First Experience With Heads And Cam Questions
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Teching In
iTrader: (29)
Joined: Jan 2004
Posts: 39
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From: Denham Springs, Louisiana
First Experience With Heads And Cam Questions Just Installed heads and cam and have a few questions. Car is 2002 TA. Heads from TSP. 243 LS6 heads CNC'd With LS6 springs Stock valves. Cam is Comp cam 220/224 114 lsa +4 563 lift Mac Headers ORY Cutout. Underdrive pulley, home ported MAF and throttlebody, airlid, filter. Tuning was done by Thunder Racing. I am happy with the performance, the car really pulls hard.
The car put down 416 RWHP and 407 RWTQ uncorrected and 391 RWHP and 382 RWTQ corrected. Does this sound low for my setup? I don't really understand the difference between uncorrected and corrected.
My other question is about the idle. The car shakes alot more than it did before cam. I chose this cam because the 114 lsa was supposed to have a good idle and this is my daily driver. I am considering putting a stock LS6 cam in for a better idle. When I am sitting at a stop light It really shakes alot.
Any input is appreciated Thanks.
The car put down 416 RWHP and 407 RWTQ uncorrected and 391 RWHP and 382 RWTQ corrected. Does this sound low for my setup? I don't really understand the difference between uncorrected and corrected.
My other question is about the idle. The car shakes alot more than it did before cam. I chose this cam because the 114 lsa was supposed to have a good idle and this is my daily driver. I am considering putting a stock LS6 cam in for a better idle. When I am sitting at a stop light It really shakes alot.
Any input is appreciated Thanks.
Whats your dyno graph look like? Does it fall off abruptly like it hit a wall? Maybe youre floating youre valves. Even if the ls6 springs are good for .570 lift, youre running enough duration to warrant a little more spring like the 918's. The lobes are likely more agressive than the ls6 cam's are. Also, with this cam, youve got higher duration and lower lsa than the ls6 cam. The car will shake a bit more at idle. Its par for the course.
Thread Starter
Teching In
iTrader: (29)
Joined: Jan 2004
Posts: 39
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From: Denham Springs, Louisiana
Car is a M6. Graph climbs to about 6000 then slowly drops off. I'd post it but I don' have a digital camera. Should I consider that I have 391 or 416 RWHP?
RDY2RUN, I just got the cam installed in mine, 224/228 .590/.590 113, and it shakes a lot more at idle too, but that is the cam for ya. From all the cam installs that I've been involved with, they all do it, it's just the cam. Raising the idle will help some though. Also, make sure that you don't just have a miss on one of the cylinders. Hope this helps!
Originally Posted by RDY2RUN
Car is a M6. Graph climbs to about 6000 then slowly drops off. I'd post it but I don' have a digital camera. Should I consider that I have 391 or 416 RWHP?
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possible that you installed it one tooth off? Not likely if it pulls smoothly till 6000+ rpm. Perhaps youre a little choked by the mac mid lengths? Some long tubes might get you into the ~400 range, but those numbers still arent wowing me. Anything else we should know about? Dirty air filter? Old fuel filter? What plugs and how old? Any other incidentals that could rob you of a few HP here and there? Is the car old and tired? Do you have huge wheels or big tires? What gears? Whats your CR and quench?
Its easy to get lost in the mentality of the 430+ HP heads/cam cars. Most of those cars are running much larger cams than you are. Perhaps I could see you gaining 30 or more HP with a bigger cam and some long tubes. If you look at it that way, youre not all that low.
Its easy to get lost in the mentality of the 430+ HP heads/cam cars. Most of those cars are running much larger cams than you are. Perhaps I could see you gaining 30 or more HP with a bigger cam and some long tubes. If you look at it that way, youre not all that low.
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thats not bad with that BABY cam and mid length headers...You are leaving ALOT of power on the table without Longtubes and a little larger cam....and yes Id also upgrade to 918 springs, you definitely COULD be floating the valves. Remember an Ls6 which runs those springs stock also has lighter sodium filled valves, not to mention you are already higher than the max lift rating for LS6 springs. First thing I would do is the easy swap to 918's then redyno...
Originally Posted by RDY2RUN
I am happy with the performance, the car really pulls hard.
I'd also swap the LS6 springs for 918s.
lope is normal.. to be expected with a cam. The power #'s aren't great, but not terrible either, I have seen more mild setups make more power, and more aggressive setups make less. I'd definately go to a better valvespring.. it's not "if" you are floating valves, you are floating them over 6000 for sure. 918's will get the job done for you, and the added piece of mind.
Originally Posted by cantdrv65
thats not bad with that BABY cam and mid length headers...You are leaving ALOT of power on the table without Longtubes and a little larger cam....and yes Id also upgrade to 918 springs, you definitely COULD be floating the valves. Remember an Ls6 which runs those springs stock also has lighter sodium filled valves, not to mention you are already higher than the max lift rating for LS6 springs. First thing I would do is the easy swap to 918's then redyno...
LS6 springs are rated at .580 lift.
https://ls1tech.com/forums/generation-iii-internal-engine/327734-cam-guide.html
