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 Wrapping my downpipe

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Jeremy
Amateur


Name : Jeremy
Age : 33
Location : Hattiesburg, MS
Joined : 2008-03-25
Post Count : 48
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Wrapping my downpipe Empty
PostSubject: Wrapping my downpipe   Wrapping my downpipe EmptyTue Jul 15, 2008 11:56 pm

I am seriously trying to lower my underhood temperatures on my car(95' S/C). I think that the excess heat is doing damage to my engine, so heres wat i have done so far; Sealed my air box, removed the SC plastic cover, installed a Hayden Trans cooler, and wired my auxillary fan to a toggle switch- i hate runnig the AC just to have it on. I have also been pondering about the idea of wrapping my downpipe- more like up and over pipe- with headder wrap. Since its like 3 inches from the throttle body, i thought that insulating it from the very hot exhaust temps coming off the downpipe might help lower the intake charge temps. What do you guys think about this? I think its at least worth discussing with you guys and seeing if anyone else has tried it already.
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Mr.Riviera
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Mr.Riviera

Name : Matthew
Age : 33
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Wrapping my downpipe Empty
PostSubject: Re: Wrapping my downpipe   Wrapping my downpipe EmptyWed Jul 16, 2008 12:52 am

do you have a 180* t-stat? what temps are you seeing now? when's the last time the coolant was changed? and have you added anything to it?

i think you are thinking of the crossover that sits below the throttle body. the downpipe goes from the collector at the rear of the engine to the catalytic converter.
personally i dont think wrapping it would help that much. you may want to look into that reflectix wrap for intakes though. that should reduce intake temps some. zzp sells a bolt on heat shield for the crossover but it looks to be a waste of $50 IMO. (just a plate with 2 holes and a 90* bend lol )

_________________
1996 with 254k miles, L32 4" FWI -> ported N* -> Ported Gen V w/3.0" Pulley, Stage 3 Phenolic I/C, ZZP FMHE, 1.84 RR, Headers and 3" pipe to mufflers, F-body brakes, and lowered on Eibachs. -RIP
AMG C400 White on black -daily
Wrapping my downpipe Dsc_0110
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deekster_caddy
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Name : Derek
Age : 47
Location : Reading, MA
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Wrapping my downpipe Empty
PostSubject: Re: Wrapping my downpipe   Wrapping my downpipe EmptyWed Jul 16, 2008 8:06 am

Why do you think it's damaging? More info about your car please - is it N/A or S/C? Series I or II? Headers? Are your fans working properly? If not there will be a lot of underhood heat... What are your engine temps?

Wrapping the crossover will help a little bit. There was a heat shield on mine from the factory. So will wrapping the front manifold if you are feeling very ambitious. (it's not easy to wrap)
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AA
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Name : Aaron
Age : 42
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Wrapping my downpipe Empty
PostSubject: Re: Wrapping my downpipe   Wrapping my downpipe EmptyWed Jul 16, 2008 8:26 am

Quote :
I am seriously trying to lower my underhood temperatures on my car(95' S/C). I think that the excess heat is doing damage to my engine

I agree with deekster, the heat shouldn't be damaging. Engines like a little heat to operate comfortably. How hot is your engine running?

Lowering engine bay temps is always good, though. Try removing the rubber seal at the cowl of your hood (near windshield). Run a 180º t-stat. Go ahead and wrap the exhaust headers, crossover, and downpipe. All of this should make a difference.

_________________
'98 SC Riviera • 281k miles • 298 HP/370 TQ • 0-60: 5.79s • ET: 13.97 @ 99.28 • 4087 lb • 20.1 avg MPG • Nelson Ledges Lap: 1:30
3.4" pulley • AL104 plugs • 180º t-stat • FWI w/K&N • 1.9:1 rockers • OR pushrods • LS6 valve springs • SLP headers • ZZP fuel rails
KYB GR2 struts • MaxAir shocks • Addco sway bars • UMI bushings • GM STB • Enkei 18" EV5s w/ Dunlop DZ101s • F-body calipers
EBC bluestuff/Hawk HP plus • SS lines • Brembo slotted discs • DHP tuned • Aeroforce • Hidden Hitch

^^^ SOLD ^^^ frown

'05 GTO • 85k miles • 0-60: 4.8s • 16.9 avg MPG • Nelson Ledges Lap: 1:26
Because fun


