GM Engine & Exhaust Performance EFI | GEN I/GEN II/GEN III/GEN IV Engines |Small Block | Big Block |

STS users with FMIC....

Thread Tools
 
Search this Thread
 
Old Sep 4, 2004 | 11:02 AM
  #1  
F8L Z71's Avatar
Thread Starter
12 Second Truck Club
 
Joined: Feb 2002
Posts: 5,575
Likes: 0
From: Sacramento, CA
Default STS users with FMIC....

I was doing some testing with the G-Timer today (don't groan, the damn thing is very accurate when used right).

While testing I was watching my boost guage and it is very unstable now. Before the FMIC it would hit full boost and stay there. Now it varies by as much a 4psi and can spike even more. On the 3 runs I did today I would hit 13psi which is about where we have the wastegate set but at times durring the run it would crap up to 14psi then drop down to almost 11psi then hit a shift and spike to 15psi.

The fix for this as I know it is to run the vacume line from the wastegate to the front of the truck so you can get the vacume source AFTER the IC which will allow the wastegate to do it's job and keep boost steady. I am waiting on a call back form Dave to get instructions on exactly how to do this and if we should use steelbraided line or not. I'll report back when I have the info and have it all set up.

Ohh, and just as a teaser. It seems my questionable run at 12.45@107.7 1.72 60' the other night might be closer than I thought. Every once in awhile I get a fluke run on the G-Timer which is 4 10ths and about 4mph too fast but the 60' is dead on. I always throw that one out and keep the rest. Well today I went 12.25 @ 108.2 1.68 60', 11.90@112 1.62 60' , 12.28@108 1.67 60'. The temps were 61deg outside and the road is about as level as you can get being a highway and all. I am not doubting the 60' at least because I stalled it up and launched with 7psi and the truck shook back and forth while rocketing forward. It was the crazyiest feeling. Almost like playing tug-O-war with a dog the way he shakes his head back and forth, that's what the truck felt like!

The track was closed last night so I have to wait till Wed. or Sat. to get real #s but I am feeling pretty damn good right now. Mid 12s may actually be doable if I can keep boost constant.
Reply
Old Sep 4, 2004 | 11:11 AM
  #2  
On The Tree
iTrader: (1)
 
Joined: Jul 2004
Posts: 179
Likes: 0
From: Houston, Texas
Default

Awesome gtech times- your STS setup is siiiick . I'm looking forward to seeing your track times. keep it up
Reply
Old Sep 4, 2004 | 03:38 PM
  #3  
TieRod's Avatar
TECH Enthusiast
 
Joined: Jan 2004
Posts: 712
Likes: 0
From: KC MO
Default

Drop your t-bars down to keep it from doing its little dance. Make shore the tierods set level that should keep it from doing that. I've had allot of problems with this got to the point that I had so much power on launch that the front end would bounce off the ground and brake and bend the tierod's. Some of the D-MAX guys have tierod sleeves and beefed up center link the guy that make them said you can launch with the t-bars all the way up with no problems. I'm sure the sleeves will work but the center link might be different. Man I love 4x4 launches
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
simman22
GM Parts Classifieds
5
Jan 21, 2017 10:27 PM
Superman09
Sponsor's Announcements, Sales, and Specials
9
Sep 25, 2015 05:55 AM
06 4.8
GM Parts Classifieds
5
Sep 11, 2015 10:36 AM
the owl
Trucks and SUV Classifieds
0
Sep 4, 2015 04:09 PM




All times are GMT -5. The time now is 05:32 PM.