kalium99 Posted December 29, 2003 Share Posted December 29, 2003 I ripped the TB of the L28 intake manifold and noticed that the cold start valve is sticking down about an inch into the air path. This can't be good for air flow I'm assuming. Is it possible to re-locate this somewhere else to improve airflow. Or even use a spacer and raise it up a bit so it isnt sticking so far down. Cheers Quote Link to comment Share on other sites More sharing options...
TomoHawk Posted December 29, 2003 Share Posted December 29, 2003 I would think that it is set that deep into the air flow so the fuel gets carried to the cylinders efficiently. any deeper would spray puddles on the botttom. Higher would be less efficient, but would work. You would need to crank a little longer before starting. Are you sure the hood will clear if you raise it? You might even consider an elbow pipe so the inject lays flat. Quote Link to comment Share on other sites More sharing options...
kalium99 Posted December 29, 2003 Author Share Posted December 29, 2003 Yeah, I thought about having an elbow pipe....but thats a little bit too much hassle for a cold start valve. I've seen plenty of pics of engines with the cold start valve completely gone, so Im sure raising it a bit (if it does clear...never thought about that) wouldn't worry it too much. Quote Link to comment Share on other sites More sharing options...
TomoHawk Posted December 29, 2003 Share Posted December 29, 2003 Bewfore eliminating the valve, try disconnecting it to see how that affects the way the engine starts. Quote Link to comment Share on other sites More sharing options...
preith Posted December 31, 2003 Share Posted December 31, 2003 On my '77 I swapped out the fuel rail with a larger OD one from an '81 turbo. This did not have any fuel pipe for the cold start valve. I just tapped a pipe plug in place of it. The car was drivin until the first snowfall in November, in Wisconsin, without any difficulties that I can remember. I'm sure it's written somewhere, but I suspect the valve isn't really needed until colder temps, maybe below 20 degrees? Phil Quote Link to comment Share on other sites More sharing options...
TomoHawk Posted December 31, 2003 Share Posted December 31, 2003 I bet they put the cold-start injector in there for the city-people who's only care is to: TURN key|put in GEAR| GO Never mind waiting even 30 seconds for the engine to wam up. Too much in a hurry to GO! These same people go to car shows to check out old cars and they say, "I wish I had one of those!" Only if it had a/c, XM radio & a dvd screen! YEEEEESSHH! That's why I respect those guys with the old cruddy MGs & such, who are willing to drive around with no top, the seats are ripped and ther door panels fell off. Guys like us? Quote Link to comment Share on other sites More sharing options...
tec280zx Posted December 31, 2003 Share Posted December 31, 2003 with my csv disconnected my z wouldn't start at all in 40 degree weather. But i have higher compression, maybe that makes a difference? Quote Link to comment Share on other sites More sharing options...
kalium99 Posted January 2, 2004 Author Share Posted January 2, 2004 I'm in Brisbane,Australia. Summer is upto 40 degrees (celsius), and it would rarely see below 15 degrees (celsius) in winter. I am planning on having higher compression though, so I might keep it. Quote Link to comment Share on other sites More sharing options...
tec280zx Posted January 2, 2004 Share Posted January 2, 2004 yea keep it. Won't do anything but help... Quote Link to comment Share on other sites More sharing options...
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