Standard Gtr Cams And Cam Gear

[LZYSKY]

as the topic states will gtr standard cams and cam gears fit onto a rb20det, cause i have seen a few cars around on for sale sections saying they have them fitted on, i wanna konw if thats just crap talk or if it is really done, and also what difference is makes, is it minor or does it do some good?

thanks for your time

shaun

[cowie165]

Hi Shaun

Dude I have an RB26 not RB20, so this is just what I've read on SAU and HPI etc. The cams will fit but apparently they aren't terribly good on an RB20 and the dynoed car actually produced less power than with the stock cams. Someone smarter than me will know why.

Not sure about the cam gears and I really wish I could find that thread/article. Might have been the HPI article where they 'made' an RB24...?

Cheers

Mark

[RB30-POWER]

Been plenty of threads on here about fitting them. Has been done, run a search.

I say why though.

Get a profile that suits your engine and required outcome.

If you are planning on just wacking them in and gaining a worthwhile performance improvement you would be wrong.

[The Dan]

If you put in the GTR cams, you also have to run all the GTR lifters and swap all the valve springs as well.

Like RB30 said....better off getting another cam that suits your engine. The GTR cams are a solid cam, whereas the GTST cams are hydraulic.

The GTR cams have a 9mm (?) lift and the GTST ones have 8.5mm

It would cost you a fortune to put in the GTR cams....picture the cost of doing a head gasket.....plus the cost of the cams, lifters, and springs. $2000 I reckon. You will get better results from bolting in a set of Tomei Pon cams and they are only $800 delivered.

[Beer Baron]

ok you are a long way off base mate. plenty of people have installed GTR cams into RB20 without haveing to replace the whole valve train. also can you tell me why you'd need to change the headgasket to install cams? solid cam vs hydraulic cam? no such thing mate. perhaps you are talking about hydraulic lifters. now i am no RB20 expert but i am about 90% sure they have solid lifters (like an rb26) not hydraulic.

[The Dan]

Well, I'm sorry that you are wrong. The RB20 lifters are hydraulic. The GTR ones are solid shimmable buckets. And you DO have to remove the head to change it over properly because you need to remove the valves and springs to change them over as well. The GTR cams have a much greater lift and will f**k the Rb20 valve springs. And BTW, there is such thing as hydraulic cam and solid cam. If you've ever done ANY engine building in your time you would know that.

[Beer Baron]

well there are no 'hydraulic cams' in any RB engine. RB25s have hyrdraulic lifters and as such have a cam to suit, but other than being different specs (mainly lower lift, shorter duration and different base circle) the cams are not hydraulic themselves. like i said above i still think you are talking about the lifter mechanisms being hydraulic.

as for RB20s having hydraulic lifters, i do stand corrected then. i have never had an RB20 head appart so i wasn't sure. thanks for clearing that up for me

with the cam swap there have been a number of people who have done it here and none of them that i know of have had to change the valves, or the springs, or anything to do with the valvetrain other than the cams. some have had sucess with the swap, some have had problems. I do agree that it may not be worth it, though if you are on a tight budget you can get some GTR cams for about $200 and that's about all you need vs bolt in jap cams at $800. the jap cams will no doubt give a better result though, but cost 4 times as much.

[The Dan]

I am not referring to the cam being physically hydraulic. A hydraulic cam is used to refer to the fact it follows hydraulic lifters. You cannot use a hydraulic cam on solid lifters or vice versa. The solid GTR cam must be used in conjunction with the solid GTR lifters. The valve springs don't absolutely have to be changed but you will suffer valve bounce from around 6500rpm because the rb20 springs are not designed for a 9mm lift. Sure you can bolt them in...but you are stupid if you do. It would be like saying....I can only afford 4 forged pistons so I'm gonna run 4 forged and 2 cast. You can still do it but you will suffer in the long run.