DSMTalk Forums: Mitsubishi Eclipse, Plymouth Laser, and Eagle Talon Forum banner

Intake Manifold Phenolic Spacers.

3.8K views 28 replies 13 participants last post by  joereitman  
#1 ·
Hello.

A local Machine Shop made about 36 of these for me (that was last year, sold out). My intention was to take Intake Manifold Temp reading using a Pyrometer but was unable due to a Deployment to the Middle East...

Only testing I did was to put my hand on the Intake Manifold after having done a few Laps. I was actually able to do it without causing any disconfort.

I would like if any of you would have any feedback to give me about these Spacers.

They were made out of 3/16" thick Phenolic material. I could have some more made if their is enough interest.

Ghislain.
 
#2 ·
Its a good idea I'm not ready to get that technical yet. need to get the thing running before I worry about intake temp.

Good luck with this hope it sells.

Comeing frome a raceing backround I know the differance this can make and felt your thread deserved a bump.
Good luck

G
 
#6 ·
Tx for the bump.

I agree that it's a mod that will not yeild HP but will alloy you to sustain those HP numbers through out the day at the 1/4 miles or doing road circuit.

I should be doing a Batch soon as I'm still getting lots of interest.

I'll be droping you guys a line in the next few days.

Ghislain. :D
 
#7 ·
Would it be similar to the one 122 performance sells? Here is a quote from their site- "Congratulations to Curt Brown for running a 9.8 at 145mph at the IDRC East Coast Finals at Maple Grove! Curt is using one of our 3" 02 housings and a phenolic intake manifold spacer." I have always liked the idea of phenolics. Think LS1 intake...

Thanks

Joe
 
#8 ·
I would take one also. If they are for 2nd gen. How about a throttle body one also? I would love to see what effect it would do to the power curve.
 
#9 ·
The main effect is keeping the air coming into the TB cooler by minimizing heat transfer from the engie.

Joe
 
#11 ·
would you have to mod the water line to the TB to get the full effect. I would think any gains made by this would be canceled out after the car warms up and the coolent warms the TB.

Also does anyone have some links to a dyno graph of similar phenolic spacer mod. i would be most concerned with the loss on the low end. I've always heard that longer intake runners means more top end but less low end. Of course that depends on how thick the spacers are it might now be a concern.
 
#12 ·
I've always heard that longer intake runners means more top end but less low end

You have it backwards. Long curved intake runners equal more low-end. Short, straight intake runners equal more top end flow.
 
#13 ·
"would you have to mod the water line to the TB to get the full effect. I would think any gains made by this would be canceled out after the car warms up and the coolent warms the TB."

Absolutely correct, imho.

BTW, the spacers are generally only 1/4" or so.

Joe
 
#14 ·
Hello all.

These Phenolic Spacers are made out 3/16" thick material so they would not increase the Runner leight by much. The Phenolic Material is resistant to Oil or other potential contaminants. It is also resistant to Heat cycling.

A Throttle Body Spacer would not be required if one would use the Intake to Head Spacer. Most Heat is transfered from the Cylinder Head to the Intake Manifold. The TB Coolant Lines can be left alone or can be removed, that one is up to you.

The instalation is pretty easy. You just need to elongate the holes on the Intake Manifold Lower Brace and you'll also need to elongate two Holes on the "Wishbone" Brace" at the TB. The two Intake Manifold outer Studs are long enough and the Bolts are also long enough but you could use some longer ones. An Inatke Manifold Gasket should be used between the Head and the Spacer and High Heat RTV between the Manifold and the Spacer. Some have used two Gaskets with excellents results. The Spacer can be reused as long as you are carefull removing it. That is about it.

I should be giving an order to produce next week and the Spacers should be ready to ship in two weeks from now.

I don't do this on a comercial base but as a way to help fellow DSMer. Tx for the space.

Ghislan.
 
#15 ·
I am looking for the tb to in crease the plemumn volume. There was a comment about runner lenght. Here is how I was explained it. Shorter runner lenght increases troque on the lower end and reduces the hp on the upper end. Better throtle response. Longer runner length incvreases Hp on the upper side while reducing the torque on the lower end. But it is not really an increase. By moving the runeer lenght up and down you are playing with the power curve. the trick is playing with the numjber to get it to a happy median. Horse power and torque are porpationally linked. I wish now that I would haved paid more attion in college physics. But any way any reduction in temp will increase hp no matter how small there will be an increase. Cooller dense air is always good.

If I am wrong plese feel free to correct me.
Geo
 
#16 ·
Here are some numbers that a guy got from a V6 mazda after he installed phenolic intake spacers. As you can see it makes a BIG difference in manifold heat soak. All the intercooling and what not that we do, we would be STUPID to not seperate the manifold from the heat. IMO ?


Image


http://www.outlaw-engineering.com/Installation.htm
 
#17 ·
you want cooler intake? go water injection. when EVERYTHING is hot from heat soak, i can engage the water injection, touch the intake, and within seconds, that sucker is COLD. not cool, COLD. you can feel it cooling down. it is easy to install another switch inside the car to override the hobbs switch and engage the water injection. so, sittin at the lite, i can bring up the revs slightly, and engage the water injection, so when the lite turns green, the intake is REALLY cold.
 
#19 ·
Good links. :)

Both would be best. Plus propane for better distributed A/F mix in the chamber, plus some alky in the H2O. :D

Joe
 
#22 ·
Good link. :)

Joe
 
#25 ·
Please let us know how it works out.

Thanks

Joe
 
#26 ·
That chart almost looks familiar. I think I saw it for the Klo3 the Mazda motor in my old probe. If so I had those Phenolic spacers installed. Mad a slight difference in the mani but not much due to under hood temp being high. That is why I just wraped my exhaust mani this week.