Rotrex Supercharger thread
09-27-2012, 06:54 PM
#121
Rennlist Member
You're right, my bad. Should have thought twice, but that's rare for me, so thanks for pointing it out. And furthermore, just took care of it (forgot I could do that.)
Last edited by M. Requin; 09-27-2012 at 06:56 PM. Reason: content
09-27-2012, 09:20 PM
#124
Rennlist Member
Join Date: Oct 2009
Location: Michigan... Grand Rapids
Posts: 758
Likes: 0
Received 2 Likes
on
1 Post
Too bad we cant just delete the crap in it. There are a few good points of interest, but it's not a bad idea... lol.
We could always repost the stuff like John Speaks MAF info. Hmmm... maybe when I get back from the dyno I should start with that.
We could always repost the stuff like John Speaks MAF info. Hmmm... maybe when I get back from the dyno I should start with that.
09-27-2012, 09:33 PM
#125
Rennlist
Basic Site Sponsor
Basic Site Sponsor
.....Again.
Why don't we just let Victor do some testing and then start over?
It's a really nice looking kit, apparently easy to install. Has some nice optional features. Seems like everyone that has it likes it, likes the power increase.
The only thing that seems to be missing is "accurate" (and that can certainly vary, from place to place and day to day) true horspower data.
That's all I ever was questioning.
Why don't we just let Victor do some testing and then start over?
It's a really nice looking kit, apparently easy to install. Has some nice optional features. Seems like everyone that has it likes it, likes the power increase.
The only thing that seems to be missing is "accurate" (and that can certainly vary, from place to place and day to day) true horspower data.
That's all I ever was questioning.
__________________
greg brown
714 879 9072
GregBBRD@aol.com
Semi-retired, as of Feb 1, 2023.
The days of free technical advice are over.
Free consultations will no longer be available.
Will still be in the shop, isolated and exclusively working on project cars, developmental work and products, engines and transmissions.
Have fun with your 928's people!
greg brown
714 879 9072
GregBBRD@aol.com
Semi-retired, as of Feb 1, 2023.
The days of free technical advice are over.
Free consultations will no longer be available.
Will still be in the shop, isolated and exclusively working on project cars, developmental work and products, engines and transmissions.
Have fun with your 928's people!
09-27-2012, 09:40 PM
#126
When I made this this post earlier I had it in my head crank HP power but posted RWHP. Sorry guys. I just made the post to quickly earlier. The factory 316hp is at the crank right ?
09-27-2012, 10:04 PM
#127
Rennlist Member
Join Date: Oct 2009
Location: Michigan... Grand Rapids
Posts: 758
Likes: 0
Received 2 Likes
on
1 Post
I have a dyno appointment here http://www.zzperformance.com/
I orderd a new 80mm pulley Tuesday, and had it shipped 2nd day air. Of course it didn't go out till Wednesday but oh well. I have decided to change the pulley on my supercharger back to an 80mm instead of opening up a new Rotrex box. Yeah those things aint cheap ya know!! Anyway, will retest my car with the 75mm pulley, then do a quick change over to the 80mm, and do another run with the base PEM data installed. Then I will have a camparison to the other dyno and see if it's off & how far. Also I should then have a good new stage 1 kit 5pd dyno. This will also allow me to come back a few days later and do a before and after dyno with the 89 auto. If I can find the damn keys that is
I'm still contemplating weather I want to do a test on the GTS or not... Little timid on that one...
I orderd a new 80mm pulley Tuesday, and had it shipped 2nd day air. Of course it didn't go out till Wednesday but oh well. I have decided to change the pulley on my supercharger back to an 80mm instead of opening up a new Rotrex box. Yeah those things aint cheap ya know!! Anyway, will retest my car with the 75mm pulley, then do a quick change over to the 80mm, and do another run with the base PEM data installed. Then I will have a camparison to the other dyno and see if it's off & how far. Also I should then have a good new stage 1 kit 5pd dyno. This will also allow me to come back a few days later and do a before and after dyno with the 89 auto. If I can find the damn keys that is
I'm still contemplating weather I want to do a test on the GTS or not... Little timid on that one...
