Intake manifold spacer?

Trefty · Jul 30, 2005

How well do they work and where is a good place to get one? Thanks.

luckythirteen13 · Jul 30, 2005

they work pretty well. i can bare hand my upper manifold just a few minutes after shutting the car down. the thicker the spacer, the higher up in the rpm band it will move power.
summit is a good place to get one

18mustangs · Jul 30, 2005

luckythirteen13 said:
the thicker the spacer, the higher up in the rpm band it will move power.

Perhaps my physics is a bit rusty, but doesn't a thicker spacer (which creates slightly longer runners) equal more power down low and shorter runners (like the box type intakes) equal more power in the higer RPM band?

vristang · Jul 30, 2005

18mustangs said:
Perhaps my physics is a bit rusty, but doesn't a thicker spacer (which creates slightly longer runners) equal more power down low and shorter runners (like the box type intakes) equal more power in the higer RPM band?

I didn't seem to get any power out of mine. I used it on the stock 302 with 1.7RR, Cobra Intake, and a chip.

Never did dyno it though, so hp/$ could be reasonable?

Trefty · Jul 30, 2005

I'm looking at getting a spacer for the purposes of having enough room between the mainfold and my valve covers, so any added power is purely a bonus. Do the kits include everything that is needed?

vristang · Jul 30, 2005

Trefty said:
I'm looking at getting a spacer for the purposes of having enough room between the mainfold and my valve covers, so any added power is purely a bonus. Do the kits include everything that is needed?

Double check when you order, but it should come with gaskets and bolts.

68torino · Jul 30, 2005

As I've read longer runners mean more torgue or bottom end. Short runners are for top end.

diddylx50 · Jul 30, 2005

I've also wondered if they work or not also. Im thinking about putting one on my car to see if it lowers the air intake temps...

luckythirteen13 · Jul 30, 2005

ive been pretty dislexic (sp?) this week so you may be right. i know for a fact that it will move the powerband. i bought mine for the sole purpose of clearing tall valve covers. it came with bolts and gaskets. two of the bolts were too short so i had to go to the local hardware store for a couple of longer ones

z9_87 · Jul 30, 2005

Yeah lowers the powerband a tad. They're not exenisive so a couple of extra horses makes it good hp/$ I also need one for Intake to valve cover clearance.

vristang · Jul 31, 2005

z9_87 said:
Yeah lowers the powerband a tad. They're not exenisive so a couple of extra horses makes it good hp/$ I also need one for Intake to valve cover clearance.

You and Trefty both mention needing extra clearance with the manifold. I am confused as to why you have a clearance problem in the first place. I assume hood clearance will not be an issue, if you are currently not clear of the valve cover. What are your combos?

z9_87 · Jul 31, 2005

Well I put the sn95 cobra upper on my car for hood clearance issues(it's shorter) but then it's so low that a little valve looking thing (don't know the name) on the bottom of it puts a hole in my valve cover over time as it wears on it. Needed the extra 1/2", but not the 3" the 86-93cobra/gt-40 gives.

As for the other guy, I'm going to guess he just has tall valve covers. Don't the 351's have much taller valve covers?

vristang · Jul 31, 2005

z9_87 said:
Well I put the sn95 cobra upper on my car for hood clearance issues(it's shorter) but then it's so low that a little valve looking thing (don't know the name) on the bottom of it puts a hole in my valve cover over time as it wears on it. Needed the extra 1/2", but not the 3" the 86-93cobra/gt-40 gives.

As for the other guy, I'm going to guess he just has tall valve covers. Don't the 351's have much taller valve covers?

I have the 351w in mine and it uses the same valve covers as the 302. He could be using taller covers for rocker clearance?

I did not realize there was a 3" height difference between the sn95 and the 93 Cobra manifold. Is the difference just in the upper intake?

z9_87 · Jul 31, 2005

yes just in the upper, I'm actualy using a 98 explorer lower and a 95 cobra upper because it ended up being cheaper that way.

just4bob50 · Jul 31, 2005

I have a 1" spacer on my gt-40. my peak power on the dyno came at 5300 rpms. I was wondering if i should remove the spacer now that i have a supercharger on. Maybe try to move the peak power up in the rpm range a little to make better use of the boost. Any opinions on weather it will help.

jaackal · Aug 1, 2005

luckythirteen13 said:
ive been pretty dislexic (sp?) this week so you may be right. i know for a fact that it will move the powerband. i bought mine for the sole purpose of clearing tall valve covers. it came with bolts and gaskets. two of the bolts were too short so i had to go to the local hardware store for a couple of longer ones

This happened to be, but NONE of the hardware stores locally or home depot or anyone had the bolts, i belive they needed to be 7 inches long and they only went up to 6, so i went to boltdepot.com to get the bolts, so if you run into any problem with bolt sizes go there

Intake manifold spacer?

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