downpipe....wrap it or leave it?
#1
hi, ive got a mongoose system fitted to my car, and the downpipe (from the turbo back) has no heatshield like the original exhaust. question is, do i put that bandage wrap stuff around it to lower underbonnet temps as the intercooler is just above it? or would this cause the turbo to maintain higher temperatures in itself, i.e. more stress on turbo.
any thoughts?
thanks, ian.
any thoughts?
thanks, ian.
#2
Scooby Regular
Join Date: Oct 2000
Location: West Malling, Kent
Posts: 376
Likes: 0
Received 0 Likes
on
0 Posts
Do it ...
I was advised to wrap the exhaust but was scepticle ... as the pipe was off and the wrap was free I did it anyway.
You will notice the difference, there is a technical explaination to do with thermal dynamics or some **** ... all I know is the boost hits earlier and harder, engine bay temps are down and the smile is bigger
I was advised to wrap the exhaust but was scepticle ... as the pipe was off and the wrap was free I did it anyway.
You will notice the difference, there is a technical explaination to do with thermal dynamics or some **** ... all I know is the boost hits earlier and harder, engine bay temps are down and the smile is bigger
#3
excellent, thanks for that mate. i was going to do it a few weeks back, but then read something about someone removing some previously fitted wrap to find the exhaust in a right mess. but i suspect it was maybe mild steel and the wrap held water and rotted it etc....who knows!
anyway, mine's stainless and i can have the downpipe off in 15mins, so will do it this week!
thanks again,
ian
anyway, mine's stainless and i can have the downpipe off in 15mins, so will do it this week!
thanks again,
ian
#5
hi johnny, dp removal comes from practice, first clutch went: gearbox out.......then gearbox went: out again!!
as for the wrap, ill get mine from Demon Tweeks in wrexham next week, as im gonna get a boost gauge aswell (finally!).
any good tuning accessory shop should have some.
if you get stuck, i can get you some and post it to you. although ill have to figure out how much i need first.
thanks
ian
as for the wrap, ill get mine from Demon Tweeks in wrexham next week, as im gonna get a boost gauge aswell (finally!).
any good tuning accessory shop should have some.
if you get stuck, i can get you some and post it to you. although ill have to figure out how much i need first.
thanks
ian
#7
Scooby Regular
iTrader: (1)
Hi Ian,
I've been thinkin' about gettin' the DP wrapped too. I had a look thru' the Demon Tweeks Motorsport catalogue and found that they do a high temperature thermal barrier paint for about £25. Cheaper than the wrap and probably easier to put on. Don't know if it will be as effective but it shouldnt let water get under it. Im thinkin' of doin the exhaust manifold too so i can get rid of the heatshields at the front that keep cracking and then rattling.
Just a thought,
Tony.
I've been thinkin' about gettin' the DP wrapped too. I had a look thru' the Demon Tweeks Motorsport catalogue and found that they do a high temperature thermal barrier paint for about £25. Cheaper than the wrap and probably easier to put on. Don't know if it will be as effective but it shouldnt let water get under it. Im thinkin' of doin the exhaust manifold too so i can get rid of the heatshields at the front that keep cracking and then rattling.
Just a thought,
Tony.
Trending Topics
#9
hi tony, have seen that paint, but due to the thickness, not sure about the effects being the same, but you never know. i think ill use the wrap though, as my pipe is stainless steel, so wont rot.
as for the flamin manifold, i have a cracked heatsheild which tingles away on idle, so think ill wrap that aswell, and while its off, ill port the manifolds.
cheers
ian
as for the flamin manifold, i have a cracked heatsheild which tingles away on idle, so think ill wrap that aswell, and while its off, ill port the manifolds.
cheers
ian
#10
RT, you just squeezed that message in before i posted mine......
yes, youre right, the wrap keeps the heat in, and yes hotter air is less dense, and so flows quicker. unsure what effect this will have on turbo temps though if the manifold is wrapped. anyone any ideas?
ian
yes, youre right, the wrap keeps the heat in, and yes hotter air is less dense, and so flows quicker. unsure what effect this will have on turbo temps though if the manifold is wrapped. anyone any ideas?
ian
#13
ceramic coating does.........
especially if you have it done to a new d/p (so it can be done inside and out)
my under bonnet temps were down to approx 5 degrees above ambient (moderate driving).
m
especially if you have it done to a new d/p (so it can be done inside and out)
my under bonnet temps were down to approx 5 degrees above ambient (moderate driving).
m
#15
Course the wrapping works...
