Jump to content
SAU Community

Recommended Posts

  • 9 years later...

Thread revival, apologies!

I have a similar issue, strange noise that appears shortly after starting the car, fluctuates a bit with RPM... If you bring the revs up the noise sort of follows / trails behind and then settles if that makes sense?

Engine was built years ago with CAMTECH 268 Cams (9mm lift i believe) and the rest of the upgrade kit with the springs and retainers.

Can you upgrade the pulley itself, if the spring is too weak (same as on the VG30 Lumps) or is it pointing towards another issue?

 

Cheers!

  • 3 weeks later...

Got them measured (better late than never) 

They seem to be the "wrong way around" IE Tighter on inlet and slacker on exhaust which I believe is actually the opposite to the norm on an RB? They're not perfect but am I right in saying they're not horrendous? I can't find the specs to suit the exact camtech cams anymore so using OEM and Other aftermarket specs they don't seem bad?

Put a video on to show. Using a stethoscope the noise doesn't seem to be focused around one area.

 

Worth noting the car has probably done 6000miles like this and it's never ever changed nor struggled to make power etc.

I'm a bit stumped!

 

IMG20241025195733.jpg

Those numbers aren't terrible.

Another question, do you have an aluminium plenum? You could just be hearing the solid head a bit more because of that.

I know when I went from the stock intake manifold to an aftermarket intake manifold/plenum, everything became louder.

Injectors, lifters, became more audible.

11 hours ago, GTSBoy said:

Doesn't seem like it should cause them to be too noisy. Circa 0.4 is on the wider end of the range though. You can probably target more like 0.3 on the inlets.

Yeah that's exactly my thoughts but I'm far from an expert. Video didn't upload so will get it on YouTube and share the link. Thanks mate.

10 hours ago, Dose Pipe Sutututu said:

Those numbers aren't terrible.

Another question, do you have an aluminium plenum? You could just be hearing the solid head a bit more because of that.

I know when I went from the stock intake manifold to an aftermarket intake manifold/plenum, everything became louder.

Injectors, lifters, became more audible.

Yeah as above really they're not horrible numbers are they! 

And it's on a greddy inlet. Has ID1050x that are quite noisy but tbh it did this on the older injectors. Lots of noise comes from the injector rail too.

56 minutes ago, Toff said:

Thanks for that, it actually sounds fine to me.

What oil weight are you running and what kind of oil pressure do you see around idle RPM and a bit over it?

I'm going to vote for considering going to the effort to close the lash down to the minimum. My bro-in-law got around to checking the clearances on the 3SGE in his Caldina. Was a bit fat all over. New shims at lowest allowable lash, and the car is remarkably better to drive. It appears that the increase in both total lift and duration that you get from doing this is worth a lot more than you might expect.

I have been having evil (and expensive and time consuming) thoughts about doing it to mine, and I don't even think I have a problem. Not that I'd know, though.

On 10/26/2024 at 1:01 PM, Dose Pipe Sutututu said:

Thanks for that, it actually sounds fine to me.

What oil weight are you running and what kind of oil pressure do you see around idle RPM and a bit over it?

Yeah most people that have heard it said it was fine but it's always had me slightly worried.

Oil pressure I can't remember off the top of my head but it has plenty, I run 10w60

On 10/26/2024 at 1:04 PM, GTSBoy said:

I'm going to vote for considering going to the effort to close the lash down to the minimum. My bro-in-law got around to checking the clearances on the 3SGE in his Caldina. Was a bit fat all over. New shims at lowest allowable lash, and the car is remarkably better to drive. It appears that the increase in both total lift and duration that you get from doing this is worth a lot more than you might expect.

I have been having evil (and expensive and time consuming) thoughts about doing it to mine, and I don't even think I have a problem. Not that I'd know, though.

You're probably right mate, best get ordering some shims!

Guessing Nissan is the best place for them?

7 hours ago, Toff said:

Guessing Nissan is the best place for them?

I dunno. Maybe. There's a crowd here in Oz called Precision Shims that I'd probably look to first. Although NIssan might be surprisingly cheap enough.

Trouble with the process is you have to take all the existing shims out to measure them to know what you need to order.

