Welcome to Club Hot Rod!  The premier site for everything to do with Hot Rod, Customs, Low Riders, Rat Rods, and more. 

  •  » Members from all over the US and the world!
  •  » Help from all over the world for your questions
  •  » Build logs for you and all members
  •  » Blogs
  •  » Image Gallery
  •  » Many thousands of members and hundreds of thousands of posts! 

YES! I want to register an account for free right now!  p.s.: For registered members this ad will NOT show

 
Like Tree2Likes
  • 1 Post By glennsexton
  • 1 Post By rumrumm

Thread: 327 with power pack heads, cam question
          
   
   

Reply To Thread
Results 1 to 6 of 6
  1. #1
    Whiteriviera is offline CHR Member Visit my Photo Gallery
    Join Date
    Feb 2012
    Location
    Munich
    Car Year, Make, Model: 71 Buick GS,63 Buick Riviera,71 Skylark
    Posts
    5

    327 with power pack heads, cam question

     



    Hello, Im new to this site and hoping for a little help.
    Im currently working on my friends 67 el camino, the car has a 67 327 with the 283 power pack heads on it, so I think this was the standard combination for the 250hp version. In the past weve installed shorty headers and 2.5" dual exhaust, weiand dual plane intake and a 650 holley vacuum secondaries, car has stock converter and I believe 3.08 gears.
    Now we are looking for a nice street cam (hydraulic flat tappet) setup. I know the 283 heads are limiting the powerband. Can anybody recommend a good cam and probably lifters and valve springs?
    I really appreciate your help.
    Thanks a lot, Bastian.

  2. #2
    glennsexton's Avatar
    glennsexton is offline CHR Member/Contributor Visit my Photo Gallery
    Join Date
    Mar 2005
    Location
    Tigard
    Car Year, Make, Model: 63 Nova SS
    Posts
    1,649

    Welcome to CHR, Bastian youll find a lot of good hot rod and engine building "know how" here and were a real nice bunch of guys and gals who love cars!

    The 327 is an all time favorite of mine. Youre correct in your assessment of the heads and I think a kit from summit such as a SUM-K1102 for $99.95 is tough to beat. It will work well with the combination of pieces that you have added with a noticeable difference in the 1500 4000RPM range. If youre working with a Powerglide, Id use this cam.

    The SUM-K1103 (also $99.95 for the cam and lifters) will give you a bit more mid range, but is at the edge for stock stall converter and a 3.08 rear end. If you have a TH350, this cam would be okay as the 350 uses a 2.52 low versus the 1.76 for the Powerglide.

    Others will chime in Im sure

    Again, welcome to CHR!
    Glenn
    1gary likes this.
    Real Integrity is doing the right thing, knowing that nobody's going to know whether you did it. Only in the dictionary does "success" come before "work"

  3. #3
    rumrumm's Avatar
    rumrumm is offline CHR Member Visit my Photo Gallery
    Join Date
    Jan 2004
    Location
    Macomb
    Car Year, Make, Model: '32 Ford 3W Coupe, 383 sbc
    Posts
    1,387

    FWIW, 250 hp 327 heads have the same power pack molding marks as the 283 heads. The intake valves are 1.72 inches while he exhaust valves are 1.5 inches. 283 heads are the same size. You can check casting numbers here:

    Small Block Chevy Cylinder Head Identification

    Glenn gave you some good choices for cams to wake up that 327. What is holding this vehicle back is the 3.08 rear gears and the Powerglide tranny. Switching the rear gears to 3.70 would make a huge difference in how it performs. A TH 350 tranny would also help considerably. I am not a fan of Powerglides. Something for him to think about down the road.
    Last edited by rumrumm; 02-06-2012 at 08:41 AM.
    glennsexton likes this.


    Lynn
    '32 3W

    There's no such thing as a girl too pretty or a car too fast!

    http://photo.net/photos/Lynn%20Johanson

  4. #4
    Whiteriviera is offline CHR Member Visit my Photo Gallery
    Join Date
    Feb 2012
    Location
    Munich
    Car Year, Make, Model: 71 Buick GS,63 Buick Riviera,71 Skylark
    Posts
    5

    Hello, thank you for your help guys.
    I forgot to mention the car has a Th350 trans. I dont think the owner wants to change out the rear gears, because this car is driven a lot on the street, in the summer its his daily driver. He was only thinking about throwing in my old b&m stall converter in the car, but I think the stall is too high for a street car. The converter stalled at about 2900rpm behind my 500ft lbs big block, should be around 2400 behind the 327, or am I wrong?
    But anyway the SUM-K1103 cam from Summit looks like a good choice. just need to find replacement valve springs, dont want to re-use the old springs. I will give the heads a small pocket port job, this should help them to breath a bit better.

    If your interested here is a picture of the 1967 el camino behind the riviera.
    http://www.flickr.com/photos/whiteri...57629081515217

    thanks again, best regards bastian

  5. #5
    rumrumm's Avatar
    rumrumm is offline CHR Member Visit my Photo Gallery
    Join Date
    Jan 2004
    Location
    Macomb
    Car Year, Make, Model: '32 Ford 3W Coupe, 383 sbc
    Posts
    1,387

    The stall converter would be a good idea. 2400 stall speed should be fine for that application.


    Lynn
    '32 3W

    There's no such thing as a girl too pretty or a car too fast!

    http://photo.net/photos/Lynn%20Johanson

  6. #6
    glennsexton's Avatar
    glennsexton is offline CHR Member/Contributor Visit my Photo Gallery
    Join Date
    Mar 2005
    Location
    Tigard
    Car Year, Make, Model: 63 Nova SS
    Posts
    1,649

    I concur with Lynn - 2400 stall and the 1103 kit would be a good fit with the TH350 with the 3.08. Won't see God on launch, but will definitely notice performance improvement over stock!

    For springs, I'd go with "Z28" type springs - they're readily available for well under $100 - key is to stay at or below 325# open to preserve the integrity of the cam and lifters.

    Check this link

    Z28 Valve Springs, Retainers & Locks sb Chevy 265 283 305 327 350 400 sbc | eBay

    Regards,
    Glenn
    Real Integrity is doing the right thing, knowing that nobody's going to know whether you did it. Only in the dictionary does "success" come before "work"

Reply To Thread

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
Links monetized by VigLink