View Poll Results: Who has wrapped and not wrapped there downpipe?
I wrapped my downpipe.
59
46.46%
I did not wrap my downpipe.
68
53.54%
Voters: 127. You may not vote on this poll
To wrap the DP or not to wrap the DP?
#51
1JZ powered
Join Date: Jul 2001
Location: Where there's only two seasons, hot and wet! I love Okinawa
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Originally posted by clayne
Do NOT!! rev to 9500 man. Seriously. Not without the proper bearing and engine setup.
Do NOT!! rev to 9500 man. Seriously. Not without the proper bearing and engine setup.
Guys in the states are just TOO scared to take thier motors past "stock" redline. For a stock turbo, stock redline's great, but a T-45S is FAR from stock.
#52
1JZ powered
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Originally posted by rx-7ml
I'm not quite sure you understand what is happening here. Your exhaust gas temps are not rising from the exhaust ports, they are exactly the same. The position of you EGT probe is likely to be after the wrap, hence you see an increase. If you put the probe before the wrap you wouldn't have seen the rise in EGT's.
The fact your motor blew after installing the wrap is in my unprofessional, but logical opinion, coincidence.
I'm not quite sure you understand what is happening here. Your exhaust gas temps are not rising from the exhaust ports, they are exactly the same. The position of you EGT probe is likely to be after the wrap, hence you see an increase. If you put the probe before the wrap you wouldn't have seen the rise in EGT's.
The fact your motor blew after installing the wrap is in my unprofessional, but logical opinion, coincidence.
#53
Rotarian
Join Date: Aug 2002
Location: United Kingdom
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Originally posted by jspecracer7
Like I said, for what it's worth. I assumed it happened because of that. Either way, I removed the heat wrap and am back down to low EGTs again and no blown motors...at least none from seals cracking
Like I said, for what it's worth. I assumed it happened because of that. Either way, I removed the heat wrap and am back down to low EGTs again and no blown motors...at least none from seals cracking
As long as your happy bud!
#55
Senior Member
Join Date: Apr 2001
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A couple of small points over what some others have said.
If you have a DP that hasn't already been isntalled, or are willing to R&R it, then send it to Jet-Hot or one of the similar places, and make sure to get the high-temp coating. Coat in and out, and give then explicit instructions not to coat the 02 thread.
That will give good thermal protection. If you want to add wrap on top of that it shouldn't hurt, and I did this to subtly alter the tone of the exaust. I can still hear the turbos whine just fine, but it takes some of the sharpness off the idle sound. not a lot but I like the change.
If you aren't up for shipping you DP for coating then you can wrap and you might look into getting a can of the High-Temp silicone paint. This can be used to help fix the wrap in place, and provide a small bit of protection if you are wrapping a non-SS pipe.
If you have a DP that hasn't already been isntalled, or are willing to R&R it, then send it to Jet-Hot or one of the similar places, and make sure to get the high-temp coating. Coat in and out, and give then explicit instructions not to coat the 02 thread.
That will give good thermal protection. If you want to add wrap on top of that it shouldn't hurt, and I did this to subtly alter the tone of the exaust. I can still hear the turbos whine just fine, but it takes some of the sharpness off the idle sound. not a lot but I like the change.
If you aren't up for shipping you DP for coating then you can wrap and you might look into getting a can of the High-Temp silicone paint. This can be used to help fix the wrap in place, and provide a small bit of protection if you are wrapping a non-SS pipe.
#58
call me Smokie Smokerson
Join Date: Aug 2002
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Yeah, i'm sold on the summit racing ones While I was at SuperAutoBacs, it was just tempting as hell; with the product in one hand, wallet in the other....
Any particular difference between "header wrap" and "exhaust wrap"? Any reason not to get header wrap for the entire exhaust system (since it's prob meant for higher temps)?
Any particular difference between "header wrap" and "exhaust wrap"? Any reason not to get header wrap for the entire exhaust system (since it's prob meant for higher temps)?
#59
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Location: Northern California
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Originally posted by ech
A couple of small points over what some others have said.
If you have a DP that hasn't already been isntalled, or are willing to R&R it, then send it to Jet-Hot or one of the similar places, and make sure to get the high-temp coating. Coat in and out, and give then explicit instructions not to coat the 02 thread.
That will give good thermal protection. If you want to add wrap on top of that it shouldn't hurt, and I did this to subtly alter the tone of the exaust. I can still hear the turbos whine just fine, but it takes some of the sharpness off the idle sound. not a lot but I like the change.
If you aren't up for shipping you DP for coating then you can wrap and you might look into getting a can of the High-Temp silicone paint. This can be used to help fix the wrap in place, and provide a small bit of protection if you are wrapping a non-SS pipe.
A couple of small points over what some others have said.
