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Old 22 July 2016, 09:30 AM
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SmurfyBhoy
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Default Reducing Underbonnet Temps.

I am trying to lower my in bay temps as i have an RCM cone in there.

Parts I am trying to source at the moment are,

Blobeye STI Foglamp cover with intake duct moulded on with ducting too in same diameter to guide up past FMIC pipes in wing and int bay,
Would need to be in Blue !

Blobeye STI Headlamp Intake

Decent Heat shield to go round my SC42 Turbo,
Old 22 July 2016, 10:14 AM
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Originally Posted by SmurfyBhoy
I am trying to lower my in bay temps as i have an RCM cone in there.

Parts I am trying to source at the moment are,

Blobeye STI Foglamp cover with intake duct moulded on with ducting too in same diameter to guide up past FMIC pipes in wing and int bay,
Would need to be in Blue !

Blobeye STI Headlamp Intake

Decent Heat shield to go round my SC42 Turbo,

Are you still on a TMIC? With a FMIC, unless you've suffered with elevated under bonnet temps, I wouldn't bother with all that. With the under-engine cover removed (and the bonnet scoop still in place) there's masses of cold air running through.

I've got a cold air intake in the front bumper, focussed on the cone, but the late JGM thought it might do more harm than good unless it was set well back from the cone.
Old 22 July 2016, 10:19 AM
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Originally Posted by Paben
Are you still on a TMIC? With a FMIC, unless you've suffered with elevated under bonnet temps, I wouldn't bother with all that. With the under-engine cover removed (and the bonnet scoop still in place) there's masses of cold air running through.

I've got a cold air intake in the front bumper, focussed on the cone, but the late JGM thought it might do more harm than good unless it was set well back from the cone.
Interesting,

I thought you could never be too cool as far as intake temps go,

I have a frount mount yes,

Just feel it could be better managed,
Old 22 July 2016, 10:46 AM
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I'm sure there'll be others on here who will say I'm talking rubbish, but the late Harvey Smith said much the same as JGM so I just took it as gospel.
Old 22 July 2016, 10:50 AM
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I know Harvey said removing the plate from the side vent, caused a heat spot and that fitting a bonnet vent did much the same. Not read anything about the intakes though
Old 22 July 2016, 10:52 AM
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Yea im happy to listen to all advice,

Just want whats best for performance,

Don't like the idea of in wing cold air intakes
Old 22 July 2016, 10:55 AM
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basics would be

space the header tank of the inlet manifold

turbo blanket

wrap the intercooler pipes

wrap the mainfold

if you want to go extra you could put spacers on your inlet manifold to stop heat transfer from the block
Old 22 July 2016, 10:56 AM
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Originally Posted by banny sti
basics would be

space the header tank of the inlet manifold

turbo blanket

wrap the intercooler pipes

wrap the mainfold

if you want to go extra you could put spacers on your inlet manifold to stop heat transfer from the block
I have just got a Perrin Jacket from on here,

I dont have a heat shield tho around the turbo,

Would you use the Gold reflective stuff for intercooler pipes or Exhaust wrap ? Or both ??
Old 22 July 2016, 11:00 AM
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Originally Posted by SmurfyBhoy
I have just got a Perrin Jacket from on here,

I dont have a heat shield tho around the turbo,

Would you use the Gold reflective stuff for intercooler pipes or Exhaust wrap ? Or both ??
Blanket on its own will be fine, its all I run on mine it does a great job

Yep the gold stuff be just fine, heat wrap in my opinion is pointless as its used to keep heat in not out
Old 22 July 2016, 11:03 AM
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Originally Posted by banny sti
Blanket on its own will be fine, its all I run on mine it does a great job

Yep the gold stuff be just fine, heat wrap in my opinion is pointless as its used to keep heat in not out
Makes sense,

I also havent wrapped my headers as i thought it just makes em crack ?

GTSpec i have.
Old 22 July 2016, 11:06 AM
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Originally Posted by SmurfyBhoy
Makes sense,

I also havent wrapped my headers as i thought it just makes em crack ?

GTSpec i have.
I have time for JGlanzaV but he is a little stubborn in his views, you will be fine to wrap the headers they wont crack the first time you come on boost . Yes eventually they may crack but they will do that regardless of wrap or not
Old 22 July 2016, 11:10 AM
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Yea, can say that twice haha

Cheers guys
Old 22 July 2016, 12:25 PM
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Originally Posted by banny sti
I have time for JGlanzaV but he is a little stubborn in his views, you will be fine to wrap the headers they wont crack the first time you come on boost . Yes eventually they may crack but they will do that regardless of wrap or not
You sound just like my missus
Old 22 July 2016, 12:31 PM
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I got my fog cover intakes from kev fawcett on here. Not sure if he has any left. I just bought some 3" flexi tube to run up the side of the front mount next to the filter


