What is the stock power rating of the 3.2 Liter from '86?
I found numbers for the 3.0 in the FAQ [180hp / 240 trq] but nothing for the 3.2. [NA, not turbo]

How much hp / trq would you guess the following mods would add:
Heads Ported & Polished / Flowed
Chiped ECU [I'm in the dark about Chips for these cars...I'm assuming its just a fuel chip?]
"Turbo Evo" Cams [I haven't been able to determin the duration of this cam, but it has a really lumpy idle <img border="0" title="" alt="[Wink]" src="wink.gif" /> ]
Bursch Exhaust
SSI Heater box
Removed AC & Heating duct work & blower [I included this, but I don't know if it makes a difference in power]

 

Porsche Redbook says stock 86'
207 hp @ 5900 rpm.

RoW Carrera's show as 231 hp at same rpm.

Don't know about the mods...

 

Does it give the max torque listing as well?

 

192 foot pounds at 4800 rpm.
RoW's were 209 at same rpm.

so the books says.....

 

I would recommend Bruce Anderson's book "Porsche 911 Performance Handbook". That would answer a lot of your questions about what mods would do what to the power. He actually did a multi-stage comparison on a 3.2 motor. I think it answers exactly what you're asking.

 

You might want to check out Bruce Anderson's "Performance Handboook" - there may be some information re: some of the mods you mentioned. He covered the 'bolt-ons' for the 3.0 SC engines - the 74 & earlier sport exhaust with the SSI's supposedly added 17-22 HP, depending on the dyno used and the year of the engine.

 

So were the stats on the 3.0 that I found wrong?
If the 3.2 is only 207hp & 192 ft lbs, then the 3.0 can't have 245 ft lbs of torque....

 

doh, stupid me, i just realized the 3.0 numbers I read were in Nm not ft/lbs.

 

1989 Carrera 3.2 (122K miles) with SSIs, a Monty single out muffler, and a custom chip:

240hp / 217ftlbs torque at the crank

That's using 15% driveline loss. The "at the wheels" dyno numbers were:

208.4hp / 189.4ftlbs torque

 

I have 3 dyno runs here myself when we were doing the eRAM testing.

193hp with 176 torque, and 198hp/181ft/lbs after the eRAM mod. this was a bone stock 911 3.2

Second 911 ran a little torquier, 202hp/187ftlbs
and 208/192 with the eRAM. the only mod here was a free flow muffler

I think Porsche has underrated most 911s!!

Mk

</font><blockquote><font size="1" face="Verdana,Tahoma,Helvetica">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Helvetica">Originally posted by GeorgeM:
<strong>1989 Carrera 3.2 (122K miles) with SSIs, a Monty single out muffler, and a custom chip:

240hp / 217ftlbs torque at the crank

That's using 15% driveline loss. The "at the wheels" dyno numbers were:

208.4hp / 189.4ftlbs torque</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Helvetica">

 

I'm pretty sure Porsche underrated the hp/torque numbers, at least in U.S. cars. I do not know why.

If the dyno figures Mark got were accurate, that's about what a ROW 3.2 should be putting out, according to Porsche's figures. Was there really any difference between the U.S. and ROW cars, or are the ratings just different?

 

Porsche has a history of being conservative with performance claims. As an example they promised 0-100 km/h in 6.1 seconds for the RoW 3.2 Carrera. After reading the Brookland Books article collection about this particular model, the "worst" test time I can find is 6.0 seconds and the best is 5.6 seconds (Auto Motor und Sport, 1984). The figures promised by Porsche are however stated for a car with "unladen weight" (spelling!?). If I understand it correctly this is with full tank, a passanger and 100 kg of load.

For 0-60 mph (app. 0-96.5 kmh), the times are significantly lower, the best I could find is 5.3 seconds (from the 5.6s 0-100 kmh run by Auto Motor und Sport), most are 5.5-5.7 seconds, measured by American magazines.

Also worth mentioning is the topspeed noted by the German Auto Motor und Sport on a standard RoW model 3.2 Carrera: 157.5 mph! They must have had a very, very nice, well run in, specimen. Factory claims 245 kmh (152,2 mph). Which also seems to have been bettered in those few tests that really had the opportunities to try out the top speed.

Don't know if there are any power/performance differences on an imported RoW-model and a US-model in the US, I've understood RoW:s have to be altered to be legal. But for "real" RoW Carrera and a US-model Carrera there certainly are differences in power output as well as performance. Another factor to weigh in is that the RoW-models usually wasn't delivered with as much luxury equipment as the US-models and consequently had lower weight.

According to factory figures for standard models:

84-85 RoW Carrera
231hp@5900rpm, 284NM@4800rpm, 1160 kg

86-89 RoW Carrera
231hp@5900rpm, 284NM@4800rpm, 1210 kg

84-85 US Carrera
207hp@5900rpm, 260 NM@4800rpm, 1250 kg

86 US Carrera
same power as 84-85, 1300 kg

87-89 US Carrera
217hp@5900rpm, 265NM@4800rpm, 1250 kg

Cheers

Christian Karlsson

84 Carrera

 

Thanks for the input Christian.

I understand that the factory-rated hp and torque figures are different for RoW and U.S. models, however I do not know if there is actually any difference in the motors.

What is actually different, if anything, between a RoW 3.2 motor and a U.S. 3.2 motor?

Certainly optional equipment, like a sun roof or power seat can add weight, and therefore affect performance, but that does not account for any hp differences.

I have a book (which I don't have handy) containing several road tests from both European and American magazines. Car and Driver also got a 0-60 time of 5.3 for a U.S. model 1984 Carrera.

So where are the differences that account for an almost 25 hp disparity between a RoW '84 and a U.S. '84? And why are they not apparent in road tests?

Thanks,
Sean

 

Relating power output to reported 0-60 times in these cars is an iffy proposition at best.

The owners manual for my '86( stock) shows around 6.3 on a graph but I've seen numbers from the mid 5s to 7secs reported.

My guess is that a major variable is how much the tester wants to abuse the clutch/drivetrain and the tranny on the 1-2 shift.

My 94 Vette (LT1 6spd)was defintiely quicker 0-60(5.5?)but the smooth surge of the Pcar in 2nd gear is a wondrous thing.

 

Gerry, I completely agree that 0-60 times are very much dependent on driver, conditions, etc. I don't even want to get into the BS times those mags publish.

What I would like to know is what the differences are between a RoW 3.2 and a U.S. 3.2. That's it. What is different, if anything, in the motor that makes them rate it at 15-25 more hp depending on the year? Does anybody really know? Is there actually a difference?!