Hence the reason for dirtier oil faster. Exhaust valve closing sooner to keep some heat/soot in the cylinder for the next burn.Originally Posted by DoghouseDiesel
Hence the reason for dirtier oil faster. Exhaust valve closing sooner to keep some heat/soot in the cylinder for the next burn.
Joel
-6.7 powered 2006 Ram QC 4x4 Auto, EFI Live, Garrett, Thuren.
-08 Chevy Silverado 4x4 5.3, built 4l70E, COMP cam and Thorly headers.
Ok overlap I know very well. It's the drive pressure part that I'd overlooked. That makes sense.
By those cam specs, a 24v cam theoretically should really widen the powerband. Toward the bottom end mostly. Is that how it turns out in practice?
Don't get me wrong - if I go to the trouble of a cam swap, I'm going with a custom aftermarket grind. Maybe an off the shelf grind, but slightly less likely. Seems like a cam swap could work wonders for widening the powerband though. Sucks the allowable lift is so small on these trucks. But again I'm spoiled from my cars where you can run a 232/238, 108LSA, .650" lift cam and still daily drive it with ease. Considered to be middle of the road in size - not big - for a 5.7L. I still haven't seen any "top end" grinds for these trucks (yes I mean top end considering the need for torque, not a big stick like I'm talking above).
Does anybody make anything in the 200-210 duration range? They're gonna be able to with guys spinning to 5k! Sweet!
EFI Live, Maxxed Out auto trans, Edge TC, FASS, 35's, 4" lift, E.D. 62/68/12, 70 hp tips.
Hamilton cams has a 188/220 with .330 is what I'm getting ready to purchase. They also have a 200/220 and 207/220 all 3 108LSA and require valve reliefs be put into pistons.
Jake
Last edited by comnrailpwr; September 15th, 2011 at 12:12 AM.
Oh wow! I hadn't heard of them. Never looked cause I had no reason to. Those are a couple of sweet grinds. Definitely top end right there. Bigger than my goals, but exactly what's needed for these trucks if cranking them to 5k rpm. I can't wait to see one of those make a full run.
How high are you planning to spin your truck?
EFI Live, Maxxed Out auto trans, Edge TC, FASS, 35's, 4" lift, E.D. 62/68/12, 70 hp tips.
All leave the line around 4500Rpm but it'll only carry around 3500 down the track. There are a lot of ppl are spinning his cams to 5k+ in the 1/4 mile scene, not so much in the sled pull scene. Zach is awesome to del with and has some of the best cams out there for are trucks. He doesn't do regrinds either.
Jake
Does this look like enough timing for a single event tune?
I cant figure out how to tell how much is too much on a mostly stock truck
That is not enough timing at all. Not even close to enough. Search my name and you'll see my map I posted.Does this look like enough timing for a single event tune?
I cant figure out how to tell how much is too much on a mostly stock truck
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Thank you for the reply, I ran that and it spit and sputtered so I know thats not the one lol
Now I have two tunes one that starts with 8 and runs to 21
and the other starts at 13 and goes up to 21
I searched but did not find that graph you were talking about.
https://forum.efilive.com/search.php?searchid=1771348
This is what I have now, can someone please give me some feedback? Basically a stock engine with deletes
Also, should i be using the timing calculator for this? I wasnt sure since I am not using pilot or post events anymore.
Last edited by EverydayDiesel; September 2nd, 2016 at 12:03 PM.
I don't think the timing calculator is for single event tunes honestly. I think you starting with too much timing on that map and not ending with enough. Try making your max more around 24
I think this map is fairly current for me. I run stock pilot and timing to 1000 rpm so idling is quieter.
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