VJR 4 BR 18 Distributor

[dave1]

I'm trying to find more information about this distributor type
VRJ 4 BR 18. Will it give better performance on a 30hp engine with a pecco supercharger, etc. Thank you Dave

[tasb]

It could, if it's in good working order. The VJ 4 BR 18 was originally installed on 1957- 1963 Porsche 356. It delivers close to a full 30 degrees of advance so you'll want to static time at top dead center.
_________________
Roads Scholar &
1957 Kombi low mileage 36 hp governor equipped M 178 Slow Drag Winner 2014, 2015, 2018

1965 hardtop Deluxe Microbus owned since 1990 M 620 factory 12 v 1500cc

1961 (October)Single Cab- Road Trip Workhorse

[Glenn]

The BR18 is not suitable for a VW engine... too much advance and too aggressive a curve.

You want a 010 (0231 129 010). I've sold a number of 010s to customers with Judson, Pecco and Schrock super chargers.

Judson

Schrock

_________________
Glenn
74 Beetle Specs | 74 Beetle Restoration | 2180cc Engine
"You may not get what you pay for, but you always pay for what you get"

Member #1009

#BlueSquare

[John Moxon]

[Glenn]

[JeeWee]

Hi there, I know Glenn is very knowledgeable regarding distributors... but...

I do run a BR18 on my 1192cc WW okrasa engine and runs perfectly, I use it as a daily driver, go on holidays / meetings so long roadtrips, and it does not run hot and you can cruise perfectly. It has about 10 degrees before top dead centre static timing and pulls very nice, and do have a good MPG on it as well, and I drive it like I stole it. It is dyno'd and has 58 SAE HP.

So it will run very well on a VW motor (also runs on a porsche motor so why not on a VW engine)

Specs stolen from the internet:

VJR 4 BR18: The unit provided a total of approximately 15 degrees advance at 1500 rpm as measured at the distributor, 30 degrees at 3000 rpm at the crankshaft.

the so called famous 010: providing approximately 10 degrees advance at 1400 rpm as measured at the distributor, 20 degrees at 2800 rpm at the crankshaft.

So yes, it is more agressive but if I was you I really would give it a try, you will be surprised! Of course you can also follow the route everyone takes, what you like.

[tasb]

I agree wtih you JeeWee but, I would closely monitor that VW engine temperature with this distributor installed at 10 degrees BTDC static giving you 40 degrees of spark advance.
_________________
Roads Scholar &
1957 Kombi low mileage 36 hp governor equipped M 178 Slow Drag Winner 2014, 2015, 2018

1965 hardtop Deluxe Microbus owned since 1990 M 620 factory 12 v 1500cc

1961 (October)Single Cab- Road Trip Workhorse

[Glenn]

The BR18 has 31-32* advance, measured at engine speed. that means if you want a total of 32* the static timing is at 0*. First off that will be a bit hard when starting. Also at idle (700rpm) it's already advanced.

What you're doing is chopping off the first 1/3 of the curve.

If you time it at 7.5* at idle it will run HOT on the highway.
_________________
Glenn
74 Beetle Specs | 74 Beetle Restoration | 2180cc Engine
"You may not get what you pay for, but you always pay for what you get"

Member #1009

#BlueSquare

[JeeWee]

maybe I am wrong about the static timing... have to check that tomorrow, but for sure it does not run hot on the highway where i normally run 60-65 mph, have done quite some highway already during roadtrips and am monitoring the temperature closely... so let me come back on the static timing.

I have had the distributor checked on an old school sun distributor timing machine and it was indeed spot on 32 degrees advance.