I higher numerically durtion number with a small numerically lsa will make the cam "seem" smaller as far as loss of low end and will also make a more noticeable "lope". The smaller lsa will bring the power in sooner but will cause more tuning issues but none that cant be tuned well. It will NOT work on a superships tune at ALL.

4.8redchev if you want a cam you are going to have to put a stall in it no way aorund it you already lose a bunch of grunt down low with the 4.8. It will be an absolute DOG down low on a stock stall. Do what you must but oyu will be unhappy with your results.

 

so flyer are you saying that if you take 2 cams exactly the same specs except for lsa, the lower lsa value of say 112 will bring the power on earlier than the cam on an lsa of say 115? cause i was told its the other way around...

 

That is what he is saying SportSide has numerous dyno charts that he could show you Im sure. Im not even going to begin looking for them. A lower numerically lsa will bring the powerband in sooner than one that has a higher number. Dont get me to lying on all the reasons and theories cause I just go cross eyed but all of those that are fluent in "cam talk" say that.

 

well this is my plan this summer, my engine builder is going to teach me how to port and polish so were gonna do my heads and intake then im going to have to get a cam to match the heads so then i figured id get a stall and we would put in at the same time.

 

If you're going to do head work, that will really wake that cam up. I'm still gonna stick with my 218/224 on a 112. You could also look at a TR220 on a 112.

As for the *converter* with a cam ... (A converter has a stall rating, but it is not called a 'stall'.) It's not completely necessary. A looser converter will most definantly completement the cam's power, it isn't necessary. I put a 216/220 114 in a completely stock ECRB 4.8 auto. It makes good power down low all the way to about 6300. He still tows things with the truck also.

Recap ... the bigger cam DOES make good power down low, probably more than the stock one, and it really shines up high. A converter isn't 'necessary'.

 

Yes "stall" is a widely miss-used term for a converter with a higher than factory stall speed. 01Thunder has 3500 stall speed converter in his truck with a 4.8/TR224 combo that works well. I had a converter that only stalled to 2500 to my truck in 5.3/222/224 112lsa cam in there and it NEEDED a 3200 atleast in it. To get the best E/T in the 1.4 you will need a higher speed stall converter in the 3K range IMO.

 

Shoot, our stock cams could use a better verter as it is, mine is a pannywasted down in the low range. I cant wait to install my gears and verter! Its gonna be such a releif to get rid of the bogging at 55mph!

Recap- 3.42s with stock converter suck!

 

They could use a looser converter from the start, but just because you change cams doesn't mean you HAVE to change the converter too.

 

Exactly. Here is a link to a thread I started on LSA effects.

 

My 4.8 5 speed had a noticable idle with a 216/224 .558 .558 114 lsa cam. I liked it. Not too much. It required tuning to get it to idle correctly of course. I had a good power band. It was a custom ground Lunati that I purchased from Farmerbeau. I ran 7.4" pushrods and 918 springs.