Are you sure it isn't dropping from belt/ball carrier slippage?
Are you sure it isn't dropping from belt/ball carrier slippage?
Originally Posted by JPJP
I'm running 9lbs at 5500 rpm 3rd gear thats with the meth dual nozzle. I haven't had it tune yet. Hopefully I'll pick up another pound with the tune. I'm going next saturday I'll let you all know what happens.
Absolutely no belt dust and no slipping/grabbing characteristics I have had with belt slippage in the past.
Last edited by JPJP; 05-05-2011 at 08:22 PM.
Afterthougts:
No evidence of belt slippage.........but the balls slipping maybe. At 5500 RPM's the impeller shaft is just over 39K RPM's. Never thought of that possibly being the case.
Anyway, the '86 yellow lines at 4800 RPM's. I was intentionally over revving to see the maximum boost I could get.
If you want to know your boost nail it in third gear to your highest rpm, thats your boost.
I heard either 2nd or 3rd gear for checking boost, but not first since the load isn't high enough. Numbers have been the same thus far.
Do you have a by-pass valve? What is your timing set at? Do you have a power pipe. A power pipe will give you 1-2 lb of boost. If you want more boost go with a 7" crank pulley 8 rib setup. The 3.75 s/c pulley is the smallest you can go. If not all that use meth.
Timing is set at 13-14° BTDC base. Still running S.D. with the stock computer.
No by pass valve.
No power pipe.
Ghost88, are you running S.D. or Mass Air?
I converted to mass air. DO you have a boost retard, if not your timing should be set at 10 degrees. Get a by-pass valve for safety that air charge needs some where to go. You maybe want to go with 30s or 42s. When I had 30s my 255 pump wasn't pushing enough fuel so I added a t-rex pump. If you plan on doing any thing else to the motor go with 42s and a t-rex. If no plans 24s and a 255 pump will be fine.
Last edited by Ghost88; 05-06-2011 at 05:34 PM.
JPJP I belive you can use a BOV since your S/D.
Thanks for your help Ghost88. I am not getting spark knock so I will keep the ignition advanced it is worth 20HP according to Kenne Bell to have the initial advance at 14°.
See attached file.
Nice! Someone boosting with speed density
If the harness in my car wasn't pinned out for cbaza, it would have been fun to get it dialed in with speed density.
Have you ever considered a Moates quarterhorse and binary editor?
Mike
88 t-bird: 5.0ho, gt40y, crane 2031, fms 1.7, sn paxton 6#, aod wide ratio, tci stall, performer rpm upper, 70mm bbk, pro m 60, 42#s, 3.73 7.5" posi, jba shorties, borla, upr x.
Moates quarterhorse and binary editor......never heard of them. I will do some research.
I have heard good things about the Megasquirt systems however.
A good place to start is at eectuning.org
From what I understand Megasquirt is more like a stand alone you build or buy semi built and go from there.
Quarterhorse you just plug it in to your pcm and a laptop, buy binary editor, and your ready to start tuning on the fly with the engine running :evil: with real time data logging and good support on the eectuning.org forums.
Imho it should be the 1st mod anyone who owns a performance Mustang should buy. Heck after you finish tuning with the quarterhorse you could even burn your file to a j3 chip and sell the quarterhorse. moates.net is closed this week but I've heard Craig Moates is a standup guy who's happens to be a genius also.
Hope this helps,
Mike
88 t-bird: 5.0ho, gt40y, crane 2031, fms 1.7, sn paxton 6#, aod wide ratio, tci stall, performer rpm upper, 70mm bbk, pro m 60, 42#s, 3.73 7.5" posi, jba shorties, borla, upr x.
I checked it out Mike. It appears the '86 does not have the correct computer. '87 is the first year that will work.
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