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Dose's Sometimes DIY and Pay Someone Home & Boat Improvement Thread


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In my car the air box is "pretty good" and goes down to the chassis rails, it's fed by a 90mm pipe and is open to the back of the headlight which has cool air moving around it. 

IATs are good under track conditions, any car idling in traffic will suffer. 

Just saying, a sealed airbox is not the be all and end all of for a car in motion - you just need as much external air coming in as possible and that's good enough. 

 

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If I am really bored at some stage, I could install some form of scoop behind the headlight and piping into the pod area, but that's a low priority item until I want to milk every single kW out of the setup.

My goal is to make 500kW at the hub, if I achieve that then I probably won't bother with anything else lol.

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Its definitely doable but application obviously changes things. I have seen 60+ temps with an unshielded pod vs 21C temps idling for a good 60+ minutes in a 21 degree shed.

Same behaviour at 35, 40C days (though obviously the air temp becomes the new ambient) but 0% heatsoak which was really suprising. Enough for me to get an airbox made up (or in progress)

Turbo cars different due to intercooler etc. You really just want to know how close your AIT is to ambient when you're using the car in the manner you care about AIT's in.

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On 1/12/2022 at 12:31 PM, ActionDan said:

60min idle time sounds like bullshit already, zero temp rise sounds like mega bullshit. 

Or faulty sensors... 

Anyway, get an airbox, it will help regardless. 

 

Shrug, same sensor, same car, tested on multiple different days, I watched it live on skype.

This is the airbox. There is a funnel/scoop that draws air from a duct made in the bumper. It is sealed all the way till said duct.

image.thumb.png.eeccd3ecc562775cc313a72dc83f2752.png

The sensor itself was pre-TB, but also tested inside the box (initially) then moved to pre-TB to make sure the reading was right.

It was all done to convince me to buy a box for my own setup, after many times of me going "But my AIT is fine on the track etc etc". Which it very well may be. But then I went for a drive in the hills and my AIT of about 38-45C as over a 2 hour log of spirited driving seemed fine, then I got out of the car and noticed it was cold AF at top of said mountain. Felt to my un-calibrated skin that it was about 10C at most.

Given MCM picked up 25+ kw from dropping air temp from 50C to 33C, it seems like a good idea in my application too, to get those temps as close to ambient as possible. It's entirely plausible we all get dynoed at XYZ KW in a dyno room with the bonnet open, then drive away -20KW due to changing how the engine runs in the real world.

In _my_ application at least, being N/A.

In any case making an airbox fit fully is a bit of a timesink.

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Absolutely. I have 100mm PVC pipe into stock R32 airbox. PVC has bellmouth facing brake duct in GTR bar. Would not contemplate any other intake that backed away from those properties (cold air, only sourced from outside engine bay, rammed in when at speed). Keeping the density as high as possible into the turbo intake is just as important as keeping the density as high as possible after the intercooler.

Bashing a 110mm hole down through the inner guard behind the headlight felt like a big undertaking when I did it back in ~2000 though.

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Boring stuff, subframe out to replace the Hardrace bushes with GKTech offset bushes (to bring the subframe closer to the chassis thus reducing the angle of the LCA this theoretically would mean less toe out ramping on compression. Subframe will be also braced with the GKTech weld in plates.

The lot will be sent and powder coating boring black.

 

IMG-20220112-WA0015.jpg

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On 17/01/2022 at 12:28 PM, Shoota_77 said:

Summernats 2023 Grand Champion?  Would probably go ok in the burnout comp!

Better start drinking shit beer (VB) and get used to the taste of shit beer and better start growing me a mullet.

Business up front, partayyy at the back cnuts!

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On 17/01/2022 at 1:26 PM, Dose Pipe Sutututu said:

Better start drinking shit beer (VB) and get used to the taste of shit beer and better start growing me a mullet.

Business up front, partayyy at the back cnuts!

Do Asians do mullets?  I think you'd need one to stop the paddock full of bogans from tea bagging you! 🤣

Dunno how they'd cop a Skyline full stop.  Not Aussie or Mercan enough.

BTW, nothing wrong with shit beer!

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Now installed, fun times as the GKtech manual makes no mention of modifying the subframe brackets/brace plates. Needed to lop off the hump as the GKtech subframe bushes are flat and don't have an indent.

Heaps of swearing later, it's in 🥳

IMG-20220119-WA0001.thumb.jpg.edc345d65ee39a1462d2ee460b3145fd.jpg

IMG-20220119-WA0003.thumb.jpg.7c41e5c18a2abf1936b7accaf92c016e.jpg

IMG-20220119-WA0002.thumb.jpg.6fedb2b5576114398acb900cd2b2238e.jpg

 

 

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