phenolic spacer?
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Old August 2nd, 2011, 03:18 AM   #1
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phenolic spacer?


so i'm buying a ported gt40 upper and lower intake off a guy for 200 bucks and he said he's gonna throw in a phenolic spacer. what the hell is that? is that some kind of performance part? and does it go between the upper and lower or the lower to head?
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Old August 2nd, 2011, 03:19 AM   #2
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it goes between the upper and lower manifold and is meant to reduce the amount of heat transfered from the lower to the upper manifold so in effect keeping air cooler giving you better burn.
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Old August 2nd, 2011, 03:22 AM   #3
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yea i read a little about it on yahoo. so if i use that, do i need a gasket inbetween there or the spacer take place of the gasket? and does this thing actually work?
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Old August 2nd, 2011, 03:29 AM   #4
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yup you need an extra gasket and depending on the size of it longer bolts... if its only a small one you should be fine with the stock bolts. and yes it does work...

you may need to touch your timing a micron or so but it shouldnt really affect it... would only affect it if you have something like a 1" spacer because air will take longer to travel down the manifolds to hit the fuel and burn...
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Old August 2nd, 2011, 03:41 AM   #5
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ah, nice thanks for the info!
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Old August 2nd, 2011, 07:31 AM   #6
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Originally Posted by bennyjet846 View Post
ah, nice thanks for the info!
no problem
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Old August 2nd, 2011, 02:40 PM   #7
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To me it's a waste of money. The temps under your hood will heat soak everything so having a spacer for the purpose of cooler air is crap. They do come in handy for when you need to clear the upper intake and cold air intake tubbing from tall valve covers. I think that's the reason they were invented for in the first place. I had to use a 3/4" spacer for my setup once because of my tall valve covers and had to buy extra gaskets and longer screws. More money to spend just cause at the time of my engine build I had tall covers. Years later I replace the tall covers with regular size chrome ones and removed the spacer. Should've done that in the first place and saved money. Not even gonna get into the need of having a taller hood too when I added the spacer. Even more money.
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Old August 2nd, 2011, 02:41 PM   #8
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Makes removal of the valve covers easy. Also dont forget hood clearance!!!
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Old August 2nd, 2011, 11:04 PM   #9
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Yes make sure you have hood clearance, cuz some times by adding the spacer, it makes your hood rub on your upper intake.....if it were me, i would just through the spacer in a box and forget about it unless you have tall valve covers
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Old August 3rd, 2011, 12:09 AM   #10
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thanks for the info guys. the guy is throwing in the phenolic spacer for free since i'm buying his upper and ported lower.
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Old August 3rd, 2011, 03:04 AM   #11
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let me put it this way... before the spacer i could fry my lunch (bacon, eggs, toast) on the manifold with a piece of aluminum on top thats how hot it got...

now i can hold it with both hands... although its screwed me cos i have to head back into town to get a proper "healthy" lunch lol...

so yes it works and has its advantages dependent on the setup of your motor... also much easier to get your hands under the manifold and mess about with injectors, wiring, valve covers, sensors, vac lines and anything else you would usually find hard to reach...

if you have a 3/8 spacer there shouldnt be much of a clearance issue just do the chewing gum test on the highest point of the upper manifold close the hood n see where you are and its not exactly difficult to remove if you dont want it after... i had a ram air hood from cervinis and it fit no problem with lots of space...

its a matter of preference, the set-up you have and at the end of the day its YOUR choice no one elses.
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Old August 4th, 2011, 12:31 AM   #12
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thanks for the input convertible. i think i'm going to just put it in anyway since it's free. even if it doesn't add that additional gains (not saying it would) i like the part where things are more accessible. my setup is is pretty basic, gt40 intake, gt40 heads with probably tfs1 cams OR stock cams. i haven't decided on the cams yet. just scouting a affordable head at the time.
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Old August 4th, 2011, 01:36 AM   #13
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Originally Posted by bennyjet846 View Post
probably tfs1 cams OR stock cams. i haven't decided on the cams yet.
*cam... lol
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Old August 4th, 2011, 02:19 AM   #14
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Originally Posted by bennyjet846 View Post
thanks for the input convertible. i think i'm going to just put it in anyway since it's free. even if it doesn't add that additional gains (not saying it would) i like the part where things are more accessible. my setup is is pretty basic, gt40 intake, gt40 heads with probably tfs1 cams OR stock cams. i haven't decided on the cams yet. just scouting a affordable head at the time.
the TFS cams are good cams... depending on what you want to get out of the engine choose your cam carefully...

i was looking between the stage 1 and an e303 but i liked the look of the e303 low end to midrange torque and a nice reggae idle...

go on youtube there are usually lots of sound clips of cars n the different cams they use...
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Old August 4th, 2011, 06:31 AM   #15
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i have a 3/8 spacer and a victor efi intake and a stock hood it can be done
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Old August 4th, 2011, 07:15 AM   #16
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Originally Posted by 89lx View Post
i have a 3/8 spacer and a victor efi intake and a stock hood it can be done
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Old August 6th, 2011, 06:59 AM   #17
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hey 89lx, did u use your stock intake bolts or did u have to get longer intake bolts to get it on?
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Old August 6th, 2011, 08:12 AM   #18
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you should be able to use the stock bots there is on 0.375" between it... anymore than that and i would have advised to get longer bolts. just use some threadlock on them to make sure their nice n snug.
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Old August 6th, 2011, 03:47 PM   #19
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Originally Posted by 1988 convertible View Post
you may need to touch your timing a micron or so but it shouldnt really affect it... would only affect it if you have something like a 1" spacer because air will take longer to travel down the manifolds to hit the fuel and burn...
lol. So let me get this straight, when you put a spacer on your intake the air will travel further, hence taking it longer to reach it's destination, and therefore you should retard your timing to compensate? Just want to make sure I'm reading that right.
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