TB size for 6.0
05-17-2014, 01:13 PM
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TB size for 6.0 What would be the correct size for the TB on a 6.0 LS with ported heads and a 228r/114 cam 10.5-1 comp? 6500 rpm operating range. Has long tube headers and LSXRT intake. I makes 411 to the wheels through an A4 with a 102 TB but I have been told its actually to large for my application. Then this leads to the next question, what brand TB's are easiest to tune or have the best drivability?
Last edited by Nova 404; 05-17-2014 at 01:38 PM.
05-18-2014, 05:29 AM
#3
The Fast branded 102 TB has the milled-in indentations on the bottom of the mouth for a reason. It does help part throttle drive ability and ease of tuning.
Remember this is fuel injection. We aren't atomizing fuel. The TB size won't have an effect unless it's too SMALL and creating vacuum at WOT.
I vote keep the 102 without a doubt.
Remember this is fuel injection. We aren't atomizing fuel. The TB size won't have an effect unless it's too SMALL and creating vacuum at WOT.
I vote keep the 102 without a doubt.
05-18-2014, 10:38 PM
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What's fighting me is it fires up perfectly cold, but will die if dropped into gear when the IAC is open(making lot of noise)as soon as it starts to quiet down it goes into gear fine. I also have a problem with idle hanging @ 1100 @ times. The TPS is showing the same rest (throttle closed) voltage and the IAC numbers start fluctuating. Also at 25 mph there is a gentile surge and the car feels much like its on cruise control, same issue exist holding steady throttle@ 1240 rpm repeated 90 rpm surge. Its gone above or below that rpm. If I hammer the throttle and let the throttle slam closed it stalls every time. Fully warm I am showing 20 Counts on the IAC sometimes and 30 at other times. I can drive the IAC open with the scan tool to 1300+ rpm so I am assuming the IAC is working properly. The tuner had a hell of a time getting it to restart on a warm restart as well, IAC goes open and showing a 90 count stalls. If you start it and pedal the throttle it will idle right down like it supposed to and come back to @ 30 counts and idling perfectly. This is in an old Nova with A PSI harness and does not have gear position input if that matters. When I drop it in gear warm the IAC goes to @ 100 and settles to 36 and idles normal, some times the idle hangs around 1000-1100 and is at 50-60 counts. Bump the throttle and it comes down to 36 and normal idle. I am new to LS(GM) EFI but am a 30 year tech at an import dealer so some of the GM language gets by me 
