Yes and??? Lol
CK5
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84 K20 "Ethel" Not an Sbc/NV4500/241C
- Thread starter sreidmx
- Start date
Semi restoration of a 1984 K20 pickup.
5.3 LS, nv4500, np241c.
This is well over my head I'm afraid to admit, I haven't even figured out how to tune my fitech yet....
Me too.. but I figure I hasnt blowed it up yet.. and the mfr was brave enough to swing the cam back and forth way more than I am..
Mfr short for emeffer? lol supposedly it's easy to tune but it has to run first. It'll get there just as sure you'll get yours. Perseverance pays so they say
Manufacturers. And yes being dumb and stubborn pay off supposedly lol I guess it hasn’t disuaded me yet lmao
That damn low end EGR retard. I wonder if that's still enabled on my 6.2. I have some weird behavior at low end OD hill pulls.
With the steep ramp you set at about 2500rpm, do you notice a sudden jump in engine power? Like VTEC just kicked in yo!
Nice work on the tune though, nice flat lines.
I bet ya that is what you are feeling, on the hp tuners forum that’s actually the engine they referred to with these cam timing numbers.
Funny thing with that jump it actually has a noticeable transition but there isn’t a drop off in torque. I am gonna smooth it out some and see how it feels.. I am just totally shocked aside spark this has to be the single largest butt dyno improvement..
And thanks this is my first go round with any gm efi.. I am a carb guy lol
Ok checked mileage this morning, 14.5mpg, includes tuning, hooning, and commuting! All in open loop 
so I would imagine if I was conservatives it would get better.
I also sloped the cam table and it seems happier.
so I would imagine if I was conservatives it would get better. I also sloped the cam table and it seems happier.
Alright double checked the fuel mileage for the round trip work commute, 6.66 gallons for 100 miles.. I’ll take it!
Also with the cam timing sloped it doesn’t actually get into that region crusing so I can now maintain 80 uphill in OD without pushing it past 1/2 throttle..
Also with the cam timing sloped it doesn’t actually get into that region crusing so I can now maintain 80 uphill in OD without pushing it past 1/2 throttle..
Stock arm located from local buddy and now installed, we’ll see if this fixes my bump steer issues
After rereading through your LS swap/NV4500 adventure, it’s clear you made the best decision for Ethel. Lots of great info, and appreciate your detailed documentation.
David
David
Thanks David!
I am really trying to keep the nonsense to a minimum mainly because I had so much trouble findin certain details when building it. If it helps someone on here then it was worth the time. It also helps me catch errors and is sort of a log of the changes. I hope to continue this when I get Lucy back home..
Some of this stuff makes sense to me, but a majority goes over like a 747. But I am enjoying trying to learn more. Keep it up dude!
Lord I love those round motors!
So far no huge probs, I have been tweaking the timing to get rid of some high load low rpm knock, and I also think the tail shaft bushing is shot because I have some decent vibes.. also got most of the parts to quiet her down some, I must be getting old but quieter would be nice right about now on a near hour long drive every morning and night. Lol
Went wheeling with the guys and checked out some mines, only prep I did was grease the front drive shaft.. lol
always grease the shaft
