dpuma8 Posted December 21, 2016 Share Posted December 21, 2016 I have a shop built L28ET that I am ready to drop into my Z car but do not have my tune completely figured out yet. So to save my new rebuilt engine, I bought a P90 head and ARP head studs to put on my current N42 block. Now that the swap has been made, there is a lot of exhaust smoke coming out of the tail pipe even though the car is warmed at 180 degrees and holding. I did a compression test and cyl 1 was 122, cyl 2-5 were around 130, and cyl 6 was at 138. The Vacuum idles at 19 -21 inches. So assuming that I am leaking coolant into the engine and that is burning through the tailpipe, is it still safe enough to hash out a decent Megasquirt tune through this leaky engine for my new engine? The car feels fine driving although I haven't driven longer than 10 minutes anywhere. Let me know what you guys think! Dom Quote Link to comment Share on other sites More sharing options...
ZHoob2004 Posted December 23, 2016 Share Posted December 23, 2016 Imho any tune you can come up with for this combo will be no better than an estimated basemap for your new build. If you want to mess around with tuning and see what it likes go ahead, but I wouldn't expect to take any tune you come up with straight to your new motor. Quote Link to comment Share on other sites More sharing options...
madkaw Posted December 23, 2016 Share Posted December 23, 2016 Eventually the coolant burning will kill your wideband too Quote Link to comment Share on other sites More sharing options...
Crespo79 Posted December 29, 2016 Share Posted December 29, 2016 What is your setup? If it's similar to mine and on MS, I could send you some files I have. Quote Link to comment Share on other sites More sharing options...
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