what's the labor charge on something like this. I know the cost of the new springs and cams, and Jim said it was two day job, just wondering what the labor was if you dont mind me asking. I may want to do this in the future. email me you don't mind.

also does putting a larger cam in the truck hurt any of the low RPM torque?

 

Are these pretty much only an option for built blocks?

I'd really love to have that lopey sound, but a built block just isn't in the works for me right now.

J.D. said the Stage 2 is borderline as far as streetable goes. How is the stage 1 for streetable/daily driven use? Is the stage 1 lopey at all?

Do you need to run a chip with these cams?

Also, what was the price on those? Crower didnt appear to have prices on the site.

These are questions for pretty much anyone who wants to chime in.

 

there was a thread on cams a while back, I asked Jim the same questions, he said the cams on stock truck would make between 20 and 30 hp, they had a special grind for stockish vehicles without high boost and ported heads, the cams were about $700 and the higher tension valve springs needed to install were another $300. he also said the labor was a two day job, I'm not ready to get this done($$$) so I haven't asked them the total cost with labor yet.

 

With the Stage 2's, the Autometer guage says I am pulling 13 in. of vacuum at idle in Park/Nuetral and pulling 9 in. vacuum at idle in drive. Cruising up around 70-75mph, I can still pull around 5-10 in. of vacuum, but a slight hill will boost up a pound or two.
Not bad at all really for the street. I thought it may have been worse.

Don't know what it does without cams.



P.S. I said it once and I will say it again, these cams are badder then a mug. Forget about putting a full open lid drink in your cup holder.

 

just got my crowers in ... man, that's the sound of power. Coupled with a MAC exhaust its something for sure!

My idle though is quite smooth, relatively speaking. My installer spent some time tweaking an included IAC spacer/adjuster. Before the adjustments it was wild, but afterwards it smoothed out to the point where you hear the cams, but really dont feel them.

 

is your truck basically stock, or do you have a built block? did you feel a big difference with the cams? how much did it set you back? I would appreciate any info you can give, I was thinking about doing the cams, shoot me an email

 

how about 6 inch of vacuum in park?neutral & 0 inch of vacuum in drive even with the iac valve plate the truck have a nasty idle definitely you can't have an open container inside the cab

 

Heres the short answer. Think of vacuum as 'air that doesn't get into the cylinder.' You get maximum vacuum at idle, because you purposely stick a large obstruction - the throttle blades - in the path of the incoming air to "lose" some pressure, and reduce the density of the air in the cylinder.... lower pressure = less air to burn less fuel. 'cause that's all the air and fuel that is needed to keep the engine icling.

When the intake and exhaust valves are open at the same time, you have the outside air pressure trying to push the air into the cylinder and the exhaust manifold back pressure (which is generally greater than atospheric pressure) trying to force the exhaust gasses back through the open exhaust valve. Obviously, with any overlap at all, there is the possibility that incoming air can pass through the cylinder due to its momentum and out the exhaust, or that exhaust gasses can be forced into the cylinder to mix with the incoming air, and raising the pressure in the cylinder = less vacuum.

I would expect it would take an extremly large amount of overlap to actually force exhaust gasses back through the intake runner and mix with the gasses in the plenum.... but I'll leave that up to the guys that build race engines with these radical cams. In any case, the vacuum in the intake is going to be less because "pressure" is leaking into the cylinders through the exhaust system. The dropping piston is pulling some of the "fill" from the exhaust and less from the intake runner.

 

what you guys think about the stage 5 crower in a stock motor w/ springs part number CRO62805-2

 

eight years ago when this was the place to be for Lightning/Harely truck info



they'd have asked you how you use your truck and what mods you have...

 

[QUOTE=tarajerame;4483902] eight years ago when this was the place to be for Lightning/Harely truck info

QUOTE]

Soooo true....