4 speed vs 5 speed
07-05-2003, 11:57 PM
#16
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I'll take the strength, simplicity, and taller gears of a stock 4spd over the 5spd any day. 100mph in 2nd gear really gets my adrenalin pumping. If I had a dollar for everytime this was debated I'd be a rich man. Eric
07-06-2003, 10:22 AM
#17
Nordschleife Master
The factory 1989 G50/50 is much stronger than the 930 4spd transmission. So is the G50/52 from the 91-94 turbos, so is the G50 6spd version in the later turbos.
07-07-2003, 12:43 AM
#19
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Guys correct me if I'm wrong, but I thought the 935's and 934's used the type 930 tranny. If this is so that says alot about the strength of the tranny considering the amount of HP these cars put out. Eric
07-07-2003, 02:40 PM
#22
Nordschleife Master
No argument here with the strength of the 930 box. However, there is NO comparison as to the quality of shifting, and the spacing of the gears for optimal power delivery, even with mega HP 930s. How many of you have had the opportunity to drive both?
07-07-2003, 04:45 PM
#23
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Geoff - not sure this counts, but in regards to your question, I have a 993TT with 520 HP and an 86 930 with somewhere in the 480 HP range (still need to get it up on the dyno). In terms of staying in the power range the 4 speed gearing compares favorably to the 6 speed 993TT gearing. The 6 speed 1st gear is so short as to be almost useless. I think that with equally good drivers that know how to launch these cars (not me) my 930 with its 4 speed may beat my 993TT in 0-60 and 1/4 mile. Now on the track and at higher speeds, the 993TT would walk away. I think the 930 would have an advantage up through its 2nd gear (maybe 95-100 MPH) at which point the midrange gearing of the 993TT would start to pull on it.
This is just my gut instinct from driving both cars, but Stephen Kaspar (porschephd and owner of Imagine Auto) also had similarly set up cars and I think he felt the same way. As far as ease of shifting, the 993TT 6 speed is way better.
This is just my gut instinct from driving both cars, but Stephen Kaspar (porschephd and owner of Imagine Auto) also had similarly set up cars and I think he felt the same way. As far as ease of shifting, the 993TT 6 speed is way better.
07-07-2003, 05:33 PM
#24
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I think the original question was whether the 4 speed or 5 speed was ultimately more durable in high HP situations , followed by straight line shifting performance. 4 speed vs 5 speed. I have always understood that the 4 speed was more durable and set up for racing.....Do we have a concensus?
Rick
'78 930
Rick
'78 930
07-07-2003, 07:55 PM
#25
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Rick - that is my understanding as well - and the primary reason why the 4 speed is not optimally set up for street driving (unless of course your pit crew pushes out of each stop light).
07-07-2003, 09:48 PM
#26
Nordschleife Master
Do not confuse a G50/01,02,21 with the G50/50 or 52. The former are the N/A trans and are weaker than a 930 box. The 50 and 52 are stronger than the 930 box.
07-08-2003, 10:22 AM
#27
Nordschleife Master
Sameer,
Phd's Monster was also twin turbo and made quite a bit of torque at low rpm which helped to mask the wide ratios. I have yet to see a high hp 930 single turbo where the boost came on before 3500 rpm. Following you guys logic, one should rip out the 6spd trans in a Viper and put in an old wide ratio trans from a Hemi "since it is more matched to the broad torque range" Doesn't make sense to me.
Phd's Monster was also twin turbo and made quite a bit of torque at low rpm which helped to mask the wide ratios. I have yet to see a high hp 930 single turbo where the boost came on before 3500 rpm. Following you guys logic, one should rip out the 6spd trans in a Viper and put in an old wide ratio trans from a Hemi "since it is more matched to the broad torque range" Doesn't make sense to me.
07-08-2003, 01:42 PM
#29
Nordschleife Master
Touche. To me, high HP is 450+FWHP. My comparison is from my friend's 930 with 8.0:1, T04E-60, GT2 Evo cams, Haltech and 540hp@1bar with the 4spd is miserable. Worse when the car was stock. My car with 7.2:1, T04S-66, 964 cams, MoTec and 540hp@.7bar with the 5spd or shortened 5spd is so much smoother because the car is always on the power. It is much faster under any condition and much easier to drive.
07-09-2003, 09:14 PM
#30
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Geoffrey, If I remember right (maybe not) a while back someone said that the GT2 EVO cams did not come into the power band until very high RPM, something like 5k and up. If my assumption is correct you would indeed have to work hard to keep the RPMs in the power band. That could explain the problem with your friends turbo not working very well with the 4 speed. My 88 makes 385 RWHP and starts on boost around 3000 going to full boost at 3500 and I think the 4 speed gives me a great advantage on the track due to the long power band and one less shift. Just my preference. I'm basically lazy. I admit that it could shift better though. Bud