Author Topic: Goofing off with some CJ heads...  (Read 1816 times)

0 Members and 1 Guest are viewing this topic.

blykins

  • Hero Member
  • *****
  • Posts: 1591
    • View Profile
    • Lykins Motorsports
Re: Goofing off with some CJ heads...
« Reply #15 on: June 23, 2018, 01:43:02 PM »
What is the highest flow numbers ever heard of with highly modified cj heads

I've seen some 300 cfm CJ heads before.  Blair could probably tell you what some of the older Super Stock heads would do.
Brent Lykins
Lykins Motorsports
www.lykinsmotorsports.com
brent@lykinsmotorsports.com
502-759-1431
Instagram:  brentlykinsmotorsports

Joe-JDC

  • Hero Member
  • *****
  • Posts: 596
  • Truth stands on its own merit.
    • View Profile
Re: Goofing off with some CJ heads...
« Reply #16 on: June 23, 2018, 03:35:20 PM »
I have ported several sets that flowed 310-315 cfm, and 210 on exhaust.  Joe-JDC
Joe-JDC '70GT-500

My427stang

  • Hero Member
  • *****
  • Posts: 2042
    • View Profile
Re: Goofing off with some CJ heads...
« Reply #17 on: June 23, 2018, 04:22:06 PM »
They sure look prettier than when they lived in Omaha :)

Well done for a set of stock heads
---------------------------------
Ross

- 70 Fastback Mustang, 489 cid FE, Victor, SEFI, Erson SFT cam, TKO-600 5 speed, 4.11 9 inch.
- 71 F100 shortbed 4x4, 445 cid FE, headers, RPM , 1000 Holley HP, Bullet SFT cam, 4 speed

bluef100fe

  • Full Member
  • ***
  • Posts: 194
    • View Profile
Re: Goofing off with some CJ heads...
« Reply #18 on: June 24, 2018, 10:11:05 PM »
Best I've personally done with a C1 head was 296/19x @0.700 with 2.09/1.65 valves 3/8 stems. I often wondered if the CJ casting was at all any better than the C1's these were flowed on a sf600 on 4.312 bore fixture.


<a href="https://servimg.com/view/14375057/64" target="_blank" ><img  src="https://i58.servimg.com/u/f58/14/37/50/57/img_2013.jpg" border="0" alt="Image hosted by servimg.com" /></a>

Cody Ladowski
1976 F-100 stepside
390 C6 9 inch
1.56 sixty ft.
7.38 @ 91.5
11.79 @ 111.5

chilly460

  • Full Member
  • ***
  • Posts: 240
    • View Profile
Re: Goofing off with some CJ heads...
« Reply #19 on: June 25, 2018, 07:50:44 AM »
That's good info, I have some ugly CJ heads here with a weld repair and already been ported, no idea what I am going to do with them but they'd be a candidate for full porting.  I need to actually drag them out and see what the difference is in the intake port between CJs and C1s, if any.  I've read that the CJ looks like a LR port, but after the opening it ramps up and is more like a MR once you're in the runner.  I didn't think an FE has enough runner length for all that transition so we'll see.  Have one unported MR head I can compare as well. 

In my little spreadsheet of head flows, highest flow for a LR port I have found is 290 @ .700 but it's not a very big sample size

CaptCobrajet

  • Sr. Member
  • ****
  • Posts: 400
    • View Profile
Re: Goofing off with some CJ heads...
« Reply #20 on: June 25, 2018, 11:59:03 AM »
10+ years ago, I went 9.30's with iron heads in my Super Stock 428.  330-ish intake flow, 250-ish exhaust with brass in the floors.  Heads were 155cc intake runner, and 121cc exhaust, mandated 3/8 stem valves, 2.097 and 1.665 diameters.  Current rules favor the aluminum heads, even with the weight penalty.

For "no rules" uses, the cost to get really good numbers is prohibitive, compared to several aluminium options these days.  Mild OE-appearing stuff, truck towing engines, or CJ restoration stuff are the places to use a CJ head these days, in my opinion.  You just can't get anywhere close to the bolt-on aluminum heads from BBM and TFS with OE iron.
Blair Patrick

blykins

  • Hero Member
  • *****
  • Posts: 1591
    • View Profile
    • Lykins Motorsports
Re: Goofing off with some CJ heads...
« Reply #21 on: July 09, 2018, 12:09:33 PM »
I love this shot...

Brent Lykins
Lykins Motorsports
www.lykinsmotorsports.com
brent@lykinsmotorsports.com
502-759-1431
Instagram:  brentlykinsmotorsports

cattleFEeder

  • Jr. Member
  • **
  • Posts: 73
    • View Profile
Re: Goofing off with some CJ heads...
« Reply #22 on: July 09, 2018, 12:39:37 PM »
Little big for a street master isn't it.
Remember, RPM is your friend

blykins

  • Hero Member
  • *****
  • Posts: 1591
    • View Profile
    • Lykins Motorsports
Re: Goofing off with some CJ heads...
« Reply #23 on: July 09, 2018, 12:48:29 PM »
Physically.  :)

It's actually a Portosonic.
Brent Lykins
Lykins Motorsports
www.lykinsmotorsports.com
brent@lykinsmotorsports.com
502-759-1431
Instagram:  brentlykinsmotorsports

KMcCullah

  • Hero Member
  • *****
  • Posts: 506
    • View Profile
Re: Goofing off with some CJ heads...
« Reply #24 on: July 09, 2018, 01:52:12 PM »
I love this shot...



Hey Brent, how about a shot of that carb spacer?
Kevin McCullah

Drew Pojedinec

  • Hero Member
  • *****
  • Posts: 1399
    • View Profile
Re: Goofing off with some CJ heads...
« Reply #25 on: July 09, 2018, 01:59:02 PM »
What the heck..... you couldn't fit two dommies :P

blykins

  • Hero Member
  • *****
  • Posts: 1591
    • View Profile
    • Lykins Motorsports
Re: Goofing off with some CJ heads...
« Reply #26 on: July 09, 2018, 02:02:08 PM »
What the heck..... you couldn't fit two dommies :P

Give me an intake adapter, a UR-19 intake, and we'll get on that!

I have a set of carbs and carb spacers to try out on my 390 project.  Went ahead and had a 4150/4500 HVH adapter matched to it.  I had good results from trying a skirted booster Dommie on a 354C with a Strip Dominator intake, so I always try one when I can on the higher rpm stuff. 

Brent Lykins
Lykins Motorsports
www.lykinsmotorsports.com
brent@lykinsmotorsports.com
502-759-1431
Instagram:  brentlykinsmotorsports

Drew Pojedinec

  • Hero Member
  • *****
  • Posts: 1399
    • View Profile
Re: Goofing off with some CJ heads...
« Reply #27 on: July 09, 2018, 02:15:39 PM »
Cool, gonna be super cool when all done.

I honestly don't know much at all about 4500's, kinda outside my realm of interest.

Barry_R

  • Hero Member
  • *****
  • Posts: 1140
    • View Profile
    • Survival Motorsports
Re: Goofing off with some CJ heads...
« Reply #28 on: July 09, 2018, 02:25:54 PM »
I honestly don't know much at all about 4500's, kinda outside my realm of interest.

You would like them.

You would like them a lot... 8)

Joey120373

  • Full Member
  • ***
  • Posts: 123
    • View Profile
Re: Goofing off with some CJ heads...
« Reply #29 on: July 09, 2018, 03:06:15 PM »
Man, at first I thought that was an Edelbrock P2S2 ( think that’s what it’s called...)
Thought it was a joke.....

Now I’m kinda interested in how that combo might shake out....