Am I limiting myself with current cam in LQ9??
06-25-2012, 08:31 AM
#1
Am I limiting myself with current cam in LQ9?? Car has a 6.0L LQ9. heads are tsp stage 2.5 5.3L. unported fast 102 intake and tb, and 104mm ftp lid. no maf. cam is 230/224 lsa 111. qtp 1 3/4 headers, with 2.5" true duals, dumped. i know the heads are my limiting factor here, but I cant change them anytime soon. if it matters, stall is 3200 and gears are 3.73s. Am i missing out on some serious power (like 15-20 hp) with this cam? I originally built car as a DD, but it no longer is anymore, so i dont mind a larger cam. as long as it works with the lq9, stall, and heads on there currently. thanks for the help.
Last edited by Yahelou; 06-25-2012 at 09:51 AM.
06-25-2012, 10:20 AM
#6
Your cam is a reverse spilt made more for the original ls1 intake since it was the choke point and this allowed more time to get air in. Since you are running the 102 I would definately get a can with more exhaust duration than intake duration (standard split cam)
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06-25-2012, 07:20 PM
#13
I would honestly go with a bigger stall than the cam! See how fast it runs, than switch the cam. You will see more gains out the stall than the cam especially for the price. Go with a circle D 5C (4000 stall).
I was running the old MTI X1 230/227. I had it with a vig 3200 and drive great.. Then swapped for a 4000 stall, and lets just say it shined even with that reverse split. Top end pull was amazing..
I was running the old MTI X1 230/227. I had it with a vig 3200 and drive great.. Then swapped for a 4000 stall, and lets just say it shined even with that reverse split. Top end pull was amazing..
06-26-2012, 04:22 AM
#15
TECH Senior Member
Going more exhaust split will shift the trq curve upward into the rpm and add a few top ponies.
Since you have TSP heads, I would talk to them to see what cam will fit nicely without running into PTVC issues.
N2O is not all that great with a RS cam so more than 100>125 shot is a waste.
Since you have TSP heads, I would talk to them to see what cam will fit nicely without running into PTVC issues.
N2O is not all that great with a RS cam so more than 100>125 shot is a waste.
06-26-2012, 05:28 AM
#16
Going more exhaust split will shift the trq curve upward into the rpm and add a few top ponies.
Since you have TSP heads, I would talk to them to see what cam will fit nicely without running into PTVC issues.
N2O is not all that great with a RS cam so more than 100>125 shot is a waste.
Since you have TSP heads, I would talk to them to see what cam will fit nicely without running into PTVC issues.
N2O is not all that great with a RS cam so more than 100>125 shot is a waste.
06-26-2012, 06:04 AM
#18
TECH Senior Member
Back in the early LS days that is why Thunder Racing came up with that cam; but when using RS cams I came to understand that one should not apply traditional split theories and should step out of the box. Look at my sig. I run a RS cam but with different valve events than traditional logic. One thing I did not like in the Tr 230/224 is that it ran out of breath quickly after peak. This is why mine is on 110-1 LSA (retarded instead of advanced). Why?
To change IVC (delay it). that in conjunction with other valve events made my RS carry well after peak and i then got to benefit from early trq increase and higher rpm power carry. Yes RS cams make less peak power than traditional splits but the power (trq) comes on early in the band and gives a wider average Hp/trq gain than a traditional. This was perfect for me since I DD almost all my setups.
You can see that in the power curve below:
400lbs by 3500rpm is awesome for 346 cubes yet it carried the peak well into 6700 rpm without a major dive. Bottom line power "under" the curve is wide.
To change IVC (delay it). that in conjunction with other valve events made my RS carry well after peak and i then got to benefit from early trq increase and higher rpm power carry. Yes RS cams make less peak power than traditional splits but the power (trq) comes on early in the band and gives a wider average Hp/trq gain than a traditional. This was perfect for me since I DD almost all my setups.
You can see that in the power curve below:
400lbs by 3500rpm is awesome for 346 cubes yet it carried the peak well into 6700 rpm without a major dive. Bottom line power "under" the curve is wide.
06-26-2012, 08:30 AM
#19
alot of good info. thanks guys.
i love the way the stall is driving now. i really dont want to swap it out. and im still debating doing nitrous. honestly dont know if i will or not. i do want to make sure i have the correct cam and setup before i spray which is why i want to figure this out.
i love the way the stall is driving now. i really dont want to swap it out. and im still debating doing nitrous. honestly dont know if i will or not. i do want to make sure i have the correct cam and setup before i spray which is why i want to figure this out.