I continued it on the inlet and outlet of my cat to try to reduce the radiant heat to the transmission and tunnel.

yup thats how much you need
try summit
thats where i will get mine

you can also pick up dei kits off ebay with the paint and all included. just search 2" exhaust wrap.

Has anyone ever reused wrap? I have my 3" dp wrapped but was thinking of going 4" dp. The wrap seems to become brittle almost like glass, so it seems unlikely it would work to reuse it. I am curious if anyone ever had success reusing it though.

well i dont want to get it online because i dont wanna wait for shipping

sure. If it's brittle it's probably dirty. It's made of pure fiberglass, so it's extremely unlikely it's hardened.

Dave

It's better to buy whats needed, even if you have to wait a few days for it; than to pick up something that you'll have to redo because of not getting the "right thing". However, you are in Florida; there are MANY speed/specialty shops in that state where you should be able to pick up some heat wrap. Heat wrap is not a rotary thing so just find any shop that soups up cars.

I had my stainless steel dp coated at Calico Coatings in 2006. They do work for Nascar if I'm remembering correctly. I had the CT-24 Coolblack thermal coating done. After it was installed I ran the car for 1/2 hour and I could hold my hand on the dp. the coating is still on there and looks good. I have not put my hand on it since then though. The cost was around 80 bucks at that time. And that was with shipping.

just my 2c fwiw

I think wrapping the DP is a waste of time. There is so much heat coming off the turbos, that the little amount coming off the dp is insignificant. My 2 cents :)