Need Some Advice On Cam Shafts

[chef_stagea]

hi all.

looking at a set of cams for a 34gtr motor.

they are HKS 256degree 8.7mm lift.

ive had a quick look but cant find if these are a streetable cam or more track.

they are able to go in with no mods to head,

i understand it all depense what they are paired up with in the car,

cheers

[pistol-pete]

They're pretty close to the factory cam specs so they would definitely be good for on the street. I have bigger ones in my gtr (tomei type b's which are 260/9.15)

[chef_stagea]

Thamx pete

[Brezza]

I think these cams are the smallest duration that HKS do as an upgrade.

They'd be a pretty good street cam IMO.

the duration is longer than stock and the lift is better than stock.

from my understanding the longer the duration the later the power will come on, so a 272 degree cam with same lift will come on much later and have some overlap at idle giving it a lumpy idle.

i think 8.7mm lift shouldn't be a worry for the std springs,

is there any reason why you're upgrading cams? are the stockers limiting power?

i've got a stock head and std cams and am pushing 370rwkw so the std ones are definitely good for that level, and idle and response is the best its going to be.

[Munro]

I agree. Why are you looking at cam upgrade. You can get over 400kw at wheels out of std engine before looking at cams.

If you are going to expense of building tough engine from bottom up then small cams waste of time. I jumped straight to

272 10.2 with first engine then 290 11.7 with next. if you are modifying you cant mess around.

Stick with turbos, fuel, etc and leave the cams till you go for it............ I ran 11.10 @127 back in 2002 on the STD engine

with bolt on 2540s and bigger injectors.

Depends what you want but make sure all parts match. 34 engine will make great power with bolt ons.

How fast do you really want to go?

[chef_stagea]

Im after a legit street spec engine. I would say 300 or so at all four wpuld b nice. So say 340rears.

Will i gain much with cams, cam wheels etc? Or is the gain just small b4 the 400 mark?

Lag is an apsolute no no

I was thinking

Stock turbos with upped boost

Fuel pump

Inj

Power fc

Cams

Good turbo back zorst

No need to do intakes as i want it clean...

Dont really need much more power Wise...??

Coolere legit, stock turbos are fine for low to mid range with a decent strenght to hold a bit of pressure

[pistol-pete]

leave the stock cams but get adjustable cam gears and replace the stock turbos with N1's (-7s) or -9s, the standard ones wont last at (and probably wont even make) that power.

also there wont be much if any difference between RWKW and AWKW, certainly not that much at that level

[chef_stagea]

Yeah fair enough,

For low to midrange what would be the better turbo?

[pistol-pete]

Either, the -9s will make slighty more top end but theyre a couple hundred bucks more than the -7s

[chef_stagea]

Would stockies hold much over a bar? (14.5)

[On Edge]

If ur talking standard r34 turbos I've seen them make 294rwkw, but were soon swapped out for 2530's so don't know exactly how long they'd last, but they won't last long at all, best turbo for 350awkw in my eyes would be 2530's. They work real nice with great response for that power on a standard 2.6l Motor

[Krishy]

Screw it, just go twin 3071 setup = massive power

[Munro]

Yep 2530s are the go. Years ago I went to 2540s and they KILLED the respose and bottom end.

I've got -10s now on my 3.2L and they haul ass from right down low but would be a bit lagggy on 2.6L

For 350rwkw you should not need to touch the cams or internals at all. Agree on cam gears though.

Back in the day we went as high as 396rwkw using the std cams and std internals (of course at that power

the std internals did not last long!!!)

[chef_stagea]

Yeah ok, is the 2530 a direct bolt up, and r there diff models? I no that my 2535 ive gpt on stag was a 56t or sumthing??

Has any one got results from

Power fc

Cam gears

Fuel pump

550cc ??? Inj

Airbox seems more than enough and looks nice

Then with 2530s?

Whats the point behind the hard piping cooler kits n

So on? Replacment or a mod!?:s

Excuse my lack of gtr knowledge

Also do 040s fit in easy? Didnt like the looks of the nismo pump at 600 on ebay lol..!

[chef_stagea]

And whats a respectable amount of boost to push threw stock turbos? 15 b fine?

[Damo_R34]

Prob questions better asked in the Forced Induction section

[On Edge]

750 to 800cc injectors would be more suitable for 98 octane

[chef_stagea]

Maybe our good local mate mr sled or nightcrawler could shuffle it over for me ??

[Damo_R34]

Only Nightcrawler can do it, you have to also be a moderator of the forum its going into

[SLED]

The hard pipe kit is a good upgrade over the plastic (shitty) pipes when running above stock boost.

But seriously, speak to Willall (club sponsor) who has done all the homework on these things already and has taken all the guess work out of it.

Martin will be able to point you in the right direction quickly as to what to do.....and more importantly, what not to do.

Do it once...do it right...and save a packet in the long run.