What is the best No2 Cam
TECH Senior Member
Joined: Mar 2004
Posts: 14,620
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From: BFE
Originally Posted by SportSide 5.3
Predator,
What type of exhaust are you running? I remember seeing a nitrous fed reverse pattern camshaft gaining 60rwhp w/ dual cut-outs engaged.
In fact...
http://img.photobucket.com/albums/v4...ls1/bottle.jpg
What type of exhaust are you running? I remember seeing a nitrous fed reverse pattern camshaft gaining 60rwhp w/ dual cut-outs engaged.
In fact...
http://img.photobucket.com/albums/v4...ls1/bottle.jpg
1 3/4 MACs portmatched and cleaned primaries, with collector mod, custom 2.75' ory and cutout.
Originally Posted by PREDATOR-Z
Granny, I never said this was a nitrous cam. And at that level (over 150 rwhp shot) it is better to shoot a traditional split. But I used to shoot my stock one and get the same % results in horsepower gain. shoot a 100 and gain 83rwhp.
I didn't think that the Stealth would take over 125>150 shot but because of the 116lsa (-10* overlap) it did. And just a reminder, this is a "reverse split" 224/220, daily driven, emission passing little cam.
I didn't think that the Stealth would take over 125>150 shot but because of the 116lsa (-10* overlap) it did. And just a reminder, this is a "reverse split" 224/220, daily driven, emission passing little cam.
Originally Posted by GrannySShifting
I understand that... but he was asking for a nitrous cam 
TECH Senior Member
Joined: Mar 2004
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From: BFE
Originally Posted by PREDATOR-Z
Well actually the less overlap the better off you are. Up to ~150 shot wet, it makes lttle difference of what cam you use.
I shoot 200 dry on a 224/220 116+0 with excellent results.
Back TTT, FM 7 and FM9 are good for big shots.
I shoot 200 dry on a 224/220 116+0 with excellent results.
Back TTT, FM 7 and FM9 are good for big shots.
A nitrous cam is only so after ~ 150 shot.
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Originally Posted by Deckhand
I know people despise the hotcam, but with its small intake/large exhaust duration with a big split, do you guys think it would have great benefits on the juice?
The FM grinds Predator mentioned shoudl work good as well as a few other off the shelf grinds. I had good luck with FM7 in a 8 psi Procharged stock longblock car, 550 rw
Where did the guideline of over 150 shots need reworked valve events come from?
Take for example.
A n-a "street" setup using a 110* lsa. It could use more overlap but again, the user wants street manners.
So when a 200 shot is used, does the overlap need to be less? I see it as no. Seeing as a tighter ld could have been used for the n-a setup. Why widen the lobes when they are already wide, for meeting the users street requirements?
Seems a lot use wide ld's just because they have been warned of shooting out boost, nitrous or w/e the occasion.. out the tail pipe.
opinions?
Take for example.
A n-a "street" setup using a 110* lsa. It could use more overlap but again, the user wants street manners.
So when a 200 shot is used, does the overlap need to be less? I see it as no. Seeing as a tighter ld could have been used for the n-a setup. Why widen the lobes when they are already wide, for meeting the users street requirements?
Seems a lot use wide ld's just because they have been warned of shooting out boost, nitrous or w/e the occasion.. out the tail pipe.
opinions?
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Joined: Mar 2004
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From: BFE
Bringing this back from the Dead as this LSA issue has been working in my head for about a week after some comments made in another thread.
After so more inquiring, I came to the conclusion that wider lsa and 0 or negative overlap cams are more forgiving tuning wise, while running N2O.
Also, I'm starting to see more clearly that VE's matter much more than LSA in a nitrous cam denomination.
After so more inquiring, I came to the conclusion that wider lsa and 0 or negative overlap cams are more forgiving tuning wise, while running N2O.
Also, I'm starting to see more clearly that VE's matter much more than LSA in a nitrous cam denomination.
In a nitrous motor, the combustion process happens at a much faster burn rate. That is why retarding ignition timing makes more power in a nitrous application. Also for the same reason, a nitrous motor responds to an earlier exhaust opening. The combustion cycle is completed faster. Opening the exhaust valve a little earlier will eliminate some pumping losses and make more power. The result of opening the exhaust earlier often results in a cam that has a wider lobe separation angle, but that does not necessarily mean you have to run a wider LSA to get the earlier exhaust valve opening. It's all in choosing the proper valve events.
__________________
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
Originally Posted by PREDATOR-Z
Yes, dual stage dry, 164rwhp (all this from a modified NOS 5177 kit), I could shoot up to 250 with that but I've never tried (yet)
TECH Senior Member
Joined: Mar 2004
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From: BFE
Originally Posted by V6 Bird
Then no its not good enough...got LSA???? Cuz you could use it to make power more efficiently. Afterall is the volumetric efficiency of what you got that means win or losing a race.
