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XP or S1X

1998gpgt

1998gpgt

New member
There was a recent incident in which I most likely blew my #3 piston ClubGP Message Forum troubleshooting :( . So i have decided that the new block will either get an XP or an S1X. I am looking for feedback and dyno #'s/ track times from those of you with first hand experience. Thanks in Advance :)
 


PRJ LL cam in my opinion is better than both its a smaller cam valvetrain friendly and will put out good numbers on stock heads a local guy has a riv same mods as me and hit 349 whp with that cam and PRJ said there was still more to be had
:th_thumbsup-wink: exhaust clip in sig
 
if i were to choose between those two, i would pick an xp. its a proven cam, but then again the s1x is too. but if i were to choose a cam out of everything, i wouldnt have stock heads..
 
not sure if the s1x can be used with stock heads but I have the xp and by just swapping the cam from a stock to an xp i can notice a big difference between the 2. Even with no tuning done yet i can tell a majior difference
 
black.gtp said:
PRJ LL cam in my opinion is better than both its a smaller cam valvetrain friendly and will put out good numbers on stock heads a local guy has a riv same mods as me and hit 349 whp with that cam and PRJ said there was still more to be had
:th_thumbsup-wink: exhaust clip in sig
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What are the specs on the LL cam? where did you order it from? and how much was it?

not sure if the s1x can be used with stock heads but I have the xp and by just swapping the cam from a stock to an xp i can notice a big difference between the 2. Even with no tuning done yet i can tell a majior difference
Click to expand...

The S1X is actually smaller than the XP...
 


You can get the PRJ LL cam from Welcome to PRJ.Performance contact Paul for specs

TDCRacing said:
the xp cam has proven to be the most powerfull on stock heads. Checkout the link to some dyno results.
Click to expand...

Paul is working on changing that :D

I need to do a few more things to my car before he can really tune it I have tie rods bad and need tires and alignment then the tuning with start then we will hit the Dyno for some numbers

With a 3.0 pulley at the track full weight 3/4 tank of gas I was running [email protected] all night with 2.1+ 60' The tune is close to stock tune maybe 14 degrees of timing I know its not the the greatest but I need slicks to get it to hook
 
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black.gtp said:
You can get the PRJ LL cam from Welcome to PRJ.Performance contact Paul for specs



Paul is working on changing that :D

I need to do a few more things to my car before he can really tune it I have tie rods bad and need tires and alignment then the tuning with start then we will hit the Dyno for some numbers

With a 3.0 pulley at the track full weight 3/4 tank of gas I was running [email protected] all night with 2.1+ 60' The tune is close to stock tune maybe 14 degrees of timing I know its not the the greatest but I need slicks to get it to hook
Click to expand...


so is that with the mods in your sig?
 
yes it was like I stated its not tuned in yet and full weight and bald street tires My MPH ranged from 109.52 - 109.94 through 7 passes e.t. from 13.5 - 13.1 more 13.1 - 13.2 and 60' 2.1+ 13.5 was first pass after driving 30min to track
 
cool im anxious to see what mine will do from 13.5 with the addition of a cam and 3.2 to a 2.8 and a tep tranny along with a bad ass tune.
 


TDCRacing said:
cool im anxious to see what mine will do from 13.5 with the addition of a cam and 3.2 to a 2.8 and a tep tranny along with a bad ass tune.
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Good luck:th_thumb-up: looking at 1/4 mile times here and clubgp my MPH is close to mid 12's if I can get traction:o
 
Traction? what exactly is that? :D and yea i thought those were awfull high traps
 
I've had both. The S1X idled rougher and better low to mid range power than the XP IMO. If I had to do it over now that I've had both, the S1X would be my choice.
 


IndeedSS said:
I've had both. The S1X idled rougher and better low to mid range power than the XP IMO. If I had to do it over now that I've had both, the S1X would be my choice.
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With that being said i guess all you have to do is figure out what you want more now. Generally hp is made in the upper rpm range of the motor. so is this mainly for dragracing or is it mainly a street car? I guess that may help you decide now that we finially have someone that has experience with both.
 
thats the thing that sucks about the big cams that these vendors make. without raised shift points you really dont get as much as you can out of any of them. i mean, look at the xpz. it makes hella power way into the 6k range. no one shifts that high except for the people who run big valve springs or people that want to have no valvetrain left after a good run.

i wish someone made a cam that PEAKED power at like 5200. i want some low end man, i dont take my car to the track..ever.
 
Well im at 6400 right now with 105 springs and the xp cam. You could probably spin the motor up to that with stock springs but i can only imagine how much valve float you would have....is it hurting the motor in some way? probably so...shortining the life of the motor? probably so....
 
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