If you have a DP that hasn't already been isntalled, or are willing to R&R it, then send it to Jet-Hot or one of the similar places, and make sure to get the high-temp coating. Coat in and out, and give then explicit instructions not to coat the 02 thread.
That will give good thermal protection. If you want to add wrap on top of that it shouldn't hurt, and I did this to subtly alter the tone of the exaust. I can still hear the turbos whine just fine, but it takes some of the sharpness off the idle sound. not a lot but I like the change.
If you aren't up for shipping you DP for coating then you can wrap and you might look into getting a can of the High-Temp silicone paint. This can be used to help fix the wrap in place, and provide a small bit of protection if you are wrapping a non-SS pipe.
Ech, pretty much answered the question I wanted to ask. I have a DP that is about to go on soon. Does it help to both have the pipe coated and wrap? Anyone else have thoughts on doing both-results and impressions??
#60
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u guyz literaly convincin me to wrap that bitch now.. thats why i stay this forum much more the other. u learn every day.. Thanks
Roar 629--you crack me up man...now go wrap da bitch and tell me the results ok...
Roar 629--you crack me up man...now go wrap da bitch and tell me the results ok...
#61
PV = nRT
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#62
I AM A THIEF!! READ THE FEEDBACK SECTION!
Join Date: Aug 2002
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I say wrap it, there shouldn't be any performance decreases and its sort of a reliability mod, better to change your dp every 5 years than your turbos every 3.
#63
2/4 wheel cornering fiend
Originally posted by MazdaRx7Racer4Life
...its sort of a reliability mod, better to change your dp every 5 years than your turbos every 3.
...its sort of a reliability mod, better to change your dp every 5 years than your turbos every 3.
#64
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The wrapping of the dp will increase its rate of rusting, but it will decrease engine bay temperatures (suposedly dramatically) thus decreasing the chance of overheating and increasing the turbo's probability of survival
#65
2/4 wheel cornering fiend
Originally posted by MazdaRx7Racer4Life
The wrapping of the dp will increase its rate of rusting, but it will decrease engine bay temperatures (suposedly dramatically) thus decreasing the chance of overheating and increasing the turbo's probability of survival
The wrapping of the dp will increase its rate of rusting, but it will decrease engine bay temperatures (suposedly dramatically) thus decreasing the chance of overheating and increasing the turbo's probability of survival
#66
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I think all in all, overheating is bad, if not for the turbos, then for the engine itself, your saving something, why not just go the extra mile and buy the wrap.
#68
94 FD, 69 Datsun Roadster
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I think he's referring to excess heat in the engine compartment. Wrapping the dp can reduce radiant heat therefore reducing the underhood temperatures. All the stuff (wiring, rubber, turbos, etc) will potentially have a longer life as a result. Or are you just yanking him, Kento?
#69
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Wrapping DP and exhaust components is a good idea - it increases post-combustion scavenging.
But I also think it results in greater demands on the exhaust materials - hence the reduced life. Makes sense - no such thing as a free lunch.
But I also think it results in greater demands on the exhaust materials - hence the reduced life. Makes sense - no such thing as a free lunch.
#70
Import Connoisseur
So the Jet-hot is considered the better option over the wrap? So a mild steel downpipe with a jet-hot coating is the best? Someone posted they could touch a a coated downpipe after a hard run is this true??!?!
#71
Originally posted by MazdaRx7Racer4Life
The wrapping of the dp will increase its rate of rusting, but it will decrease engine bay temperatures (suposedly dramatically) thus decreasing the chance of overheating and increasing the turbo's probability of survival
The wrapping of the dp will increase its rate of rusting, but it will decrease engine bay temperatures (suposedly dramatically) thus decreasing the chance of overheating and increasing the turbo's probability of survival
#72
~17 MPG
iTrader: (2)
FYI, I contacted Jet-Hot today, they want $20/foot to coat the downpipe, so that should be about $60. Return shipping is ~$20 also.
For comparison, Pegasus Racing sells a 50' roll of 2" wide x 1/16" thick header wrap for for $50.00, and claims one roll is enough to wrap one set of 4-cylinder headers. (Part No. 1830, www.pegasusautoracing.com )
-scott-
For comparison, Pegasus Racing sells a 50' roll of 2" wide x 1/16" thick header wrap for for $50.00, and claims one roll is enough to wrap one set of 4-cylinder headers. (Part No. 1830, www.pegasusautoracing.com )
-scott-
#73
Rotary Enthusiast
Seems like ther are two different issues here. As far as underhood temps. wrap the down pipe. As far as turbo efficiancy,I'm no thermodynamics professor but it seems like after you send hot expanded exhaust gas to the turbine wheel, you would want to expend it out as fast as possible, with as little resistance as possible.Since cold air is denser than warm air, would'nt it make sense that you wrap the entire exhaust after the turbo. Also, jet-hot is a real catchy name but what is the r value of that stuff