LS9 cam ?s
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From: metro detroit, mi
LS9 cam ?s For those of you that have LS9 cams- Do these cams produce any low end power? I was going to use one if the power is there in the lower rpms for a lot of street driving/racing. Will it be any good in a 402 with 18-20 PSP boost?
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I wouldn't suggest it at all unless you are going to install it yourself cause its a waste of money to have someone install it. Friend of mine has one and he wishes he would have just got a real cam in the first place. I can see it for a sleeper car with a top mount but that's about it.
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If your building up a 402, there are much better cam's out there. Get with someone and get one custom spec'ed out for your needs and goals. A good cam can make or break hp, drivability, spool, etc all depending on what you want. Your obviously spending the $$, dont cheap out on the cam. just my opinion
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From: metro detroit, mi
Anybody use Lingenfelter's GT-9 cam? They claim its for supercharged or turbo, smooth idle? Also this is going into my heavy *** tbss that weighs like 5,000 lbs, so I will need all the low end grunt I can get.
I have a spin off grind that is similar to the LS9 cam that is larger than what comes from the OEM and uses aftermarket lobes. I still think you need something custom or different than that though. A reverse grind cam or single pattern will make much more torque than the LS9 cam will. Opening the exhaust valve as late as is necessary to work with the rest of your components and set-up will produce the largest amount of torque possible. That and keeping the IVC event in check will get you the low end power you seek.
If you'd like shoot me a P.M. and we can discuss your options.
If you'd like shoot me a P.M. and we can discuss your options.
i have put the ls9 cam in about 4 cars, i like it. its 100 dollars.
i would be curious to see how much i have to gain by just simply swapping in a Martin@tick or other spec'd cam, maybe one day ill do it for the lulz
but 20 inches of vac at idle, and beatuiful calm cruise and great mileage is hard to beat for 100 dollars
i would be curious to see how much i have to gain by just simply swapping in a Martin@tick or other spec'd cam, maybe one day ill do it for the lulz
but 20 inches of vac at idle, and beatuiful calm cruise and great mileage is hard to beat for 100 dollars
I will bite even though I've never installed one. It has a very early EVO event which will produce higher average power and a flat torque curve across the power band. I don't consider this a "torque" minded cam because of that, as I see a more "torque" minded cam having an late EVO event which allows a large peak torque number to be made. Combine that late EVO event with added overlap(which the LS9 cam doesn't have) and the right IVC event and you have a torque monster of a cam that will pull to whatever you limit it to with the IVC event.
Basically this:
Late EVO=high peak torque number lower peak horsepower(trades peak horsepower for peak torque)
Early EVO=lower peak torque number more peak horsepower(trades peak torque for peak horsepower)
Now those can be manipulated through overlap and other events such as IVC event and duration at .200" but you have to know what you're doing to get those results.
As OH4GTO said it was designed with a light car in mind that doesn't need a lot of peak torque to get it moving from a dead stop, but would benefit from a high average number so it feels like it has a lot of torque if that makes sense because the torque curve will be flat and "feel" like it pulls harder than the torque value would indicate. It was designed for a blower car that has insane peak torque and off idle torque because of the style of blower and to effectively kill bottom end power with an early EVO in an attempt to shift that torque higher into the power band where a small roots or twin screw begins to plateau and fall off at.
Basically this:
Late EVO=high peak torque number lower peak horsepower(trades peak horsepower for peak torque)
Early EVO=lower peak torque number more peak horsepower(trades peak torque for peak horsepower)
Now those can be manipulated through overlap and other events such as IVC event and duration at .200" but you have to know what you're doing to get those results.
As OH4GTO said it was designed with a light car in mind that doesn't need a lot of peak torque to get it moving from a dead stop, but would benefit from a high average number so it feels like it has a lot of torque if that makes sense because the torque curve will be flat and "feel" like it pulls harder than the torque value would indicate. It was designed for a blower car that has insane peak torque and off idle torque because of the style of blower and to effectively kill bottom end power with an early EVO in an attempt to shift that torque higher into the power band where a small roots or twin screw begins to plateau and fall off at.
