AFR intake manifolds - Chevelle Tech
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post #1 of 23 (permalink) Old Mar 25th, 20, 1:27 PM Thread Starter
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AFR intake manifolds

Jegs has their cast alum piece for a little over 200 bux.

Currently have a ported Team G...it works good but could use a hari more plenum volume and do like the cooling crossover on the AFR.

Hoping fora little more airspeed to pull on the boosters, have 7-8 inches at 1000-1100 rpm on a good day

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post #2 of 23 (permalink) Old Mar 25th, 20, 1:33 PM
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Re: AFR intake manifolds

Timing locked out?
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post #3 of 23 (permalink) Old Mar 25th, 20, 3:23 PM Thread Starter
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Re: AFR intake manifolds

Forgot about that one....I have a summit wanna be msd system.
I know I have to pull it out, remove some pin turn 180 then?

What gets eliminated under the rotor? Spaced that one, sure it will help.

Swore I bookmarked instructions for that guess I didnt.
I put it off last time I asked as my oil pump pushrod falls to one side making dropping the dist a royal pain (broken back to boot) but will do it you think it will make it snappy as I want. It runs good but should run much harder.

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post #4 of 23 (permalink) Old Mar 25th, 20, 3:32 PM
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Re: AFR intake manifolds

Small diameter or HEI style?
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post #5 of 23 (permalink) Old Mar 25th, 20, 3:40 PM Thread Starter
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Re: AFR intake manifolds

small dia hei terminals.

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post #6 of 23 (permalink) Old Mar 25th, 20, 3:49 PM
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Re: AFR intake manifolds

https://www.summitracing.com/int/par...a/instructions

Locks out just like an MSD dist. If you aren't running vacuum advance, do it. You remove the advance center plate, weights, springs, bushings.
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post #7 of 23 (permalink) Old Mar 25th, 20, 4:00 PM
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Re: AFR intake manifolds

If you want a stronger booster signal then use a smaller carburetor with the straight long boosters. Big cfm carburetors always have less signal unless the carburetor has A/D boosters. That is another option for you.


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post #8 of 23 (permalink) Old Mar 25th, 20, 6:17 PM
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Originally Posted by pockets View Post
Timing locked out?
What does this ^^^^ mean ?

Vacuum Advance ?

Remove/lock out mech adv ?
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post #9 of 23 (permalink) Old Mar 25th, 20, 7:16 PM
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Re: AFR intake manifolds

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Originally Posted by Reelysalty View Post
What does this ^^^^ mean ?

Vacuum Advance ?

Remove/lock out mech adv ?
No centrifugal advance.
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post #10 of 23 (permalink) Old Mar 26th, 20, 11:23 AM Thread Starter
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Re: AFR intake manifolds

no vac advance mech only. I tried a 750 aed no real difference from this 850 except higher rpm its a little beter which was the build plan
Ill read those and perhaps tackle it this weekend. bet it comes alive

edit-thats the one pockets thanks

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post #11 of 23 (permalink) Old Mar 26th, 20, 11:34 AM Thread Starter
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Re: AFR intake manifolds

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How to set up the Mechanical Advance Lock Out.... 1. Remove the advance components including the springs, weights and the advance stop bushing from the advance assembly.2. Remove the roll-pin from the drive gear and remove the gear thrust and spacer washer from the shaft.3. Slide the shaft two inches out of the housing.4. Rotate the shaft 180 and insert the advance stop bushing pin into the small hole on the advance plate.5. Install the locknut and washer to the advance stop bushing pin. This locks the advance in place.6. Install the drive gear and roll-pin.
not sure wether to use the bushing currently in it or dig up ones in pkg?
383 11.5-1 260/268 SR 108lsa Isky
Single plane 850 AED 4.11 stick 26 in tire

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post #12 of 23 (permalink) Old Mar 26th, 20, 12:31 PM
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Re: AFR intake manifolds

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Originally Posted by cuisinartvette View Post
not sure wether to use the bushing currently in it or dig up ones in pkg?
383 11.5-1 260/268 SR 108lsa Isky
Single plane 850 AED 4.11 stick 26 in tire
If you want to use what came with the distributor,,,, unless you plan on locking it out
I would recommend the black bushing, one heavy silver & one light silver or blue spring
This will give you 18 all in by about 3000
Set the timing at 36 to 38 at 3000+ (18-20 static)
If you need to slow it down a little change the springs there is a chart in the instructions that are really simple to follow
IF you don't have them:
https://documents.holley.com/8516.pdf

Check your results when done,,, all spring may not be created equal...........

edit++++++
If you want more initial which you likely will,,,,, there is another bushing you can purchase
Performance Tuning MSD Distributors
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post #13 of 23 (permalink) Old Mar 26th, 20, 1:08 PM
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Re: AFR intake manifolds

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Originally Posted by cuisinartvette View Post
not sure wether to use the bushing currently in it or dig up ones in pkg?
383 11.5-1 260/268 SR 108lsa Isky
Single plane 850 AED 4.11 stick 26 in tire
Just lock it out. That cam, the engine will run best locked out. You do not use any bushing then, it is removed completely.
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post #14 of 23 (permalink) Old Mar 26th, 20, 6:06 PM Thread Starter
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Re: AFR intake manifolds

ok thats where I got confused
I had Bob Jennings (any of you 70s era racers remember him?) do it on a Sun machine a long time ago. Think he said he did his own thing with the bushing. Couldnt get it to "run" with any of the msd ones.
The bearings right out of the box were garbage. Got a note somewhere here with what he did Ill post it before i lock it out.
Its decent...but should come on better and occasionally if i give it a good blip off idel get a small hesitation.
Carb is spot on its not the shot or pump cam thanks.

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post #15 of 23 (permalink) Old Mar 26th, 20, 7:08 PM
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I would want all timing in by 1600, 2 light silver springs, 37 total, full manifold vacuum, 10” bushing

PM me if anyone wants 10” bushing
supplier info
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