Thermal spacers

[pc]

A guy in Canada selling them here http://cgi.ebay.ca/85-90-Corolla-GTS-4AGE-Intake-Heatshield-Gasket-5-HP_W0QQitemZ280473394426QQihZ018QQcategoryZ33668QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

If I bought 5 or so it should work out to ~$35 each.

group buy anyone?

[JustinSpiderholden]

They're rubbish and don't work anyway.

Steve

Really why?

Show real life examples with hard evidence please to please back up your comments

Else $&#$% off

More to the point , proove that it DOES work.
The theory for carbys is different because you want to keep the fuel cooler to prevent difficult hot starts.
For the average turbo car, the heat in the intake manifold comes from the hot compressed air from the turbos (less than 100% intercooler efficiency).When you're ON boost the intake manifold temp goes up. When you're OFF boost , the intake manifold is cooler.
Reducing any heat soak TO the manifold from the head will make it hotter elsewhere, also the spacer will need port matching very carefully or else instead of only one place to upset airflow due to mismatch, there's 2.
I've had a pair of them on my own car, put them on in 2002, they're in the shed now on a shelf. Rubbish.

Steve

Another post of bullshit with no proof, you talk so much shit with nothing nothing to back it up

Mate you are all talk

[jakesae101]

A guy in Canada selling them here http://cgi.ebay.ca/85-90-Corolla-GTS-4AGE-Intake-Heatshield-Gasket-5-HP_W0QQitemZ280473394426QQihZ018QQcategoryZ33668QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

If I bought 5 or so it should work out to ~$35 each.

group buy anyone?

yep id buy a bigport one

[Crampy]

They're rubbish and don't work anyway.

Steve

Really why?

Show real life examples with hard evidence please to please back up your comments

Else $&#$% off

More to the point , proove that it DOES work.
The theory for carbys is different because you want to keep the fuel cooler to prevent difficult hot starts.
For the average turbo car, the heat in the intake manifold comes from the hot compressed air from the turbos (less than 100% intercooler efficiency).When you're ON boost the intake manifold temp goes up. When you're OFF boost , the intake manifold is cooler.
Reducing any heat soak TO the manifold from the head will make it hotter elsewhere, also the spacer will need port matching very carefully or else instead of only one place to upset airflow due to mismatch, there's 2.
I've had a pair of them on my own car, put them on in 2002, they're in the shed now on a shelf. Rubbish.

Steve

I would hazard a guess that the reason why your ones didn't work was due to having a BHG, which would have caused unusual thermal issues with your motor.


How does that feel?

[Flannelman]

You will find that these plates are not to have a cooler intake manifold so the incoming air is cooler, but to have a cooler fuel supply. Hot fuel is just as good for making power as hot air.
This is the same reason why they are used under carburetors

[sergei]

You will find that these plates are not to have a cooler intake manifold so the incoming air is cooler, but to have a cooler fuel supply. Hot fuel is just as good for making power as hot air.
This is the same reason why they are used under carburetors

Not true, hot fuel is great at increasing efficiency. The reason why they use on carbs is to stop it from vapour lock (where fuel boils inside of the carb and creates an fuel vapour lock preventing carb supplying fuel).

[ChaosAD]

Not sure why, but the '86 1.8l carby corona's (2e maybe?) have the intake and exhaust manifolds bolted together with heatsink fins on the inside.

Isn't hot fuel bad, and the reason for not wanting to choose a fuel pump too large for the application?

[matt dunn]

Isn't hot fuel bad, and the reason for not wanting to choose a fuel pump too large for the application?

Yup, also the reason the toyota WRC corolla's run an water/ice cooler for the fuel.

[iOnic]

Not true, hot fuel is great at increasing efficiency.

So what you're saying is that hot fuel is good?

[ChaosAD]

Helps create good fuel atomization I guess

[slammed_integral]

series 4 and 5 rx7 13b turbo has a 6-8mm one between throttle body and inlet plenum

[Burning Angel]

Not true, hot fuel is great at increasing efficiency.

So what you're saying is that hot fuel is good?

it seems hot fuel is good for atomization and spray penetration speeds and distances in this paper(Relating to GDI but probably still somewhat relevant): http://www.tempe.mi.cnr.it/brunello/papers/draft1901.pdf

they were testing with fuel injector nozzle temps up to 120°C which i imagine would give fuel temps the same.

heres another overview stating reduced droplet size and improved spray patterns with increased fuel temp:

IN: International Symposium on Air Breathing Engines, 8th, Cincinnati, OH, June 14-19, 1987, Proceedings (A87-46176 20-07). New York, American Institute of Aeronautics and Astronautics, 1987, p. 193-199.

