Ported oil pump and ls2 timing chain?s
08-01-2005, 06:24 PM
#12
01slow, it looks fine to me for your plan (who am I though), it'll be lopey or cammy..which seems to be a characteristic you want. nothing wrong with lope...mine has good lope to it and it's a 6.0 with the same duration as yours. Good duration and you have a high stall to take it places. Do you have a plan of attack for what rpm range of power you want? I guess with a 150shot you'll be looking for the 6500 area eh? Whats Richard's opinion of the next step up in duration say maybe 226intake and 230exhaust? I am just curious, especially with your intentions of high revs. That'll definitely make for some lope though. (not as much as flyer's though)
08-01-2005, 06:30 PM
#13
Originally Posted by 1slow01Z71
So how does the cam in my sig sound to you for my heavy truck and the idle characteristics that I want.
however, sometimes what people think they want, and what they can live with are two different things.
here he here he
08-01-2005, 07:03 PM
#15
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The lower the Lobe sep. # the more overlap you will have, thus a rougher idle. The more overlap, the more peak hp you will make. The wider the lobe sep. the more broad the tq band and the better your motor will respond on N2O. And with the massive lbs. you are hauling around, the broader power band would be more beneficial, yet with the 3400 stall, low end tq won't be as big an issue. Look at some cams for older model motors, since there are so many, and notice the trends for what they recommend for nitrous and weight.
08-02-2005, 08:33 AM
#17
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I personally wouldn't go with more duration than the 224/228 you are looking at. The LSx motors head flow is so much better than the older small blocks. You don't have to have as much duration to get equal power at the higher rpms. With more duration the air flow efficiency goes up at higher rpms and drops at lower rpms, thus causing a rougher idle. The choppy idle is caused from the intake charge of air pulsing in the intake runners due to pressure bleeding back through the intake valve due to more overlap with the valve closing later on the the compression stroke.
08-02-2005, 10:27 AM
#18
Originally Posted by 1slow01Z71
SO whats the benefit of having an LS2 timing chain I will be dropping the 6L in my truck in the near future and I keep hearing about people putting the ls2 chain on. Obivously a ported oil pump is going to push more oil but is it really needed and worth the money. I will be pushing close to 500hp at the crank hopefully with a 150-200 shot on top of that.