as it says above just about to order my new vortex afterburner exhaust and wondering if its worth buying heat wrap and what is the benefit ?

 

not really any benefit on the whole system, just the headers, up and down pipes. you'll need about 20m to do those.

 

thanks mate ill leave it then

 

Definately worth wrapping the headers etc, will get you some extra pops/bangs on over-run, wrc style

 

Best place to buy the wrap from??

 

I'm in similar position to you mate been looking on eBay but not sure if they're any good. People talk a out DEI wrap being good but am not sure.

Martin

 

Is it possible to wrap the headers/uppipe/downpipe without taking them off? (I have a classic)

 

My car was mapped to pop and bang something crazy, with the headers and downpipe wrapped I found it made the car pop, bang and flame a hell of alot more often

 

What does the wrap actually do to create the pops and bangs?

 

Wrapping will keep the exhaust gasses hot for faster and better flow to the turbo, worth while it

 

prevents most heat dispersion into the atmosphere, keeping your headers much hotter

when raw fuel hits superheated cast iron or stainless, it immediately combusts

 

Would you get the same effect by wrapping the up and downpipe and not the headers? Would it still pop n bang as much?

 

DEI heatwrap is the stuff to have and Harvey is the man to get it off, he will also do them for you on an exchange basis, i believe, no doubt he will be along shortly to answer all your questions..

 

Hope so id send him mine to wrap. Come on Harvey get on mate lol

 

I once wrapped a complete exhaust in the mistaken belief that it would help to deaden the noise. There is no performance gain and as I found out after half a morning or more and four rolls of DEI wrap it did not deaden the noise.
As already said by The Hamster it is certainly worthwhile wrapping headers, uppipe and downpipe. This will take 2 x 50 foot rolls of 2" DEI wrap. I only use DEI wrap because of its quality and thermal ability. It also has a stitching down the side to act as an overlap guide which makes it economical in use.
To wrap any of these three components you need them off the car or you are wasting your time.
Popping and banging in the exhaust occurs when excess fuel goes in to the hot exhaust system and ignites (explodes). There is no guarantee you will get pops and bangs from wrapping headers, uppipe, downpipe unless there is already excess fuel there and if that is what you want you need to request pops and bangs from your mapper to be sure this happens. If there is already excess fuel there obviously the hotter exhaust system from the wrapping will extenuate the effect of the pops and bangs.
50 foot x 2" roll £55.00 plus postage. You can get stuff half the price on e-Bay but I have customers with wrapped headers from over 3 or 4 years ago.

 

The benefit of wrapping your headers, up-pipe and downpipe is that it helps keep the gas speed up. The job of the manifold and up-pipe is to translate as much kinetic energy onto the turbine wheel, which is already an uphill battle in flat 4 engines due to the length the pipework needs to be. As the gas cools, energy is lost which in turn increases lag. Wrapping the pipes helps to keep the gasses hot by reducing the heat transfer effect. The hotter gas is, the quicker it moves, the cooler it is the slower it moves.

So wrapping can actually help to reduce lag.

 

Thats a decent price Harvey.

I shall be getting in touch with you for some of that and a 3 port boost solenoid in a few weeks.

 

All in stock and ready to go.

 

I'm going to be fitting a wrapped downpipe. (eventually)

Is it worth, while I have it all apart fitting a turbo blanket to help with the under bonnet temps?

If so what blanket would you recommend for a VF23?

 

slightly off track...what are the benifits on a non-turbo engine (not a scoob BTW )

theres a roll of 2"x50' on ebay £20+£5 p&p no bids 9 hours to go

 

The benefits on a non turbo engine are similar to those on a turbo engine. Hot gas flows easier than cold gas but remember you don't have a turbo to spool.
Using quality wrap done properly, there are plenty customers out there who have had wrapped uppipes, downpipes and headers three years ago and more and it is still intact.
Use cheap wrap and chances are it doesn't have the thermal properties and in addition it will have fallen off in a matter of months.

 

 

As Harvey said, its the same with any engine, the quicker you can get the gasses out, the quicker you can get the air/fuel mixture in. Keeping gas speeds high helps the scavenging effect of the exhaust headers and will increase performance. It's never giong to be as noticeable as a turbocharged motor as the turbo amplifies the effect, but it all helps. Plus it helps to keep the engine bay cool which helps with intake/coolant temps.

 

i have been thinking of this for a while now for my little nova rally car every 1/4 bhp gain much needed

 

not many nova's kicking about these days used to love mine 1.3sr bright red great car

 

i have 2, sri for the rallying and a spare, future classic???

 

Is it one roll of dei to wrap a set of gt spec headera?

 

Done properly, with the proper overlap, keeping the wrap tight and doing each runner individually you will use a full 50 foot roll x 2" DEI heat wrap. Do not soak it but apply it damp.
On the GT2 spec headers with the 3 bolt uppipe you will benefit tremendously in spool and response from my trick uppipe which comes DEI heat wrapped anyway.

 

Can you PM me the details on the up pipe Harvey? i'm running unwrapped 3 bolt GT currently.

 

The 3 bolt uppipe, referred to as the Harvey Trick Uppipe is stainless steel, slip jointed, and supplied DEI heat wrapped with five new Subaru studs. This replaces the 3 bolt uppipe supplied with the GT2 tubular header sets (which we also supply).
You cannot fit this uppipe without a remap as the spool is that much earlier and reported as 250-500 to 1 bar in 4th earlier by various users that previously had the original supplied uppipe.
Developing this uppipe took 12 months of fairly intensive trial and error including flow bench testing time and the improvements were such that when we fitted the first couple to customer's cars we thought the results were a fluke. This is now the norm.
You will find the car more responsive and willing and it will spool far earlier with more torque right across the rev range and no loss of power. This has been fitted to almost everything from really low bhp, mid 300s to over 700 bhp and of all the things I have designed or developed this probably has the biggest results for the least spend.
As I said stainless, slip jointed, DEI heat wrapped with five new studs. £149. We fit for a fixed £75 or delivery £12.50.