09-27-2012, 10:26 PM
#128
Yes.
I wasn't trying to pick at ya or anything. It's just the only cars that I can recall that are putting around 325rwhp down NA are GT's with full exhaust (or at least X-back) with a LOT of Sharktuning. I believe there are some GTS' also.
I don't think that 300rwhp to start with is out of the question at all, but again, we're all just guessing at this point.
I wasn't trying to pick at ya or anything. It's just the only cars that I can recall that are putting around 325rwhp down NA are GT's with full exhaust (or at least X-back) with a LOT of Sharktuning. I believe there are some GTS' also.
I don't think that 300rwhp to start with is out of the question at all, but again, we're all just guessing at this point.
09-27-2012, 10:29 PM
#129
Rennlist Member
Stop
Im not noticing a HUGE gain in low RPM "go" power, but over 4k, its an entirely different car.
There IS more..my up the mountain drive 2x a day, no longer feels as labored in 4th gear, and certainly a lot more energetic in 3rd...but its the upper half of the range that rains down sunshine now.
Easily 640 Canadian Horsepower.
There IS more..my up the mountain drive 2x a day, no longer feels as labored in 4th gear, and certainly a lot more energetic in 3rd...but its the upper half of the range that rains down sunshine now.
Easily 640 Canadian Horsepower.
09-27-2012, 10:56 PM
#130
Yes.
I wasn't trying to pick at ya or anything. It's just the only cars that I can recall that are putting around 325rwhp down NA are GT's with full exhaust (or at least X-back) with a LOT of Sharktuning. I believe there are some GTS' also.
I don't think that 300rwhp to start with is out of the question at all, but again, we're all just guessing at this point.
I wasn't trying to pick at ya or anything. It's just the only cars that I can recall that are putting around 325rwhp down NA are GT's with full exhaust (or at least X-back) with a LOT of Sharktuning. I believe there are some GTS' also.
I don't think that 300rwhp to start with is out of the question at all, but again, we're all just guessing at this point.
09-29-2012, 11:47 AM
#131
Sean, at what point are you feeling the boost kick in?. I feel noticable power increase at just over 3000. Some of that could be the Sharktuning so maybe the boost is kicking in at a higher RPM.
09-29-2012, 11:51 AM
#132
Rennlist Member
Thread Starter
I notice it right off the line and it steadily increases as RPM's go up. Right at 4k I feel a real good punch and by 5500 I'm really in the back of my seat.
09-29-2012, 01:14 PM
#133
Rennlist Member
Jim Coreman's GT was putting down around 325rwhp or more with Devek Level 2 headers, X pipe and Sharktuning.
It makes more than that now with some different cams.
It makes more than that now with some different cams.
Yes.
I wasn't trying to pick at ya or anything. It's just the only cars that I can recall that are putting around 325rwhp down NA are GT's with full exhaust (or at least X-back) with a LOT of Sharktuning. I believe there are some GTS' also.
I don't think that 300rwhp to start with is out of the question at all, but again, we're all just guessing at this point.
I wasn't trying to pick at ya or anything. It's just the only cars that I can recall that are putting around 325rwhp down NA are GT's with full exhaust (or at least X-back) with a LOT of Sharktuning. I believe there are some GTS' also.
I don't think that 300rwhp to start with is out of the question at all, but again, we're all just guessing at this point.
09-29-2012, 01:16 PM
#134
Rennlist Member
Try adding 3 deg or more ignition advance at med and high loads below 3k rpm with the SharkTuner. You can do that with no knocks. It will certainly help the low end. This is also useful on N/A engines as well.
Last edited by John Speake; 09-29-2012 at 01:40 PM.
