Jay's RB25 240z | Page 7 | The Z Club of Great Britain
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Jay's RB25 240z

Discussion in 'Hybrid Z cars' started by Jay., Sep 4, 2017.

  1. Jay.

    Jay.
    Z Club Member

    Unfortunately it doesn't seem there's any decent exhaust places near me! Every one that I phoned up didn't have an on-site welder - what?!

    I found a small classic car restoration company ~10 mins away from where I live and I booked in there. An outside ramp!

    [​IMG]

    Took <30 minutes to get the exhaust brackets re-welded and some new bushes/bolts. Happy to say that after a quick blast around the Cotswolds it has stayed on :):)
     
    toopy, Ian and Woody928 like this.
  2. Jay.

    Jay.
    Z Club Member

    I've got a couple more weeks off work and the weather was surpringly good - whilst I wasn't really in the mood to drive I decided to start tackling the Dynamat/sound proofing.

    This is just the rear hatch area, and I plan to remove more trim and go up the side, and then move onto the front where I'm hoping to cover the entire floor area, the transmission tunnel and the firewall!

    [​IMG]
     
  3. Ian

    Ian
    Z Club Member

    Don't think you'll ever hear me say that, if it a good dry day I can't wait to go for a drive in the S30. But then I'm only home around 3 months each year so I don't get to drive as often as you.



    You you don't have to have 100% coverage of the deadening material for it to be effective? if you want to save weight. You'd have better results with less coverage with the butyl but instead covering that with some foam and in certain area a vinyl over the top of the foam.

    I aim to keep weight low in mine while still having it pleasant to use on long trips. I plan to use the buytl on each panel with around 25% coverage and then cover that in certain high noise areas with a dual foam vinyl layer. It will be as light as possible while still being very effective.
     
  4. Jay.

    Jay.
    Z Club Member

    I'd be the same 9/10 times too! But it was out of an MOT and I didn't fancy doing the small bits required to get it to pass at the time :p


    Initially I had planned something similar - just putting the minimum required to get the metal to stop vibrating - but apparently full coverage still gives an increase (albeit not as good as the initial 50% coverage).

    To be honest I'm not hugely bothered about weight (in total it'll add no more than an extra 12kg of weight by doing the entire thing) and I want it as quiet as possibl. Plus it appeals to me a lot more.


    Are you putting any thermal lining in at all? I'm thinking of putting some on the firewall and trans tunnel as I can feel the heat during the summer months which doesn't help the cabin temperature at all!
     
  5. Ian

    Ian
    Z Club Member

    The dual butyl and foam deadener I will be using also blocks heat so it will be around the turbo/exhaust side. I also have gold heat reflective tape on the underside where the exhaust passes close to the chassis, I find this to be very effective.
     
  6. Woody928

    Woody928
    Z Club Member

    Is that Silent Coat?

    I'd like to do something to mine bearing in mind how thin the metal is and how much noise it makes on longer journeys. Not so fussed on the B roads but not so great while cruising...
     
  7. Jay.

    Jay.
    Z Club Member

    What brand have you gone for? I was thinking of just using the Dynamat line but they're significantly overpriced
     
  8. Jay.

    Jay.
    Z Club Member

    Yep, I spoke to the guy who owns caraudiosecurity and he swore by it even though he sells both Dynamat, Silentcoat and other brands. He reckons they're all pretty much the same but the SilentCoat is slightly cheaper and the 4mm option is ideal


    Drove the car to the MOT station with just the rear section complete (as in the picture), and it's already made a decent difference. I didn't expect to be able to tell as it was behind me and still a lot of uncovered metal - but I'm thoroughly impressed!!
     
    Woody928 likes this.
  9. uk66fastback

    uk66fastback
    Z Club Member

    I did my fastback in Dynamat and it made a difference to the heatsoak but not the sound, but it was basically too loud whatever you would have used.
     
  10. Ian

    Ian
    Z Club Member

    I have silent coat Butyl and Dodo Mat for the mass loaded vinyl.


    lots of big flat panels back there, they act as drums, so not surprised you noticed the difference as the deadening will have stopped them resonating.
     

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