cam choice for a well balanced nitrous engine
#1
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Car: 1989 Firebird
Engine: N2O 355CID
Transmission: T-56
cam choice for a well balanced nitrous engine
ok, im planning on shooting 100 shot through it for now but eventually working up to a 150 shot which is maxed out for my kit.
i'm wanting a cam that'll rev fast like a pro stocker on motor, but be a mustang buster on nitrous. my heads are Brodix Race Rite 200cc's with a 67cc combustion chamber, Brodix Single plane intake, Demon 750 carb, forged bottom end punched .30 over, 3.480 stroke and Total Seal Gapless rings. i have a Lunati Bracket Master II cam 109 lobe sep. 292 dur. .480int .480exh hydr. flat tappet but im thinking that it isnt going to be enough for what im wanting it to do. so if you guys have any information on this, i would sure appreciate it. if you guys need anymore info on the engine, i'll be glad to share it.
-Brandon
i'm wanting a cam that'll rev fast like a pro stocker on motor, but be a mustang buster on nitrous. my heads are Brodix Race Rite 200cc's with a 67cc combustion chamber, Brodix Single plane intake, Demon 750 carb, forged bottom end punched .30 over, 3.480 stroke and Total Seal Gapless rings. i have a Lunati Bracket Master II cam 109 lobe sep. 292 dur. .480int .480exh hydr. flat tappet but im thinking that it isnt going to be enough for what im wanting it to do. so if you guys have any information on this, i would sure appreciate it. if you guys need anymore info on the engine, i'll be glad to share it.
-Brandon
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Car: 91 GTA and 85 IROC
Engine: 355
Transmission: gear jammer
Axle/Gears: 4.11
Split dur. and more lift on the exhaust side will aid the n2o. Along w/ a wider lsa like 113-114.
What are the flow numbers on your heads?
What are the flow numbers on your heads?
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Car: 1986 Camaro
Engine: zz4 350 w/mods
Transmission: 700-R4 W/Shift kit
i ran that sized cam with my 350 on n20. i had ported l98 heads, and the nitrous liked it just fine.
i ran a 8.7 in the 1/8 on the motor, then on a 100 shot i ran a 7.9
then on a 150 with traction loss i ran a 7.6 @ 96 mph...
i ran a 8.7 in the 1/8 on the motor, then on a 100 shot i ran a 7.9
then on a 150 with traction loss i ran a 7.6 @ 96 mph...
#4
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Car: 1989 Firebird
Engine: N2O 355CID
Transmission: T-56
the flow numbers on my heads are:
Flow Chart (cfm @ 28" H2O)
Valve Size 0.200 0.300 0.400 0.500 0.600 0.650
2.055 INTAKE 125 182 227 260 266 269
1.600 EXHAUST 97 129 155 171 179 185
Flow Chart (cfm @ 28" H2O)
Valve Size 0.200 0.300 0.400 0.500 0.600 0.650
2.055 INTAKE 125 182 227 260 266 269
1.600 EXHAUST 97 129 155 171 179 185
#5
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A 100-150hp shot of juice is barely scratching the surface.
Just a "tuneup" on your motor. Its not enough of a shot to warrant a NOS grind.
taht being said you can do a lot better than the .480" lift cam you have now.
Need to know more details : Converter stall speed, rear gear
ratio, tires, valvetrain parts on the heads now Springs, rockers etc. Engine compression ratio, fuel octane. Exhaust system details.
Brodix heads like lots of valve lift. More is better.
Something .550"+
I'd be stepping up to a mechanical lifter cam. (RPM, power)
Do you want a flat tappet or a roller?
I'm thinking something along This Line
Big enough to make power on and off nitrous. it's actually a nitrous friendly grind. I'd use 1.6 rockers.
Needs a 3000-3500stall. Still relatively street friendly.
A simular duration Solid "Street Roller" grind would be nice too.
Somethng like Comp Cams 12-771-8
Would be a good street strip "Dual Purpose" NOS friendly grind as well as perform N/A.
Either would be nice step up from the cam you have now, (both in terms of power and rpm capability), without getting too radical. Either are still street friendly.
Just a "tuneup" on your motor. Its not enough of a shot to warrant a NOS grind.
taht being said you can do a lot better than the .480" lift cam you have now.
Need to know more details : Converter stall speed, rear gear
ratio, tires, valvetrain parts on the heads now Springs, rockers etc. Engine compression ratio, fuel octane. Exhaust system details.
Brodix heads like lots of valve lift. More is better.
Something .550"+
I'd be stepping up to a mechanical lifter cam. (RPM, power)
Do you want a flat tappet or a roller?
I'm thinking something along This Line
Big enough to make power on and off nitrous. it's actually a nitrous friendly grind. I'd use 1.6 rockers.
Needs a 3000-3500stall. Still relatively street friendly.
A simular duration Solid "Street Roller" grind would be nice too.
Somethng like Comp Cams 12-771-8
Would be a good street strip "Dual Purpose" NOS friendly grind as well as perform N/A.
Either would be nice step up from the cam you have now, (both in terms of power and rpm capability), without getting too radical. Either are still street friendly.
Last edited by F-BIRD'88; 12-28-2005 at 08:47 PM.
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Car: 1989 Firebird
Engine: N2O 355CID
Transmission: T-56
stall speed isn't a concern because i have a 5 spd, the valvetrain is 600 max lift springs, i already have 1.6 roller rockers, rear end is 3.42 but will be 3.73 with a powertrax, tires are going to be 17" ZR1's for the street and 15x8 wel pro stars hoping to get an overall tire height of 26"s with MT ET street Drag radials on it, compression will be about 10-10.5:1, fuel will be 93 alot but i'll get a wild hair every once in a while to run Cam2. exhaust is the one area i havnt decided on yet, i know im going to have long tubes but the rest of it i am unsure about, i want to run a single bullet or spintech pro race series and get some round to oval pipe and run it out the pass. side, but i also want to get the hooker cat back or a magnaflow system for it. i like the looks of that cranes cam profile. i'll have to write down that part number and look it up tomorrow at work, since i work at advance auto parts and all, and io can get a 20% discount on that sucker >
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