Randalla Posted October 29, 2009 Share Posted October 29, 2009 Just switched out the stock air cleaner on my 1972 240Z with Motorsports polished aluminum air horns with out air cleaners. Because they flow so much more air I am now getting a stumble under full acceleration. Any ideas other than screwing the air mixture out and changing the viscosity (thicker) of the damper fluid? I like the looks of the air horns with out cleaners. The car is not a daily driver so I'm not too worried about dirt. Quote Link to comment Share on other sites More sharing options...
ezzzzzzz Posted October 29, 2009 Share Posted October 29, 2009 Are you already runing SM needles? They provide a richer misture off-idle. As for no filter, it doesn't take a lot of ingested dust and grit to eat up the rings and cylinders. I'd seriously consider a filter of some sorts. Afterall, the hood is down most of the time. You can always pull the filters to show off the horns when showing the car. Quote Link to comment Share on other sites More sharing options...
Guest Rolling Parts Posted October 29, 2009 Share Posted October 29, 2009 ...it doesn't take a lot of ingested dust and grit to eat up the rings and cylinders. I'd seriously consider a filter of some sorts. I agree, the 240Z swirls an amazing amount of dust under the hood because it's so open under the engine. Even parked I notice dust/grit getting on the engine! I think MSA has the filter elements for their horns. Here is a guide I use when deciding on springs, oil viscosity, and needle selection: http://www.zparts.com/zptech/articles/mal_land/ml_sucarb2/SUcarb_111601b.htm Quote Link to comment Share on other sites More sharing options...
Randalla Posted October 29, 2009 Author Share Posted October 29, 2009 Thanks for the advice. The write up by Malcolm Land was hugely helpful! Think I'll check with Motorsports on the filters. Quote Link to comment Share on other sites More sharing options...
zedsn Posted October 29, 2009 Share Posted October 29, 2009 Hi, you can get filter to put over your ram pipes. UZI or company name is something like that. I ran auto trans fluid dextron 3 in my carbs to let the pistons rise faster to get rid of the bog you describe. I didn't have much luck with the SM needles so I went back to stock metering needles. Quote Link to comment Share on other sites More sharing options...
Firepower Posted December 5, 2017 Share Posted December 5, 2017 On 10/29/2009 at 5:39 AM, Guest Rolling Parts said: I agree, the 240Z swirls an amazing amount of dust under the hood because it's so open under the engine. Even parked I notice dust/grit getting on the engine! I think MSA has the filter elements for their horns. Here is a guide I use when deciding on springs, oil viscosity, and needle selection: http://www.zparts.com/zptech/articles/mal_land/ml_sucarb2/SUcarb_111601b.htm I went looking for this article today, and found it here: http://www.zparts.com/zp_html/zptech/articles/mal_land/ml_sucarb2/images4/SUcarb_111601b.htm Quote Link to comment Share on other sites More sharing options...
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