View Full Version : PTFE Inlet Manifold Gasket
I saw on another car forum, a group buy for these, and it said that they gave a good increase in bhp by keeping the inlet manifold cooler due to the heat not radiating through to the inlet manifold.
Would this work on the clio? As i know it gets nice and hot inside the bay.
yes, we have some being made at the moment, but the problem is that you have to alter some of the fixings holes and slot them since you push the manifold further out.
How exactly does it work then?
As above, how does it work? what are the gains and how much is it going to cost for parts and fitted?
Laine_16v
31-10-2006, 13:02
Im guessing the PTFE is a very good insulator.
the normal inlet manifold gasket is metal which conducts the heat well and heats up the inlet manifold and therefore heats up the air before entering the engine.
As the PTFE doesnt conduct very well, the inlet manifold stays cooler, air stays cooler, cooler air enters the engine.
Thats how i imagine it to work anyway.
Yeah that was the blurb that i read about it.
Seems a cheapish mod to do for abit of gain.
quite correct, the ol honda boys have been doing it for ages and they see repeatedly large gains, but they do have alot more HP to begin with.
I've seen carb setups with 1" thick spacers that knock up torque and bhp a silly amount for just temp reduction.
But it depends since the rad sits right infront of it anyway.
Were just trying out a few, so they wont be expensive and we'll ship them out for people to fit, since labour costs for fitting a gasket will be high due to time taken, not very economical unless you are doing it yourself etc.
Cool i would be interested in one when you sell some.
Would be fitting mine myself anyway.
How thick do you reckon it has to be,1mm/2mm thick,we use sheet ptfe in work on the lasers,very good at deflecting heat,if it can stand a laser imsure an exhaust manifold is simple?
Maybe be able to make a few up aswell
i'd be interested aswell ben, let me know when you have some eh?
Im interested, but is it a radiator off jobbie to get the inlet manifold off?
Mate it's a Valver....of cousre it's going to involve removing everything, lots of swearing and cut hands.
inlet fanimolds are a rate pain in the arris to get off,so many other bits to remove first like alternator bracket for a start
Defo interested
Shoudl be able to get away with taking the top of the slam anal off and pulling the top of the rad forwards
should be easier for me, as I don't have any of the supporting brackets on my inlet manifold, just the retaining nuts to the head.
should be easier for me, as I don't have any of the supporting brackets on my inlet manifold, just the retaining nuts to the head.
Nor me :twisted:
Defo interested
Shoudl be able to get away with taking the top of the slam anal off and pulling the top of the rad forwards
slam anal?
you dirty bugger
Defo interested
Shoudl be able to get away with taking the top of the slam anal off and pulling the top of the rad forwards
slam anal?
you dirty bugger
Its a porno dont' you know :lol:
david932
21-11-2006, 21:24
The inlet's water heated isn't it? surely just unplumbing them should give good gains 8) obviously cold starting would be affected but
doe's any1 really care :?:
Laine_16v
21-11-2006, 21:34
No water runs through the inlet manifold?
david932
21-11-2006, 21:37
ah! well thats that idea blown :roll:
i jus read in the haynes that it does ..my bad!
the normal inlet manifold gasket is metal which conducts the heat well and heats up the inlet manifold and therefore heats up the air before entering the engine.
its not, its jus normal gasket material, ive got one from Renault under my bed, its like a black paper/felt/card material
Laine_16v
14-12-2006, 23:35
My bad, but clerly PTFE is a superior heat insulating material comapred to the standard.
Made one up in work lastnight,got to wait until my inlet arrives to fit it,trial and error really,its about 2mm thick atm,dont know if thats going to be thick enough yet.
http://i6.photobucket.com/albums/y226/bluedragon101/gas1.jpg
ben r how thick do you recommend
So where can you get these from? May aswell get one while my engines out.
I made that one from sheet ptfe
jwarren2k2
18-01-2007, 19:40
i can see these being a bit of a winner!
you could be onto a little earner here snowman!
david932
18-01-2007, 19:56
:clap: i'll take one off u aswell :wink:
surely it wouldnt be hard to just buy a sheet and cut your own
have a go, lets see how it turns out.. I don't think my scissors are up to it :lol: Ps have you sent my starter :)
Snowman, if you CNC those then i'll buy a batch since the guy i had doing mine has become my mechanic so no longer does them lol.
2mm-3mm is fine
come on then snowman get cncing i,ll have two
david932
19-01-2007, 02:30
2 for me aswel please.
jwarren2k2
19-01-2007, 09:15
what did I say!! :wink:
i'll have one, too please, although it may have to be for a megane head in which case i'd send you an original, i shall keep you posted! :)
lol,well ive got a source of the sheet ptfe now,yes if you wanted to you could do your own.
