Hi all i have got my l20 running again with some side draft 40 mikuni,s. My car war running well with a 32/36 dvga weber and extractors timing was spot on.

I have since fitted headers and the side drafts as mentioned and it idles ok, sounds a little rough haven't stuffed a round with them to much yet.

Getting to the point, when i go to rev it up it splutters a bit, flames and pops it has revved up on occasion but Ive shut it down as i am still sorting out linkages (jamming).

My thoughts it could be damaged mixture needles or do i need to play with jets....

have thought of buying a rebuild kit....

anyone had experience with these carb's ?

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wanted 180bsss


http://jandm.bandcamp.com/

Get your linkages sorted first.
Use a center pull cable & set them up similar to the old factory alfa carbs.

You cannot reliably tune side draught carbs until the carbs are synchronised perfectly.

For some years now I have refused to tune side draughts using levers & rods.
They will NOT stay in tune.

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A little knowledge is a dangerous thing.
www.datsport.com

"R.I.P. Baz. 29 April 2022. Thank you for all your contributions to the Datsun community over the years. You will be missed." - OZDAT

As Baz said get them close as possible in sync
set the timming
make sure the jet blocks are tighten down as they can back out due to vibration.

I have Mikunis and I love them.
Find a toyota RG guy he'll know how to tune them up better. main 130 air 160 should be close enough to get running

Backfiring and popping is usually a lean mixture

That's true, but poor sync will give the same effect.

_________________
A little knowledge is a dangerous thing.
www.datsport.com

"R.I.P. Baz. 29 April 2022. Thank you for all your contributions to the Datsun community over the years. You will be missed." - OZDAT

http://www.rmcarburetors.net/index.htm

get in contact with him, and you'll get the best setup available. No Questions asked. If I get back to Goolwa and find the linkage kit I'll sell you the one I had made years ago but only used for a few weeks until I rolled the car.

Cheers
Jordan

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Past rides: 86 Hilux, 3x ke55 rollas's (2coupes,) 2x ST185 GT4's, RA28, TA22, KE10, P610 datto, RT40 corona x3, RT132, MX13.

Current Rolling stock: 2000 model ST215 Caldina, CAA22 celica (race,) RT40 corona (cruiser)