Thread: XP or S1X

hummm well then...i just dont know. more reserch in store. witch cam makes the best torque on stock heads??

Originally Posted by blowfishRus6

hummm well then...i just dont know. more reserch in store. witch cam makes the best torque on stock heads??

Not sure. My guess would be the S1X. Raising the shift points, with the VS, XP, S1X on stock heads beyond 6200 is not required nor helpful IMO. Look at the dyno's and see what is happening to the power.

I should clarify what I mean by loss of lowend power. This only affects low rpm low throttle postion versus stock. Anything above ~2200 rpm is great. Comparing equivalent throttle movement. To make a quick traffic manuever now, I have to give it more throttle, which either causes the TC to unlock, or a downshift. When either or both of these things happen, you can tell the car is cammed. If you give the throttle enough % from any rpm or mph, you know the car is cammed.

btw, my car shifts right at 6K (recommended by the tuner) at WOT and chirps the tires when shifting into second.

Originally Posted by TDCRacing

indeed do you have the xp?

Yes I have the XP and 3.29 gears and I had an S1X with 2.93 gears. The S1X>XP IMO. I did have a great deal of fun with a sportbike and a new mustang today. from a 50 MPH roll, the sport bike would quickly gain momentum after a couple of seconds and start to pull on me. The poor Mustang on each run would fall farther back in the rearview mirror. The wife acted like she was mad, but was smiling while complaining.

Brian, when I drive to work if I'm driving at 60 the emgine is turning around 1700 rpm at about 5% TPS, when my car was stock 10% TPS increase would pick up speed very quickly to pass a car without any effort. Now, even with the 3.29 gearing that same 5% to 10% TPS increase at 60 MPH and 1700 RPM's will not pick up as quick. It takes more throttle to achieve the same pick up. Although once that shift or TCC unlocks due to the increase in TPS, the pick up becomes greater.

My problem is I pay attention to eveything. I rarely have my radio on because it messes with my ability to listen and feel for any changes in operation. OCD FTL

o and your car sounds good by the way..

Originally Posted by blowfishRus6

o and your car sounds good by the way..

Thanks its LOUD @wot I think I am getting old I want to quiet it down

it sounded pretty loud at idle so i could imagine!!

chirping tires in second would be bad and okay i kinda see what your saying now. its like its a bigger cam so it takes a little more to get going but once it gets going, its going and yea the S1X is seeming like the better option for max torque.

Originally Posted by Reptile

Um....since when does anyone drive around town under 2000 rpm. Unless my gauges are off, that's where I cruise at, and I have NO problems with power all through the RPM range.

I like my XP, and I'll probably continue to use it in my next engine(s)

Um, I do? I rarely go over 2k rpm while driving around town. VS cam FTW.

do yall make good torque tho?? it seems like the xp is more for topend..

okay. yea i think im just gonna have to find dyno sheets. thanks for the info tho guys

Originally Posted by Reptile

If you guys are watching the stock tach, you'd be surprised at how off it is. I'm just saying, in town your converter usually isn't locked up so you're going to be over 2000 rpm.

XP FTW, tuner FTW.

I don't really have a problem in town. Low rpm low tps is more of a hiway thing for me.

to the OP you aren't going to get a straight unbiased answer here. There are also very few people here that have run both cams. This may or may not be helpful but check this out http://www.clubgp.com/newforum/tm.as...anguage=single
On a daily driver I prefer quick versus fast and IMO the S1X even with stock gearing feel quicker that the XP with 3.29. As I was reading through posts comparing cams and people asking about one for their daily driver, it seems many don't get what the DD's are looking for. I see references to going WOT from 0 to 50% TPS. Going WOT from anywhere, if your tune is right, will likely acheive close to the same results. When we daily drive under normal operation we are not going WOT.

The other thing to consider especially on a DD, is the boost bleed off. Since the XP bleeds off so much boost, you should be able to run a larger pulley with the S1X to acheive the same boost...anyone see the the potential benefits of running a larger pulley?

Now we have the less important, but important none the less, exhaust sound. On my car the exhaust note is sooo much better with the XP.