i got some info from REED Cams today. any thoughts?

[denny411]

This cam suggestion is for a 383 sbc,w/ dart sportsmanII angle plug heads, 202/165 and 200cc runners.10.5:1 compression Kieth Black hyper pistons,and 5.7 rods.

I`m using an Edelbrock Victor jr intake with a 750dp holly carb

Headers will be long tubes with 1 3/4" primaries, 3 1/2" collectors, and 3" dual pipes.

I`m using a 200R4 trans with stall converter, Have 3:55 gears and 24.5" tall tires.

The recommendation was also based on a 2700lb car.

 

TM-HR HYDRAULIC ROLLER SERIES .700" roller diameter

The TM-HR Hydraulic Roller Series profiles are designed to be compatible with today's sophisticated engine applications. There are a variety of hydraulic roller lifter profiles to choose from, depending on one's specific application and desired performance.

adv@ [Duration lobe lift point] lobe [lift w/ rocker ratio]

Grind # .006" .050" .100" .200" .300" LIFT 1.5 1.6

-------------------------------------------------------------------------------------

int/TM286HR 286 234 202 145 74 . 340" .510" .544"

exh/TM290HR 290 238 205 148 76 .340" .510" .544"

 

This is a dual pattern cam, supposed to produce good power from 2200 to 6500rpm with a relatively flat torque curve.

 

I didn`t get any hp/tq #`s from them, and would really appreciate it if someone here who is knowledgable with desk top dyno could run this and see what it should do.

 

Here`s a link to the grind#`s if you have trouble deciphering my chicken scratches http://www.reedcams.com/Cat/hyd_roller_profiles.htm#Anchor-H-R-47383

[grumpyvette]

you did not state the LSA its ground on, that makes a huge differance

but assuming a 112 LSA youll get about 438hp/470tq acording to my computers wild guess which is about perfect for your gearing to have lots of fun, don,t get hung up on what you might think is low hp, computers only see TRENDS not DYNO NUMBERS , that cam looks about ideal on the street,

[pparaska]

Isn't that roller TM286HR (286@.006", 234@.050, 145@.200") intake lobe pretty slow for a roller?

 

The Comp Cams XR288HR (I believe it uses the Comp lobe # 3316, on page 230 of the catalog: http://www.compcams.com/catalog/230.html ) is 288@.006, 236@.050, 157@.200)

 

That Reed roller seems as lazy as a hyd flat tappet lobe:

(Comp lobe # 5447, on page 228: http://www.compcams.com/catalog/228.html ):

288@.006, 244@.050, 157@.200)

 

Note the .200" duration of those three lobes. The Reed roller is the lowest.

 

??? I dunno. If I were running a roller, I'd want the .200" duration to be BETTER than a flat tappet cam, no?

[denny411]

 

The Comp Cams XR288HR (I believe it uses the Comp lobe # 3316, on page 230 of the catalog: http://www.compcams.com/catalog/230.html ) is 288@.006, 236@.050, 157@.200

 

Pete is this the Cam you are running?

 

Grumpyvette, What kind of #`s could i expect from this cam?

I do have a 2800 stall converter already if need be.

[grumpyvette]

458hp/460tq is the computers guess

[denny411]

Thanks alot guys. I`ll call comp cams sometime this week.

 

One more thing, Is it acceptable to run solid roller lifters on a hydraulic roller cam? or is there something specifically different with the grind?

[pparaska]

No, I'm running the 12-677-4 solid flat tappet in my 327.

 

With grumpyvette's advice, I'll be running the Crane 114681 solid flat tappet in my 406.

 

I just thought it was strange that a similar adv and .050 duration roller cam had so much less .200" duration than the Comp hyd. roller. I thought .200" and above was where rollers ruled? I guess you'd really need the .300, .400, .500, etc. durations to really be able to tell what's up.

 

Call Crane as well. A few people have told me that Comp's tech line is not as good as it used to be, but that's hearsay.