Datsun P510 - L16 - Weber 40 dcoe swap

[kturbosolutions@gmail.com]

Hey Guys,

 

I need some help on my Datsun 510.

I want to swap from normal carb to Weber 40 dcoe twin carb.

What do I require for this swap?

 

Please help!!

 

Thank you

 

cheers

 

Changez 

[dr.feltersnatch]

Dual 40s sounds like a bit much for sn l16

[kturbosolutions@gmail.com]

 

Dual 40s sounds like a bit much for sn l16

Is too much? hmm, I thought this is like the normal swap?  :confused:

anyone driving here with dual swap?

 

I am not so familiar with Carburator cars, so would be gratefull for any good advice and help.

[DanielC]

This is basic, but a fuel injected engine pretty much squirts a precisely metered amount of gasoline on top of the intake valve of each cylinder, and has an O2 sensor to correct any problems.

 

A carburetor depends on the air speed flowing through a venturi, to suck the right amount of gasoline into the air, and hopefully not have it settle out by the time the air and fuel get to the cylinder. 

If the carburetor throat, or venturi is too big, air velocity slows down.  Then it becomes harder for the carburetor to accurately meter the right amount of gasoline into the air.  Also, slow air velocities can allow gasoline to settle out of the air, screwing up the fuel air ratio even more.

[banzai510(hainz)]

Where you live at? Austria?

 

40 dcoes will fit if you have the intake manifold. A 1 piece one is the best and 40dcoe carbs with linkage and a way to open the carbs up . a bar linkage or a cable

 

I had 40 mm Mikunis on a stock L18 and was OK but was better when I installed a bigger cam on the motor

[Nuclear Water Boy]

Doable with tons of money into cam, head work, exhaust and compression increase and a good amount of tuning. I once had a setup like this and it ran great but my current NA S14 SR20DE would own it all day long,,and night.

[TENDRIL]

http://www.barnesandnoble.com/w/how-to-modify-your-nissan-and-datsun-ohc-engine-frank-honsowetz/1119499256?cm_mmc=google+product+search-_-q000000633-_-978193112804&ean=9781931128049&isbn=9781931128049&r=1

[scooter]

Itll work fine, do some researching on what venturi size and jets you need to start out with

[kturbosolutions@gmail.com]

so i finally got hold of a pair of weber 40 dcoe. I have someone who can cast me manifold for the twins.

Which linkage would be the best? I have a oem Nikki carb right now with cable.

 

Is it worth installing twin 40 dcoe on my stock l16? do i need to change anything else?

we dont have any parts available here in paki, i have to import everything  :poop:

 

What are the specs for the carbs>

 

Carburettor jetting:
chokes
Main jet
Air jet
emulsion
Idle jet
pump jet

[banzai510(hainz)]

we dont have any parts available here in paki????  Pakistan?????????

 

Mad Dats and datsport in Austraila have manifolds you can buy if you have a Visa card so no need to cast yourself

[datzenmike]

You should be asking how much!!!

[kturbosolutions@gmail.com]

we dont have any parts available here in paki????  Pakistan?????????

 

Mad Dats and datsport in Austraila have manifolds you can buy if you have a Visa card so no need to cast yourself

 

hahaha yeah, the Datsun is in Pakistan right now. I actually live in Austria, but since thereare no 510 there I bought this car in Paki and everytime i come to Pakistan I work on it a lil.

 

The webers i have, were running on a 1.8 / 16v golf engine with following specs

 

Carburettor jetting:

chokes 32

Main jet 138

Air jet 190

emulsion F64 - F47

Idle jet 59F21

pump jet 35

 

 

yeah sure I have paypal and visa, but for the price to get it imported here i can make 4 manifolds. The problem is not the price of the part and shipping, its the custom which f"cks u up.

 

The custom cast manifold will cost me around $100.-, I think its worth taking a try, if not I will buy one on my next trip to Austria.

 

 

so what do u guys say? should i run the twin 40s or a single 40?

[banzai510(hainz)]

I ran 40s on my stock L18. It ran fine but ran better when I but a cam in it.

 

best to just buy a weber 32/36 as its easy to maintain in Pakistan

[Stoffregen Motorsports]

Yeah, dual Webers (or Mikunis) aren't just an easy "bolt on" deal. They usually require more maintenance than one would expect and they can't be optimized without other modifications to the engine. A cam, some port work, bigger valves, a good header and exhaust system, distributor re-curve, etc.

 

If driving pleasure is what you're after, just run a DGV Weber. If you're after a good looking engine bay, then there's going to be a compromise somewhere.

[kturbosolutions@gmail.com]

Which cams do I need if I swap in the 40dcoes?

What else should be modified?

[banzai510(hainz)]

youll need new rocker arms , valve lash pads of a certain unknown size and different size retainer for the lash pads. The size of cam will determine soem of this.

 

Since this car is in Pakistan parts will be hard to get und "Besser Du musst es Vergessen" Kauf ein 3litre Capri sind mehr Kool!!!!!!!

[Stoffregen Motorsports]

 

 

Is too much? hmm, I thought this is like the normal swap?  :confused:

 

This is a classic swap, but they are not just bolt on and go. If this were a vintage Alfa Romeo with a higher state of normal tune, bolting on duals may work fine, but the Datsun was not a highly tuned powerplant to begin with.

 

If you want to keep it simple, I suggest you find one of the old "How to Modify Your Nissan and Datsun OHC Engine"  book and start there. http://www.amazon.com/Modify-Your-Nissan-Datsun-Engine/dp/1931128049.