200MPH setup and feedback
Registered User
Joined: Jul 2003
Posts: 227
From: San Diego, CA
Rep Power: 32
I have hit 176 with stock suspension albeit a Lucent alignment out in camarillo with the windows doen sunroof open and music blaring. I have a picture of my cluster at 160ish also with my camera phone- I believe that means it's pretty solid if I can one hand it. Also the road there is perfect so...
Thread Starter
|
Registered User
Joined: Apr 2005
Posts: 838
From: Arizona
Rep Power: 55
One time run
Originally posted by Kevin D
Here's your magical 200MPH formula sir: Start with an 02'-UP 3.6L C2 .....X74 suspension, TPC supercharger upgrade, 100-cell cats, bored out throttle body (has shown to add 8-to-10 rwhp on SC'ed cars on TPC dyno...and at only $300 for the machining of your stock TB its cheap), and slightly lower final rear gear ratio/pinion...wala!
I would NOT add any aero enhancements if your only mission is to hit 200mph in the top end/straight line run, the full X74 suspension on its own will keep the car stable at those speeds...any aero packages will simply increase drag to the point more HP is needed. And the standard C2 body with no aero enhancements is extremely slippery thru the air. Also I would suggest the TPC unit over the Evo becuase its a positive displacement SC as oppose to a centrifugal one (power everywhere as oppose to only in the extreme high rpm respectively) and with lower rear gearing, acceleration up to speed will be made more sluggish with the centrifugal set-up less likely cope. A positive displacement blower makes full boost low in the powerband and is *independent* of engine revs (i.e. full boost by 3K rpms in the case of the TPC kit...as oppose to redline for evo, with tall gears this becomes ever more important*)
Recap= ***02-UP C2
***X74
***TPC SC
***100 cell cats
***Ported TB
***lower rear pinion
PS: I think ~420RWHP(or 480BHP) in a "C2 body" car should be enough to hit the number*** (w/ proper gearing)
Here's your magical 200MPH formula sir: Start with an 02'-UP 3.6L C2 .....X74 suspension, TPC supercharger upgrade, 100-cell cats, bored out throttle body (has shown to add 8-to-10 rwhp on SC'ed cars on TPC dyno...and at only $300 for the machining of your stock TB its cheap), and slightly lower final rear gear ratio/pinion...wala!
I would NOT add any aero enhancements if your only mission is to hit 200mph in the top end/straight line run, the full X74 suspension on its own will keep the car stable at those speeds...any aero packages will simply increase drag to the point more HP is needed. And the standard C2 body with no aero enhancements is extremely slippery thru the air. Also I would suggest the TPC unit over the Evo becuase its a positive displacement SC as oppose to a centrifugal one (power everywhere as oppose to only in the extreme high rpm respectively) and with lower rear gearing, acceleration up to speed will be made more sluggish with the centrifugal set-up less likely cope. A positive displacement blower makes full boost low in the powerband and is *independent* of engine revs (i.e. full boost by 3K rpms in the case of the TPC kit...as oppose to redline for evo, with tall gears this becomes ever more important*)
Recap= ***02-UP C2
***X74
***TPC SC
***100 cell cats
***Ported TB
***lower rear pinion
PS: I think ~420RWHP(or 480BHP) in a "C2 body" car should be enough to hit the number*** (w/ proper gearing)
This would be a one time run maybe at bonnevile (straight line)since I'm out west and the car would have to be a 2001 c2 with centrigual SC maybe I hope I can get 430 or so out of the SC without dangerously boosting, although the TB mod should help along with running straight pipes. Changing tranny ratios would be nice but not possible that I know of in that year. Wondering if it is possible to pretest speed needed on a dyno as a base? I have gotton some really good feedback on suspensions at speed M030, pss9 and your suggestion.
Registered User
Joined: Jul 2003
Posts: 510
From: southern Ca
Rep Power: 45
Taller Gear?
You would need a much taller 6th gear and/or a much higher redlinethan 7300.
cheers
R
Registered User
Joined: Aug 2004
Posts: 2,134
From: Chicagoland
Rep Power: 123
Re: Taller Gear?
Originally posted by Ruf-Racer
I am not so sure about the need for a taller gear.If the rear end is 3:44, the top gear is some where around 0.76 and the tires are 18" (pirelli footprint=6.315') the car will go about 205 mph!
cheers
I am not so sure about the need for a taller gear.If the rear end is 3:44, the top gear is some where around 0.76 and the tires are 18" (pirelli footprint=6.315') the car will go about 205 mph!
cheers
Last edited by 1999Porsche911; Sep 11, 2005 at 11:16 AM.
Registered User
Joined: Aug 2005
Posts: 9
Rep Power: 0
200mph in a C4?
you're gonna need a ton more power. Aero is important as well. You should check out the german tuners 9ff. They did 243mph in a heavily modified 840hp Gt3. They apparentlky know a ton about aero and engines. I know that they build 400hp motors that are better than stock. If you want to go the FI route, a SC is a great way to start...personally the idea of SC an engine and not changing anything else...makes me think the motor will blow up one day.
you're gonna need a ton more power. Aero is important as well. You should check out the german tuners 9ff. They did 243mph in a heavily modified 840hp Gt3. They apparentlky know a ton about aero and engines. I know that they build 400hp motors that are better than stock. If you want to go the FI route, a SC is a great way to start...personally the idea of SC an engine and not changing anything else...makes me think the motor will blow up one day.
