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Author
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Topic: spacers: open vs 4-hole comparison
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Stang72
Gearhead Posts: 280
From: Arkel,Zuid-Holland,Holland
Registered: Jan 2003
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posted 06-06-2005 05:06 PM
   
I did a little test for myself..i had a open 1/2 spacer on it, and i have a 1" 4 hole (mr Gasket) spacer lying around,which was originally for my other car..waiting to be installed. so i swapped the open for the 4-hole. and tried it out.. makes a huge difference!.. definatly more low-end torque. no more Cold idle stumble. it picks up great.. now it only has a small hesitation a 3500-4000rpm, and after that it goes again like a Mustang should!!..but with some minor tuning..(jets??) that should be sorted in notime. just thought i shared that experience.. maybe someone has some use for it.. greetz Ben
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Fastymz
Moderator Posts: 20638
From: Reno Nv USA M&M#1240
Registered: Apr 2001
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posted 06-06-2005 05:48 PM
Ben, I had the same results with the same size spacers.  ------------------
oddly obsessed with big scoops on little Mustangs 65 coupe 351w C4 Big Boss 429 hood scoop,8" 3.40 TracLoc. My Pics
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sprcoop
Gearhead Posts: 501
From: Tucson, AZ usa
Registered: Jan 2000
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posted 06-06-2005 11:20 PM
Anybody have a clue why that would be? Increased velocity through the constricted air space? I still need to get a spacer for my setup. Mostly for the PCV connection.
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Moneymaker
Administrator Posts: 26811
From: Lyons, IL, USA
Registered: May 99
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posted 06-06-2005 11:45 PM
4 hole spacer helps strengthen the carb signal and allows it to pull from the boosters more smoothly and evenly.------------------
Alex Denysenko
Co-Administrator and Moderator NHRA/IHRA/SRA member and licensed Superstock driver
NHRA and IHRA SS/LA & SS/MA National Record Holder '00,'01,'02,'03,'04 &'05
First NHRA & IHRA 289 automatic Superstock Mustang in the TENS 06-99
First SS/MA in the TENS 04-03
IHRA division 5 Superstock Champion
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28 The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com
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Fastymz
Moderator Posts: 20638
From: Reno Nv USA M&M#1240
Registered: Apr 2001
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posted 06-07-2005 01:16 AM
quote:
Originally posted by sprcoop:
Anybody have a clue why that would be? Increased velocity through the constricted air space? I still need to get a spacer for my setup. Mostly for the PCV connection.
The tran-adapt #2547 is a phenolic 4 hole 1" spacer with a PCV port built in. I had one it was a nice unit. You can order it from Summit Racing. http://www.tdperformance.com/TransDapt.html ------------------
oddly obsessed with big scoops on little Mustangs 65 coupe 351w C4 Big Boss 429 hood scoop,8" 3.40 TracLoc. My Pics [This message has been edited by Fastymz (edited 06-07-2005).]
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Fastymz
Moderator Posts: 20638
From: Reno Nv USA M&M#1240
Registered: Apr 2001
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posted 06-07-2005 01:17 AM
quote:
Originally posted by Moneymaker:
4 hole spacer helps strengthen the carb signal and allows it to pull from the boosters more smoothly and evenly.
That and it has 4 holes rather then one hole, more is always better.   ------------------
oddly obsessed with big scoops on little Mustangs 65 coupe 351w C4 Big Boss 429 hood scoop,8" 3.40 TracLoc. My Pics
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Mach won
Gearhead Posts: 133
From: Walnut Grove, Ca. USA
Registered: Nov 2004
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posted 06-07-2005 01:22 AM
I've played around quite a bit with a 1" open spacer, a 1" 4 hole spacer, and a 1" Wilson tapered 4 hole spacer. The Wilson is . ------------------
71 Mach 1 351C Tremec 3550 3.89's (mine)
99 Mustang GT BIG injectors 75mm throttle body 5-speed 3.73's (sons)
03 Mach 1 (daughters)
02 Mustang GT Convertable 5-speed (wifes)
65 Mustang Road Race car (mine)
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Stang72
Gearhead Posts: 280
From: Arkel,Zuid-Holland,Holland
Registered: Jan 2003
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posted 06-07-2005 11:36 AM
i've heard the Wilson are supposed to be great.. so that will be one of the next things to order..
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f100cleveland
Gearhead Posts: 361
From: St. James, MN
Registered: Sep 2004
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posted 06-07-2005 01:41 PM
I would've loved to gone with a tapered Wilson's spacer but I had to have a 4 degree angle machined into my spacer to let the carb sit level. After looking at the Wilson's, I don't think you could get away with taking any material off of them to give them a taper. Oh well, I now have a Wilson's 4 hole that is matched to my intake and also has a little bit of a taper put into it. ------------------
1982 Ford F100 2wd Shortbox. Powered by a 357 Cleveland w/ closed chamber 4v's and a Funnelweb. Full Roller c-6 trans with Gear Vendors Overdrive and 4.86 geared Detroit Locker equipped 9" rear. 1982 F100 351c 4v 1977 F150 460 Burnout Truck
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kid vishus
Gearhead Posts: 6395
From: middle of NC
Registered: Oct 2000
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posted 06-07-2005 03:28 PM
We tried all sorts of different spacers on KK's car while it was strapped to the dyno. We found that when your cylinder heads are flow limited (ported '70 castings), there wasn't but a 5 hp difference from the worst to the best. And that was a test between a 1/2" 4 hole, a 1/2" open, a 1" open, and a 1" 4 hole. We ended up going back to the 1/2" 4 hole just because it gave us a touch more torque at 5000 rpm (only a couple of ft lbs, which honestly could have been variation from pull to pull), and a little more hood clearance. Where we really picked up power was turning the timing back.
