Heat wrapping the turbos and down pipe?
#1
I'm sorry wha?
Thread Starter
Heat wrapping the turbos and down pipe?
I've heard of people wrapping the down pipe. But I was wondering if anyone has covered up the exhaust part of the twins in heat insulating material to slow down boost lag and make some more power? I was contimplating making a custom heat shield for the twins but my only worries are over heating the oil in them and causing them to crack.....
#3
2/4 wheel cornering fiend
The exhaust portion of the stock twins already generates (and retains) a ton of heat. You won't reduce any boost lag by trying to retain any more heat (besides, with the stock twins, there's hardly any); the exhaust turbines are already positioned in the ideal spot for performance, right outside the exhaust port.
#4
I'm sorry wha?
Thread Starter
right well my stock plates are all gone....they were never there to begin with...wouldn't it reduce under hood temps to cover the downpie and exhuast part of the turbos though?
#5
Potato Love
Wrap that down pipe in fiberglass! Keeps the heat off the engine. I did it to mine and it was well worth the 30 bucks I sunk into it. It didn't take long, either.
#6
2/4 wheel cornering fiend
Originally Posted by Xeros
right well my stock plates are all gone....they were never there to begin with...wouldn't it reduce under hood temps to cover the downpie and exhuast part of the turbos though?
The concept behind wrapping/coating the DP is to keep the exhaust gas velocity high; simply getting rid of the pre-cat does the majority of underhood temp reduction.
#7
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Thread Starter
Originally Posted by Kento
You can cover the downpipe, but attempting to cover the exhaust turbine housing will be difficult at best, and the heat retention will cause premature cracking of the cast iron exhaust manifold.
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#9
5yr member, joined 2001
Originally Posted by Larz
Wrap that down pipe in fiberglass! Keeps the heat off the engine. I did it to mine and it was well worth the 30 bucks I sunk into it. It didn't take long, either.
#10
I covered my turbines and primaries in cooperknit, which is a thick (~0.5") knitted fiberglas mat. It drastically reduced the radiant heat in the area and dropped the average intake air temp about 10 degC, and keeps the oil drains nice and cool.
#12
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The MP replaces the CAT. The DP replaces the precat. It is advised to get an upgraded ECU when performing this mod to help with the boost spike and creep that will occur
#14
Moderator
iTrader: (7)
You can remove the precat and put in a downpipe without worrying much about it. If you've already got an aftermarket intake and muffler, you'll about be at the limit of the stock ECU.
It's replacing the main cat with a midpipe that introduces boost questions. I dont' recommend that for several reasons, one of which is passing smog.
Dave
It's replacing the main cat with a midpipe that introduces boost questions. I dont' recommend that for several reasons, one of which is passing smog.
Dave
#15
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A friend of mine made a turbo blanket out of pipe wrap, it lays over the turbo and blocks heat from the lim, and Y-pipe as well as reducing overall temps under the hood. So far as i know there's no ill effect from doing this as far as excess heat in the turbo's or more heating of the oil in the oil lines. I greatly reduced the under hood temperatures and the amount of time it takes for the under hood temperatures to drop. Jack
#16
Eats, Sleeps, Dreams Rotary
iTrader: (14)
I'm not sure that people realize that getting a downpipe coated is not all that expensive. I got mine JetHot 2000 coated for $75. Other lower temperature coatings are even cheaper. Even with $30 or for shipping it is still only $50 or so more expensive than wrapping material and t-bolts.
It is also a lot less effort, coats both the inside and the outside of the downpipe so is presumably much more effective at getting heat out of the engine bay, and you will probably get your $50 back when you sell the downpipe.
It is also a lot less effort, coats both the inside and the outside of the downpipe so is presumably much more effective at getting heat out of the engine bay, and you will probably get your $50 back when you sell the downpipe.
Last edited by moconnor; 04-11-05 at 04:23 PM.
#18
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Originally Posted by dgeesaman
You can remove the precat and put in a downpipe without worrying much about it. If you've already got an aftermarket intake and muffler, you'll about be at the limit of the stock ECU.
It's replacing the main cat with a midpipe that introduces boost questions. I dont' recommend that for several reasons, one of which is passing smog.
Dave
It's replacing the main cat with a midpipe that introduces boost questions. I dont' recommend that for several reasons, one of which is passing smog.
Dave
iknow the q's r rather cumbersome but believe me..im theonly one in my little circle with a clue about this car.. and that aint very much either. so...yea..either way u guys r awsome and i appreicat the help and support.
#19
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Originally Posted by riptor
^^just to be sure i get this right.....i already have aftermarket intake...so installing a dp and catback would be about all i can do on the stock ecu. and i presume the next step would be to investet in upgraded/piggyback ecu or the apexi ecu thingy??
iknow the q's r rather cumbersome but believe me..im theonly one in my little circle with a clue about this car.. and that aint very much either. so...yea..either way u guys r awsome and i appreicat the help and support.
iknow the q's r rather cumbersome but believe me..im theonly one in my little circle with a clue about this car.. and that aint very much either. so...yea..either way u guys r awsome and i appreicat the help and support.
#21
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Does the fiberglass turn black, harden or stick(glue) to the downpipe?
Originally Posted by Larz
Wrap that down pipe in fiberglass! Keeps the heat off the engine. I did it to mine and it was well worth the 30 bucks I sunk into it. It didn't take long, either.
#22
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Originally Posted by bee
You should be fine assuming you can keep the boost at 10 psi. The problem with a mid pipe is that most people experience large boost spikes after installing one. You should be fine installing a dp and cat back, although make sure you have a boost gauge first. When I bought my car it was completly stock other than a cat back exhaust, installing a dp caused large enough boost spikes to hit the fuel cut nearly everytime I floored it in 4th gear. I removed the pill from the wastegate line and that temporarly solved my boost problem until I could get a boost controller.
#23
I'm sorry wha?
Thread Starter
What kind of fiber glass sheets and resin did you use when wrappign your Downpipes and turbos? I was also curiose if you guys saw any burning or slightl smokign from doing this? Is it possible for some of you guys to post pics of this?
#24
5yr member, joined 2001
Originally Posted by Xeros
What kind of fiber glass sheets and resin did you use when wrappign your Downpipes and turbos? I was also curiose if you guys saw any burning or slightl smokign from doing this? Is it possible for some of you guys to post pics of this?
Just be careful when using fiberglass. Don't get it in your eyes and wash your hands THOROUGHLY after using it. Also, don't touch yourself in any way. If you have an itch, use a screwdriver or something.