Old 22 July 2016, 12:40 PM
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I've got RCM Inlet spacers, turbo blanket and recently re wrapped my headers...now I have a bit of a theory on wrapped headers depending on how it been done...Most of the cracked sets I've seen have been double wrapped as in both pipes wrapped together which is ok but a bit lazy IMO as it

still leaves two parts inside the wrap unprotected, most of the cracks I've seen are in this area?
I wrapped mine individually and didn't do the flanges either...fingers crossed
Old 22 July 2016, 01:10 PM
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Originally Posted by imprezagaz
I got my fog cover intakes from kev fawcett on here. Not sure if he has any left. I just bought some 3" flexi tube to run up the side of the front mount next to the filter


They look great but i think they may clash with my intercooler pipe work,

Not sure tho, it's drivers side i want mainly

Old 22 July 2016, 01:11 PM
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Originally Posted by The Pink Ninja
I've got RCM Inlet spacers, turbo blanket and recently re wrapped my headers...now I have a bit of a theory on wrapped headers depending on how it been done...Most of the cracked sets I've seen have been double wrapped as in both pipes wrapped together which is ok but a bit lazy IMO as it

still leaves two parts inside the wrap unprotected, most of the cracks I've seen are in this area?
I wrapped mine individually and didn't do the flanges either...fingers crossed
Whats the logic behind inlet spacers ?

Thought they were more a gimmick,

I would possibly fit if i had manifold off for a reason, but is it worth changing for thermal gaskets alone ??

Car looks mint underneath with those braces etc.
Old 22 July 2016, 01:37 PM
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My old setup was a WRX foglight surround, tubing up to the RCM intake, which was shielded from the engine by something I made myself.

Intake temperatures were never more than a couple of degrees above ambient.
Old 22 July 2016, 01:46 PM
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Yours looks the same route as mine and it fitted okay
Old 22 July 2016, 02:07 PM
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Originally Posted by imprezagaz


Yours looks the same route as mine and it fitted okay
Nice is that intercooler sprayed black ?

Or like that when bought ?
Old 22 July 2016, 02:32 PM
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I wonder how wrapping the intercooler pipes helps? The cold side pipe (on my car) sits directly in the air flow from the bonnet scoop and being polished aluminium probably dissipates heat better than most wrappings.
Old 22 July 2016, 02:32 PM
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Sprayed black and pipes powder coated crinkle black
Old 22 July 2016, 02:33 PM
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The front hole is the ideal place to run a cold feed . Either making a bespoke fitment making use of the whole diameter or just running a basic pipe for cheapness & ease / as stated wrapping manifolds individually , inlet spacers etc etc , motorcycle fans attached to bulkhead & off side strut tower aid in recirculating hot air around the bay but unless you have a bonnet vent you will not gain anything as the scoop will hinder its performance / hot air rises so it ideally needs a hole not a slit etc

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Old 22 July 2016, 02:58 PM
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Originally Posted by jazzyjembreaze
The front hole is the ideal place to run a cold feed . Either making a bespoke fitment making use of the whole diameter or just running a basic pipe for cheapness & ease / as stated wrapping manifolds individually , inlet spacers etc etc , motorcycle fans attached to bulkhead & off side strut tower aid in recirculating hot air around the bay but unless you have a bonnet vent you will not gain anything as the scoop will hinder its performance / hot air rises so it ideally needs a hole not a slit etc



Is there anything feeding that red tube in the pic or is it one end in wing one end at cone ?

Also have u blocked off the underside of your bonnet scoop ?
Old 22 July 2016, 03:26 PM
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You haven't read my post correct
The red tube is FMIC pipe work ( nothing to do with induction ) the hole in front is where the induction feed is situated : the pic is for ref

I don't have a bonnet scoop
Old 22 July 2016, 03:37 PM
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Ah i get it now,

Can you explain why a vent is better than a scoop ?
Old 22 July 2016, 03:50 PM
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Well having a vent is just that / ventilation , besides I don't want forced pressurised air entering through a scoop as it tampers with induction flow / here I found this for you ( read it entirely ) hope you get sorted
http://ateupwithmotor.com/terms-tech...s/hood-scoops/
Old 25 July 2016, 12:15 PM
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What blanket did you go for on the sc42?

Also previous owner started wrapping the intercooler pipes with gold reflective tape,it looks like cheap poor quality stuff.
Would this be ok and 10 meters be enough?

Edit wrong link:
http://www.thermalvelocity.co.uk/Hea...ape/p-150-474/

Last edited by ossett2k2; 25 July 2016 at 12:17 PM.
Old 25 July 2016, 01:20 PM
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Originally Posted by ossett2k2
What blanket did you go for on the sc42?

Also previous owner started wrapping the intercooler pipes with gold reflective tape,it looks like cheap poor quality stuff.
Would this be ok and 10 meters be enough?

Edit wrong link:
http://www.thermalvelocity.co.uk/Hea...ape/p-150-474/
I have a perrin one coming, they used to be sold by Scoobyclinic so guessing it should fit,

That Thermal Velocity stuff is pretty good i got exhaust heatwrap from there.
Old 25 July 2016, 01:23 PM
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Originally Posted by jazzyjembreaze
Well having a vent is just that / ventilation , besides I don't want forced pressurised air entering through a scoop as it tampers with induction flow / here I found this for you ( read it entirely ) hope you get sorted
http://ateupwithmotor.com/terms-tech...s/hood-scoops/
Whats your thoughts on this compared to scoop ??







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