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   All Posts (ddgonzal)


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Re: B310 SGX-E Wagon build
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Looks good. That's the 1980-1981 rocker cover

Posted on: Yesterday 23:54
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Re: piston ring gap
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Quote:
Top/first piston ring gap from cyl. 1-4 in thou is 13, 14, 14, 15. Second ring gap measured at 16, 15, 16, 17.
This would seem to be out of specification
0.002" variation among gaps is OK, the factory specs allow a range larger than that

But are they all too tight, or all too loose?

Often when fitting rings you must manually gap them. This involves pushing the down in the cylinder a certain distance (evenly from top), measuring the gap, and if it's too much, filing one end of the ring until the gap is in spec. But first ensure that the bore is within spec. It might be too tight for your pistons (check piston-to-bore clearance)

On the other hand, if your bore is honed-out slightly larger than spec, the ring gaps will be too big

That's for normal rings. You can buy gapless rings, but recent talk is that these make less HP than normal rings ...

Posted on: Yesterday 10:00
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Re: Main bearing clearance, piston ring gap.
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* 0.020mm minimum clearance
* 0.025mm minimum clearance
Either way, your measurement matches the spec -- it's not less than .020 and it's ALSO not less than .025. The maximum clearance is 0.062 and yours is less than that. All good

Posted on: Yesterday 9:38
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Re: Jetting Twin Dellorto's DRLA in A15
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Yes. Be careful while you are tuning, don't let the engine ping/rattle

Posted on: 2/17 23:18
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Re: Jetting Twin Dellorto's DRLA in A15
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That's the easy part. For ballpark correct A/F ratio:
* main jet is 4x venturi size = 132
* air jet is main jet + 50 = 182

Now for the hard part: transitions ... when the throttle changes, how much fuel it requires it differs with different engines and camshafts. These seem like a good starting point:
* Emulsion Tube: 7772.6
* Idle Jet: 40; air bleed: 7850.1

To be "safe" means make sure the A/F ratio never goes lean (lean = above 14.7:1). That means starting rich, later when you tune the carburetor you'll lean it down to best performance. Best full-throttle power: 12.5:1 ratio. Best cruise: 14:1. Best economy @ level cruise: around 15:1

Posted on: 2/17 22:25
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Re: WTD - Transmission bolt-pattern in CAD
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It's not in CAD, but here is the factory blueprint

Open in new window

Posted on: 2/17 19:30
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Re: Jetting Twin Dellorto's DRLA in A15
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The most important thing is: Venturi Size. All the other setting depend on it. Jetting for 32mm venturis differs from jetting for 28mm venturis

Posted on: 2/17 2:07
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Re: 4-5 STUDS
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The next easiest way to is to redrill the hubs & axles. However the 1200 front hubs and most Datsun hubs are optimized for light weight and so there isn't enough metal to redrill them for example this Stanza hub look like you could redrill them
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until you turn it over, and see there is no space for drilling a new PCD
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So you could change the struts. S14 struts with the 5-lug hubs (5-on-114.3) will work on a 1200

Dunno if the rear axle flanges can be re-drilled. If not you can swap the rear axle assembly, e.g. use a shorted Falcon rear (5x114.3) or something

Posted on: 2/16 22:51
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Re: someone has to buy this datto v8 original
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There's one of these in town

Nissan G50 "President"
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276hp

The US version is fairly common (Nissan G50 "Infiniti Q45")

Posted on: 2/16 10:03
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Re: 4-5 STUDS
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Very easy ...

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Posted on: 2/16 9:50
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