Lozer Posted April 24, 2009 Report Share Posted April 24, 2009 both with stock intake. which is goign to be better on an l20b and no i dont care about fuel usage. Quote Link to comment
banzai510(hainz) Posted April 24, 2009 Report Share Posted April 24, 2009 SUs IF you have a good pair.Most are worn out junk. 32/36DGVs Maint is Ezer on the Webers. There is a 38DGES that would be good. Both butterflys open at same time. off idle is hard to get used to sometimes but i had one on a L16. maybe just a little to0 big but maybe perfect for a L20. Quote Link to comment
Lozer Posted April 24, 2009 Author Report Share Posted April 24, 2009 thanks Hainz. I figgure the ones im being given are gonna be crap anyhow Quote Link to comment
240ADAM Posted April 24, 2009 Report Share Posted April 24, 2009 I would go with the weber, its way easier. For the hassle of SU's you don't get much more performance than the weber any way. Quote Link to comment
ggzilla Posted April 25, 2009 Report Share Posted April 25, 2009 Go with stock Datsun twin Hitachis. They look 10x cooler than a single weber downdraft. Quote Link to comment
Lozer Posted April 25, 2009 Author Report Share Posted April 25, 2009 when i get em ill slap em on and see if there worth the trouble. If they are ill polish the shit out of em and make em a show piece. Quote Link to comment
zerow Posted April 25, 2009 Report Share Posted April 25, 2009 I say the SUs, if fuel economy is no object. You are feeding 4 cylinders with two separate carburetors. The carburetors are 38mm diameter and directly inline with the way the engine gets fed anyway. The downdraft 32/34 is obviously smaller in the diameter department, and non-synchonous (do not open at the same time) like the SUs are setup. The downdraft a/f mixture has to make the 90 degree bend to get the air/fuel mixture into the combustion chamber (which, some argue, is helpful for the mix process) As for the junk department, any SU can be fixed to near-new condition, depending on the condition of the SU bodies. Go with the SUs. Quote Link to comment
Wharf Rat Posted April 26, 2009 Report Share Posted April 26, 2009 Hands down the SUs are the way. I used to work on MGs and swap out peoples SUs for the Weber and mani they bought and laugh after they left. I would tell them what I thought and some would let me tune, rebuild as ness. Check for play in the shafts, if worn they tend to suck air there and nice idle would be a problem, they can be redone though. On the other hand the weber is a simple reliable carb it just not a better performing set up. People tend to buy the name when the Weber side draft made the name great. Not the down draft. Quote Link to comment
Lozer Posted April 26, 2009 Author Report Share Posted April 26, 2009 ok i got em they dont have much play in the shafts but i have 1 question. can i just connect the fuel return line or block it off? Quote Link to comment
Lozer Posted April 27, 2009 Author Report Share Posted April 27, 2009 can someone throw up a pic of the plumbing involved in installing these. Quote Link to comment
Lozer Posted April 27, 2009 Author Report Share Posted April 27, 2009 ALRIGHT up and running now it's tune time. anyone know a good spot to score some air horns? Quote Link to comment
zerow Posted April 27, 2009 Report Share Posted April 27, 2009 ALRIGHT up and running now it's tune time. anyone know a good spot to score some air horns? What style are you looking for?? Old school "horn shape"? or more like these velocity stacks? 8th picture down: http://forum.ratsun.net/showthread.php?t=5347 I got my velocity stacks from a British Shop (APT) in Riverside California. Quote Link to comment
hang_510 Posted April 27, 2009 Report Share Posted April 27, 2009 http://dimequarterly.tierranet.com/tech/SUTech/sutech.html Quote Link to comment
Lozer Posted April 27, 2009 Author Report Share Posted April 27, 2009 sweet guys thanks for the heads up. Ill most likely be doing yur air filter mod too. Quote Link to comment
Wharf Rat Posted April 28, 2009 Report Share Posted April 28, 2009 How ya makin it? Quote Link to comment
Lozer Posted April 28, 2009 Author Report Share Posted April 28, 2009 The more i think about it i might go a different route. Im thinking one wide housing made out of sheet metal i get from HD cut to fit a random filter from kragen with a lexan (clear top housing) adhesive pieces to keep the filter in location. Ill post pics when i start. Quote Link to comment
zerow Posted April 28, 2009 Report Share Posted April 28, 2009 The more i think about it i might go a different route. Im thinking one wide housing made out of sheet metal i get from HD cut to fit a random filter from kragen with a lexan (clear top housing) adhesive pieces to keep the filter in location. Ill post pics when i start. Be careful for the "random" part, wouldn't want it to go the way of the sunset... Rumor has it that the Subarus out of the early 80s have a decent oval air filter, could be something to look into. Then, of course, theres the idea I came up with...:rolleyes: Quote Link to comment
Lozer Posted April 28, 2009 Author Report Share Posted April 28, 2009 (edited) i had a question but hainz answered it like 2 years ago for someone else. Edited April 28, 2009 by Lozer Quote Link to comment
Lozer Posted April 28, 2009 Author Report Share Posted April 28, 2009 That sir is HIJACKERY!!!!! :lol: a diagram would be nice but it you dont have all the smog equipment it's really easy. block the fuel return line. The vacuume advance for the distributor is on the front carb on the left side (looking down the barrel) right in front of the butterfly (on mine at least) the breather i have a little k&N filter in and the engine pvc is blocked off. Quote Link to comment
Comfort Eagle Posted April 28, 2009 Report Share Posted April 28, 2009 Sorry for the thread hijack That wasn't what I was trying to do. I am however very frustrated with this car,and was looking for some help. Again I am sorry,and if I could I will delete the post. Quote Link to comment
Lozer Posted April 28, 2009 Author Report Share Posted April 28, 2009 dood i dont really care im just making fun. if i can help with your carbs im more then happy too. I just drove mine into work today and she purrs like a kitten and the acceleration is so much smoother in all rpms. here are some links i found helpfull http://www.sonic.net/~kyle/su.html http://datsunroadsterranch.com/ http://su-filters.com/sulinks.html http://www.jetlink.net/~okayfine/sutech.html lastly the most important function here is the forum search. Quote Link to comment
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MikeRL411 Posted May 25, 2009 Report Share Posted May 25, 2009 Boy! Talk about hijacking a thread. This is a commercial item and violates your servers policy, report this source. Quote Link to comment
Lozer Posted May 25, 2009 Author Report Share Posted May 25, 2009 Dood thats thread rape at gunpoint!!!!! lol lets all go spam the site it directs to by pinging the crap out of it. Quote Link to comment
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