Custom Grind or Off the Shelf

[wyrmrider]

i thought you talked with bullet and were witing to hear from racer brown???
I think i would lok at the 267 Crower not the 271
m79 do you have the .006 timing for those cams?
.050 is useless whe trying to finely slice the baloney
the grinders you mention use .006 9well maybe crower ses .005 I forget0
engle, racer brown, MP use .008 so convert to a comon number

 

[Aeronet]

215/70r15. About 26 1/2" tall. Might be closer to 27". 65 mph is ~2250 rpm. 2.76 gear.
I use mine as a daily driver so my perspective is skewed. My competition on the roads are modern vehicles and the big rigs.

 

[m79ded]

i thought you talked with bullet and were witing to hear from racer brown???
I think i would lok at the 267 Crower not the 271
m79 do you have the .006 timing for those cams?
.050 is useless whe trying to finely slice the baloney
the grinders you mention use .006 9well maybe crower ses .005 I forget0
engle, racer brown, MP use .008 so convert to a comon number

Sorry I do not have those timing numbers , I assume that Crower would be able to supply them

 

[LowDeck451]

i thought you talked with bullet and were witing to hear from racer brown???
I think i would lok at the 267 Crower not the 271
m79 do you have the .006 timing for those cams?
.050 is useless whe trying to finely slice the baloney
the grinders you mention use .006 9well maybe crower ses .005 I forget0
engle, racer brown, MP use .008 so convert to a comon number

I’ve only talked to Jim at racer so far, waiting to hear back. Said he’s swamped.

 

[wyrmrider]

thanks M79
the 262 Voodoo all I'm missing is the .200
Crower you mentioned is the 271 HDP 271-284 222-234 112LCA great cam in a 440 but IMHO likes 10:1 which is why I suggested 267HDP for the 9.7 383
If interested in Crower I's get ahold of Shaun at crower and ask him catalog says MTO made to Order
THe Howard- is that a shelf cam? In any case a 224-234 is 271-281 on the seat

The 262 Voodoo matches more closely with the 267HDP crower or the 265-273 218-226 502-525 Howard 110LCA cam

said he's swamped- the good guys always are

 

[LowDeck451]

No word from Jim yet.
I filled out a Howard’s cam req. sheet just for.... fun?...
286/[email protected] 233/[email protected] with .585/.585 lift
Lobe IDs 1HF233260LR Intake and 1HF239266LR Exhaust
.585 lift?!... I noted ‘stock valvetrain’ a couple times but I didn’t say stock stamped rocker arms, didn’t think I had to. Not discouraged yet though.
On constant I see is none of the custom cams are on 112, but almost all the shelf cams are. Maybe because most people build 440s I guess.

 

[Curiousyellow71]

BSB67.. he saw it coming in post #2
Lol
.

 

[PRHeads]

This thread is already going in about 10 directions, so I’m not going to add to the confusion.

I got a little chuckle out of this though......

I filled out a Howard’s cam req. sheet just for.... fun?...
286/[email protected] 233/[email protected] with .585/.585 lift
Lobe IDs 1HF233260LR Intake and 1HF239266LR Exhaust
.585 lift?!

Def some strange info on this one......

Looking at the their master list.....
Dissecting the numbers.....
1HF233260LR
Group 1
Hydraulic Flat
233 @.050
260 = lobe lift
LIft Rule

So, this is a square nose lift rule lobe with .260 lift.... or .390 at the valve with a 1.5 RR.
(Did they tell you .390 lift and you thought it was at the lobe?
Or did they tell you it was .585?
Cuz....... .585 with a 1.5RR is a .390 lobe)

The highest lift hydraulic flat lobes they have are the “HM” series, which would be .3566 lift(.5349 with 1.5RR)for a [email protected] lobe.

It looks like it’s another custom recommendation that makes me scratch my head.

 

[PRHeads]

From Russ’ post (#25)

A reasonably and logically chosen cam out of just about anyone's cam catalog will be better than the two custom cams that have been recommended.

Make that the 3 custom recommendations.

 

[LowDeck451]

BSB67.. he saw it coming in post #2
Lol
.

Yup, he sure did!

 

[LowDeck451]

This thread is already going in about 10 directions, so I’m not going to add to the confusion.

I got a little chuckle out of this though......


Def some strange info on this one......

Looking at the their master list.....
Dissecting the numbers.....
1HF233260LR
Group 1
Hydraulic Flat
233 @.050
260 = lobe lift
LIft Rule

So, this is a square nose lift rule lobe with .260 lift.... or .390 at the valve with a 1.5 RR.
(Did they tell you .390 lift and you thought it was at the lobe?
Or did they tell you it was .585?
Cuz....... .585 with a 1.5RR is a .390 lobe)

The highest lift hydraulic flat lobes they have are the “HM” series, which would be .3566 lift(.5349 with 1.5RR)for a [email protected] lobe.

It looks like it’s another custom recommendation that makes me scratch my head.

I see that I left out 110 lsa but yes .585/.585.
Thanks.

