savageskaterkid Posted October 12, 2007 Share Posted October 12, 2007 I have the stock N/a electronics on my L28. It is now boosted, I plan to fire it up this weekend. I will have the megasquirt setup within the next few weeks, I just need to get it running under boost for a test run before I do the megasquirt install. I am also considering doing a dyno run before and after megasquirt. I have a mallory adjustable FPR, and would like to know what kind of pressure I should set it at, and a good mark to set the timing. My setup is in my sig. Any ideas? Quote Link to comment Share on other sites More sharing options...
big-phil Posted October 13, 2007 Share Posted October 13, 2007 do you still have the N/A injectors? If so I don't know if you should boost it at all? Quote Link to comment Share on other sites More sharing options...
z-ya Posted October 13, 2007 Share Posted October 13, 2007 The stock dle fuel pressure should be in the 35-40psi range. Quote Link to comment Share on other sites More sharing options...
boardkid280z Posted October 13, 2007 Share Posted October 13, 2007 Fuel pressure should be around 36psi, with the vacuum line disconnected. It will go down to 28-30psi when you connect the vacuum line. Mind, that's for a stock car, with a stock vacuum actuated FPR which will have a base fuel pressure that goes down under vacuum and up under boost. Hopefully your Mallory Unit will act similarly, because with boost, you kinda wanna make sure your FP goes up with boost. Quote Link to comment Share on other sites More sharing options...
stprasinz Posted October 13, 2007 Share Posted October 13, 2007 your best bet on fuel would use one of those bandaid fix fpr that rise the fp like 8 psi per 1 psi of boost and cross your fingers... or raise the fp to like 70 psi with the vac line disconnected... and as for the timing retard it like 8 degrees from stock depending on your total advance..... just a start.. also on the fuel note if you do just up the pressure significantly you may want to tighten the spring in your afm a bit to compensate but if I were you I'd wait for the megasquirt install your only asking for melted pistons or holes in pistons blown headgaskets etc.... although there are people who are out there that will say Ive ran the na injectors by doing nothing more than raising fuel pressure alone........ good luck at anyrate Quote Link to comment Share on other sites More sharing options...
savageskaterkid Posted October 13, 2007 Author Share Posted October 13, 2007 this is for a before and after dyno test mule. If it blows, well, it sucks, but it gives me a chance to do a swap. Besides that, I'm not too sure if I'll be keeping megasquirt or not. If I get rid of it, I'm going tripples. Quote Link to comment Share on other sites More sharing options...
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