The influence of fuel temperature on mean drop size and drop-size distribution is examined for aviation gasoline and diesel oil, using three pressure-swirl simplex nozzles. Spray characteristics are measured over wide ranges of fuel injection pressure and ambient air pressure using a Malvern spray analyzer. Fuel temperatures are varied from -20 C to +50 C. Over this range of temperature, the overall effect of an increase in fuel temperature is to reduce the mean drop size and broaden the distribution of drop sizes in the spray. Generally, it is found that the influence of fuel temperature on mean drop size is far more pronounced for diesel oil than for gasoline. For both fuels the beneficial effect of higher fuel temperatures on atomization quality is sensibly independent of ambient air pressure.

I think the reason why people don't want hot fuel in a fuel injection system is that fuel becomes less dense by ~1% per 15° therefore hot fuel can make you car run lean. This is only a problem if you cant compensate with your ecu, and if its a racecar.
New Link ECU's can compensate for fuel temp but tuning for it would be expensive and only an option if you had big bucks to spend on dynotime(ie Race team)[/quote]

[allencr]

Every one is right!! They are rubbish AND they do work very well!
It's not magic, so don't expect advertising BS to be true or miracles to happen.
[/b]

[steve murch]

They're rubbish and don't work anyway.

Steve

Really why?

Show real life examples with hard evidence please to please back up your comments

Else $&#$% off

More to the point , proove that it DOES work.
The theory for carbys is different because you want to keep the fuel cooler to prevent difficult hot starts.
For the average turbo car, the heat in the intake manifold comes from the hot compressed air from the turbos (less than 100% intercooler efficiency).When you're ON boost the intake manifold temp goes up. When you're OFF boost , the intake manifold is cooler.
Reducing any heat soak TO the manifold from the head will make it hotter elsewhere, also the spacer will need port matching very carefully or else instead of only one place to upset airflow due to mismatch, there's 2.
I've had a pair of them on my own car, put them on in 2002, they're in the shed now on a shelf. Rubbish.

Steve

I would hazard a guess that the reason why your ones didn't work was due to having a BHG, which would have caused unusual thermal issues with your motor.


How does that feel?

ok i dont normally say anything but he has been burnt and has many issues to which he goes on every forum know to man kind bagging anything and everything and fails to ever make any sence, gifted they call it?
anyway they DO work regardless of turbo or non turbo, ive used them for years and you sometimes only get small gains but they can be felt threw the seat to great gains of 10-12hp.
i was making them for gizzmo before he got a cnc to mass produce and he made good money from them.
ill have to dig out the dyno sheets but on a vetec 10hp was average gain, to keep it in perspective you can spend say 60 on a filter giving 5-8hp and for 100 odd you can get the same with a spacer but more important a gain in torgue.
lower temps also help prevent det, and if you have water threw the manifold or throttle body it wouldnt hurt to bypass that for better gains again.
now what do you have to loose?
on the fuel side of things 70deg seems to be good number from testing for both fuel and economy.
theres an article i have somewhere called running on empty which surrounded the honda f1 turbo days, find its great reading based on fuel against temps, maybe magnet1 wrote it yea right

[Crampy]

10-12hp nice
Proof enough for me.

[FLAWLES]

http://www.hondata.com/heatshieldgasket.html#Details

thats a good fast read, 3% power increase is dam good for the money, ever car would be different, but still the facts are there

also

Fact: For every 3.3 °C (5° F) rise in intake temperature, air density drops 1%. The hotter the air, the less fuel the computer injects to compensate for reduced oxygen. HondaLogger datalogging software has enabled us to measure intake air temperature under varied driving conditions.

was very interesting

now i wonder if they make them for a 1jzgte lol, i would happily invest in one

[steve murch]

http://www.hondata.com/heatshieldgasket.html#Details

thats a good fast read, 3% power increase is dam good for the money, ever car would be different, but still the facts are there

also

Fact: For every 3.3 °C (5° F) rise in intake temperature, air density drops 1%. The hotter the air, the less fuel the computer injects to compensate for reduced oxygen. HondaLogger datalogging software has enabled us to measure intake air temperature under varied driving conditions.

was very interesting

now i wonder if they make them for a 1jzgte lol, i would happily invest in one

poor old mr magnet1 he might just be wrong for a change,actually most times hes wrong lolol'
but please dont meantion data logging he'll go on for ever about it

[tsoob]

<3 magnit's posts they give this forum so much life.

[frost]

i think magn1t posts are rather helpful.

if he didnt post then people like steve murch and links from other users would not be giving us such useful information.

[GOLDAE86]

The material we use on the NZV8 taxi touring cars is called "phenolic". We use it between the carby and the inlet manifold to reduce the heat hitting the carb. Some teams only use enuf to make a gasket shape, but we try to use as much as we can to cover the inlet manifold as this does help with heat reduction. Just my 2 cents worth. Every little bit helps so we believe its effective. Cheers