'70 Olds Ninety-Eight Holiday Coupe • 116k miles • 455 Rocket V8
Because cool


'95 Celica • 152k miles • 0-60: yes
Because free
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rivwilly107
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rivwilly107

Name : Jim
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Wrapping my downpipe Empty
PostSubject: Re: Wrapping my downpipe   Wrapping my downpipe EmptyWed Jul 16, 2008 1:11 pm

Wouldn't wrapping the front manifold be of greater benefit for heat removal ? I thought about wrapping mine I have a ZZP SS P-LOG.Not ceramic coated though.I don't think you can wrap the ceramic( wouldn't need to anyway ) because it will crack I think? The SS P-log should be fine wrapping, same with the stock Cast Iron one.
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Chicken
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Chicken

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Wrapping my downpipe Empty
PostSubject: Re: Wrapping my downpipe   Wrapping my downpipe EmptyWed Jul 16, 2008 1:47 pm

I read that wrapping any exhaust components hold the heat in and actually do more damage then good

http://www.centuryperformance.com/exhaust-header-heat-wraps-do-not-use-spg-138.html
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AA
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PostSubject: Re: Wrapping my downpipe   Wrapping my downpipe EmptyWed Jul 16, 2008 2:11 pm

^^^ That's a good advertisement for ceramic coating, but it's not the only view on the subject. Here's what Thermo-Tech says:

http://www.thermotec.com/faqs-about-our-products.html

I have to think that cheap mild steel is going to corrode anyway, and faster under extreme heat. Some stainless cannot hold up to the extreme heat, either. I've used Thermo-Tec wrap on my braided SS flex tube for almost 3 years now with not a single issues at all.

If I were going to use wrap (I don't because of the looks of it), I'd go with ceramic coated SS headers, wrapping everything from the primaries to the cat converter.

_________________
'98 SC Riviera • 281k miles • 298 HP/370 TQ • 0-60: 5.79s • ET: 13.97 @ 99.28 • 4087 lb • 20.1 avg MPG • Nelson Ledges Lap: 1:30
3.4" pulley • AL104 plugs • 180º t-stat • FWI w/K&N • 1.9:1 rockers • OR pushrods • LS6 valve springs • SLP headers • ZZP fuel rails
KYB GR2 struts • MaxAir shocks • Addco sway bars • UMI bushings • GM STB • Enkei 18" EV5s w/ Dunlop DZ101s • F-body calipers
EBC bluestuff/Hawk HP plus • SS lines • Brembo slotted discs • DHP tuned • Aeroforce • Hidden Hitch

^^^ SOLD ^^^ frown

'05 GTO • 85k miles • 0-60: 4.8s • 16.9 avg MPG • Nelson Ledges Lap: 1:26
Because fun


'70 Olds Ninety-Eight Holiday Coupe • 116k miles • 455 Rocket V8
Because cool


'95 Celica • 152k miles • 0-60: yes
Because free
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http://www.cardomain.com/ride/657082/4
Jeremy
Amateur


Name : Jeremy
Age : 33
Location : Hattiesburg, MS
Joined : 2008-03-25
Post Count : 48
Merit : 0

Wrapping my downpipe Empty
PostSubject: Re: Wrapping my downpipe   Wrapping my downpipe EmptyThu Jul 17, 2008 1:09 am

Hey sorry dont have much access to the net these days but i get on when i can... Na it's a 1995 with the supecharger and i have done the 104's with the 180 thermostat and a 2.5'' pulley and a larger idler pulley- cant remember its exact dimensions. Also did a cat delete (MISSISSIPPI) and flowmasters with a glasspack up front acting as a reasonator- trust me it was very necessary; straight flows with no converter made my riv sound like a boat motor running out of the water. So far so well though everything seems to be getting along with the stock PCM. I need to have it reprogrammed pretty soon, and i also nabbed a set of LS1 injectors that i hope will work with the Walbro 255 GPH fuel pump i got as well. I think that fuel is my biggest problem right now. It just feels like im getting too lean of the line, or it could just be the KR kicking in. Sealing the intake definately made a big difference in how my car is running. As far as the wraping of the crossover pipe i think i gonna leave that one alone- plus u right it will look like shit. If anyone has any other ideas of wat i can do to this dang series one, please feel free to chime in.
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