2058cc Build

[brewsy]

Hi Nate,
Remind us all again what oil cooling and filtration you're currently using?
All stock tinware and cooling fins in place? Doghouse shroud? If so is the 'hoover bit' in place?
Tinware rubber all sorted and leak free?

Ta

[V8Nate]

Hi Nate,
Remind us all again what oil cooling and filtration you're currently using?
All stock tinware and cooling fins in place? Doghouse shroud? If so is the 'hoover bit' in place?
Tinware rubber all sorted and leak free?

Ta

New stock cooler in a 36hp shroud(can't fit a doghouse unless i remove the decklid hinges due to a trans raise) all the tin is in place and tight including the hoover bit. The shelves have been raised and the seal is in that channel but the area around the rear piece of tin(crank pulley side) doesn't have a channel so it is jammed between the tin and body. I have read somewhere that the earlier bugs suffer from not having enough air intake space to supply the larger fan so people go with vert decklids to get more air. I did notice with the decklid shut completely the oil temps do go up

[V8Nate]

Oh yeah its also full flowed with -8 ptfe lines and a schadek 26mm ff pump from cb

[brewsy]

OK,
So there are MUCH more experienced people out there than me but from what I know/hear the 36HP style isnt as good at flow and directivity than an OG doghouse.
Does this 36HP therefore have the cooler inside the shroud and therefore obstructing airflow to 3&4?
With the trans raise you may have more areas for air to leak past the seals.
A 2058cc machine is almost certainly going to need more air both for the carbs and cooling so louvres or a top prop may be needed to get more air in but if you want to run the lid closed then I think an external cooler (and possibly thermostat to help on cold starts) is a must!

See what the others think...
Cheers

[V8Nate]

Thanks brew I have read how the 36hp style isn't as efficient but its what I have to run. The cooler is offset not like the older single relief engines. I'm pretty pleased with the block temp only getting to 200°f after running it at 75-90 for a solid 45 minutes straight and head temps are looking good just gotta get the oil temps down now

[Schweg]

What ring and pinion do you have?

Car looks awesome by the way.


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[V8Nate]

What ring and pinion do you have?

Car looks awesome by the way.


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Thanks:) 4.12 with .88 4th(Wright pro Street freeway flyer)

[Schweg]

What ring and pinion do you have?

Car looks awesome by the way.


Sent from my iPhone using Tapatalk

Thanks:) 4.12 with .88 4th(Wright pro Street freeway flyer)

Thanks!

I’m at the same rpm at 7” though I have never figured out what ring and pinion I have. Now I have a general idea.


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[V8Nate]

What ring and pinion do you have?

Car looks awesome by the way.


Sent from my iPhone using Tapatalk

Thanks:) 4.12 with .88 4th(Wright pro Street freeway flyer)

Thanks!

I’m at the same rpm at 7” though I have never figured out what ring and pinion I have. Now I have a general idea.


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You betcha. If I remember correctly my front tire size is 155/80r15 which is as close to the stock 165r15 tire. When I checked with GPS it says the speedo is 1 mph fast at 70(so id be doing 69)

[Schweg]

Sounds right. I have a normal tire and gps they are real close.

And 1mph isn’t a deal breaker.


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[V8Nate]

Close enough for me:)

[brewsy]

If I remember correctly my front tire size is 155/80r15 which is as close to the stock 165r15 tire. When I checked with GPS it says the speedo is 1 mph fast at 70(so id be doing 69)

Nate,
Im positive that 155/80 IS the stock size tyre for a Beetle. Check here:
https://www.longstonetyres.co.uk/classi ... tyres.html

A 1mph difference is better than any modern speedo as they all under-read to stop people from 'actually' speeding...

Most peeps use 165 as that's the easiest to now get hold of, gives slightly more meat on the road and are way cheaper than 155's

Cheers

[V8Nate]

So one thing I've noticed with these carbs is that the throttle plate has to be opened past the "maximum 1/2 turn" according to the weber manual to get it to idle above 400rpm. Which in turn causes the progression ports to be exposed giving me a really rich condition barely on the throttle. I think I have 2 options that theoretically work in my head but would like some input.

Option 1 would be to set the idle speed screw at about a quarter turn past closed and adjust the air bypass screws to get the idle where id like it.

Option 2 would be using the open port on my vacuum block and hook that up to the top of my breather so its pulling vacuum out of the crankcase. The breather box/oil fill tower has baffles and i also put some scotchbrite in the top to collect the oil vapors to keep the oil in the motor. The hose is going to atmosphere and does not put out oil whatsoever just not sure what it would do under vacuum

[66brm]

I would try the bypasses first, otherwise you may need to drill a small hole in each butterfly to bring the idle up. Before you do though check your idle timing

[V8Nate]

Finally back at it, just sold my old house and bought a new one on a couple acres last month so now that is done and I can get to my tools and bug yesterday was a nice day for tuning:) So I have hooked me breather box to full time vacuum which allowed me to lower my idle speed screws to a quarter turn but that did not fix the over rich condition on light cruise.

To freshen memories im running dual 40 idf's with 32 vents. I currently have 55 idles, f11 e-tubes, 180 a/c's and 130 mains. The problem is no matter the rpm at cruise(or very light steady throttle) im hitting 10.8-11.9 afr. I tried 50 idles and it kept the afr's towards the 11.9 side but way lean on tip in and average driving. I tried going down to 120 mains but it made it way too lean on the top end(I could probably use 135 mains to be honest) I just can't figure out this rich cruise situation, I have messed with jets, fuel pressure and float height but nothing will cure it.

I'm not sure what else I can do to cure this and I don't want to put more money into these carbs as fuel injection is in its future but I don't want to be running it that rich while trying to drive it like a normal person