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Rotrex Supercharger thread

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Old 09-27-2012 | 04:27 PM
  #106  
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Originally Posted by Jon B.
While I see your point here, why not take it to the dragstrip? That is a pretty good indicator of "real-world" power IMO. I'm just like you though, I really couldn't care less about a big power number, just so long as the car works in the real world. So, whatever numbers I get whenever I get around to supercharging my car will just be numbers, and when I take it to the track it'll be the real test. Still not gonna be as quick as my pickup though!
Pretty much my thought process as well, I'm only going to dyno so it will give others the information they want. Now when I get to a dyno will be a different story.
Old 09-27-2012 | 04:51 PM
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Originally Posted by rgs944
I likely will never dyno because I am worried about modern steet drivabilty over peak rpm range HP. I think most good cars can handle another 100 or maybe even 150 Hp OK. It is pretty clear to anyone that if you get beyond that you need to start moddifing to no end or risk damaging your car. The low boost works great for me and I would never own another 928 without it. I don't need to be the fastest car around, but with all the big engines being made again I do want to know that I can keep up with the pickup next to me.
So it's kind of like getting a ***** extension without really knowing if it extends things. You think it's bigger, but you don't care, because it feels bigger. And now you can tell everyone that you have a bigger *****. So when people ask how big, you'll say what?

Old 09-27-2012 | 05:02 PM
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self edit

Last edited by victor25; 09-27-2012 at 06:03 PM.
Old 09-27-2012 | 05:27 PM
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Originally Posted by rgs944
I likely will never dyno because I am worried about modern steet drivabilty over peak rpm range HP. I think most good cars can handle another 100 or maybe even 150 Hp OK. It is pretty clear to anyone that if you get beyond that you need to start moddifing to no end or risk damaging your car. The low boost works great for me and I would never own another 928 without it. I don't need to be the fastest car around, but with all the big engines being made again I do want to know that I can keep up with the pickup next to me.
And what assumptions about your driving style should one make after the above comments ??
Old 09-27-2012 | 05:34 PM
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Originally Posted by rgs944
I likely will never dyno because I am worried about modern steet drivabilty over peak rpm range HP. I think most good cars can handle another 100 or maybe even 150 Hp OK. It is pretty clear to anyone that if you get beyond that you need to start moddifing to no end or risk damaging your car. The low boost works great for me and I would never own another 928 without it. I don't need to be the fastest car around, but with all the big engines being made again I do want to know that I can keep up with the pickup next to me.
Future 308 Ferrari owner....
Old 09-27-2012 | 05:43 PM
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Originally Posted by AO
So it's kind of like getting a ***** extension without really knowing if it extends things. You think it's bigger, but you don't care, because it feels bigger. And now you can tell everyone that you have a bigger *****. So when people ask how big, you'll say what?

Funny stuff, actually most people don't talk about HP #'s because most people know its about like asking someone how big the fish was. You get a straight answer almost never. Most just want to feel the seat kickback or see the wheels spin and ask how fast will it go. Don't know of anyone yet who's ever scored after showing a girl their dyno sheet, but of course I can't say I ever met anyone who's ever tried either. lol. Seriously though, If I was going to put a guesstimate on it I would say the sharktuning and boost gave the car about 35% more power. So if I started with say 325 rwhp considering the exhaust mods and weighing the factor that it is an old engine. Without being exact I think I might be anywhere from 410 to 440 rwhp which is pretty nice to get from point A to point B. I think it is great simple bolt on street performance for under $5K.
Old 09-27-2012 | 05:52 PM
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Originally Posted by rgs944
Seriously though, If I was going to put a guesstimate on it I would say the sharktuning and boost gave the car about 35% more power. So if I started with say 325 rwhp considering the exhaust mods and weighing the factor that it is an old engine. Without being exact I think I might be anywhere from 410 to 440 rwhp which is pretty nice to get from point A to point B. I think it is great simple bolt on street performance for under $5K.
Since we're just guessing here, I'm gonna say you'd be better off erring on the low side. I'm fairly certain your car was nowhere near 325RWHP prior to the supercharger. So, let's say 300 and call what you're feeling around 385RWHP.
Old 09-27-2012 | 05:55 PM
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Originally Posted by GregBBRD
Future 308 Ferrari owner....
Old 09-27-2012 | 06:00 PM
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Much of the grin factor is probably the higher low RPM torque much like a big block old muscle car where you could smoke the tires ( the narrow low traction of the period) pretty much any where in the lower gears no need to use RPM and downshifting. Same with having 4:30 rear gears in the 428 super cobrajet the pull in first gear while brief was awesome !
Old 09-27-2012 | 06:06 PM
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Originally Posted by James Bailey
Much of the grin factor is probably the higher low RPM torque much like a big block old muscle car where you could smoke the tires ( the narrow low traction of the period) pretty much any where in the lower gears no need to use RPM and downshifting. Same with having 4:30 rear gears in the 428 super cobrajet the pull in first gear while brief was awesome !

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.
Old 09-27-2012 | 06:24 PM
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This is the best measure of horsepower that I know of!

Old 09-27-2012 | 07:25 PM
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Originally Posted by James Bailey
And what assumptions about your driving style should one make after the above comments ??
Probably the assumption that when a lady in a mini van floors it, I can touch the accelator slightly, have the tach travel from 2200 rpm all the way up to a whopping 3400 rpms, and still stay with traffic. If I floor it to get a thrill it is sparingly and well away from traffic.

Last edited by rgs944; 09-27-2012 at 07:57 PM.
Old 09-27-2012 | 07:37 PM
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Originally Posted by Jon B.
Since we're just guessing here, I'm gonna say you'd be better off erring on the low side. I'm fairly certain your car was nowhere near 325RWHP prior to the supercharger. So, let's say 300 and call what you're feeling around 385RWHP.
A lot of people have documented with exhaust mods and a few other small mods to get about a 35hp increase. So if my car started with 280 when I got it with only 109,000 on it. Then I did a lot of refreshing to maybe bring it back to 290 or 300. Add in the mods which might add as much as 35HP. I think 325rwhp is a very reasonable estimation on what I started with. Maybe its wrong but I don't think it's being completely unrealistic. Unless Porsche's factory #'s are off that much.
Old 09-27-2012 | 07:39 PM
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deleted.

Last edited by M. Requin; 09-27-2012 at 07:55 PM. Reason: content
Old 09-27-2012 | 07:41 PM
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Originally Posted by M. Requin
My nomination for the worst thread in many months.
Yet you felt the need to add more **** to it.


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