|
|
|
|
| Author |
|
|
All Spooled Up
Join Date: May 2009
Location: Between NE and Central PA
Posts: 2,516
|
How low will it go, without lugging?
What is the lowest rpm that you are supposed to go (under load) on a 951?
The reason I ask, is that at anything under 2K, I get substantial vibes, like the car is lugging, unless I am VERY light on the pedal. I can run the 924S down to 1500 without experiencing this. Is this normal? Why the difference?
__________________
>gray 89 951S - K27/8, MAF, 3" intake, 3" exhaust w/separate waste pipe, 55# inj, late cam; >red 87 924S - chip, K&N, punched-out cat&muffler >black 80 924 - (sold) >maroon 77 924 - auto (sold) |
||
03-05-2010, 10:32 PM
|
|
|
Registered
Join Date: Jun 2003
Location: Phoenix, AZ
Posts: 1,327
|
depends if you're uphill/downhill/flat. uphill, i try to not get below 3k.
__________________
87 951, K27/6, Almond Beige, 17" Turbotwist 87 944S, alpine white, 5sp died a violent death 84 944, silver/brown, auto, gone but not forgotten "may the force be with you" |
||
|
03-06-2010, 01:21 AM
|
|
|
All Spooled Up
Join Date: May 2009
Location: Between NE and Central PA
Posts: 2,516
|
Quote:
__________________
>gray 89 951S - K27/8, MAF, 3" intake, 3" exhaust w/separate waste pipe, 55# inj, late cam; >red 87 924S - chip, K&N, punched-out cat&muffler >black 80 924 - (sold) >maroon 77 924 - auto (sold) |
||
|
03-06-2010, 05:42 AM
|
|
|
Super Moderator
|
when i'm tuning the car for WOT fuel map, i start out at full load at 1200rpm with no vibration problems.
__________________
'89 turbo-s (2.7, wolf3d ems, garrett dbb turbo, tial 46mm, etc. fast!) |
||
|
03-06-2010, 08:54 AM
|
|
|
Architect / Car Guy
Join Date: Jan 2009
Location: Atlanta, Ga
Posts: 699
|
What are your engine mounts looking like?
__________________
Looking Forward to getting my First "car" Porsche 951 |
||
|
03-06-2010, 10:50 AM
|
|
|
All Spooled Up
Join Date: May 2009
Location: Between NE and Central PA
Posts: 2,516
|
I'll have to take a close look. What should I be looking for?
__________________
>gray 89 951S - K27/8, MAF, 3" intake, 3" exhaust w/separate waste pipe, 55# inj, late cam; >red 87 924S - chip, K&N, punched-out cat&muffler >black 80 924 - (sold) >maroon 77 924 - auto (sold) |
||
|
03-06-2010, 11:36 AM
|
|
|
|
Architect / Car Guy
Join Date: Jan 2009
Location: Atlanta, Ga
Posts: 699
|
Quote:
__________________
Looking Forward to getting my First "car" Porsche 951 |
||
|
03-06-2010, 11:45 AM
|
|
|
Registered
|
Had the same problem. Turns out my engine mounts had completely disintegrated. I'm looking forward to testing the car with the new mounts.
__________________
1990 944 T: 100 000 km/63K miles, 1997 986 2.5L: 95 000 km/60K miles, Living in the trackless land of plenty! |
||
|
03-07-2010, 04:40 AM
|
|
|
All Spooled Up
Join Date: May 2009
Location: Between NE and Central PA
Posts: 2,516
|
Quote:
What's strange is that my 924S also has vibration issues, but they are of a completely different sort. At idle, you can feel the whole car shaking. But as soon as you touch the gas pedal, the vibes instantly vanish. Anyone ever had THAT symptom?
__________________
>gray 89 951S - K27/8, MAF, 3" intake, 3" exhaust w/separate waste pipe, 55# inj, late cam; >red 87 924S - chip, K&N, punched-out cat&muffler >black 80 924 - (sold) >maroon 77 924 - auto (sold) |
||
|
03-07-2010, 05:56 AM
|
|
|
Registered
|
Yep. Both of them. Shorn clean off and had probably been that way for some time. They were completely dry, no oil left what so ever. Funny thing is I did not really notice it when driving or idling. The shaking was not bad at all. I assumed it was due to the lower compression of the turbo engine and a requirement of higher revs... I can't imagine how smooth it will be with the new mounts.
__________________
1990 944 T: 100 000 km/63K miles, 1997 986 2.5L: 95 000 km/60K miles, Living in the trackless land of plenty! Last edited by bebbetufs; 03-07-2010 at 07:52 AM.. |
||
|
03-07-2010, 06:42 AM
|
|
|
All Spooled Up
Join Date: May 2009
Location: Between NE and Central PA
Posts: 2,516
|
You know, I was attributing it the lower compression of the turbo engine too. But also the different intake runner geometry. With your response, as well an nize's, I've now put those thoughts to rest.
__________________
>gray 89 951S - K27/8, MAF, 3" intake, 3" exhaust w/separate waste pipe, 55# inj, late cam; >red 87 924S - chip, K&N, punched-out cat&muffler >black 80 924 - (sold) >maroon 77 924 - auto (sold) |
||
|
03-07-2010, 06:57 AM
|
|
|
Az 944 Spec Director
Join Date: Feb 2010
Location: Phx, Az
Posts: 84
|
I don't give it much throttle below 2000 rpm. The bigger problem is that car dis dog slow will that little rpm. I try to never go WOT below 2500 rpm. Seems like a waste.
Now my 8.0L V10 gas tow vehicle tows at 1600 rpm.
__________________
Joe P. 88 944 Turbo S - 100% Stock 84 - 944 Spec #94 Red/White Arizona Region 944Spec Director Az 944 Spec Champion 02/03, 2006 - 2nd Az Region 944 Spec 03,04,08,09 4th - 2009 NASA Natls - Fastest 944 spec lap at Miller Natls - 2.19.282 (Sat Warm-up) |
||
|
03-08-2010, 09:55 AM
|
|
