Plenum,2925?

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88bluestar
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Re: Plenum,2925?

Post by 88bluestar » Fri Apr 05, 2019 4:55 pm

Certain appreciate the suggests guys, what burrs would you recommend? I was thinking of either a ball or long oval type burr to roll back the edges into the roof of the ports. I have 1.5 inches roughly as far as spacers height though I do want to account for paper gaskets as well just in case our tech guy complains. I was planning to at least run either an open spacer or 4 hole tapered one to try it out. Haven’t planned to do any porting in the heads aside from what’s been done because I really don’t want to kill anymore velocity. I remember on here someone had told me the throats on these EQ heads are already pretty big so I figured it makes sense to not get to crazy. Will post pics of what I have here shortly.
Last edited by 88bluestar on Fri Apr 05, 2019 5:15 pm, edited 1 time in total.

88bluestar
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Re: Plenum,2925?

Post by 88bluestar » Fri Apr 05, 2019 5:14 pm

Pics.
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Re: Plenum,2925?

Post by 88bluestar » Fri Apr 05, 2019 5:22 pm

Pics2
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Re: Plenum,2925?

Post by mag2555 » Sat Apr 06, 2019 6:57 am

I like to go slow with the Plenum roof rework so I use a 80 grit long type taper sanding roll in my veri speed grinder.
The tip of the sanding roll allows you to get into the roof to wall area better so you just don't end up kicking up the center of the roof like you get most times with just a Burr.
You will go thru 8 to 10 rolls doing this so have enough on hand!

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Re: Plenum,2925?

Post by CGT » Sat Apr 06, 2019 8:47 am

Bluestar. Listen to Zums.
"If you pick up a starving dog and make him prosperous, He will not bite you. This is the principal difference between a dog and a man"

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Re: Plenum,2925?

Post by racinnut15xm » Sat Apr 06, 2019 9:41 am

zums wrote:
Fri Apr 05, 2019 12:56 pm
There wont be anything "lazy" about that intake with that cube and rpm, if spacers are allowed get a max height allowed blended 4 hole that has the 7 degree taper, if not i would lay the eyebrows back in the plenum and radius the inner runner roofs toward the carb barrels, those intakes are good but need work
Tom
This has been our experience as well. A 4 hole 2in super sucker is a huge pickup throughout the RPM.

88bluestar
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Re: Plenum,2925?

Post by 88bluestar » Sat Apr 06, 2019 9:59 am


racinnut15xm
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Re: Plenum,2925?

Post by racinnut15xm » Sat Apr 06, 2019 10:07 am

88bluestar wrote:
Sat Apr 06, 2019 9:59 am
Similar to this right?
https://pitstopusa.com/i-5074550-wilson ... pered.html
https://www.amazon.com/High-Velocity-He ... ive&sr=1-1

HVH is a little cheaper version but not light weight

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Re: Plenum,2925?

Post by steve cowan » Sat Apr 06, 2019 7:08 pm

racinnut15xm wrote:
Sat Apr 06, 2019 9:41 am
zums wrote:
Fri Apr 05, 2019 12:56 pm
There wont be anything "lazy" about that intake with that cube and rpm, if spacers are allowed get a max height allowed blended 4 hole that has the 7 degree taper, if not i would lay the eyebrows back in the plenum and radius the inner runner roofs toward the carb barrels, those intakes are good but need work
Tom
This has been our experience as well. A 4 hole 2in super sucker is a huge pickup throughout the RPM.
agree 100%- i have several intakes and several different spacers i have used on street/strip for the last 3-4 years and i always come back to HVH ss,i believe it gives a better fuel distribution as after a 1/4 mile pass the spark plugs always look more uniform,but i am partial to my Reher and Morrison tapered spacer with 4 hole sheer plate :wink:
my engines 327-383 sbc 430-520hp, 6000-7600rpm
go the super sucker.
steve c

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Re: Plenum,2925?

Post by steve cowan » Sat Apr 06, 2019 7:08 pm

racinnut15xm wrote:
Sat Apr 06, 2019 9:41 am
zums wrote:
Fri Apr 05, 2019 12:56 pm
There wont be anything "lazy" about that intake with that cube and rpm, if spacers are allowed get a max height allowed blended 4 hole that has the 7 degree taper, if not i would lay the eyebrows back in the plenum and radius the inner runner roofs toward the carb barrels, those intakes are good but need work
Tom
This has been our experience as well. A 4 hole 2in super sucker is a huge pickup throughout the RPM.
agree 100%- i have several intakes and several different spacers i have used on street/strip for the last 3-4 years and i always come back to HVH ss,i believe it gives a better fuel distribution as after a 1/4 mile pass the spark plugs always look more uniform,but i am partial to my Reher and Morrison tapered spacer with 4 hole sheer plate :wink:
my engines 327-383 sbc 430-520hp, 6000-7600rpm
go the super sucker.
steve c

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Re: Plenum,2925?

Post by 88bluestar » Mon Apr 08, 2019 1:04 am

Which part number for the 1” spacer?

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Re: Plenum,2925?

Post by steve cowan » Mon Apr 08, 2019 1:32 am

1'' HVH super sucker part # SS4150-1P

Bluestar- if you going to modify the carb base port entry transition for better line of sight i suggest
you do not piss around with the dividers to much,meaning dont remove material there only casting flash,some people make the divider sharp point at the top,i suggest not to do that.
steve c

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Re: Plenum,2925?

Post by 88bluestar » Mon Apr 08, 2019 11:07 am

On the dividers I know not to mess with them. From reading on here over the years I've seen a few intakes get ruined because of that. Youtube is a bad place, watching people butcher intakes is sad lol! I prefer to do as minimal work as possible without hacking on an intake.

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Re: Plenum,2925?

Post by 88bluestar » Tue Apr 09, 2019 11:22 pm

Opinions?
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Re: Plenum,2925?

Post by steve cowan » Wed Apr 10, 2019 3:23 am

blue star-
hers a few pictures of my super victor 2925,modified plenum,flange gasket is 1206 intake
sizes are without radius taken into account.
runner at the head 1206 gasket-1.3'' W x 2.2'' H
runner at the plenum 3.2'' H x 1.1'' W does vary runner to runner ,top to bottom.
plenum is very close to 3.8'' x 3.8'' at carb base
plenum height off floor 3.85'' to carb pad.
photos - note that the tapered spacer and the open spacer do not match they would require work.
hope this helps and maybe Tom (ZUMS) might comment as well.
super victor 2925 and spacers 001.JPG
super victor 2925 and spacers 002.JPG
super victor 2925 and spacers 003.JPG
super victor 2925 and spacers 004.JPG
super victor 2925 and spacers 005.JPG
super victor 2925 and spacers 006.JPG
super victor 2925 and spacers 007.JPG
super victor 2925 and spacers 008.JPG
super victor 2925 and spacers 009.JPG
super victor 2925 and spacers 010.JPG
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