Originally Posted by
arro222
No tune. But the truck is around the 12 mark AFR wise when decked. 14.2 AFR around town. Except for a 2-3 shift bog which is being caused by an early (4800-5200) shift, the truck seems strong considering no tune.
I am an absolute knuckle head electronics wise and have bought an SCT from Ryan 2 years ago. Never did much with it. Don't even have an IBM type lap top or pad to coordinate this email tune stuff.
Can't see how this would make the truck any faster with the AFR seemingly correct.
Accordingly, considering your times, I should be able to break the 14 second barrier. Either I've been away from it too long and don't know differences by seat of the pants, but it just doesn't seem like a 13 second truck.
I also have the 2800 stall, original rears, heads purportedly flowing at 266 cfm (wouldn't trust IMM Engines with this alleged figure of theirs as far as I can throw an engine block) a cam in the .218-.226 range @ .50 w 112 lsa.
Compression is key with these things and mine is only at 9.5 static.
BTW, you are approximately 6-7 tenths off the truck I described above. He was running mid 12's all day long na. His truck weighed in at 3800lbs. A cam almost identical to mine. All I know is he had extensive head work done and mill cut to .40.
Other than that, your truck and his are almost identical na. I am intrigued as to what may have been the difference.
Unless there is some secret thingy to the heads on the 360, I'm not thinking his heads were making up 6-7 tenths. Oh, he was running a 727. There's 3-5 tenths right there. Put one of them in and you're probably doing 12's.