While checking the sensor torque, I may try that.I ended up mounting the knock sensor on a short section of iron pipe. Before that just putting the trans in manual 2nd caused a constant stream of knock (false). Let alone random knock all over the place.
Hmm, ok, I suppose I could leave it where it is then, since by max boost I am 10.8-11 on 93 looking at the log.> Also, at 20 psi on 93, is 12.8 good?
No, want it richer then that. At 20 psi I run about 11.2 AFR. This too is on 93 (Sunoco). By 24 psi it is at 10.9 - 11.0 AFR. This is tapered in from 12.8 at 100 KPa (0 psi).
Not sure what is going on but I know I had issues when the secondary pump kicked in. The fuel pressure jumped quite a bit due to an insufficient return line. Made for all kinds of issues regarding the fueling. Here is the latest table:
View attachment 311257
The boost runs up to 24 - 25 psi max (270 KPa), and 5000 RPM max. No alky at this time.
Also, at 20 psi on 93, is 12.8 good?
My sbc with the ebl ran the best quarter with a 12.8-13.1 AFR at wot. It had vortec heads, and also liked more timing than recommended. Give the engine what it wants right?Haven't been on here in awhile. Did RBob actually share some of his personal tuning?
Yeah that's too lean for boost, most run richer than that even w/out boost at wot...
I won't be doing to much more tuning this year, the tranny isn't shifting too good at WOT, and the stock turbo is junk, it has 3/16" axial play.
So, I'm looking for an upgrade.
Rob, any tips on where to get a kit? I have 2 stickers that need bearings.That's honestly an easy fix for the turbo, and I'd hate to see you waste money on another one. Axial play is just a thrust bearing replacement. Just upgrade to a 360 degree bearing if it doesn't have one already, pop it in and call it a day. As for the transmission, when was the last time you reset the detent cable setting...?
Rob, thanks for the info. I'll look around on eBay and see what I can find.The Garrett kits are the most common, just try to source one on ebay from a seller that has good feedback. The kits range anywhere from thirty to seventy dollars, and essentially come with everything. The shaft size is the key, as my latest turbo employs the larger shaft, so pay attention to the specifications before ordering. When I rebuilt mine, I had debris from the piston get into the oil (piston ring pinched the piston at high boost, piston clocked, and number one cylinder was wedged, rod bent and piston destroyed) scratch up the shaft and destroying the journal bearings. Too much boost on a stock bottom end SBC, had the rings been filed it never would have happened. Anyways I removed the turbo shaft, smoothed it down, bought a fifty dollar Garrett rebuild kit, replaced all three bearings and seals, and the turbo has been flawless ever since. Usually come in just the two sizes (small shaft/large shaft), but measure anyway before ordering.