Jump to content
SAU Community

Recommended Posts

Hay guys,

Im interested in getting a set of cams.. But i dont like putting things in my car if I dont fully understand how and what they will do. So I have a few questions (mechanical explinationes prefered)

What are the complications with getting exhaust and inlet aftermarket cams in a CVT 25DE?

What size's/lift/duration are best for street driving? Anything to enhance Mid AND high range?

How much power will gain with a good tune?

What prices am I looking at for a good set of cams?

Is it worth going overkill and getting massive cams? What are the differences in cams? E.i How and what happens if you increase left/duration?

How do I tell the left/duration?

Will I have to get cam gears?

At what point will I need to go larger injectors?

Thanks in advance guys! :(

Link to comment
https://www.sau.com.au/forums/topic/174108-cams/
Share on other sites

Will have a go at some answers...

What are the complications with getting exhaust and inlet aftermarket cams in a CVT 25DE?

Um, like....?

What size's/lift/duration are best for street driving? Anything to enhance Mid AND high range?

With regard to this motor, not sure.

How much power will gain with a good tune?

Depends on the cam & any other components fitted.

What prices am I looking at for a good set of cams?

About $1k for two. Sometimes more.

Is it worth going overkill and getting massive cams?

No. This will simply remove low & mid range torque & you wont be able to pick up any top end hp.

What are the differences in cams? E.i How and what happens if you increase left/duration?

Lift (not left) is simply the amount by which the cam lifts the inlet and or exhaust valve away from the head. Duration is the length of time (in degrees) that the cam does this for. More duration valve is open longer, more lift valve is open further.

How do I tell the left/duration?

It will be stated by the manufacturer.

Will I have to get cam gears?

Not necessarily.

At what point will I need to go larger injectors?

When you run out of injector flow. Broadly every cc/min in a 6 cylinder equates to a rwhp.

Edited by djr81
Link to comment
https://www.sau.com.au/forums/topic/174108-cams/#findComment-3196502
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • I got back to Japan in January and was keen to get back on track as quickly as possible. Europe is god-awful for track accessibility (by comparison), so I picked up a first-gen GT86 in December just to have something I could jump into right away. The Skyline came over in a container this time and landed in early January. It was a bit battered after Europe, though—I refused to do anything beyond essential upkeep while it was over there. The clutch master cylinder gave out, and so did the power steering. I didn’t even bother changing the oil; it was the same stuff that went in just before I left Japan the first time. Naughty. Power steering parts would’ve cost double with shipping and taxes, so knowing I’d be heading back to Japan, I just postponed it and powered through the arm workout. It took a solid three months to get the car back on the road. Registration was a nightmare this time around. There were a bunch of BS fees to navigate, and sourcing parts was a headache. I needed stock seats for shaken, mistakenly blew 34k JPY on some ENR34 seats—which, of course, didn’t fit—then ended up having the car’s technical sheet amended to register it as a two-seater with the Brides. Then there’s the GT86. Amazing car. Does everything I want it to do. Parts are cheap, easy to find, and I don’t care what anyone says—it’s super rewarding to drive. I’ve done a few basic mods: diff ratio, coilovers, discs, pads, seat, etc. It already had a new exhaust manifold and the 180kph limiter removed, so I assume it’s running some kind of map. I’ve just been thrashing it at the track non-stop—mostly Fuji Speedway now, since I need something with higher speed after all that autobahn time. The wheels on the R34 always pissed me off—too big, and it was a nightmare getting tires to fit properly under the arches. So I threw in the towel and bought something that fits better. Looks way cleaner too (at least to me)—less hotboy, less attention-seeking. Still an R34, though. Now for future plans. There are a few things still outstanding with the car. First up, the rear subframe needs an overhaul—that’s priority one. Next, I need to figure out an engine rebuild plan. No timeline yet, but I want to keep it economical—not cutting corners, just not throwing tens of thousands at a mechanic I can barely communicate with. And finally, paint. Plus a bit of tidying up here and there.  
    • Nope, needed to clearance under the bar a little with a heat gun, a 1/2" extension as the "clearancer", and big hammer, I was aware of this from the onset, they fit a 2.0 with this intake no problems, but, the 2.5 is around 15mm taller than a 2.0, so "clearancing" was required  It "just" touched when test fitting, now, I have about 10mm of clearance  You cannot see where it was done, and so far, there's no contact when giving it the beans Happy days
    • It's been a while since I've updated this thread. The last year (and some) has been very hectic. In the second-half of 2024 I took the R34 on a trip through Germany, Italy, France and Switzerland - it was f*cking great. I got a little annoyed with the attention the car was getting around Europe and really didn't drive it that much. I could barely work on the car since I was living in an inner-city apartment (with underground parking). During the trip, the car lost power steering in France - split hose - and I ended up driving around 4,000kms with no power steering.  There were a few Nurburgring trips here and there, but in total the R34 amassed just shy of 7,000kms on European roads. Long story short, I broke up with the reason I was transferred to Europe for and requested to be moved back to Japan. The E90, loved it. It was a sunk cost of around EUR 10,000 and I sold it to a friend for EUR 1,500 just to get rid of it quickly. Trust me, moving countries f*cking sucks and I could not be bothered to be as methodical as I was the first time around.
    • I assume clearances were all a-okay?
    • Shock tower brace is in +5Kw....LOL  
×
×
  • Create New...