camshaft enquiry form

[mtnrat]

Has anyone ever filled out the camshaft enquiry form on either crane cams or comps cams website. I got a response back from crane today. I told them 18 foot V hull weighing in at 2400 lbs. Stock chev 350 4bbl. I told them that I was going to add vortec heads at the same time as well as convert to full hydraulic cam, & rockers. I wanted a good idle and it to work well from idle to 5000rpm. They reccomended cam part #119831. here is the spec sheet;
Part Number: 119831 Grind Number: HR-284-2S-12 IG
Engine Identification:
Start Yr. End Yr. Make Cyl Description
1957 1987 CHEVROLET 8 FAIR IDLE, MODERATE PERFORMANCE USAGE, GOOD MID-RANGE HP, MILD BRACKET RACING, AUTO TRANS W/2500+ CONVERTER, 3000-3800 CRUISE RPM, 9.5 TO 10.75 COMPRESSION RATIO ADVISED. BASIC RPM 2500-6000
Engine Size Configuration
262-400 C.I. V
Valve Setting: Intake .000 Exhaust .000 HOT
Lift: Intake @Cam 339 @Valve 509 All Lifts are based
on zero lash and theoretical rocker arm ratios.
Exhaust @ Cam 352 @Valve 528
Rocker Arm Ratio 1.50
Cam Timing: TAPPET @.004
Lift: Opens Closes ADV Duration
Intake 31.0 BTDC 73.0 ABDC 284.0 °
Exhaust 79.0 BBDC 33.0 ATDC 292.0 °
Spring Requirements: Triple Dual Outer Inner
Part Number 99838
Loads Closed 112 LBS @ 1.650 or 1 21/32
Open 313 LBS @ 1.150

Recommended RPM range with matching components
Minimum RPM 2000
Maximum RPM 6200
Valve Float 6500
Cam Timing: TAPPET @.050
Lift: Opens Closes Max Lift Duration
Intake 4.0 BTDC 38.0 ABDC 107 222.0 °
Exhaust 52.0 BBDC (2.0) BTDC 117 230.0 °
Remarks:

Seems they may have missed the boat:/ What do you guys think.

 

[f_inscreenname]

Re: camshaft enquiry form

You probably have a 260/273 to start with so it not that bad. It would be a lot better if you did some work to the bottom end. You will be lucky to have 9 to 1 compression with those stock pistons. Put some flat tops in there and it would come alive. With out them..... hummmm.......

 

[calwldlif]

Re: camshaft enquiry form

I agree with you..............
they missed the boat.
I think there is a better Hydro Roller cam.
Stall converter to 2500 rpm(auto trans) kinda
misses the hole shot don't it.
It will run strong after that.......................

 

[mtnrat]

Re: camshaft enquiry form

I have alot of time and some money to spend this winter and I want to add some hp to my stock engine. The first thing I am going to get is some vortec heads. I also want to go to a hydraulic roller cam and self aligning roller rocker arms. I am not looking for maximum hp, but something around 300-325 would be nice. I want something tractable with a good holeshot for skiing and some top end for fun. With the setup I have now the holeshot is pretty good with wot at about 50. I have been reading everything I can on cams (still know little), and the one recommended seemed out of place for what I want. Anyone done what I want to, or have some suggestions.

 

[John_S]

Re: camshaft enquiry form

I am assuming you have an '86 or older engine and want roller lifters. From Dennis Moore's book, look at Crane #119611 (HR-260-2-12IG). He indicates 15-20hp increase over stock. It does require aftermarket roller lifters, pushrods, camshaft thrust botton, and hardened tipfuel pump pushrod.

Also mentions a Crane #119621 (HR=276-2S=12IG) for 25-30hp, but requires stronger valve springs.

 

[mtnrat]

Re: camshaft enquiry form

Thanks John, That is what I think I am looking for. I do know that since I have a pre 87 block I will need to do all of that and MOORE d . I really wish i could get a copy somehow of his book. I am leaning toward the second level with stronger valve springs. Does he mention which ones?

 

[mkast]

Re: camshaft enquiry form

The valve springs needed for any cam will be listed with the cam specs.

 

[Bondo]

Re: camshaft enquiry form

" I wanted a good idle and it to work well from idle to 5000rpm."

"Recommended RPM range with matching components
Minimum RPM 2000
Maximum RPM 6200"


Ayuh,............ Totally Missed the Boat,.......... And your parameters................

 

[xtraham]

Re: camshaft enquiry form

292 duration and 9:1 compression will be far from a smoth idle

 

[Silvertip]

Re: camshaft enquiry form

Mid range and upper end horsepower always comes at the cost of low end power. Since a boat has no transmission, low end grunt is essential. As everyone is indicating, a cam with 2000 rpm lower limit will not cut it. You are looking for something more like a truck cam profile.

 

[John_S]

Re: camshaft enquiry form

Dennis didn't say in that cam recomendation, but mfast is correct. He does talk valve springs in another chapter. I agree, they should do another printing of the book. Seems like there would be enough demand.

Personally, I would not go to that cam. If your flat based mercruiser cam is fine, might even stay with that. The first crane I mentioned, along with the vortec heads, intake and 4brl are going to get your 300hp requirement.

 

[mtnrat]

Re: camshaft enquiry form

Can't find the second cam. The first will get me what I need and provide good manners. I sent an inquiry to comp cams as well, but so far no reply.

 

[xtraham]

Re: camshaft enquiry form

280ah from comp cams is a good all around performer, the 260 is good for all out torque and midrange power and will still turn 5000

 

[f_inscreenname]

Re: camshaft enquiry form

I like the 280 myself but again IMHO without the pistons you are not going to get the bang for the buck you are looking for. and for the money you would be crazy not to. Here for 179 bucks....http://www.naparts.com/ProductModelDetail.cfm?ProductModelId=712

 

[mtnrat]

Re: camshaft enquiry form

I see the 179.00 but what is that for. Hard for me to tell

 

[John_S]

Re: camshaft enquiry form

I mis-spoke on the springs for the crane #119621 cam. Dennis does give part numbers. Crane: 99846 and Chevy: 10134358. I'd still recheck with cam makers recommendation.

 

[Reinellchris]

Re: camshaft enquiry form

not sure if i'm off subject here but i've been told at a boat show if you have wet exaust you can't put too much duration in your cam as the engine will inhale water

 

[f_inscreenname]

Re: camshaft enquiry form

179.00 is for a master kit. Try this http://www.naparts.com/ProductModelDetail.cfm?ProductModelId=712

If you cant click on the address then put it in your address box and go to it.
Also if you are doing all that you should get matching valve springs.
As for being to big and will suck up water. He is no even close to doing that even with the other one. You just have to watch the overlap when running big cams in boats.

 

[mtnrat]

Re: camshaft enquiry form

This is the stuff for 179.00?

Chevy 350 81-85 - Master Kit

Price:
$179.99

INCLUDES
# Hastings Rings
# Federal Mogul Dish Pistons
# Federal Mogul Seal Power Rod Brgs
# Federal Mogul Seal Power Main Brgs
# Federal Mogul Cam Brgs
# Melling Oil Pump
# Federal Mogul Camshaft
# Federal Mogul Lifters
# Melling Timing Components
# Pioneer Frost Plugs
# Victor Gaskets

That is way too much stuff for $179 me thinks. so I figure it is just a poorly designed page or I am just a little slow d .

 

[mtnrat]

Re: camshaft enquiry form

Wait I think I get it.
It is for this:
Required Options:
*Main Brgs:
*Pistons:
*Rings:
*Rod Brgs:
8)