My ugly cover. I figured I would give it a coat of hot rod black with a big "SS" in the middle.
CURRENT 6.0/4l80E swap parts = $$$$
- Thread starter FastCraig
- Start date
- Status
I'm using a Megasquirt and the only issue I have is at light throttle tip in. If on the highway and I ease into the throttle, then I have no issue. If I stab it at highway speeds, then no issue. The issue comes with an increase TPS of 2-5% in a 1/2 - 1 second. It might go a little lean or might get a little too rich. The same goes when taking off from a stop. The MS will allow for accel enrichments based on both TPS and MAP changes or a blend of both - I've spent more time tuning this to an acceptable level than anything else. I've had the ecm set from 0 to 100% EGO correction with the same result. I'm happy with it, but it's not as smooth as a smaller throttle body will allow.
Keep in mind that this isn't just a 4.8 or 5.3 thing, I have 420ci's and it's an issue. The local dyno tuner confirmed the issue - he is a both a friend and sharp tuner, and his response is 'live with it or swap TBs'.
As I mentioned previously, I'd put on a 92mm if I were to do it again. My boosted build is different than a NA build in some regards, but here's the importance of a 102mm vs. 92mm - my motor doesn't care if the throttle is at 70% or 100% - it makes the same power once the boost is all in - and TPS % has no bearing on boost building over 50% TPS. So I don't believe the smaller TB would have any effect, positive or negative, on power production, but it would be more tuneable for daily driving.
Got a boatload of parts again. It's getting hard to keep track of all of it. More parts still coming.
Hopefully that throttle cable works man, after doing some measuring, I ended up getting one off ebay that fit the bill and I only had to trim it down a smidge. I'm running a flat flexplate between the 5.3 and 80E if I recall, I'll try to find the PN.
4L80Es came stock behind 6.0s. Why would there be any flexplate variations?
The throttle cable is supposed to be 36inches. It looks short.
My cable is the same length so you should be fine there. Here is a pic of the flexplate. It's the Summit SFI unit and dished.
I am still going with the Holley Sniper, but, based on the advice and experience from members here and discussions with my tuner I am going to go with the 92mm unit. When I take the car for the street tune he indicated it would take a few hours to dial it in. I really do make an effort to do function over looks. The truck intake is just so darn ugly. That is one component where originally I thought I could get past the ugliness because I know it was very effective. Turns out I can't overlook the ugliness and willingly replace it with the shiny new Sniper. I appreciate every ones input. Another positive is I already have a new 92mm TB.
- Status
Similar threads
