Na Cams In Rb20det

[4dirty2]

iv herd of ppl puting non turbo cams into turbo motors b4 is it wurth it as i hav a non turbo motor at hm that i can pull the cams out of an use.

both are silver top rb20z

[Raul]

It should give a slight increase but nothing drastic maybe a KW or so. I think best results would be with adj cam gears as well.

What about rb25 NA cams? they any more agrresive?

[mr_rbman]

It should give a slight increase but nothing drastic maybe a KW or so. I think best results would be with adj cam gears as well.

What about rb25 NA cams? they any more agrresive?

i believe rb25 na ones are even worse again, don't bother with the na rb20 cams!

[R31 drift pig]

we put NA cams in my 20 and gained 4 kw's.... Then again it was a redtop and they have slightly more agressive cams already.

If you have them already and can do the work yourself.... might be worth it.

[sinistaGTR]

are 20 and 25 cams interchangable.......

[R31 drift pig]

No, 20 and 26 cams are... and 26 cams in a 20 lose power, not a gain in sight.

I say, if you already have them and can do the swap by yourself... then go for it.

If not, I wouldnt really bother.

The gains are minimal at best... might gain a handful of KW's but thats about it.

Adj. Cam gears might give another few KW's on top, but for the price it really isnt worth it.

[Maxx]

No, 20 and 26 cams are... and 26 cams in a 20 lose power, not a gain in sight.

http://www.skylinesaustralia.com/forums/in...tr+cams+in+Rb20

apparently there is some gain from GTR cams?

"i don't own a rb20 nor read the whole thread"

[R31 drift pig]

Well, there ya go. Ive heard a few stories (and it seems thats all they are) that people have lost power with 26 cams...

Might have to go hunt a set down and see if it's true.

[salad]

I'd say it is true. Sydneykid is a VERY reliable source. You will just have idle problems which will probly be a bitch, but if you can get it to idle, very lumpy and power gains in the mid-high region

[Madaz]

so how come 26 cams dont go in 25 heads i thought pretty much there all interchangeable

[Cubes]

'Some' well only ONE that I know of has had RB26 cams work in their RB20det, but many more have started their car to have it lump over and idle badly due to a valve tapping the piston. Roy had this happen to his following rb26 cams and had to drop another motor in.

However... The few stuffed motors due to the rb26 cams being fitted 'may' be due to the backyarders who fitted them.

When pulling off the cam lifters should be bled again as they tend to pump up a little and when the new cam is bolted in they 'can' crack a valve on the piston sitting on tdc below. As a rule of thumb its always wise to spin the motor ~10degree's or so off TDC when bolting in the new cams to prevent such an expensive stuff up.

The Rb26 runs solid followers as a result the cams are able to run a much more aggressive ramp rate. This aggressive ramp rate is not suitable for hydraulic followers.

The Rb20DET cams are more aggressive than the rb20de cams.

So throw a set of adj cam gears on the rb20det cams and you will see improved (over rb20de cams) power once on boost.

The RB20de cams will pull up the bottom end a little due to its small inlet cam.

All in all... Say no to rb20de cams. Throw a set of adj. cam gears on your std rb20det cams for an even greater power improvement.

Rb26 cams... Well that depends if you want your rb20det become another statistic. In theory the solid follower cams are not suitable for the hydraulic follower heads. Its well known rule of thumb for all motors. The Rb26 -> rb20 may be an exception. Its not worth the effort really. Throw a set of adj cam gears on the stock cams and they are good enough.

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Madaz.. That IQ test.. I got 132.. I'm certain I answered all the questions correctly but obviously not.

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Merry Xmas all.