Baro updates more than just at start up. It'll somehow do it while the engine is running and at WOT.
The man who says something is impossible, is usually interrupted by the man doing it.
we used to use 1 bar code with 2 bar sensor pretty much set default map at key on at 50kpa.it may not be defined in your xdf or may not exist. halve all the table kpa values and fudge the injector rate to double fueling so the ve table didnt max out LOL
Last edited by delcowizzid; 12-27-2014 at 02:21 PM.
I had worries that it wasn't as easy as that seemed. I read a thread not long ago where a fellows solution was to use a 1 bar map and just up the fuel in the 100 setting only, basicly I suppose any time the engine was in boost it got more fuel and the higher the rpms the more fuel based off a single column for tuning... seems simple but also seems crude and not very linear.
I have been researching, looks like a lot of people just keep right on using the 1 bar map sensor. I guess I will just have to see at what RPM this thing starts to build boost and use the PE parameters to subtract timing and add fuel. If it starts building boost at say 2500 RPM then just make sure I am entering PE early enough to use the PE AFR and PE timing tables to do what I need to do. I may revisit the 2 BAR map after I get it up and running. I will look around in the hack and through the .XDF file to see if I can find anything.
Trying to figure out why I would need to fudge the injector rate? I had thought about lowering mine to richen the whole thing up. No mater what I did to the VE tables I was still way lean. So i could see where lowering the injector value would richen everything up but don't understand why.
-1999 Hugger Orange SS, LS2 402 T56, 9 inch Ford 3.90 gears, Tuned with HP Tuners
-2002 Cavalier, Tuned with HP Tuners
-1994 Full Size Blazer ,383 TBI 4L60E, 4.10's, Tuned with Tunerpro RT (Where it all began)
I was trying to drive the truck with no boost. Just the 2 bar map installed thinking that by re-scaling my tables that it should still run to 100 KPA just like normal. But it ran horrible. I am going through the MAP and Baro update tables right now, comparing them to a GMC Syclone bin but I am not real sure what I am looking out or how these tables work.
-1999 Hugger Orange SS, LS2 402 T56, 9 inch Ford 3.90 gears, Tuned with HP Tuners
-2002 Cavalier, Tuned with HP Tuners
-1994 Full Size Blazer ,383 TBI 4L60E, 4.10's, Tuned with Tunerpro RT (Where it all began)
Have you ever considered a FMU? raises fuel pressure at a determined ratio based off boost to push more past the injectors. For example 1:6 one pound boost raises 6lb fuel.. Iirc thats what Paxton and other supercharger companys were doing with TBI and early mpfi applications.
Well drove the truck last night, boost comes in quick, around 2000 RPM. I had to set my PE enable TPS to about 25 % to get it to richen up, which it does. But, it starts to lean out as the RPM picks up, so I have to let off pretty quick. Only about 5 pounds of boost right now. I retarded my timing table about 7 degrees in high load area, not getting any spark knock. I am thinking about putting main spark table back where it was and pulling timing with the PE spark table.
Today I am going to try hooking my AFPR back up to vaccum/boost source and raising the fuel pressure back up to about 60 psi, about 43 psi right now. 5 psi boost should raise raise fuel pressure 5 psi. I may have to fudge the PE AFR table to get it to richen up as RPM climbs. Open to any ideas here.
But man! turbo is freaken awsome! until lit goes lean...lol
-1999 Hugger Orange SS, LS2 402 T56, 9 inch Ford 3.90 gears, Tuned with HP Tuners
-2002 Cavalier, Tuned with HP Tuners
-1994 Full Size Blazer ,383 TBI 4L60E, 4.10's, Tuned with Tunerpro RT (Where it all began)
Wait, you're running an MPFI setup without vacuum(/boost) referencing the FPR? If that's the case, connecting a vacuum source will help lean out idle and richen up high load/in boost areas.
The man who says something is impossible, is usually interrupted by the man doing it.
-1999 Hugger Orange SS, LS2 402 T56, 9 inch Ford 3.90 gears, Tuned with HP Tuners
-2002 Cavalier, Tuned with HP Tuners
-1994 Full Size Blazer ,383 TBI 4L60E, 4.10's, Tuned with Tunerpro RT (Where it all began)
start with a standard base fuel pressure 38psi or so idling withe the vacuam diss connected .running 60 psi base will just drop the flow rate of the pump so much right off the bat even before boost adds more pressure
I am impressed with how quickly you got that put together. Are you still running the 2-bar MAP?
I'm pretty sure the PE spark table won't accept negative values.
The fuel regulator that scottyd mentioned in post53 might be worth a look.
We did get it done really quick, worked on it over the holidays, had vacation days. You are right PE timing won't take negative numbers. Right now I have about 50 psi fuel pressure with the vacuum hooked up. I have the same style injectors and pump thats in my Camaro and it runs 62 pounds all the time. It has really only taken me a few days to get the major bugs worked out, the thing runs like a raped ape...lol. Still on 1 bar, 2 bar is going to take some effort.
Last edited by 96lt4c4; 01-05-2015 at 05:14 AM.
-1999 Hugger Orange SS, LS2 402 T56, 9 inch Ford 3.90 gears, Tuned with HP Tuners
-2002 Cavalier, Tuned with HP Tuners
-1994 Full Size Blazer ,383 TBI 4L60E, 4.10's, Tuned with Tunerpro RT (Where it all began)
Bookmarks