Linc's 200":3sqro045 said:
Bort62":3sqro045 said:
running WAY too rich can show up as lean on an O2 sensor. At the moment, I forget the exact reason why but if I think of it I will be sure to post.
Because the burn quality in the chamber is so bad and cold, even a fair bit of air won't get burned off. Bad flame quality.
Thanks for that Linc. Yeah I have just been reading my plugs for now, and the gauge is there now for looks, only.
Got back from the sand drags/rock crawl event, and the holley had no problems, what so ever. Only issue is the transition b/tw idle and part throttle hesitating/missing. What I did since I was there most of the time on the rock crawl was up the idle to @ 1200rpm and fine tune the carb mixture screws, worked good. The holley with the spring loaded needle/seat work flawlessly on the rocks, no spits or sputters, and the lower fuel pressure (@ 3.5 - 4psi) helped out, too. Got the Quickfuel metering block and set it up back to stock specs of the 7448 holley (350 cfm 2-barrel). At WOT with 0.053" pvcr's I ran a 12.7:1 AFR (what meter indicated), this might be part of the denotation problems. I will open the pvcr's up to 0.060" and see how that does. I changed my PV to a 6.5 because I was getting fuel to soon at light load/cruise with the 8.5 - 10.5 PV's. The IFR's are a stock 0.028" and the IAB's are also stock at 0.070".
Once I got to the sand drags...well, I might as well tell you how I did first:
8 races, at double elimination:
6 wins
1 tie
1 loss (due to a bad start)
All races were against V8 engines in 4x4 vehicles
1)289's, (3)302's, (3)351's and (1) chevy 350 on propane (lost to him on a bad start, yet he never pulled away and I was right next to him the whole run).
Only concern, pump gas sucks! Ran 18* total timing at 10psi boost (7psi base fuel pressure) and still denotation was there (had to let up on two races and the end) w/ 93 octane. And, fuel pressure was good when boost came on. Did not run any lower total timing, no time to change b/tw races.
I do need a new gas tank, though, come to find out it is full of dirt and rust. Had some issues during the practice races w/ no fuel up top due to a clogged filter, the one before the pump. It must have been the bouncing around the rocks that loosened it up and clogged the filter. I unclogged the filter and ran the races, hoping it would not starve me out (did not have an extra filter on me).
It was a fun weekend, that turbo inline six really proved itself off and on the (sand) track.
Whats the deal on E85 (I will read up/search some more on it)? Will (does10s), if you are reading, could you chime in if you don't mind.
Don't have any pics, myself, of the sand drags, did not bring a camera, but will see if anybody else does.
Kirk
