how much nitrous did you shoot at your 306cc cam? Will 200-250 be to much since....
06-02-2010, 07:28 PM
#1
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how much nitrous did you shoot at your 306cc cam? Will 200-250 be to much since.... How much nitrous did you guys shoot at your 306 cam? I'm thinking about going direct port that way the distribution will be even and I'm hoping this will allow me to shoot a 200-250 shot of nitrous even if this cam does have a little to much overlap.
So does this cam have to much overlap for that size shot even if I use a direct port setup? Check my theory below.
My theory behind this is since a single nozzle setup can send alot of nitrous in certain cylinders and not in others, it can not only cause a lean situation in those cylinders but alot of the extra nitrous in these cylinders are now being shot out of the exhaust valve since there was to much in that cylinder. But by evenly distributing the nitrous I can now keep from having to much nitrous going in just a certain number of cylinders and spread it evenly that way the overlap of the cam won't affect the nitrous as much.
So does this cam have to much overlap for that size shot even if I use a direct port setup? Check my theory below.
My theory behind this is since a single nozzle setup can send alot of nitrous in certain cylinders and not in others, it can not only cause a lean situation in those cylinders but alot of the extra nitrous in these cylinders are now being shot out of the exhaust valve since there was to much in that cylinder. But by evenly distributing the nitrous I can now keep from having to much nitrous going in just a certain number of cylinders and spread it evenly that way the overlap of the cam won't affect the nitrous as much.
06-02-2010, 08:16 PM
#3
A plate (Nitro Daves comes to mind) on a stock intake will distribute fairly evenly up to the 250 range IMO.
Beyond that, Direct port is a good idea but like Rob said it really pays to know or have someone who has experience with it.
The whole overlap and nitrous thing is probably a little too overthough. If it was a boosted car that needed to spool up on the bottom and remain pressurized in the cylinders, then it would be a lot bigger deal.
Yes designing a cam specifically for nitrous can have gains, while on the nitrous, but in this situation I cant see where it would gain you very much.
Beyond that, Direct port is a good idea but like Rob said it really pays to know or have someone who has experience with it.
The whole overlap and nitrous thing is probably a little too overthough. If it was a boosted car that needed to spool up on the bottom and remain pressurized in the cylinders, then it would be a lot bigger deal.
Yes designing a cam specifically for nitrous can have gains, while on the nitrous, but in this situation I cant see where it would gain you very much.
06-02-2010, 08:17 PM
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Interesting I have heard of several people using 100 to 150 shot of nitrous with the 306 cam. But I am afraid 200-250 is to much due to the cam's overlap. And was wondering if a direct port would help with that and I explained why I thought that. A better way to tell me I was wrong is by explaining why I was wrong and not by sounding like a DICK! I still don't see why you think a 100 shot is to much for this cam.
06-02-2010, 08:22 PM
#5
He didnt say a 100 shot was too much for the cam, he said 100 shot is too much "if you dont know what you're doing".
To me that goes for any engine.
In short, no a 200 - 250 shot done properly is not too much for the cam. In my opinion.
At that level overlap is way down on the list of things to worry about. It needs to be set up properly and the tune NAILED by someone who has experience spraying that much, or it will just be carnage.
Then if you want to start chasing tenths, you could do a cam swap. Like I said it's not going to make as big a difference as you think on a nitrous engine. On a boosted engine the loss / gain can be much more.
To me that goes for any engine.
In short, no a 200 - 250 shot done properly is not too much for the cam. In my opinion.
At that level overlap is way down on the list of things to worry about. It needs to be set up properly and the tune NAILED by someone who has experience spraying that much, or it will just be carnage.
Then if you want to start chasing tenths, you could do a cam swap. Like I said it's not going to make as big a difference as you think on a nitrous engine. On a boosted engine the loss / gain can be much more.
06-02-2010, 08:29 PM
#6
True, you can easily put a 200 shot on that engine with the cam and still make damn good power. But do you know what your doing to properly retard timing? How about is your engine capable of making the power but NOT blowing up. HOw is the rest of your setup? Do you have any nitrous experience besides of what you hear?
06-02-2010, 09:51 PM
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True, you can easily put a 200 shot on that engine with the cam and still make damn good power. But do you know what your doing to properly retard timing? How about is your engine capable of making the power but NOT blowing up. HOw is the rest of your setup? Do you have any nitrous experience besides of what you hear?
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06-02-2010, 09:56 PM
#8
I have a bigger cam than that and let me tell you if you heard that your wrong!!!! You will be fine if you know what your doing and if your tuner is GOOD he will tell you what it can handle. Id say throw 200 at it all day long.
06-02-2010, 10:02 PM
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No, a lean safety switch. I forget the name of the company right now, but you can set it at whatever air/fuel ratio that you want the nitrous to shutoff at. There are lots of options with it. I decided to use this instead of the Fuel pressure safety switch because I heard of people having issues with them.
06-02-2010, 11:39 PM
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My old setup was a 383 with the CC306 and a 200 shot on a Nitrous Outlet plate and it was fine. High 10's and low 130 MPH traps on drag radials. Crappy 60' of course, LOL. That cam seems to like nitrous.
06-03-2010, 05:24 AM
#16
Why is everyone afraid of overlap? Overlap makes power! And really with 13 degrees @.050 the cc306 doesn't have very much overlap. at the 250 hp level of nitrous, basically no point in sacrificing the NA performance for the gain while spraying. Nitrous loves two things, and that's DURATION and COMPRESSION. Look at your "typical" dedicated nitrous cam... Wide split, wide lsa. Think about what that does to the valve events and why.......
06-03-2010, 10:39 AM
#17
NOt to sound like a ***, but hell high 10s can be had with a similar cam and a 200 shot on a BONE stock longblock. So as long as your pistons can handle 200+ shot, id say duzit.
06-03-2010, 06:42 PM
#19
Well I guess I sounded like a ***, but I dont mean to. Hell I was trapping 126 in my car with the above statement of what I had in my car. Only difference my car 60ft like a bad out of hell and its a A4. SOrry if I sounded like a dick 
06-03-2010, 09:15 PM
#20
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a 200-250 shot is not a big shot for a fully forged motor. the cc306 is also not too big by any means.
lean safety switch??? who is selling that thing... and do they sell a rich safety switch? how about a detonation safety switch?
LMAO!
lean safety switch??? who is selling that thing... and do they sell a rich safety switch? how about a detonation safety switch?
LMAO!