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fastford34
Gearhead Posts: 1008
From: penna
Registered: May 2002
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posted 06-07-2005 03:28 PM
if a 1" 4 hole spacer helps , what will happen if you go to a 2" 4 hole spacer?
thanks.------------------
34 coupe powered by 351 c 4v
keith
it`s nice to be important but more IMPORTANT to be nice.
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Stang72
Gearhead Posts: 280
From: Arkel,Zuid-Holland,Holland
Registered: Jan 2003
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posted 06-07-2005 03:46 PM
quote:
Originally posted by fastford34:
if a 1" 4 hole spacer helps , what will happen if you go to a 2" 4 hole spacer?
thanks.
by then the carb is coming thru the hood????
i don't know, haven't tried that out..
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Fastymz
Moderator Posts: 20638
From: Reno Nv USA M&M#1240
Registered: Apr 2001
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posted 06-07-2005 05:33 PM
quote:
Originally posted by Stang72:
by then the carb is coming thru the hood????
..
Nothing wrong with that
Before I put my scoop. I had cut the round hole in the hood just big enough for the 14" air cleaner to fit in. It looked kinda cool and kinda odd with the air cleaner just sticking out of the hood.
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oddly obsessed with big scoops on little Mustangs 65 coupe 351w C4 Big Boss 429 hood scoop,8" 3.40 TracLoc. My Pics
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Stang72
Gearhead Posts: 280
From: Arkel,Zuid-Holland,Holland
Registered: Jan 2003
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posted 06-08-2005 12:24 PM
quote:
Originally posted by Fastymz:
Nothing wrong with that
Before I put my scoop. I had cut the round hole in the hood just big enough for the 14" air cleaner to fit in. It looked kinda cool and kinda odd with the air cleaner just sticking out of the hood.
jep. on both my cars i had to add a scoop of some sort.. strange actually.. everytime i mess with a car or build a engine for a car, something is sticking out of the hood.....
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Fastymz
Moderator Posts: 20638
From: Reno Nv USA M&M#1240
Registered: Apr 2001
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posted 06-08-2005 12:29 PM
quote:
Originally posted by Stang72:
jep. on both my cars i had to add a scoop of some sort.. strange actually.. everytime i mess with a car or build a engine for a car, something is sticking out of the hood.....
We must be related in some how.
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oddly obsessed with big scoops on little Mustangs 65 coupe 351w C4 Big Boss 429 hood scoop,8" 3.40 TracLoc. My Pics
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62falcon
Journeyman Posts: 11
From: grand rapids mi
Registered: Oct 2004
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posted 06-08-2005 03:45 PM
Ive asked this same question! has anyone tried a 2'' vs. a 1" 4 hole? Does the 2in spacer kill signal?
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Fastymz
Moderator Posts: 20638
From: Reno Nv USA M&M#1240
Registered: Apr 2001
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posted 06-08-2005 05:39 PM
Seems like the 2" would be more helpful on the top end and when using manifold like the vic jr.
The spacers all work different on every motor. https://mustangsandmore.com/ubb/Forum12/HTML/009017.html ------------------
oddly obsessed with big scoops on little Mustangs 65 coupe 351w C4 Big Boss 429 hood scoop,8" 3.40 TracLoc. My Pics [This message has been edited by Fastymz (edited 06-08-2005).]
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62falcon
Journeyman Posts: 11
From: grand rapids mi
Registered: Oct 2004
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posted 06-08-2005 05:56 PM
I believe that a 2in may help up top do ya think a 1" would help a little down low vs the 2 in? Test and tune huh?!
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Fastymz
Moderator Posts: 20638
From: Reno Nv USA M&M#1240
Registered: Apr 2001
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posted 06-09-2005 01:10 AM
I'd go with a 1" wilson spacer and never look back. MoneyMaker sells them and I'm sure he'll give you a good price.
I say go with the 1" 4-hole spacer first.------------------
oddly obsessed with big scoops on little Mustangs 65 coupe 351w C4 Big Boss 429 hood scoop,8" 3.40 TracLoc. My Pics [This message has been edited by Fastymz (edited 06-09-2005).]
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62falcon
Journeyman Posts: 11
From: grand rapids mi
Registered: Oct 2004
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posted 06-09-2005 09:05 AM
Thats the direction Im headed... Ive been using a 2in Wilson for a couple years...just wondered if the 1in might be a little better on the low end...
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