 

[PRHeads]

I had to ask.... because, well.... we've seen some real supposedly 'hitter' grinds from some of the best you mentioned on the Dyno.... Bullet, LSM, etc.,... sometimes even long after they've been swapped into Engines with absolutely GLOWING "seat of the pants' reviews from the Owners ?
Some are even quite comical ?
Especially when you have recorded 'baseline' runs on the Dyno for the Engine......
Buddy gets talked into.... purchases.... they swaps in the "magic" Camshaft..... runs it.... GLOWING results !!!!!!!!!!!!!!!!!
He then brings the Engine back to the Dyno.... we even Dyno'd FREE OF CHARGE ????????????? because obviously we were just as curious ?
Only to verify it was down 22hp and 31 Ft/Lbs on peaks with 'averages' across the curves similarly down 7 and 9 from his former OOTB Cam ?

This brings up an important point.

Sometimes....... how the car runs and drives is of higher importance than how much HP the motor makes.

Most of these milder/mid-level type street/strip builds will make more power on the dyno with a little bigger cam, on a tighter(rather than wider) lsa...... 106-108, instead of a more user friendly 110-114.

To that end, and as Bob put it..... about the “Glowing review”...... sometimes making the most power possible doesn’t provide the most rewarding driving experience.

Sometimes it’s a matter of trying to strike that elusive balance of having something that makes pretty good power for what it is, yet still ends up being street friendly enough to not discourage regular use.

In the cases where the owner was really happy with the “special” cam....... then Bob retested the motor, and it lost power......they were probably happier with it until they saw it made less power than the previous cam.

It’s not unusual in these types of builds, where in order to improve one area of operation...... you end up giving something up in a different area.
That’s how it usually turns out.

 

[PRHeads]

I see that I left out 110 lsa but yes .585/.585.
Thanks.

They told you .585?

It’s a .260 lift lobe..... so no, it’s nowhere near .585 lift.
Well, unless you have 2.25:1 rocker arms.

 

[LowDeck451]

They told you .585?

It’s a .260 lift lobe..... so no, it’s nowhere near .585 lift.
Well, unless you have 2.25:1 rocker arms.

View attachment 967318 View attachment 967331

Their email said .585/.585. Didn’t actually speak to him.

 

[PRHeads]

Their email said .585/.585. Didn’t actually speak to him.

I posted the data from their lobe sheets above....... it’s pretty clear the lobe numbers they gave you have .260 and .267 lobe lift....... which is .390/.400 at the valve with a 1.5RR.

Those are lift rule cheater lobes for a SBC, where that’s what the stock lift is..... .390/.410.

You may want to have them review your combo, and their recommendation again.

I’m pretty sure you’ll get a different answer/recommendation.
Someone just plain screwed up on that one.

 

[451Mopar]

Just from what I have used, the Crower Compu-Pro 271 (222 intake duration) in a mild 383 might be OK with the 2,500 stall converter, but my engine had mild ported 906 heads. Not sure how much that matters with these mild cams. I was never really happy with that cam, but at the time, I did not know my carb was messed up.
A few years ago, I put a Hughes SEH16/20 cam in my 360. I know, different type of engine, but it was around 9.5:1 compression, mild ported heads, and 1.6:1 crane rockers, and just a standard performer dual plan intake. All in an '83 RamCharger 4x4 with 3.23:1 gear and stock HS converter. That engine runs way better than I thought it would.
I know this is a high rate cam, but I did not have any valve train issues, but also aftermarket rockers.

I think when you start talking high 220's 230's intake duration, you really need a high stall converter.

 

[LowDeck451]

Just spoke with Jim at RB. His rec...
Lobe# EH20 264 adv. 220 @.050 intake and exhaust .450 lift
110 lsa 3 degrees adv. - 107icl.
He said with my .040 quench, 91 octane, 9.7 comp. - not a problem.

 

[LowDeck451]

I posted the data from their lobe sheets above....... it’s pretty clear the lobe numbers they gave you have .260 and .267 lobe lift....... which is .390/.400 at the valve with a 1.5RR.

Those are lift rule cheater lobes for a SBC, where that’s what the stock lift is..... .390/.410.

You may want to have them review your combo, and their recommendation again.

I’m pretty sure you’ll get a different answer/recommendation.
Someone just plain screwed up on that one.

I see, wow. Yeah I’ll do that. Thanks

 

[LowDeck451]

Just from what I have used, the Crower Compu-Pro 271 (222 intake duration) in a mild 383 might be OK with the 2,500 stall converter, but my engine had mild ported 906 heads. Not sure how much that matters with these mild cams. I was never really happy with that cam, but at the time, I did not know my carb was messed up.
A few years ago, I put a Hughes SEH16/20 cam in my 360. I know, different type of engine, but it was around 9.5:1 compression, mild ported heads, and 1.6:1 crane rockers, and just a standard performer dual plan intake. All in an '83 RamCharger 4x4 with 3.23:1 gear and stock HS converter. That engine runs way better than I thought it would.
I know this is a high rate cam, but I did not have any valve train issues, but also aftermarket rockers.

I think when you start talking high 220's 230's intake duration, you really need a high stall converter.

Interesting. Jim’s cam seems pretty conservative compared to the others, but he said it has really good torque and power, pretty fast rate, but easy on the valvetrain. Sounds good to me I guess.

 

[PRHeads]

For those keeping score:

Jones-
208/216-108
.448/.457

Bullet-
230/234-108
.488/.503

Howard’s-*
233/239-110
.390/.400

Racer Brown-
220/220-110
.450/.450

*Howards cam recommendation likely to be revised