Semopar Forum

**Redtruck-VA** · 04-11-2011, 11:46 AM

Originally Posted by AF_Hemi

my guess is either im reallllly lucky and this PCM just accepted it, OR hemifever is just freaking amazing. Probably a combo of both

Well, I think having a good tuner certainly helped. But my theory and we know what those are worth it is your MAP sensor not the PCM is slightly different. If you want to test it, put another sensor in and see if there is a change. I pulled my MAP sensor out yesterday to see what it would take to install jets. I threaded the hole to 3/8-18 and drilled a cut off bolt with a 1/8 drill just to see if I could detect a change. No change, I'll keep going smaller untill she chokes.

Storytime: Since you have one of those new Tang's you might appreciate this story. Coming out of Walmart, there was a brand new GT/CS black convertable sitting next to Red. As I put my stuff up a couple my age (old) started getting in. The broad might have been a little older as she had some work done. They were in their church going outfits and she had this big hat. Anyway, I said, man that thing looks fast. The guy looks at me all sheepish and says, oh my wife is a real speed demon. I said have you had it at the track? He looked like I just accused him of fondling the neighbor's kid and said No I don't push it. Meantime the bride is struggling with her hat trying to get in and finally throws it in the back seat. Apparently the new ride is not fitting into their lifestyle well. What I'm thinking is someone is going to get one hell of a deal on a practically new GT/CS convertable real soon...

**Redtruck-VA** · 04-11-2011, 07:43 PM

After I got the PSC1 installed today I pulled out my home made jet and soldered it up and redrilled it to .100. This is down from .125. Still runs without issues.

Edit: We talking about my MAP restricter project....

Next project is wiiring up the window switch for the Pwr steering sensor.

**Redtruck-VA** · 04-11-2011, 11:46 PM

Scored a 6.1 ignition conversion kit for an excellent price so I'll be getting rid of all those fuggly wires.

OBTW, 03's rule!

**SmokedRam** · 04-11-2011, 11:49 PM

You sir are a modding guru!!!

**AF_Hemi** · 04-12-2011, 01:03 AM

haha this is awesome. what have you gained by making your MAP more restrictive?

**Redtruck-VA** · 04-12-2011, 07:49 AM

Originally Posted by 96MagnumRam

You sir are a modding guru!!!

Not really, I just returned from overseas and this is the stuff I've been planning for the last six months. Plus I just dumped close to a month's worth of work in three days on the forum. lol

Originally Posted by AF_Hemi

haha this is awesome. what have you gained by making your MAP more restrictive?

This project is in preparation for a cam install, so what I'm doing is trying to find the point that it becomes too restrictive to track the vacum and then back up a little hoping this will keep cam reversion from upsetting the idle. If this doesn't work then I'll go with a remotely mounted MAP and try to manipulate it using a vacum can. I'm just trying to take some of the sensitivity out of the MAP sensor. That and a raised idle I think will work well with a 03. Hell, might even help with the newer trucks. As they say, we will see...

**Redtruck-VA** · 04-12-2011, 07:49 PM

Got the Granattelli window switch installed today, I am thinking this may be a must for 03's witha cam. Basically it raises the idle to 800 rpm and then it slides slowly down to 675 rpm. Rev it up past 1000 rpm and it repeats. Does not affect drivibility. This is a very controlled event and should make a lumpy cam behave nicely. But as they say, we will see.

**AF_Hemi** · 04-12-2011, 09:03 PM

oooooh im VERY interested in this now...

My fuel trims are so out of whack right now because its either good fuel trims and wont run right, or runs smoothly but pig rich. Maybe this could help!

**Redtruck-VA** · 04-14-2011, 10:36 PM

Originally Posted by AF_Hemi

oooooh im VERY interested in this now...

My fuel trims are so out of whack right now because its either good fuel trims and wont run right, or runs smoothly but pig rich. Maybe this could help!

Aaron, there is absolutely no doubt in my mind that you would benefit from the high idle mod.

**Redtruck-VA** · 04-12-2011, 09:45 PM

Aaron, I honestly don't know how a cam with the overlap you have runs at stock idle. Back in the day we idled our SB's up to 1200 rpm. Lower the idle the more reversion the intake see's which degrades the MAP signal. This is why I'm focused on idle and cleaning up the MAP signal by isolating it. The MAP jet project probably won't work. But if we use a remote MAP we can manipulate it to a much greater degree,