What c.i is your motor and comp ratio and what kind of power and E.T's
thanks for any comments

Im currently rebuilding my 355, 6"rods JE 13. 1 to 1 pistons and and Eagle forged 4340 3.48 (stock) stroke crank, O-ring block and heads, Ported LT1 head castings etc...

Im just wondering if the Comp 306 w/ 112lsa cam will be a nice juice cam. I plan on starting with 150 wet shot and working my way up to a 200 then 275 and maybe a 300 if the tunning goes right.

 

Thats a little girls cam if you are running 13:1 compression . You need to go A LOT bigger.

 

What cam would you recommend? Solid roller .700lift ? I was just wondering how good the 306 cam will work with my motor. The CR will be any where from 12 to 13 to 1 just what ever piston is avalible.

 

I assume you are staying fuel injected?

With that wide of a lobe separation, that little duration and that much compression you will have to run some killer race gas /timing retard naturally aspirated to keep from detonating, I dont want to think about the added cylinder pressure of nitrous...

Some general specs I would go with if you are serious about going fast (I assume you are if you are wanting 12-13:1 compression right?):

Wide LSA for the nitrous and for your fuel injection: no less than 112, it will make the larger camshafts seem more streetable as well

If you are running 13:1 compression:
I would run a solid roller camshaft somewhere around:
255/268@.050, .650'ish lift

If you are a running 12:1 compression, I would look for a camshaft somewhere around 245/258@.050 and probably similar lift.

Let us know what your goals are and we can better recommend a camshaft for you.

 

sounds like a sweet motor dude! but what about the cc306 on a stock bottom end and ported heads? im looking into this combo and would possiby spray on the stock bottom, and then rebuild and spray a ton more. when i rebuild i will get rid of the cc306 though so i can put in more of a nitrous cam. so what do u think about 306 and nitrous as compaired to a more nitrous specific cam? thanks

 

The cc306 is a great nitrous cam because it is ground on a wide lobe separation and has quite a bit (13* off the top of my head, maybe i am wrong) more duration @.050 on the exhaust side than on the intake, which is what the author of building budget small block chevy's recommends for a nitrous cam.

 

So the 306 will work good for N20. If so I am looking to run a dry 150 shot on stock bottom end with this cam. I have a question about injectors? I have 30lbs in it now w/ 420rwhp what size will I need with a 150 dry shot? Thanks

 

You might want to go with a wet shot with those mods unless you have DFI. You will probably want bigger injectors than the 30lbrs even with the increased fuel pressure. I have a cam similar to the cc306 mine is a GTP-6 cam. Specs are .568 .592 lift 235 242@.050 and a 112 lsa. My car picks up a lot on the 150 shot. Set up for nitrous my car runs 11.9@115mph and on the 150 shot I drop to a 10.3@129mph. My Best NA was an 11.4@118 with 4.11's and a 26" tall tire. I run 3.70's and a 28.2" tall tire for the bottle. BTW I run 30lb injectors N/A right now and they are pretty close to their limits N/A.

Good Luck

Matt

 

I was wondering if the GM847 cam would be good for nitrous but after seeing your results Nostang 96z I am not wondering now. Your cam specs are really close the the 847 so it should react similar. The 847 is 234/242 575/595 112 compared to your 235/242 568/592 112. They should be very similar. What do you think?

 

Thanks,
The cams are very similar and should perform very closely if not identical. The small differences in specs should not make any difference. You will need good heads to run good numbers though. I have GTP Stage 2 LT4's heads and intake. If you are doing a 383 I would go with a bigger cam to take advantage of the bigger cubic inches.

Matt

 

I'm not going with a 383. I had a 383 in my old car. Staying 350 with this one.

 

my car put down over 500 rwhp on a 125 wet N.O.S. n2o shot... I have a 306... I have only ran 1 bottle through it with the cam though. I saw a huge torque gain though, I gained about 200 ftlbs...

 

I appreciate all your comments and thoughts on the 306 cam and here is what im going to build even tho i really thought hard about going solid roller but it would have cost me about a grand for everything. Here is my build up for the juice.

LT1 block bore .30 over 355c.i
JE 12.5 to 1 forged pistons (NEW)
Eagle forged crank 3.48 stroke (NEW)(stock stroke)
Scat I beam 6" rods
O-ringed block and reciever grove on the heads (NEW for juice)
LT-1 heads ported & flowed 280cfm
52MM TB- Ported Intake
Comp 306 cam
Comp R-lifters
Comp 1.6 Promagnum RR's
Crane dual springs
Long Tubes, True duals etc....

Im also going to an Elect water pump some has told me it will gain me a tenth of a second.

I will be also running a wet shot and i will start with like an 150 and work my way up to an 250 or so. This combo should make some decent power N/A and on juice. Will let everyone know thanks again!!!

 

Have fun running 110 octane everywhere .

 

Wouldn't it be better to run a 5.7" rod instead of a 6" if your running nitrous?