Cam and nitrous

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Cam and nitrous

Post  460bronco on March 30th 2014, 8:15 am

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
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Re: Cam and nitrous

Post  richter69 on March 30th 2014, 11:02 am

pretty damn small for that much imo, 100-150 no problem.
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Re: Cam and nitrous

Post  bigjohn2007 on March 30th 2014, 1:58 pm

richter69 wrote:pretty damn small for that much imo, 100-150 no problem.
x2
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Re: Cam and nitrous

Post  460bronco on April 2nd 2014, 7:20 am

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?
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Re: Cam and nitrous

Post  bigjohn2007 on April 2nd 2014, 4:36 pm

What type heads is on this engine?
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Re: Cam and nitrous

Post  whatbumper on April 2nd 2014, 7:20 pm

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

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Re: Cam and nitrous

Post  460bronco on April 2nd 2014, 10:10 pm

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!
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Re: Cam and nitrous

Post  tfsbbf466 on April 2nd 2014, 10:20 pm

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

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Re: Cam and nitrous

Post  supervel45 on April 3rd 2014, 12:39 am

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.

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Re: Cam and nitrous

Post  460bronco on April 3rd 2014, 7:45 am

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?
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Re: Cam and nitrous

Post  tfsbbf466 on April 3rd 2014, 9:52 am

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.

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Re: Cam and nitrous

Post  supervel45 on April 4th 2014, 3:57 am

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! Very Happy 

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