Speed-Talk is running on www.Speed-Talk.com

IMPORTANT: Update your bookmarks to https://www.speed-talk.com/forum/
(Right-click the URL and select "Bookmark this link")

Carburetor spacers

General engine tech -- Drag Racing to Circle Track

Moderator: Team

1980RS
Expert
Expert
Posts: 614
Joined: Thu Oct 13, 2016 10:03 am
Location:

Re: Carburetor spacers

Post by 1980RS »

Last year my peanut port 461 BBC engine with the Single plane intake liked the 2" 4 hole tapered spacer the best. The RPM Performer like the 1" open spacer the best and hated the 4 hole spacer.
User avatar
BOOT
Guru
Guru
Posts: 2279
Joined: Fri Apr 09, 2010 6:23 pm
Location: Michigan

Re: Carburetor spacers

Post by BOOT »

If Speedmaster has a sale like the past few years, then their spacers will be pretty cheap for Black Friday. Obviously not as nice as my HVH but one can easily spend hundreds on spacers to try out, I have LOL

I got a 1" and 2" tapered that seem to be flat and good enough for my use.
Channel about my projects https://www.youtube.com/user/BOOT350V

I know as much as I can learn and try to keep an open mind to anything!

If I didn't overthink stuff I wouldn't be on speedtalk!
rustbucket79
Guru
Guru
Posts: 2087
Joined: Fri Apr 07, 2006 8:23 pm
Location:

Re: Carburetor spacers

Post by rustbucket79 »

If the speedmaster spacers are like their heads and intakes, the holes in the spacers will be all over the place. [-X

Verify after installation, I have come across spacers that I tossed in the trash due to misalignment.
ArizonaGuy
New Member
New Member
Posts: 31
Joined: Thu Dec 24, 2020 4:25 pm
Location: Phoenix, Arizona

Re: Carburetor spacers

Post by ArizonaGuy »

When one spacer needs significantly more idle mixture (no other changes), what does that tell me?
HQM383
Member
Member
Posts: 55
Joined: Sun Sep 12, 2021 7:25 am
Location: Down under

Re: Carburetor spacers

Post by HQM383 »

ArizonaGuy wrote: Fri Dec 03, 2021 9:46 am When one spacer needs significantly more idle mixture (no other changes), what does that tell me?
Reduced atomization and distribution.
1980RS
Expert
Expert
Posts: 614
Joined: Thu Oct 13, 2016 10:03 am
Location:

Re: Carburetor spacers

Post by 1980RS »

So, which way is the right way to use a tapered spacer on an intake? 4 holes down or up? Asking for a friend :lol:
steve cowan
Guru
Guru
Posts: 1455
Joined: Wed Jul 27, 2011 5:22 am
Location: brisbane AUSTRALIA

Re: Carburetor spacers

Post by steve cowan »

20210130_132033.jpg
20210130_132013.jpg
20210130_132002.jpg
20210130_131953.jpg
20210130_131941.jpg
I like the Reher and Morrison tapered spacer and shear plate.have used on a few combinations
You do not have the required permissions to view the files attached to this post.
steve c
racear2865
Guru
Guru
Posts: 1553
Joined: Mon Sep 21, 2009 11:58 pm
Location: tenn

Re: Carburetor spacers

Post by racear2865 »

1980RS wrote: Fri Dec 03, 2021 6:14 pm So, which way is the right way to use a tapered spacer on an intake? 4 holes down or up? Asking for a friend :lol:
Try it both ways. I bet u will be surprised with the results
reed
1980RS
Expert
Expert
Posts: 614
Joined: Thu Oct 13, 2016 10:03 am
Location:

Re: Carburetor spacers

Post by 1980RS »

racear2865 wrote: Fri Dec 03, 2021 8:56 pm
1980RS wrote: Fri Dec 03, 2021 6:14 pm So, which way is the right way to use a tapered spacer on an intake? 4 holes down or up? Asking for a friend :lol:
Try it both ways. I bet u will be surprised with the results
reed
Thanks, we got in an argument about that.
steve cowan
Guru
Guru
Posts: 1455
Joined: Wed Jul 27, 2011 5:22 am
Location: brisbane AUSTRALIA

Re: Carburetor spacers

Post by steve cowan »

Very interesting,
I want to try a reverse taper 2" spacer as well but didn't want to mention it as I have not heard or talked to anyone about it 🤔
steve c
User avatar
MadBill
HotPass
HotPass
Posts: 15017
Joined: Tue Nov 15, 2005 10:41 am
Location: The Great White North

Re: Carburetor spacers

Post by MadBill »

1980RS wrote: Fri Dec 03, 2021 6:14 pm So, which way is the right way to use a tapered spacer on an intake? 4 holes down or up? Asking for a friend :lol:
My post around eight back answers that for at least one SBC. I'd like to hear details re any engine that made more power with the four holes down.
Felix, qui potuit rerum cognscere causas.

Happy is he who can discover the cause of things.
1980RS
Expert
Expert
Posts: 614
Joined: Thu Oct 13, 2016 10:03 am
Location:

Re: Carburetor spacers

Post by 1980RS »

MadBill wrote: Sat Dec 04, 2021 4:52 pm
1980RS wrote: Fri Dec 03, 2021 6:14 pm So, which way is the right way to use a tapered spacer on an intake? 4 holes down or up? Asking for a friend :lol:
My post around eight back answers that for at least one SBC. I'd like to hear details re any engine that made more power with the four holes down.
I ran it with the 4 holes up on my car and it picked up almost 2 tenths and 1 mph then the next week put the same spacer on the dual plane intake and promptly lost 2 more tenths after the baseline that day, buy the open 1" spacer was .003 better than the single plane and the 2" tapered spacer on the single plane intake. Kind of a wash if you ask me.
Post Reply