cam decision
Thread Starter
Launching!
Joined: Oct 2012
Posts: 219
Likes: 0
From: near Beech Bend race way
cam decision Ok im Going with 370 lq9 new , PRC 5.3 59 cc, already have them, puts it at 11:5 ,
Which cam you guys think, I drive it a lot and drag on weekend, i i spray 150 - 200
226/232 578/587 115+4
Other
236/250 625/625 115+4
Thanks
Which cam you guys think, I drive it a lot and drag on weekend, i i spray 150 - 200
226/232 578/587 115+4
Other
236/250 625/625 115+4
Thanks
I would split the difference between them. 230/238 113+4. 236/250 to me is too much split, but 226 on intake isn't enough cam.
That cam I just listed is cam motion Titan 5. Another great option would be tick performance LS2 street heat 2 at 231/235.
That cam I just listed is cam motion Titan 5. Another great option would be tick performance LS2 street heat 2 at 231/235.
TECH Fanatic
Joined: Aug 2009
Posts: 1,845
Likes: 255
From: Coast of San Mateo County Between Pacifica & HMB
I agree with Darth & Jake (beat me to the post LOL!), especially the Titan 5, + 8* Exhaust split
Will work better then the LS2 Street heat with +4* exhaust split
On a 150-200 shot!
Will work better then the LS2 Street heat with +4* exhaust split
On a 150-200 shot!
Decent quality....you could also get a custom from them of the specs these guys are telling you...just scope their catalogue and pick the two lobes needed from other grinds....IIRC they don't have an LS 230 lobe but have a couple really nice 232 sized that with a 240 or so ex. would run strong on spray....
Thread Starter
Launching!
Joined: Oct 2012
Posts: 219
Likes: 0
From: near Beech Bend race way
Thanks everyone for the help, had 2 well known companys spec it, both said the 236/250 115+4 625-625 lift would work great .
So, when i get it to the dyno and track i will post the results .
thanks again
So, when i get it to the dyno and track i will post the results .
thanks again
Last edited by M1SERY; Jul 29, 2015 at 02:17 PM. Reason: spelling
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I'm running a 230/238 113+3 in mine. I don't use nitrous but the cam is in an ls2 which is similar to how your lq9 is going to be set up and it runs awesome but still drives perfect on the street.
Just to clarify though, the Cam Motion Titan V is a 230/234 113+4. The Cam Motion 230/238 is a 112+4 and called "The Penetrator" according to their website.
Mine is a custom Cam Motion cam with 230/238 .620"/.602" lift and a 113+3 LSA. That's the beauty of CM, they can grind it any way you want...different lift on the same duration lobes and what not. You get a Cam Dr report showing the cam cut is exactly what you ordered too which is nice.
Just to clarify though, the Cam Motion Titan V is a 230/234 113+4. The Cam Motion 230/238 is a 112+4 and called "The Penetrator" according to their website.
Mine is a custom Cam Motion cam with 230/238 .620"/.602" lift and a 113+3 LSA. That's the beauty of CM, they can grind it any way you want...different lift on the same duration lobes and what not. You get a Cam Dr report showing the cam cut is exactly what you ordered too which is nice.
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For a bottle baby with your setup, I think that 236/250 115+4 will work great. Can't wait to see your results.
The 236/250 625/625 115+4 camshaft has 13 degrees of overlap at .050". This camshaft has more overlap than a single pattern cam of 236/236 112 which only has 12 degrees of overlap at .050".
If you look at the valve events of the recommended cam @ .050", you get this:
IVO 7
IVC 49
EVO 64
EVC 6
Overlap = 13 degrees
This cam has a little later intake valve close of 49 degrees ABDC, but with 11.5:1 compression and long runner intake like the factory peice or a FAST, that should be just fine N/A. I have seen nitrous cams that would kill N/A performance, but this should not be one.
Thread Starter
Launching!
Joined: Oct 2012
Posts: 219
Likes: 0
From: near Beech Bend race way
I think it is better to talk about this in terms of overlap. When you widen the LSA, you lose overlap. But, when you increase the exhaust duration you gain overlap. So, the wider LSA by itself may not hurt N/A performance at all.
The 236/250 625/625 115+4 camshaft has 13 degrees of overlap at .050". This camshaft has more overlap than a single pattern cam of 236/236 112 which only has 12 degrees of overlap at .050".
If you look at the valve events of the recommended cam @ .050", you get this:
IVO 7
IVC 49
EVO 64
EVC 6
Overlap = 13 degrees
This cam has a little later intake valve close of 49 degrees ABDC, but with 11.5:1 compression and long runner intake like the factory peice or a FAST, that should be just fine N/A. I have seen nitrous cams that would kill N/A performance, but this should not be one.
The 236/250 625/625 115+4 camshaft has 13 degrees of overlap at .050". This camshaft has more overlap than a single pattern cam of 236/236 112 which only has 12 degrees of overlap at .050".
If you look at the valve events of the recommended cam @ .050", you get this:
IVO 7
IVC 49
EVO 64
EVC 6
Overlap = 13 degrees
This cam has a little later intake valve close of 49 degrees ABDC, but with 11.5:1 compression and long runner intake like the factory peice or a FAST, that should be just fine N/A. I have seen nitrous cams that would kill N/A performance, but this should not be one.
my worst fear is that it will run a 110 mph on n/a in the 1/4 mile,
I'm going to run a fast 92/92 , with a 92 Plate system, I did take a little time and port match it , and I'm going to set quench 35- 40, should put it around 11.5 compression with the 2 cc valve reliefs, will keep posting , going to put heads together and check piston to valve clearance so I can order head gasket s this week
Last edited by M1SERY; Sep 1, 2015 at 09:58 PM.
Unless you are in high altitude it should run way better than that. I trapped as high as 116mph through a stalled auto with a ls1 with 799 heads and 230/238 cam. This is in a 3700lb brick. A 4th gen fbody would add no less than 2mph to that trap due to weight, aero, and ram air.
I'm really hoping the ls2 runs at least 118mph for me.
I'm really hoping the ls2 runs at least 118mph for me.