Cam and nitrous

I currently have this solid flat cam in my 523 @ ~ 9.7:1 compression:

237/255 @.050
.579/.597 lift
107 lsa
103 intake center line


Timing events @ .050:   Int- 15.5/41.5.  Ex- 58.5/16.5


How is this cam going to respond to a 2-300 hit?


Thanks,
Jon

pretty damn small for that much imo, 100-150 no problem.

richter69 wrote:pretty damn small for that much imo, 100-150 no problem.

x2

So is it just mainly a duration thing?  Will it be more detonation prone, or hold too much heat in the combustion chamber w/ the 255 on the exhaust?  How about the lobe sep... Would it be better to be wider like 113/114 or is the 107 better for the spray?

What type heads is on this engine?

you'll waste fuel and nitrous. the motor cannot use it all. you probably will not speed up after a 150-175 hit.

It's got a set of dove heads w/ 2.2" intake valves that have been cleaned up a little...They flowed 310/190 @.600....  

What ballpark duration would it need to not be wasting "gas and nitrous" w/ a 300 shot?

I bought one of Steve Johnson's plate kits and would like to hit it with more than the starter tune!

I feel you will be limited to an 82 jet from my experience.

460bronco wrote:So is it just mainly a duration thing?  Will it be more detonation prone, or hold too much heat in the combustion chamber w/ the 255 on the exhaust?  How about the lobe sep... Would it be better to be wider like 113/114 or is the 107 better for the spray?

I am thinking with the 107LS, detonatin should not be to bad, but you will be wasting some out the exhaust. I agree an .82 N jet would be worth a shot and thats about 200HP on most jet charts. Don't think the 300 will help much, but I would run some Race gas and bump the timing back even more. With 9.7/1 compression I would run race gas for the even at 200HP N20 shots, to be safe.  Don't mess up you new engine with the juice, and blow up the trans either. I would not be geting spray happy in a boggin truck, unless you like breaking all kind of parts either.

I have a stand alone fuel system for the nitrous plate that will use VP C16 fuel.  This is the set-up that steve johnson suggested.  
I also have a programmable digital 6 AL ignition box.  When you apply 12 volts to the pink wire it automatically removes the set amount of timing.  This function is connected to my wide open throttle switch, so, I don't have to physically move the distributor when I run the spray.  The amount of retard is adjusted via laptop!  Actually my whole timing advance curve is adjusted on the laptop and the distributor is locked out.

I only plan on running the spray every once in a while with my cut tires.


I guess to do a 300 shot right I need 300 @.05 and fully ported A heads.....wonder what combo you would need to spray 600hp out of his "sledgehammer" kit?

If you want to spray that much you should get with Steve Johnson and have his guy grind you up a cam. It will likely dog it on motor though especially with relatively low compression. A 200 hit with his plate and tune up will feel damn good trust me. I picked up 1.5 in the 1/4 with square jets with my old ported d0ve combo in a 4200 truck. You should have no issues on pump gas either as long as you pull a lot of timing out.

Like what was stated above, I think you will be quite impressed with a 200 shot if you have not felt one before. The way I see it even if pump gas would be ok, and since you are not planning to spray it much, until you get addicted to the dope, the race gas adds a little safety margin, and a little more timing can be added to make more power. It should clean the mud off the tires real quick when you push the botton!