RajDatta

We are rooting for you bud. Your car is well equipped to do such a feat.
Raj

DFASTEST951

Thanks Raj!

RajDatta

If it helps, you can borrow my transaxle to get the gearing. This way I get to share the bragging rights, LOL.
Raj

DFASTEST951

lol!

Luis de Prat

One often overlooked fact is that the 944S2/951 actually has a lower aerodynamic drag coefficient than the 968. Go figure.

CarbonRevo

I don't know any other way to put it. I've done a lot of highway cruising and I normally drive 5-10mph over the limit. On 65mph roads, going 70-75, I rarely have people pass me. But since my speedo must be so off and I'm really only doing all of 60-65mph...how could I be in front of people when I'm sometimes doing "10mph under"?

The car runs now, and it seems as if I'll have to go get some videos to post up. There is no known record of this car having anything other then the trans it came with either. I know the S2's have a shorter first gear, but my car is reading 4-5mph off by 35mph? That doesn't seem too right.

I do have a friend with a GPS, so I'll so what we find. I'm not 100% backing my car does 140mph in 4th as I know the speedos are inaccurate, but 20mph off? I doubt that much. Thing is, I did have a car bus lengths behind me that reported speeds of 125-130mph. How was this so when we started at the same time, same gear, same stretch...yet I'm going 5mph slower?

Something doesn't line up. I'll have it figured out for sure once this Kansas weather gets nicer!

FRporscheman

Maybe most people on the road has an uncalibrated speedometer. It's not likely but possible.

DFASTEST, you put supercars to shame.

kasturbo

When are you going to get your car back together Joe? I'm ready to hear more stories.