Last edited by Qirex; Sep 11, 2005 at 04:38 AM.
P1 911
Joined: Jul 2005
Posts: 296
From: Washington D.C.
Rep Power: 37
Re: One time run
Originally posted by Mother
This would be a one time run maybe at bonnevile (straight line)since I'm out west and the car would have to be a 2001 c2 with centrigual SC maybe I hope I can get 430 or so out of the SC without dangerously boosting, although the TB mod should help along with running straight pipes. Changing tranny ratios would be nice but not possible that I know of in that year. Wondering if it is possible to pretest speed needed on a dyno as a base? I have gotton some really good feedback on suspensions at speed M030, pss9 and your suggestion.
This would be a one time run maybe at bonnevile (straight line)since I'm out west and the car would have to be a 2001 c2 with centrigual SC maybe I hope I can get 430 or so out of the SC without dangerously boosting, although the TB mod should help along with running straight pipes. Changing tranny ratios would be nice but not possible that I know of in that year. Wondering if it is possible to pretest speed needed on a dyno as a base? I have gotton some really good feedback on suspensions at speed M030, pss9 and your suggestion.
Thread Starter
|
Registered User
Joined: Apr 2005
Posts: 838
From: Arizona
Rep Power: 55
graph
I found this graph a while back, but can't remember which engine(3.4 or 3.6). I'm pretty sure it was a SC'd. I've read some posts of the 030 suspension and some felt it was light and tended to wander at higher speeds. I will have to use areo dynamics also my SC will be using ram air through the rear foil. Maybe I should just hope for a large tail wind.
Last edited by Mother; Mar 14, 2006 at 08:17 PM.
Registered User
Joined: Aug 2004
Posts: 2,134
From: Chicagoland
Rep Power: 123
Re: graph
Originally posted by Mother
I found this graph a while back, but can't remember which engine(3.4 or 3.6). I'm pretty sure it was a SC'd. I've read some posts of the 030 suspension and some felt it was light and tended to wander at higher speeds. I will have to use areo dynamics also my SC will be using ram air through the rear foil. Maybe I should just hope for a large tail wind.
I found this graph a while back, but can't remember which engine(3.4 or 3.6). I'm pretty sure it was a SC'd. I've read some posts of the 030 suspension and some felt it was light and tended to wander at higher speeds. I will have to use areo dynamics also my SC will be using ram air through the rear foil. Maybe I should just hope for a large tail wind.
Ram air? With forced induction? Work on making more cooler air available for the blower and not worrying about forcing air into the blower. You could never go fast enough to overcome the negative pressure of the SC's intake. RAM is beneficial to NA cars only.
Thread Starter
|
Registered User
Joined: Apr 2005
Posts: 838
From: Arizona
Rep Power: 55
Sorry should have clarified, just pulling outside (cooler) air in though the ram air ducting in foil. Ice can be used in my SC water tank, but ram air would make a nice topic for SC efficency however, I think some engineers would have something to say about "only" NA cars utilizing ram air. The tires you mentioned is a idea, which I've been looking for some formulas (tires vs gear ratios) with no luck.
Registered User
Joined: Aug 2004
Posts: 2,134
From: Chicagoland
Rep Power: 123
Originally posted by neil.schneider
I am not sure that chart is right. I am pretty sure I have done 100 in third before. More than once, especially with my old engine.
I am not sure that chart is right. I am pretty sure I have done 100 in third before. More than once, especially with my old engine.
Registered User
Joined: Aug 2004
Posts: 2,000
From: Austin, TX
Rep Power: 108
Re: Re: Taller Gear?
Originally posted by 1999Porsche911
Rear gear is 3.444 and 6th is .84, so redo your calculations. Your only hope is to go with a larger diameter tires to overcome mechanical limits of the gears.
Rear gear is 3.444 and 6th is .84, so redo your calculations. Your only hope is to go with a larger diameter tires to overcome mechanical limits of the gears.
Also, redline in 3rd on my car is an indicated 103-104 mph. There's speedo error, but the graph looks right, so we're nowhere near 200mp at redline in 6th.
I was kidding about the dubs, BTW.
Registered User
Joined: Feb 2005
Posts: 972
From: Miami-Boston
Rep Power: 60
I have only gotten to 152 with the top down on an 03 c4s Cab and it felt very solid considering the top was down and 3 people were in the car. A girl was in the back seat and she had long hair and she said it felt like needles when her hair would hit her face. I was on a regular road (US1 in Miami) so since there were lights at the intersection I did not want to go any faster since you have to brake like 3 blocks away at that speed if you get a red light. Is the 4s more stable at higher speeds since its widebody and heavier?
