UltraDyne Cam Specs


The information and pages posted below were found in the internet-archive.org and are purely for historical purposes only.


ULTRADYNE CAM LISTINGS:
426 HEMI CAMS – – “B/RB” BigBlock CAMS – – “LA” SmallBlock CAMS


ULTRADYNE CHRYSLER CAMS


Are you looking for a real Chrysler camshaft designed for the Chrysler .904 lifter? Our mechanical flat tappet cams are not just a Chrysler core with a (Chevy) .842 lifter grind on them. They are designed to take full advantage of the .904 Mechanical flat tappet lifter and we can prove it!

It is true that we do not have a Hydraulic flat tappet cam designed for the .904 diameter lifter but they are coming soon. It is also possible for us to have ".842" or ".875" designs ground on a Chrysler cam core if the application warrants i.e. less lift, milder acceleration rates etc. Some maybe listed in the catalog that have been ground in that configuration and they are popular grinds so we list them, but we DO have masters specifically designed for the .904 Mechanical flat tappet lifter.

Note From Harold:
We have had some feed back from "A concerned Citizen" that we are lying when we say we are making real Chrysler cams, and that we are making Chevy Cams and calling them Chryslers. That’s true as far as Hydraulics go, but then our Chevy profiles are superior to others. When MUSCLE MOTORS  first Dyno-tested our cams around 1990, they found our .875" lifter 309 outperformed  EVERY mechanical flat tappet cam offered for the 440 with less wear.

Our NF .904" cams are .017" from the edge of a .904 tappet, and here’s a comparison showing who makes the " REAL CHRYSLER CAMS" (All data from published website info)

This is for any "concerned citizens"

Manufacturer/Grind .020 .050 .200 Valve Lift (1.5 Rocker)
UltraDyne (NF60/NF57) 278/282 251/255 168/172 .570/.582
Hughes/Engle 275/281 245/250 164/167 .560/.575
         
UltraDyne (NF59/NF64) 290/298 263/271 181/188 .597/.620
Hughes/Engle 287/295 256/263 167/175 .587/.602
         
UltraDyne (1980 .842" Lifter) 292 259 170 .551
Crane (1998 .904" Lifter) 294 258 166 .560
         
UltraDyne (1985 .875" Lifter) 309 276 190 .613
Crane (1998 .904" Lifter) 314 278 186 .600

 

Let the numbers speak for themselves.                   
UltraDyne Masters Comparison

NF
.842 FLAT TAPPET CAMS VL =.016" 1.5:1
.020

duration

.050

duration

.200

duration

lobe

lift

104 106 108 110 1.5 1.6 1.7
274 244 154 .3468 .107 .099 .092 .085 .520 .555 .590
278 248 158 .3534 .113 .106 .099 .092 .530 .565 .600
282 252 162 .3608 .120 .113 .106 .099 .541 .577 .613
286 256 167 .3680 .126 .119 .112 .105 .552 .589 .625
290 260 170 .3750 .134 .127 .120 .113 .563 .600 .638
294 264 174 .3820 .140 .133 .126 .119 .573 .611 .649
298 268 178 .3887 .148 .141 .134 .127 .583 .622 .661
304 274 185 .4000 .162 .155 .148 .141 .600 .640 .680
 

NF .904 FLAT TAPPET CAMS VL
=.016" 1.5:1

.020

duration

.050

duration

.200

duration

lobe

lift

104 106 108 110 1.5 1.6 1.7
274 247 164 .3727 .117 .110 .102 .095 .559 .596 .633
278 251 168 .3803 .125 .117 .110 .102 .570 .608 .646
282 255 172 .3879 .133 .125 .118 .110 .582 .620 .659
286 259 177 .3908 .141 .133 .126 .118 .587 .625 .664
290 263 181 .3980 .148 .141 .133 .126 .597 .637 .677
294 267 185 .4058 .157 .150 .142 .134 .609 .650 .690
298 271 188 .4134 .163 .155 .148 .140 .620 .662 703
304 277 193 .4265 .173 .165 .158 .150 .640 .683 .726

13 Comments

  1. I’ve heard that the Ultradyne cam w/ specs of 309′ duration and lift of .613″ on the intake and exhaust, is similar to a roller, but without the roller cam cost. Word has it, “This cam ramps up like a roller, but w/o the cost of a roller.”

    I’m planning a ~500 horse 413, bored .30″ over (~420 cubic inches) and it’s going into a 1966 Dodge Coronet 500, 4-door sedan. It’ll be standard weight, with a 727 beefed torque-flite with a ~2800 stall converter, running through a 389 case Chrysler 8 3/4 with a limited slip 3.55 to 1 gearing. The heads will be moderately to extensivly worked “906” castings with adjustable rockers. Static compression will be around 9.5 to 10.0 using older Jahns flat-top forged aluminum pistons w/ eyebrow fly cuts. I will start with an ~800 cfm Holley or a monified 750 cfm Carter AVS off of a 440. I’d like to try a dual quad set up after I get it running and use (2) 500 cfm “Competition Series” Carter AFBs – that I currently have. This vehicle will be for hot street use with an occasional drag strip appearance.

    Any and all comments/suggestions appreciated.

    Thank you, Richard

  2. Rich, that cam is too big for your engine. I ran that cam in my old 440 strictly for race use.It’s a good cam,but is really suited for race use. I would look at a smaller cam for your app. -rocky

  3. I have that cam in a 440 and it is too big for a street cam. Going to have to change it this winter.

  4. I have that cam in my 440, 10.5 to 1, pump gas, Edelbrock rpm heads, 1.875″ hooker headers, 4400 stall with 4.30 gears in a 3600 lb. Challenger street/strip car and run consistent 10.80’s@ 124 mph. It has good street manners and doesn’t load up. The motor dyno’ed at 585 hp/6200, 570 tq./ 4900. Love this cam!!

  5. I know I’ve said this twice before but if anyone reads this post and you have one of those Ultradyne 640 cams and its in good shape or still new in the box and you want to sell it please get in contact with me I’m extremely interested in it

  6. Ok so I am in need of help. I have contacted Bullet cams which took over Ultradyne. I have all the numbers on my cam but I’m being told there should be a R number , I don’t see any R number. Below is my cam info. Any help Identifing this cam would be great. BBC
    Master number 21/27
    314/322
    H7080
    278/286@50
    710/690
    I am needing lobe separation and RPM band and if this is a roller cam.
    Any info would be great.

  7. Gary, maybe you can check for the presence of lobe-taper?
    If present, then it’s not a roller cam.

    Mark West,
    I still have a new unused UD cam;
    NF57 – Ultradyne mechanical, 255 @ .050″ w/ .582″ valvelift
    I’ve had it installed in an engine once, only to remove it for a smaller cam before startup.
    Not sure if I want to get rid of it because it was an expensive cam for me to get over here (Europe).

  8. Thanks I have found what I needed by degreeing the cam shaft. I spoke to another person at Bullet that confirmed this cam is s Roller and that the H7080 is the serial number.

    Thanks.

  9. Though I do appreciate the offer there sir I am really looking for the ultradyne 640 cam so if anyone on here has one preferably brand-new unused or even if someone has the herb McCandless 324 650 lift cam I’d be interested in that too please contact me thanks and have a great day

  10. hi , would you recommend the Ultrdyne/Bullet 309dur-613 lift cam for a 505 Chrysler big block ? street strip , 5000 stall , 4.1 gears , 3700lb 68 Satellite
    thanks

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