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06-25-2008
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
06-25-2008
The S1X is a favorite of everyone i know, but no one I know has had both.
06-25-2008
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
exhaust clip in sig
06-25-2008
What are the specs on the LL cam? where did you order it from? and how much was it?Originally Posted by black.gtp
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
The S1X is actually smaller than the XP...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
06-25-2008
the xp cam has proven to be the most powerfull on stock heads. Checkout the link to some dyno results.
ClubGP Message Forum troubleshooting
06-25-2008
You can get the PRJ LL cam from Welcome to PRJ.Performance contact Paul for specs
Paul is working on changing that
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 13.1@109.5 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
Last edited by black.gtp; 06-25-2008 at 09:19 PM. Reason: 1/4 info
06-25-2008
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..
06-25-2008
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
06-26-2008
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.
06-26-2008
with stiffer valve springs and all could an engine with stand a 6500 redline??
06-26-2008
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....
06-26-2008
well i was just wondering if anything else would break due to higher reving...humm maybe i should look at some different cams. but i see you got the car together huh..
06-26-2008
The 3800 is pretty sound to rev high. The bottom end is, at least. The valve train is what needs to be able to keep up. Plus having enough potential to feed/exhaust the cylinders at 6k+ RPM.
06-26-2008
so i wouldent be throwing out any bearings or anything like that above 6k?? and all i would need is stiffer and bigger valve springs??
06-26-2008
at what rpm does the supercharger start to become inefficent?? wouldent it be smart to have a cam that works around that??
06-26-2008
This thread needs some proof
06-27-2008
Trannyman is right IMO. I can only tell you on a daily driver (no dyno or hard documention) the S1X even with 2.93 gearing felt more impressive than my current XP with 3.29 gears. Tuning is a big thing, and both of my setups were tuned by those that truely know tuning, so we can throw out that variable.This thread needs some proof
As far as how high to rev, look at the dynos and see where the peak HP is being made, just like Bio mentioned. IIRC the ones I've seen, have peaked before 6K. Going much above that is not going to help, unless when it shifts it's not dumping you high enough into the powerband. Even then I'm sure there is a balance between losing HP by revving too high and not dropping high enough into the RPM after the shift.
The PRJ LL cam looks real promising. Don't discount it out yet. Someone Paul just setup with this cam posted some results over on the big board...looked pretty good to me.
06-27-2008
Ewolfe on 3800pro dynoed his car with the PRJ LL cam @349WHP here is a link to the chart 1997 Riviera - 3800Pro.com Forum
Hopefully I can get my tuned in and dynoed soon
06-27-2008
im on it...there was a pdf file of a desktop dyno that compared a bunch of cams one was the xp and i belive the s1x was on there too...if i could find it...im still looking so sit tight
06-27-2008
im on it...there was a pdf file of a desktop dyno that compared a bunch of cams one was the xp and i belive the s1x was on there too...if i could find it...im still looking so sit tight
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