If your looking to put 2JZ cams into your 1JZ, look at this

[Ric]

Unfortunately, after playing with the cam gears, the best setting for my car was 0 degrees on both cams.... No gains for a lot of money.

Thats actually quite amazing... most 2jzgte stock cams work good -4 exhaust and +2 intake.

becides, titan 2jzgte cam gears are actually quite cheap, just ask for the used ones

 

[Kosh]

Just curious if someone could now throw up some comparison graphs for other cams and see what the diff is between stock, 2jz modded, crower, hks, JUN, etc and a lil price comparison. I tried searching for some comparison graphs of jun and hks but couldn't find any.

Thanks!

 

[AF1JZ]

Here's a link for the crower's posted up by Zazzn in a group by. There is a graph in the first post.


I really doubt that you are going to find a comparison of all those different cams with the exact car for the dyno run.

 

[Kosh]

Well, this post has pretty much already covered the diff between stock and 2jz and crowers, i'm just trying to figure out the diff between those and the big $500+ cams out there and y they're that much more expensive.

 

[AF1JZ]

The name brand probably.

 

[Bigzavs]

most things are the name accounting for 1/2 the price

 

[Kosh]

If i were to upgrade to better cams that can bring out my power curve a lil further. How do i know when i am getting to the limits of my valve train. How can i tell when i'm starting to get valve float and how i determine a safe limit to red line at?

 

[AF1JZ]

Don't quote me, but I think I've read 8000-8500.

 

[Bigzavs]

If i were to upgrade to better cams that can bring out my power curve a lil further. How do i know when i am getting to the limits of my valve train. How can i tell when i'm starting to get valve float and how i determine a safe limit to red line at?

when i posted this question about a week ago, i was told that on the stock valvetrain, float would occur at 7K according to the guys that were responding.

 

[Kosh]

well thats shitty considering stock red line is 7500....pretty much have to upgrade valve train right away then...but does anyone know any actual physical indication or is it just spring rate and velocity calculations. I could use theory and calculate the theoretical acceleration of the spring, and knowing the distance it moves, get the max limit of how fast it can fully compress and uncompress thus giving me max rpm before float. but thats theoretical and we all know how real world is always different than on paper.(unless ur NASA, but then u just end up turning mars landers into craters...) lol

 

[AF1JZ]

I'm pretty sure that it will be in the 8000 range because of the 1jz redline being in the mid 7000's already.

Ric- What do you know? I remember you saying something before about where the 1jz valves float.

 

[rakkasan]

I tap 8k regularly, no valve float noticed...

 

[Kosh]

How do you get rid of the rev limiter and how do you know that you don't have valve float?

 

[Bigzavs]

usually a tuned ecu, a piggyback, or a standalone

 

[rakkasan]

How do you get rid of the rev limiter and how do you know that you don't have valve float?

Magic....

 

[86_sports_1jz]

doesn't the size of the turbo play a role in when valve float occurs besides cam size?

 

[AF1JZ]

Not really the size of the turbo. But, how much air you are flowing.

 

[Bigzavs]

well, im about to be getting a set to work on from a guy on here, and ill take some before and after pics with a digital mic, just to let you guys see

 

[86_sports_1jz]

Not really the size of the turbo. But, how much air you are flowing.

so i'm guessing its how much boost is ran then right?

 

[AF1JZ]

exactly.