Upgraded Cams

[Captain Natro]

Hey guys im sure this has been covered 1000 times before, but does anyone know of a company that does performance camshafts for the RB25de

and if so what are the performance gains and costs involved?

(is this the next logical engine upgrade after induction extractors and exhaust?)

[-Jimmy-]

Tomei will be your best bet for upgraded cams.

HKS I'm sure make some too.

What kind of induction/intake did you upgrade to and what size exhaust?

I think for the cost you are only going to see minimal gains, modifying NA is not cheap.

That's not to say I don't think you should do it.

Edited June 9, 2011 by -Jimmy-

[weapon_unknown]

Has anyone dropped in bigger cams into rb25de NEO motor. I know the non neo cams won't work unless you cancel vtc and ive been on the tomei website looking at there catalogue of cams for the neo rb25 but in small writing at the bottom it says not suitable for N/A motor. Tomei cams are drop-ins and dont require tuning. I'm wondering if they only put in the small writing in because you would have to get a retune. I've called tomei authorised suppplier in qld a while back they said it should work but cannot give me any guarentees.

any oppinions on this would be helpful.

(Sorry for hijacking your thread)

[mad082]

NA and turbo motors require different cam profiles. you could put the turbo cams in and not get very good gains. certainly not really worth the effort. probably best off getting the cams reground, but you would need to find a profile of a NA cam for a neo motor.

as for gains, you'd see maybe 10 to 15hp if you're lucky.

[simjim89]

hay man i would also invest some time in looking at a regrind ..... i dont know price but i know of alot of people being able to get more out of the car after a re grind

[mad082]

a regrind is almost the same as getting new cams. they simply grind the cam lobes down to a new profile. they can also weld the cams before grinding if they need extra material in a certain section. so you could actually get a stock cam reground to have the exact same profile as an aftermarket cam.

[StealthX]

turbo > upgraded cams.

forget spending money on a non-turbo motor. especially on such a motor where its forced induction performance has been tried and tested for years...

if you're on Ps, just wait it out.

[Rbsongate]

De&det got 240in240ex same lift

[Super Drager]

Camtech here in sydney quoted me $570 for regrinds done, although thats 4 cams not 2.

[Captain Natro]

Camtech here in sydney quoted me $570 for regrinds done, although thats 4 cams not 2.

hey man, thats probley not to bad 570 sounds alright. haha yer i can imagine the quad cams would be more. what lift would you get them reground to though? how big can you go before you need to start changing stuff / the cam profile moves the torque curve so much it makes it usless for street use?

[TwoCents]

hey man, thats probley not to bad 570 sounds alright. haha yer i can imagine the quad cams would be more. what lift would you get them reground to though? how big can you go before you need to start changing stuff / the cam profile moves the torque curve so much it makes it usless for street use?

Go talk to someone from tighe cams, they can give you the information you need. http://tighecams.com.au/ there is even a lot of useful information on their site.

[Gerg_R31]

At our workshop we use tomeii kinetic and camtech though to me they're all the same just different names

neo 25s; biggest we've put in is rb26 10.8mm lift cams, a lot of modifying was needed (machining bottom of cam follower buckets, machining top of litter bores, springs to suit, eliminating vct)

difference between turbo and n/a cams are usually just lobe separation

Changing cams on their own can cause more dramas then they're worth, re tuning fuel maps, changing to make sure springs suit, cam gears to make sure they're timed properly

regrinds don't usually have very much difference from stock cams

picking aftermarket cams i recommend to choose them based on their rev range for what the car will be used for, going the biggest possible will give you top end power but the trade off is lack of power when its "off cam" or cam lag if you want to call it that.

hope that info helps

[SKiT_R31]

I used to have Surecam regrinds @ 255/8.3 for a non-neo RB25, I was told that was the furthest they could be taken (from 240/7.8) peak power was at 6000 and torque at 5000 (from 5200/4500) so probably would'nt have wanted to push it much further anyway on a daily. Ran fine on stock tune, wanted a bit more ignition timing than standard cams, probably net ~ 10-15kW so they are a good option. Factory turbo’s and N/A's run the same cam profile just slightly different cam timing (at least with the R33's anyway) I think the neo's run less lift on the exhaust or something; Either way, you could probably make decent power on a turbo camshaft/aftermarket after some cam timing adjustment on the dyno

Edited November 15, 2011 by SKiT_R31

[Super Drager]

In my opinion, if you're a p plater and you have the cash to do it, go for it. A mates SSS pulsar previously had a catback, pod & chip and was slow as anything compared to my 300ZX, recently he rebuilt it and now has shaved the head, HD valvesprings, Tomei poncams and stays at my rear bar till a good 120kph. If i wasn't so close to getting my full licence i'd do cams for sure. I was going to go 264 deg 8.9mm lift from 240 deg 8.5mm lift.