Building a Turbo S2
05-25-2014, 08:23 PM
#167
Burning Brakes
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The 928's a great car, don't get me wrong. I think it has more potential than most give it credit for, but that's the problem; most don't give it any credit. The few that do concentrate on the S4 for good reasons. If you think building a 944 Turbo S is expensive you ain't seen nothin'
John's '87 twins start at $16K and you send him a whole car first. That's just for the turbo engine. Dan doesn't come right out and say what block his car was based on but I'm going to guess he started with a 1989 2.7L Turbo S? Anyone know for sure? Dan, you still on this site?
05-25-2014, 10:03 PM
#168
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the 928 is a very good car for gran touring and desert events like the Silverstate Classic....
but my choice would still be the new Vette or my 968.
what would you think of running a desert race with an engine like this one in your 944?
he's got the intake set in reverse just like Tony G's track (944)....
weighs about the same as a 3.0 liter turbo. and will fit perfect in your upcoming S2.
http://www.vetteweb.com/tech/vemp_12...oke_of_genius/
I'm having the same engine (only with an oem LS9 cam for nice street manners) installed in my 968.
*Date was pushed back slightly, but she'll be done soon.
but my choice would still be the new Vette or my 968.
what would you think of running a desert race with an engine like this one in your 944?
he's got the intake set in reverse just like Tony G's track (944)....
weighs about the same as a 3.0 liter turbo. and will fit perfect in your upcoming S2.
http://www.vetteweb.com/tech/vemp_12...oke_of_genius/
I'm having the same engine (only with an oem LS9 cam for nice street manners) installed in my 968.
*Date was pushed back slightly, but she'll be done soon.
05-25-2014, 11:01 PM
#169
Burning Brakes
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That's a very scary motor! Good luck with it, you're really going to drop that baby into a 968? What are you going to do for a torque tube and transmission?
05-26-2014, 02:07 AM
#170
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transmission is the 968 box with Audi A4 Diesel (taller euro car gears 3-6) built by Kevin Gross in Massachusetts. makes 194 mph @6000 rpm in top gear w/ 275/35/18. new Constantine shaft with Constantine Superbearings for the TT....
i'll replace the axles sometime next year.
stock 968 ratios;
1st; 3.182 :1
2nd; 2.000 :1
3rd; 1.435 :1
4th; 1.111 :1
5th; 0.912 :1
6th. 0.778 :1
final ratio 3.778 w/ open diff.
and w/ the new gears for the V8;
1st; 3.182 :1
2nd; 2.000 :1
3rd; 1.230 :1
4th; 0.930: 1
5th; 0.729 :1
6th. 0.600 :1
final ratio 3.778 w/ limited slip diff.
numbers; flat out, spirited and economy driving running the 25.6" tire.
notice the short ratio 1st and 2nd gears, but smooth transitions from 2nd to 6th w/ the new gears.
ratio ........ speed @ 6000 rpm ........ speed @ 4500 rpm ........ speed @ 3000 rpm ........ increase (mph) from previous gear @ 3000 rpm
.600 .................. 194.4 ........................... 146.0 ........................... 97.2 ............................ 17.2
.729 .................. 160.0 ........................... 120.0 ........................... 80.0 ............................ 17.3
.930 .................. 125.4 ............................ 94.1 ............................ 62.7 ............................ 15.3
1.230 ................. 94.8 ............................. 71.1 ............................ 47.4 ............................ 18.3
2.000 ................. 58.3 ............................. 43.7 ............................ 29.1 ............................ 10.8
3.182 ................. 36.7 ............................. 27.5 ............................ 18.3 .....................................................
and the oem transmission w/ very short gear shift points;
ratio ........ speed @ 6000 rpm ........ speed @ 4500 rpm ........ speed @ 3000 rpm ........ increase (mph) from previous gear @ 3000 rpm
0.778 .................. 149.9 ........................... 112.4 ........................... 74.9 ............................ 11.0
0.912 .................. 127.9 ............................ 95.9 ............................ 63.9 ............................ 7.8
1.111 .................. 112.2 ............................ 84.1 ............................ 56.1 ............................ 15.5
1.435 ................... 81.3 ............................. 61.0 ............................ 40.6 ............................ 14.0
2.000 ................... 58.3 ............................. 43.7 ............................ 29.1 ............................ 10.8
3.182 ................... 36.7 ............................. 27.5 ............................ 18.3 .....................................................
i'll replace the axles sometime next year.
stock 968 ratios;
1st; 3.182 :1
2nd; 2.000 :1
3rd; 1.435 :1
4th; 1.111 :1
5th; 0.912 :1
6th. 0.778 :1
final ratio 3.778 w/ open diff.
and w/ the new gears for the V8;
1st; 3.182 :1
2nd; 2.000 :1
3rd; 1.230 :1
4th; 0.930: 1
5th; 0.729 :1
6th. 0.600 :1
final ratio 3.778 w/ limited slip diff.
numbers; flat out, spirited and economy driving running the 25.6" tire.
notice the short ratio 1st and 2nd gears, but smooth transitions from 2nd to 6th w/ the new gears.
ratio ........ speed @ 6000 rpm ........ speed @ 4500 rpm ........ speed @ 3000 rpm ........ increase (mph) from previous gear @ 3000 rpm
.600 .................. 194.4 ........................... 146.0 ........................... 97.2 ............................ 17.2
.729 .................. 160.0 ........................... 120.0 ........................... 80.0 ............................ 17.3
.930 .................. 125.4 ............................ 94.1 ............................ 62.7 ............................ 15.3
1.230 ................. 94.8 ............................. 71.1 ............................ 47.4 ............................ 18.3
2.000 ................. 58.3 ............................. 43.7 ............................ 29.1 ............................ 10.8
3.182 ................. 36.7 ............................. 27.5 ............................ 18.3 .....................................................
and the oem transmission w/ very short gear shift points;
ratio ........ speed @ 6000 rpm ........ speed @ 4500 rpm ........ speed @ 3000 rpm ........ increase (mph) from previous gear @ 3000 rpm
0.778 .................. 149.9 ........................... 112.4 ........................... 74.9 ............................ 11.0
0.912 .................. 127.9 ............................ 95.9 ............................ 63.9 ............................ 7.8
1.111 .................. 112.2 ............................ 84.1 ............................ 56.1 ............................ 15.5
1.435 ................... 81.3 ............................. 61.0 ............................ 40.6 ............................ 14.0
2.000 ................... 58.3 ............................. 43.7 ............................ 29.1 ............................ 10.8
3.182 ................... 36.7 ............................. 27.5 ............................ 18.3 .....................................................
05-26-2014, 02:13 AM
#171
Burning Brakes
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