Anything that reduces heat in the engine bay and increases the life of the turbo (directly over the downpipe) has got to be good -why dya think a heat shield is fitted as standard??? duuuuuuuhhhhhhhhh
Anything that reduces temps on the top mount is very good and I would put money on it increases the RR figures!!
Of course WI is much better but the basics are always good -
Anything that reduces heat in the engine bay and increases the life of the turbo (directly over the downpipe) has got to be good -why dya think a heat shield is fitted as standard??? duuuuuuuhhhhhhhhh
Anything that reduces temps on the top mount is very good and I would put money on it increases the RR figures!!
Of course WI is much better but the basics are always good -
#16
Ceramic coating has the same effect - keeps the heat down - ala BPM - problem is the d/pipe rusts quick and destroys the benefit.. after a while....
Bladrunner needs all the help he can get after last months results - or was it that diesel engine with the odd turbo (erm.. I mean pipe) missing....
Bladrunner needs all the help he can get after last months results - or was it that diesel engine with the odd turbo (erm.. I mean pipe) missing....
#18
With an uppipe, I read you will minus the EGT by 100-120° C, because you remove the hot spot of the cat.
So, what about wraping the uppipe, before the turbo ?
I will certainly help the engine bay to be not too warm but, will it raise the turbo internal temperature ?
A friend of mine did the mod :
Any feedback in England ?
So, what about wraping the uppipe, before the turbo ?
I will certainly help the engine bay to be not too warm but, will it raise the turbo internal temperature ?
A friend of mine did the mod :
Any feedback in England ?
#20
Steve, I agree with JC re tone of reply.
IMHO the original downpipe is encased for two reasons
1 - To protect the surrounding brake, clutch and cables etc from direct radient heat.
2 - To retain the heat within the Cat to minimise warm up time.
I am quite sure that exhaust gas velocity was not a primary reason.
I would also question your logic on why a lagged downpipe would increase turbo reliability ? The turbo is hotter than the downpipe therefore the heat flows away from the turbo via the downpipe. If you lag the downpipe, it becomes less efficient at heat dispersal and therefore the turbo runs hotter not cooler.
I do agree that a lagged downpipe will increase turbo thermal operational efficiency and it will also lower charge temps whilst at lower mph.
cc
[Edited by Cosie Convert - 2/26/2002 8:13:08 PM]
IMHO the original downpipe is encased for two reasons
1 - To protect the surrounding brake, clutch and cables etc from direct radient heat.
2 - To retain the heat within the Cat to minimise warm up time.
I am quite sure that exhaust gas velocity was not a primary reason.
I would also question your logic on why a lagged downpipe would increase turbo reliability ? The turbo is hotter than the downpipe therefore the heat flows away from the turbo via the downpipe. If you lag the downpipe, it becomes less efficient at heat dispersal and therefore the turbo runs hotter not cooler.
I do agree that a lagged downpipe will increase turbo thermal operational efficiency and it will also lower charge temps whilst at lower mph.
cc
[Edited by Cosie Convert - 2/26/2002 8:13:08 PM]
#22
After running my DP unwrapped for about a year I decided to wrap it to hopefully get the rest of the exhaust hotter in the pursuit of flames. Sad I know but its my car so sod off Anyway the car is now quieter inside due to the lagging and also the pops are louder. Still not sure if I'm getting flames but I'm working on that one.
Oh and am I the only one who wrapped their DP whilst it was on the car....
DaveW
Oh and am I the only one who wrapped their DP whilst it was on the car....
DaveW
#25
hmmm, i see a wrapped manifold, im gonna wrap mine, and the downpipe and itll eliminate that annoying cracked heatshield.
you notice any differences wrapping the manifold?
im gonna port mine at the same time...
ian
you notice any differences wrapping the manifold?
im gonna port mine at the same time...
ian
#28
I haven't noticed any performance difference but if it keeps the under bonnet temps down in the summer then it will be worth it. Even in this weather it seems cooler but then I haven't checked temps. One thing I have noticed is that the gearbox is taking longer to heat up, so the temps down there have definately come down.
DaveW
DaveW
Thread
Thread Starter
Forum
Replies
Last Post
Sam Witwicky
Engine Management and ECU Remapping
17
13 November 2015 10:49 AM