I dont know how much i could flog them for really,how much is a standard Renault jobbie?
Can cut one for a meg aswell once ive got original outline.
One for me as well please
http://cgi.ebay.co.uk/2mm-PTFE-Sheet-300-x-100-mm-TEFLON_W0QQitemZ170071659129QQihZ007QQcategoryZ262 58QQrdZ1QQssPageNameZWD1VQQcmdZViewItem
That could make a few :P
One the dimensions are on the CNC machine is it just a matter of pressing a button?
The Payen effort I have here was £5.18
bass_direct
19-01-2007, 12:18
i'll take one!
The ptfe thats on ebay isnt large enough,the gasket is roughly about 375mm long,ill try and get a program made up,i cut the one i did for myself with a scalpel tho,they only take about 30mins with a steady hand but if the demand is high ill get a prog made
Surely the thicker the better? Wouldn't it be better to go for something slightly thicker, or would you not see any temp transfer difference?
yeah mate let us know what happens!
problem is go to thick and the bolt holes wont line up on all the supports etc
david932
20-01-2007, 14:13
ben r which type of ptfe is the best then?
i've looked at some site's and theres various grades including glass filled and carbon filled
PLain old is fine.
The fibre filled items tend to wear cutters out quite fast and make a horrid mess.
Imperial_16v
20-01-2007, 21:46
I'd take one as long as the price is right. 8)
Sounds like a good little mod to do for some extra ponies!
if someone can get me one of these for next week, i'll paypal em a fair amount it's just that my engine should be going in next week so might as well do it while the thing is in bits! :D
david932
20-01-2007, 22:57
cheers ben, mite give the scalpel/stanley method a try. these sheets come in any thickness from 0.5mm to 20mm
ben, what do you think is a good size to go for? or what thickness do these honda boys use?
Imperial_16v
21-01-2007, 12:13
cheers ben, mite give the scalpel/stanley method a try. these sheets come in any thickness from 0.5mm to 20mm
ben, what do you think is a good size to go for? or what thickness do these honda boys use?
I think he mentioned 2mm. :)
david932
29-01-2007, 19:47
has anybody fitted one of these yet?
problem is go to thick and the bolt holes wont line up on all the supports etc
Not a problem... Use washers to space out as required (tip from Ben R himself).
Or you could do away with the supports. Save a tiny bit of weight and save yourself some hassle when doing the alternator/manifold in the future.
MatBrown
30-01-2007, 00:26
dont think so
What you playing at then? :wink:
Mat.
I've got my new inlet to go on,
Wouldn't mind one of these either, if they actually work that is.
dont think so
What you playing at then? :wink:
Mat.
lol,my inlet isnt ready to go on yet,and theyre a rate pain aswell,bass_direct and lowe are fitting 1 to theirs
any one sorted these yet then
right. made myself one of these today. when fitting would you just use the PTFE gasket and sealant or sandwich it between two standard gaskets.
david932
26-02-2007, 00:55
i was speaking to a chap at the weekend who's recently fitted one to a 205, he said he just used the ptfe as it seemed soft enough. he also said it worked well with a noticeable increase in torque :D
cheers mate. yes bought a bit of 3mm and hand cut it one night. seams like it will be worth the effort then.
david932
26-02-2007, 01:16
where did you source your ptfe from? cheapest i've found is £25 for a 40mmx40mm sheet @2mm thick
bought a 400mm x 100mm piece from davies industrial plastics. price was 9.00 quid postage was 10.50 but came the next day. not sure if the postage is a flat rate across the board. tel no 01239 552836.
I've used Davies industrial before for catch tank piping... good quality stuff :)
Would also be interested if someone can do a batch cnc run :) mk1 1.8 16v of course :roll:
Matthew
Imperial_16v
26-02-2007, 12:48
Yup, I'm still interested if someone could do a batch of these. :)
david932
23-03-2007, 00:11
snowman, easy money to be made here.. get on the cnc
:doit:
i still want one 4mm if you could
david932
23-03-2007, 00:13
aslo have you seen gdi are selling them for the 172/182 but not williams. if i had access to cnc machines i know what i would be doing now before anyone else doe's. think of the money :)
got one fitted on the turbo.
Imperial_16v
12-04-2007, 19:15
So has this grinded to a halt then peeps?
:( :( :(
yes but easy to make one yourself.
Imperial_16v
12-04-2007, 22:39
yes but easy to make one yourself.
Well I thought the whole point of this was to get someone to make a batch and get a good 'ol group buy on the go. Someone could make this a nice little earner. :) ;)
and me but got bored waiting so cut one out of 3mm ptfe with a scalpel by hand.
Imperial_16v
13-04-2007, 10:24
and me but got bored waiting so cut one out of 3mm ptfe with a scalpel by hand.
ah nice one. :D
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