luckett

What gear/R&P ratios did you use to calculate this? It looks like you used the 3.78 R&P. If you use the 3.44 R&P it looks like this:
MPH
RPM 1 2 3 4 5 6
1,000 6.8 10.8 15.0 19.4 23.7 27.7
1,100 7.5 11.9 16.5 21.4 26.0 30.5
1,200 8.1 12.9 18.1 23.3 28.4 33.3
1,300 8.8 14.0 19.6 25.3 30.8 36.1
1,400 9.5 15.1 21.1 27.2 33.1 38.8
1,500 10.2 16.2 22.6 29.1 35.5 41.6
1,600 10.9 17.3 24.1 31.1 37.9 44.4
1,700 11.5 18.3 25.6 33.0 40.2 47.2
1,800 12.2 19.4 27.1 35.0 42.6 49.9
1,900 12.9 20.5 28.6 36.9 45.0 52.7
2,000 13.6 21.6 30.1 38.8 47.3 55.5
2,100 14.2 22.7 31.6 40.8 49.7 58.3
2,200 14.9 23.7 33.1 42.7 52.1 61.0
2,300 15.6 24.8 34.6 44.7 54.4 63.8
2,400 16.3 25.9 36.1 46.6 56.8 66.6
2,500 17.0 27.0 37.6 48.6 59.2 69.4
2,600 17.6 28.1 39.1 50.5 61.5 72.1
2,700 18.3 29.1 40.6 52.4 63.9 74.9
2,800 19.0 30.2 42.1 54.4 66.3 77.7
2,900 19.7 31.3 43.6 56.3 68.6 80.5
3,000 20.3 32.4 45.1 58.3 71.0 83.2
3,100 21.0 33.5 46.6 60.2 73.4 86.0
3,200 21.7 34.5 48.1 62.2 75.7 88.8
3,300 22.4 35.6 49.6 64.1 78.1 91.6
3,400 23.1 36.7 51.1 66.0 80.5 94.3
3,500 23.7 37.8 52.6 68.0 82.8 97.1
3,600 24.4 38.8 54.2 69.9 85.2 99.9
3,700 25.1 39.9 55.7 71.9 87.6 102.7
3,800 25.8 41.0 57.2 73.8 89.9 105.4
3,900 26.5 42.1 58.7 75.8 92.3 108.2
4,000 27.1 43.2 60.2 77.7 94.7 111.0
4,100 27.8 44.2 61.7 79.6 97.0 113.8
4,200 28.5 45.3 63.2 81.6 99.4 116.5
4,300 29.2 46.4 64.7 83.5 101.8 119.3
4,400 29.8 47.5 66.2 85.5 104.1 122.1
4,500 30.5 48.6 67.7 87.4 106.5 124.9
4,600 31.2 49.6 69.2 89.3 108.9 127.6
4,700 31.9 50.7 70.7 91.3 111.3 130.4
4,800 32.6 51.8 72.2 93.2 113.6 133.2
4,900 33.2 52.9 73.7 95.2 116.0 136.0
5,000 33.9 54.0 75.2 97.1 118.4 138.7
5,100 34.6 55.0 76.7 99.1 120.7 141.5
5,200 35.3 56.1 78.2 101.0 123.1 144.3
5,300 35.9 57.2 79.7 102.9 125.5 147.1
5,400 36.6 58.3 81.2 104.9 127.8 149.8
5,500 37.3 59.3 82.7 106.8 130.2 152.6
5,600 38.0 60.4 84.2 108.8 132.6 155.4
5,700 38.7 61.5 85.7 110.7 134.9 158.2
5,800 39.3 62.6 87.2 112.7 137.3 160.9
5,900 40.0 63.7 88.7 114.6 139.7 163.7
6,000 40.7 64.7 90.3 116.5 142.0 166.5
6,100 41.4 65.8 91.8 118.5 144.4 169.3
6,200 42.1 66.9 93.3 120.4 146.8 172.0
6,300 42.7 68.0 94.8 122.4 149.1 174.8
6,400 43.4 69.1 96.3 124.3 151.5 177.6
6,500 44.1 70.1 97.8 126.3 153.9 180.4
6,600 44.8 71.2 99.3 128.2 156.2 183.1
6,700 45.4 72.3 100.8 130.1 158.6 185.9
6,800 46.1 73.4 102.3 132.1 161.0 188.7
6,900 46.8 74.5 103.8 134.0 163.3 191.5
7,000 47.5 75.5 105.3 136.0 165.7 194.2
7,100 48.2 76.6 106.8 137.9 168.1 197.0
7,200 48.8 77.7 108.3 139.8 170.4 199.8
7,300 49.5 78.8 109.8 141.8 172.8 202.6
7,400 50.2 79.9 111.3 143.7 175.2 205.3
7,500 50.9 80.9 112.8 145.7 177.5 208.1
7,600 51.5 82.0 114.3 147.6 179.9 210.9
7,700 52.2 83.1 115.8 149.6 182.3 213.7
7,800 52.9 84.2 117.3 151.5 184.6 216.4
7,900 53.6 85.2 118.8 153.4 187.0 219.2
8,000 54.3 86.3 120.3 155.4 189.4 222.0

968turbos2

What I am trying to clarify is what the stock 968 came with. Every stat I seem to find says 3.78. Does anyone know which diff went where?

PorscheDude1

According to the Porsche 968 technical specifications handbook (first edition) The final drive is listed as 3.778 for manual cars regardless of open or LSD.

The tip final drive is listed as 3.25

There is no mention of a 3.44 final drive.

luckett

https://rennlist.com/forums/showpost...56&postcount=5

luckett

It's the ring gear that is in question here, not the diff. The pinion is listed as a 9 tooth, but the ring gears are listed in PET with either 31 or 34 teeth.

PorscheDude1

00

CarbonRevo

Anyone willing to host some videos on youtube for me?

I can get these up as these prove my car is going faster then 120mph in 4th gear. For some odd reason, I had first thought my 140mph run was at 6500 revs. I was wrong. I had the same girl passenger tonight, and she wanted to go fast. We got on I-70 and proceeded to let 4th ride out. We came to about 135mph and had to slow for traffic. Once this guy moved, I got back on it and hit 143mph. This was not caught on video as it was night time...but I will have a +140mph run on video before long.

If someone can host these on youtube, PM your email address and I will get them sent asap.