383 street cam help

[lewtot184]

My Bob K cam was ground by Engle with Bob K' s specs. Don't know if Bob K changed vendors since 2008 when I bought mine?

you ever run a degree wheel on that cam?

 

[Sweet5ltr]

To be honest, there probably isn't a 5-15 horsepower / torque difference between the worst and best .480-.500 street grinds on the market. Andy's article points out how 'little' we actually know about how camshafts can positively or negatively effect engine performance.

AndyF's 'Lobe-ology' article;
http://web.archive.org/web/20060512...Community/Articles/Details.asp?ID=-1849542054

 

[lewtot184]

To be honest, there probably isn't a 5-15 horsepower / torque difference between the worst and best .480-.500 street grinds on the market. Andy's article points out how 'little' we actually know about how camshafts can positively or negatively effect engine performance.

AndyF's 'Lobe-ology' article;
http://web.archive.org/web/20060512...Community/Articles/Details.asp?ID=-1849542054

I don't think there's big number differences. generally people don't really know what they have but if it feels good it's "got to be the best". track times will tell the story.

 

[Bighead440]

https://www.summitracing.com/ga/parts/crn-683942/overview/make/dodge

THIS^^cam works awesome with all stock components, but some new valvesprings would be nice. Authoritative idle, plenty of vacuum, no stall converter needed, 2.94-up gears would be nice. Proven in 383's countless times. The .455 Pupleshaft is similar, as others have suggested, but I like dual pattern cams. If you have enough compression, factory 11" converter and 3.23-up gears, the Comp DEH275 works awesome, with a choppy idle but decent vacuum and pulls right off idle.

https://www.summitracing.com/ga/parts/cca-cl21-406-4/overview/make/dodge

 

[YY1]

With a "street cam", don't you want your power band to start pretty close to "idle".

I personally wouldn't go much over a 1200 RPM start of the band.

...and don't you also want a wide band?

Some of the ones I see listed on this thread don't start till 2500.
That's borderline highway cruise RPM for most "street" cars.

 

[lewtot184]

https://www.summitracing.com/ga/parts/crn-683942/overview/make/dodge

THIS^^cam works awesome with all stock components, but some new valvesprings would be nice. Authoritative idle, plenty of vacuum, no stall converter needed, 2.94-up gears would be nice. Proven in 383's countless times. The .455 Pupleshaft is similar, as others have suggested, but I like dual pattern cams. If you have enough compression, factory 11" converter and 3.23-up gears, the Comp DEH275 works awesome, with a choppy idle but decent vacuum and pulls right off idle.

https://www.summitracing.com/ga/parts/cca-cl21-406-4/overview/make/dodge

that crane cam would be a good 383 cam. didn't know it was still being made. the HMV278 would be good for a 440, don't know if it can be bought anymore.

 

[wyrmrider]

another pair of old school crane and comp cams
you want that duration/ lift combination get an Elgin and save $100
area under the curve sucks

 

[wyrmrider]

I took a look at the comp cams in the Andy F article
both are older chevy profiles on the intakes
take another look at the article- still a good read
note the Intensity compared to newer profiles

XTQ solids for chevy .842 lifter MI 28.8 (13.8/15.0)

6261 .566 ..531 .354 278HTQ 248 160 11”vac 195psi cranking

6262 .576 ..540 .360 282HTQ 252 164 8”vac 190psi cranking
down 25 ft lbs from 528 Purple shaft

On the Racer Brown - the ST 14 had 236 @.050 but not nearly that lift that “236”
Racer Brown may have had a Mopar lobe
we ran his cam or the .904 isky cam in the 63 Superstocker I'd like to think that Isky developed his ONLY .904 cam for us but we did test it exhaustively, (as well as dome shapes- stock was too much)

http://www.4secondsflat.com/RB Cam Specs.htm Racer Brown Cam Specs

You can do much better in solid cam selections today
230@ 50 with a .500 lift
238 to @50 with 550 lift
240 @50 530 and easy on the valvetrain

 

[CompSyn]

you ever run a degree wheel on that cam?

No. Haven't built the engine yet.

 

[lewtot184]

No. Haven't built the engine yet.

if you can run it thru a wheel and tell us what you have.

 

[wyrmrider]

Evidently Comp has no .904 lifter solid masters except for Top Fuel

 

[rumblefish360]

Not many places have a dedicated series of lobes (to take FULL advantage) for the .904.

It isn’t really necessary.

 

[YY1]

Isn't it comp that has a whole page on their site, explaining what a .904 lifter is?

 

[lewtot184]

BBchevy guys are into the .904 lifter thing.

 

[rumblefish360]

Of course they are! They know a good thing when they see it! Just like the Jesel rocker arm conversion packages designed to move away from stock Chevy garbage to a MoPar like rocker arm system on a bar.

 

[lewtot184]

pretty sure comps MM series are .904 tappet.

 

[wyrmrider]

you got a Top fueler - go for one
"CHRYSLER SPECIAL SOLIDS These lobes are for use only in Chrysler Corporation engines with .904" tappet diameter. The "Specials" are to be used in 426c.i. or larger engines. Developed for the Top Fuel drag racing program, these designs offer excellent torque and horsepower."

We used ENGLE or Chet Herbert
back in the day ERSON did a lot of no name copies with other peoples stickers on their cars

 

[YY1]

I thought it was the XE line that was touting "designed for the Mopar .904 lifter..."

 

[lewtot184]

I thought it was the XE line that was touting "designed for the Mopar .904 lifter..."

the HL line is .904.

 

[Bighead440]

another pair of old school crane and comp cams
you want that duration/ lift combination get an Elgin and save $100
area under the curve sucks

Neither of these grinds are available from Elgin. The OP sounds like he wants a reliable camshaft with few modifications for a basically stock engine. Not a IR flank roller camshaft. I see people on forums bitching about wiped lobes, rpm issues, valvetrain noise, etc-etc. because they have a stock to mild engine with an "extreme" this-or-that "area" cam. There is a place for proven parts, and then there's cutting-edge parts with many support items that the average guy may not have or be willing to buy.