Cliff R Cliff R is offline

Ultimate Warrior

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  1. Cliff R
    09-13-2022 07:12 AM
    Cliff R
    I'm pretty sure I have one of those, will check today when I get to the shop. Send me an email to:

    Better to correspond there..
  2. Fxnjetz56
    09-12-2022 09:40 PM

    Hope all is well…

    Corresponded a couple of years ago on an engine build I was contemplating…took 15 months, but finally got it back from builder.

    Anyway, I’m currently hunting for a Dashpot assy. For 67 quadrajet with auto trans.

    Any chance you might have one? Or know someone who does?

  3. Cliff R
    02-16-2022 07:54 PM
    Cliff R
    Glad to help out....
  4. mpmsmuscle
    02-16-2022 03:02 PM
    Thanks for your help Cliff.
  5. Cliff R
    02-16-2022 01:46 PM
    Cliff R
    Should be fine. Lift increases wear so less is good in any engine that will see a lot of street miles.

    If the engine isn't going to get but a few hundred miles a year then it really doesn't matter much.....
  6. mpmsmuscle
    02-16-2022 12:27 PM
    I’m not sure of which lobe lift or center line to use? I’m thinking this Custom Grind should meet my target goals.
    What do you think? Thanks for you advice.

    248/256 @ .050 duration
    614/614 w 1.52 r
    675/675 w 1.65 r
    111 or 112 LSA
  7. Cliff R
    02-16-2022 10:59 AM
    Cliff R
    I use and prefer wider LSA here for anything that will end up driven on the street. It reduces overlap, improves vacuum at idle, power and performance at light engine load, etc. Tight LSA is strictly done for "menacing" idle quality unless we are talking about cams with over .260 @ .050" duration and full-race stuff. So basically you reach a point with duration where you have to pull the LSA down a bit or you put peak power beyond the "target" or the RPM capabilities of the assembly.....
  8. mpmsmuscle
    02-16-2022 10:42 AM
    Thanks for your help Cliff. I don’t understand why Butler would recommended an Extreme Marine Grind, unless it’s just the lobe lift that he was looking for. I think that grind and lift is probably 625 ish on HP. And the 111 LSA? I was thinking 112.

    Lobe 3371/3373
    .380 lobe lift
    .570/.570 w 1.52
    .627/.627 w 1.65
  9. Cliff R
    02-16-2022 07:31 AM
    Cliff R
    You woln't have trouble making 650hp with that much head flow but at 10.6 to 10.8 the cam needed will not make a lot of vacuum at idle speed.

    Good thing is that you have a manual transmission so idle quality isn't as big a deal as with an auto trans car. I'd look at the Road Paver cam from Dave at SD or something in that range. They are around 244/254 @ .050" on a 112LSA. You might fall a tad short on HP but it will make up for it in idle quality and street manners.

    We have one here in a 455 (468) with 11.3 to 1 compression (iron heads) and it idles really nice for that much camshaft. Has good street manners as well........
  10. mpmsmuscle
    02-16-2022 03:24 AM
    Cliff, I am building a 455 stroker and need some advice on camshaft selection. I will be using a hydraulic roller and was advised to use solid roller lifters. My target hp is 650 to 660 hp, pump gas, power brakes with street manners in a 3900 lb car with a 4 spd M-22 transmission. . Compression is 10:6 to 10:8.1. This car will be mainly driven on the street, and I would trust your advice over many. Thanks in advance. Jimmy

    73 455 block bored .060 over with zero deck height
    474 stroker
    Ohio forged 4.25 crankshaft
    Weisco flat top pistons 10cc valve relief
    Crower 6.700 sportsman rods
    Kauffman High Port heads
    Northwind 4500 intake
    Pro form 850 carb
    Doug’s headers
    12 bolt GM reared with 3.73 gears
    Muncie M-22 transmission

    Lift Int. Ex. Int/Ex ratio
    .200 134 134 100%
    .300 201 186 92%
    .400 260 227 87%
    .500 306 255 83%
    .600 332 265 79%
    .700 342 271 79%
    .800 350 277 79%

    254/262 duration @ .050
    .570/.570 lift with 1.52 r
    .627/.627 lift with 1.65 r
    111 LSA

About Me

  • About Cliff R
    Retired and self employed. Got the new shop finished, buried in carb work!
    Mount Vernon, Ohio 43050
    Racing, performance cars
  • Signature
    If you can read this, thank a teacher. If you can read this in English, thank a Veteran!
    73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile),


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  • Join Date: 11-09-2000
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