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

    • Major thread necro but how bad of a job is it to DIY? Looking at it online it looks like if you reuse your ring and pinion as long as those are in good condition it should be fine to just pull the axles/front cover and replace the diff that way? Or should I be replacing everything and doing preload measurements/gear mesh testing like the factory service manual mentions for the rear diff?
    • in my list I had the R33 GTR as the best Skyline. Infact I had all GTR's (33>34=32), the NSX, the GTO, the 300ZX, the 180SX, the S15 better than the FD RX7. I had the MR2 and the A80 as 'just' better. I also think the DC5R Integra looks better but this is an 01 onwards car. I also think the FC>FD. It's almost like aesthetics are individual! The elements @GTSBoy likes about the FD and dislikes about the 180 are inverse in my eyes. I hate the rear end of the FD and it's weird tail lights that are bulbous and remind me of early hyundai excels. They are not striking, nor iconic, nor retro cool. The GTO has supercar proportions. I maintain these look much better in person (like the NSX) especially with nice wheels and suspension which is mandatory for all cars pretty much. Some (or all) of these you have to see in person to appreciate. You can't write a car off until you see one in the flesh IMO. Like most people we probably just like/dislike cars which represent certain eras of design or design styles in general. I also think the 60's Jag E type looks HORRIBLE, literally disgusting, and the 2000GT is nothing to write home about. FWIW I don't think the Dodge Viper Gen1's have aged very well either. You can probably see where I rate bubbly coupes like the FD. I know we're straying now but the C4 and C5 absolutely murder the Viper in the looks department as time goes on, for my eyes. Wouldn't surprise me if people who love the FD, also love the MX5, Dodge Viper, Jag E Type, etc etc.
    • I used to hate R31s, and any of the other Nissans that led up to it, and any of the Toyotas with similar styling, because of the boxiness. They were, and remain, childish, simplistic, and generally awful. I appreciate R31s a lot more now, but only the JDM 2 door. The ADM 4 door (and any other 4 door, even if they are unique compared to our local one) can eat a bowl of dicks. The Aussie R31 is also forever tarnished by their association with stereotypical bong clutching Aussie R31 owners of the 90s and early 2000s. I think the Nissans of the 70s (other than 120Y/180B/200B) are far superior looking to the 80s cars. The 240K era Skylines are boss. The same is broadly true of Toyotas. Hondas don't ever register in my thinking, from any era. Mitsus are all horrid shitboxen in any era, and so also don't register. Subarus are always awful, ditto. Daihatsus and Suzukis also don't generally register. They are all invisible. I think the SW20 MR2 looks fiddly. The 3000GT/GTO is like that but way worse. Too many silly plastic barnacles and fiddly gimmicks ruined what could have been a really nice base shape. Kinda-sorta looks like a big heavy ST165 Celica coupe (and I'm not sure if that's a good thing or a bad thing). I think the 180SX is dreadfully bland. It's not bad looking. But it has no excitement to it at all. It's just a liftback coupe thing with no interest in its lines, and bad graphical elements (ie wide expanses of taillight plastic on the rear garnish). The S13 Silvia is a little better - getting closer to R32 shapes. But still....bland. S14? Nope. Don't love it. S15...a little better. Probably a lot better, actually. Benefits from not being like a shrunk in the wash R34 (where the S13 was a shrunk in the wash R32 and the S14 looked like a Pulsar or something else from the stable on Nissan mid 90s horrors). The Z32 was hot as f**k when it came out but hasn't aged as well as the A80. Keep in mind that I think the R33 is the most disgusting looking thing - and out of all the previous cars mentioned is objectively closest to my precious R32. It's just....real bad, almost everywhere you look. And that is down to the majority of what was designed in the 90s being shit. All Nissans from that era look like shit. Most other brands ditto. In that context, the FD absolutely stands out as being by far the best looking car, for reasons already discussed. Going behind the aesthetics, the suspension alone makes it better than almost any other car.  
    • If they just called it the "Mazda Tiffany", it would have been spot on.
    • Yup but for me its the HR ! Cut my teeth on the old holden 6s in the day ! And here's me thinking in the day it was also the 300ZX and the Mitsubishi GT3000 ! All, as well had good lines, but always seemed to need finishing off, style wise.
×
×
  • Create New...