313 km/h video in a 951
#46
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Originally Posted by toddk911
My understading is the 951 gearing is the only limiting factor, not hp. In regards to 200.
Our 5th is sooo short. I know at highway speeds going from 4th to 5th only drops the revs by a few hundred. basically 4 speed with overdrive![Smilie](https://rennlist.com/forums/images/smilies/smile.gif)
A nice 6 speed would do the trick![Smilie](https://rennlist.com/forums/images/smilies/smile.gif)
Our 5th is sooo short. I know at highway speeds going from 4th to 5th only drops the revs by a few hundred. basically 4 speed with overdrive
![Smilie](https://rennlist.com/forums/images/smilies/smile.gif)
A nice 6 speed would do the trick
![Smilie](https://rennlist.com/forums/images/smilies/smile.gif)
#47
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My calcs from www.scirocco.org (gears link) are as follows:
Tire: 245/50r18
Final Drive: 3.38 (stock '86 turbo, European car as source)
5th Gear: 0.83 (stock '86 turbo, European car as source)
Engine rpm: 6800
320 km/h or 199mph. However I'm sure that due to centrifical forces the tire diameter must increase a few millimeters thus pushing you over the 200mph.
Now the trick would be to generate enough hp at 6800 rpm to overcome wind... what would that take??? 450hp?
Tire: 245/50r18
Final Drive: 3.38 (stock '86 turbo, European car as source)
5th Gear: 0.83 (stock '86 turbo, European car as source)
Engine rpm: 6800
320 km/h or 199mph. However I'm sure that due to centrifical forces the tire diameter must increase a few millimeters thus pushing you over the 200mph.
Now the trick would be to generate enough hp at 6800 rpm to overcome wind... what would that take??? 450hp?
#48
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But who in here is able to run that high of revs with out rev limit?
I have GURU chips and still hit it at like 6,500, give or take.
I have GURU chips and still hit it at like 6,500, give or take.
#49
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I'm no expert here, but couldn't you run Stand Alone??? 6800 rpm isn't much for a 4 banger, I've run 7200+ in others, mind you they were smaller displacement (lighter pistons, less reciprocating mass, etc...)
#51
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Originally Posted by Campeck
dont forget the speedo is ALWAYS off.
X 2
![Roll Eyes (Sarcastic)](https://rennlist.com/forums/images/smilies/rolleyes.gif)
How do I know? Because I have been navigating for an average of 145 mph over 96 miles and we hit 144.976 mph which earned us second place in the 145 class..
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#52
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look here to see the differencve between the 17 and 18 inch wheels on teh same car ( a tuned RS)
then you know what is the difference for a 16 and a 18 Inch wheel
![](http://www-public.tu-bs.de:8080/~y0003315/shk300hp.jpg)
and do not forget I have to slow down because of otehr cars otherwise the car would go even faster. Also the 30 mm higher in the rear creates much more downforce and I I also run minimum low in teh front and I use a front spliter. I think this alone reduce the top speed by about 20 km/h
3 mm higher in the front on a Gt3 cup car gives you 3 km/h more top speed
Konstantin
then you know what is the difference for a 16 and a 18 Inch wheel
![](http://www-public.tu-bs.de:8080/~y0003315/shk300hp.jpg)
and do not forget I have to slow down because of otehr cars otherwise the car would go even faster. Also the 30 mm higher in the rear creates much more downforce and I I also run minimum low in teh front and I use a front spliter. I think this alone reduce the top speed by about 20 km/h
3 mm higher in the front on a Gt3 cup car gives you 3 km/h more top speed
Konstantin
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Sure, bypassing the stock systems of rev limit, fuel cut etc. is not the issue.
The issue is how many revs will a stock motor handle???
Rebuilt stock??
There are plenty of small street/stock motors out there running 7,8,9K rpms. But what lets those motrors do that and not ours???
The issue is how many revs will a stock motor handle???
Rebuilt stock??
There are plenty of small street/stock motors out there running 7,8,9K rpms. But what lets those motrors do that and not ours???
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WOW, I never would have guess wheel diameters would even affect accelleration times.
Is the difference linear?
Is the difference linear?
#55
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Originally Posted by toddk911
The issue is how many revs will a stock motor handle???
Originally Posted by toddk911
There are plenty of small street/stock motors out there running 7,8,9K rpms. But what lets those motrors do that and not ours???
#57
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Originally Posted by MPD47
7k, then you'll start seeing increased wear.
not sure about the turbos (because it seems NO ONE can answer my question if turbo valve springs are stronger than the NA's.) but over 6,600rpm my valves start to float. (massive backfiring through intake)
#59
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What these motor can rev to??? I haven't a clue.
Well if 6800rpm doesn't do it for you then at 6500 and a 285/50r18 you'll hit 200mph
But i think the point may be missed here, Konstantin mentioned he is running 285/18's pretty sure they're not 50 series, but he's also said he altered the gear ratios for top end. While this may be great for the Fatherland here in North America it doesn't make sence for public driving, sure an all out race machine could be driven to those extremes but it's not going to have stock motors, heads, valve springs or anything...
I was just throwing out some hypothetical numbers, being new to the p-car world I have no idea really what the rev limits are for a 2.5l four cylinder eight valve motor. What I know is you shift before the needle gets into the red
And yes I agree, More pictures/video's.
After reviewing the video the highest I saw the tach read was somewhere between 6700 and 6800 around 310kph but it's really hard to estimate from the sharp angle... and we all know how accurate stock gauges are... not to take anything away from Konstantin's run it's stil crazy fast!
Well if 6800rpm doesn't do it for you then at 6500 and a 285/50r18 you'll hit 200mph
But i think the point may be missed here, Konstantin mentioned he is running 285/18's pretty sure they're not 50 series, but he's also said he altered the gear ratios for top end. While this may be great for the Fatherland here in North America it doesn't make sence for public driving, sure an all out race machine could be driven to those extremes but it's not going to have stock motors, heads, valve springs or anything...
I was just throwing out some hypothetical numbers, being new to the p-car world I have no idea really what the rev limits are for a 2.5l four cylinder eight valve motor. What I know is you shift before the needle gets into the red
![Smilie](https://rennlist.com/forums/images/smilies/smile.gif)
And yes I agree, More pictures/video's.
After reviewing the video the highest I saw the tach read was somewhere between 6700 and 6800 around 310kph but it's really hard to estimate from the sharp angle... and we all know how accurate stock gauges are... not to take anything away from Konstantin's run it's stil crazy fast!
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Originally Posted by Campeck
not sure about the turbos (because it seems NO ONE can answer my question if turbo valve springs are stronger than the NA's.)
They are 20% stronger than a Gt3 cup
we tested all of them so these are not numbers from a book or heard say etc.
Konstantin