Will this help on the rotory or will it hurt. I remember reading a post about how rotory engines don't scavange the exhaust gasses so wrapping the header would only reduce under hood temps. anyone care to expand on this.

 

It was good on my previous car...but that was a Neon. So, I don't really know. I don't think it could hurt...Unless someone disagrees with me.

 

I did mine. You will get lots of contradicting opinions about this subject. Both ways have their pros and cons, so it is up to you to decide what is important. This has also been covered extensivelly, so try a search.

 

Pros - less underhood temps, slight power increase
Cons - voids ALL exhaust header warentees, may damage thin wall & lightweight headers

 

What about stock exaust system...

I have some wrap left over from my boat.

Wrap or no wrap?

 

Makes sense only if you have full headers / downpipe. Exhaust wrap won't do jack if you have the pre-cat, exhaust collector, and other stock pieces.

 

great thanks for the info.

 

i've thought about doing this to my rb system. will it hurt the header?

 

reduce underhood temp= good =0)

 

High engine bay temp can kill performance, you can wrap the exhaust, but as far as any gains, no. You may have to check your cats for meltdown due to higher exhaust tems. I have only had it happen to my old Capri, but it does happen.

 

Alright here's what I've experienced. The wrap will keep underhood temps down. And the heat withing the exhaust gas. Higher exhaust temps, means the gas carries more energy. More energy, more velocity=better performance.

The down side is that when it rains, and or when the wrap becomes wet, it retains moisture. Thus expediting the whole rust thing.

You could double wrap it, or the smarter way would be to paint the wrap, which acts as a sealer. I've sealed the wrap on my down pipe and when i removed to Ceramic coat it, it was in really good shape. Very LITTLE surface rust. It was mild steel anyhow, some was expected.

 

is extra rust a problem on stainless headers, or should they be fine?

 

what did you use to paint them?

 

A coating is a better idea than wrapping...there are many coatings like Jet Hot that keep heat within the pipe rather than letting it radiate out in the engine bay and it won't rust.

 

Jet Hot's fairly affordable, but you'd ONLY want to do headers or a downpipe. To do the whole exhaust is $$$ cause it's like $15-$25/foot I believe.

 

For the MAXIMUM you'd have to do the whole exhaust. But if you only did the headers you would feel the benefits. I painted them with some sealer from the Summit Catalogue. I just bought the wrap and sealer at the same time. After i Ceramic coated it, i wrapped it up again. After a 1/4 mile run you could put your hand on the DP and NOT get burn......It was no longer a blazing furnace down there.

 

isnt stainless like already rust avoidant?

 

it is rust avoidant but over time and weather conditions it can still rust but would certinally last longer than non stainless headers. i think the wrap is a good idea, the engine bay was definitly hotter when i had my headers on.

 

I've wrapped my RB headers. RB headers (the ones I bought at least) are very thick, chrome plated mild steel.

Keeps engine bay temps down, and traps that energy inside the header.

I have slight corrosion on the header from the tape after about six months of it being on there.

Good stuff.

 

>The down side is that when it rains, and or when the >wrap becomes wet, it retains moisture. Thus >expediting the whole rust thing.

That's what happened on the chevy engine I stuck in my vanagon... The header wrap got wet and the headers rusted out from the inside...

yay for 5' flames though

 

I was thinking of getting the Header wrap pre made blankets for my car.

I was going to wrap the hotside of the turbo to prevent heat soak into the LIM and compressor side since I don't have stock heat shields.

Any thoughts on this????

 

If it gets hot, wrap it!

(Stay AWAY from the radiator!)

 

so could you use that jet hot stuff on the hotside? has anyone tried this?

 

The Jet hot place is about a mile from where I am right now.

I even watch a video"Why Jethot?" lol.

It'll do it's job.
You don't usually coat the inside. Just the outside so I would not see any problem doing it.

Just take the hotside off and they will spray it.

When done make sure there are no over spreay marks or problems with the wastegate.

 

Uh, what are you talking about?

On the site it says they normally coat the inside and the outside :O

I suppose thats just for headers? I dont know, undoubtably you could ask them to only coat one side, I guess :O