Cam swap results EPS vs TEA
12-09-2011, 05:34 PM
#1
Staging Lane
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Cam swap results EPS vs TEA Finally had a chance to get back to the dyno and tune with the new EPS cam. The cam pulled was a 232/236 580/580 112 +2
Swapped in an EPS 234/242 .602/.605 112 +4 recommended by Patrick G and Brian Tooley.
Not much gain up top but a nice bump in the low-mid range which was my primary motive in changing cams.
Only change was the cam and tuning. Old cam was tuned also BTW. New cam required more fuel everywhere.
Supporting mods were ported LS6 heads fast 90 with 90 mm LS2 TB and LGM pro headers.
Swapped in an EPS 234/242 .602/.605 112 +4 recommended by Patrick G and Brian Tooley.
Not much gain up top but a nice bump in the low-mid range which was my primary motive in changing cams.
Only change was the cam and tuning. Old cam was tuned also BTW. New cam required more fuel everywhere.
Supporting mods were ported LS6 heads fast 90 with 90 mm LS2 TB and LGM pro headers.
12-09-2011, 05:40 PM
#2
Interesting. I had a similar experience. I went with an EPS that was a few degrees bigger and my gains were down low too.
It is interesting to note however that the EPS cam has 2 degrees more advance which could easily account for your increase in itself.
It is interesting to note however that the EPS cam has 2 degrees more advance which could easily account for your increase in itself.
Last edited by speedtigger; 12-10-2011 at 07:26 AM.
12-09-2011, 09:11 PM
#3
I was wondering why the bigger gain in the lower rpms but pointing out the 2 degree more advance accounts for that. It would appear the bigger cam also has more overlap. How is that effecting your idle?
12-09-2011, 09:43 PM
#4
Staging Lane
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The intake valve closes only 1 deg earlier. And overlap increased from 10 deg to 14 deg. Idle is great after some tweeking to the tune.
12-11-2011, 12:31 PM
#5
What is interesting to me is looking at 125mph and higher. The TQ looks to be exactly the same yet there is 5 more HP there and it holds 3hp more till the end of the pull. How can that be when the TQ is exactly the same cam to cam (HP = TQ*RPM/5252)? TQ should show some gain to show some HP gain.
Would also be nice to dyno the graph in RPM instead of MPH.
Would also be nice to dyno the graph in RPM instead of MPH.
12-11-2011, 07:14 PM
#7
wow. more duration, more overlap, more valve lift, more aggressive lobes...and hardly a gain. that wouldn't be worth the effort for a cam swap; to me anyhow.
nice post, sheds some light on cams and what they do. i will say that i haven't seen stellar numbers from the eps cam you swapped in. seems like a fairly large cam, similar to the tried and true g5z3, but does not perform like one. sad to say as the x3 is like 10 years old haha.
nice post, sheds some light on cams and what they do. i will say that i haven't seen stellar numbers from the eps cam you swapped in. seems like a fairly large cam, similar to the tried and true g5z3, but does not perform like one. sad to say as the x3 is like 10 years old haha.
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01-06-2012, 06:30 PM
#12
On The Tree
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Advanced it with an adjustable timing chain set? The greater lift contributes more than anything in my opinion, curious what the KPA difference was between the two runs. Thanks for sharing, Chris
01-06-2012, 08:38 PM
#13
wow. more duration, more overlap, more valve lift, more aggressive lobes...and hardly a gain. that wouldn't be worth the effort for a cam swap; to me anyhow.
nice post, sheds some light on cams and what they do. i will say that i haven't seen stellar numbers from the eps cam you swapped in. seems like a fairly large cam, similar to the tried and true g5z3, but does not perform like one. sad to say as the x3 is like 10 years old haha.
nice post, sheds some light on cams and what they do. i will say that i haven't seen stellar numbers from the eps cam you swapped in. seems like a fairly large cam, similar to the tried and true g5z3, but does not perform like one. sad to say as the x3 is like 10 years old haha.
