1971 Datsun 521

[Zonargx]

Also is that a good prices for that single side daft kit?

[datzenmike]

Maybe the cause. Take a look at the impression the head made in the old gasket. Can't be more that a few mm. I used 1/2" copper pipe and slip with hacksaw. I think 1/2" long.

 

33 minutes ago, mainer311 said:

There is never a time that I won’t replace the stock head bolts with ARP studs if I’m in there mucking around already. You get way more clamping force on the head gasket, and a significantly less chance of stripping the block.

 

True, but 60 ft lbs is 60 ft. lbs and how many times is this head going to be removed in it's life time? 2 or 3? so the threads in the block are safe enough. It's definite more assurance than insurance. 

 

 

9 minutes ago, Zonargx said:

Also is that a good prices for that single side daft kit?

With manifold I think so. Don't expect too much improvement over a downdraft. Worth it for the sound.

[mainer311]

Zcardepot has the alignment dowels:

https://zcardepot.com/products/engine-cylinder-head-dowel-pin-oem-nissan?variant=19280203415665&currency=USD&utm_source=google&utm_medium=cpc&utm_campaign=google+shopping&gclid=Cj0KCQiA48j9BRC-ARIsAMQu3WRBqPLhsQ-UaqwPyubXngmqHA02pJ28Hqxhu8WBw8rVB0e_M70CB3caAozrEALw_wcB

 

Also, talk to @Crashtd420 about that single side draft kit. He runs a similar setup.

 

Edited November 17, 2020 by mainer311

[Zonargx]

I’m not looking to get crazy improvement or any additionally improvements just want to have a new carb and to make it look nice and clean also the sound it’s greatly appreciated haha.

[Zonargx]

One thing I’m questioning is do we end up eliminating that pipe that’s on the side of the block and also the coolant pipe that goes into the old manifold ? I guess I do have to talk to @Crashtd420 for help on that

Edited November 17, 2020 by Zonargx

[datzenmike]

That's the block vent and it is usually connected to the PCV valve on the intake. I doubt that intake has a threaded hole for that but it is very important for drawing out combustion gasses and moisture keeping your oil cleaner longer and extending oil changes out to 5K miles. 1950s engines didn't have a PCV and they had oil changes every 1-2K miles. Myself, I would drill a hole and thread it, take the PCV off the old manifold and put on the new, and connect it to the block vent. You can run without it. Below... there is a threaded hole on the right side top for a vacuum source for the brake booster (that you don't have) that could maybe fit a PCV valve into. It should be in the middle so all cylinders get some of the blow by but....

 

 

The old intake had a hose coming out at the front base of the down draft. Just seal it off, you can't use it on the side draft.

 

[Zonargx]

You guys recommend just running one of those other Webber don’t know what they are just know you guys mention numbers like 32/32 and will that require a new manifold?

Edited November 17, 2020 by Zonargx

[mainer311]

3 minutes ago, Zonargx said:

You guys recommend just running one of those other Webber don’t know what they are just know you guys mention numbers like 32/32 and will that require a new manifold?

A Weber 32/36. You use your existing manifold, with an adapter plate.

[Zonargx]

 

what are the differences?

[Zonargx]

Nevermind hahaha one is manual choke and the other electric haha

[mrbigtanker]

Those carbs are junk look for an older Italian or even Spain made one. Your in California plenty if you just look.

[Zonargx]

Found one on eBay for $299 it’s says genuine Italian design made in Spain? Is that on better?

[mrbigtanker]

1 minute ago, Zonargx said:

Found one on eBay for $299 it’s says genuine Italian design made in Spain? Is that on better?

Its better than china junk. Offerup and see if any there for cheaper and get a rebuild kit.

[Zonargx]

Wait your the guy with the bad ass wagon with red interior?

[mrbigtanker]

1 minute ago, Zonargx said:

Wait your the guy with the bad ass wagon with red interior?

Shhhhh and 1800SSS coupe and even. more awesome 521 truck being built. Keep that to yourself though. shhh

Edited November 17, 2020 by mrbigtanker

[Zonargx]

Hahahaha looking towards to that 521 haha

[mrbigtanker]

Just now, Zonargx said:

Hahahaha looking towards to that 521 haha

Let me know if you need help, I unfortunately know just about everyone.good and bad all in one.

[mainer311]

You need the K657 kit for manual choke. Get it from Pierce Manifolds if you’re in CA.

[Zonargx]

Ok thanks guys 

[Crashtd420]

10 hours ago, Zonargx said:

 

what are the differences?

Hey mainer311 it looks like hes on a pierce manifold listening but its saying China made?????

 

Is pierce manifold selling junk now?

I suspected they were selling Chinese jets on ebay under a different seller ...

 

Zonargx just make sure what you buy is a genius weber no matter who you get it from.....

[Crashtd420]

Zonargx where are you coming up with that listing?

This is pierce manifold 

https://www.piercemanifolds.com/product_p/k657.htm

 

And the proper kit, notice the price difference.....

[Zonargx]

I’m going to be putting my truck together tomorrow. Head is out of the machine shop with fresh seals and everything else needed to put back on the l16. I also found another l20b engine number says u67 with a w58 head on it. It has the distributor and what looks like a 32/36 really dirty and rusty for $150

[Zonargx]

That l20 has everything on it. Intake and exhaust manifold and alternator with brackets. I’m planning on getting it and rebuilding it as a project with my oldest daughter age 7 who really seems interested on how I fix my cars haha. Would be nice to have her learn some basic stuff

[mainer311]

I’m doing the same thing right now. Slowly piecing together an L20b as a winter project.

[Zonargx]

On 11/16/2020 at 7:53 AM, datzenmike said:

 

Looks like small hose from head is connected to the return to the water pump. NEVER do this unless you block the flow. The heater shuts off flow when not using it. What happens is very hot water from the head is passed directly back into the engine without any cooling from the heater core. This hot water is by-passing the radiator and straining the cooling system in the summer.

 

 

I had the L20B in my truck do this but it was spitting out steam. Same exact spot.

 

 

 

 

Yea you mean the hose that’s on the back right side of the head to the 3 port part by the water pump ? That’s blocked off in the middle