Aston Martin DB7, DB9, DBS, Vantage V8, Vanquish, and Classic models

Supercharger going on...car back next week

Thread Tools
 
Search this Thread
 
Rate Thread
 
  #91  
Old 04-02-2010 | 04:37 PM
Tahoe M3's Avatar
Thread Starter
|
Registered User
Joined: Sep 2005
Posts: 849
From: South Florida
Rep Power: 57
Tahoe M3 is just really niceTahoe M3 is just really niceTahoe M3 is just really niceTahoe M3 is just really niceTahoe M3 is just really nice
Originally Posted by germeezy1
I think he may have some basis in fact, either the V8 Vantages weigh more than claimed, or they are not putting out 380 hp. The only other thing I can think of is the gearing and not having a lot of torque under the curve to get the heavy cars moving. A modern manual car, should not have more than 20% drivetrain losses. But again the only way to find the truth is on an engine dyno.

The early Maserati QP's ran 5.3 to 60 and 13.7 @ 104 in the 1/4 mile with 394 hp and 333 lb ft in a car weighing 4400 lbs.....

So 14 hp and 31 lb ft make up for an almost 900 lb difference? 11.3 lb/ hp for the QP vs 9.1 lb/ hp for the V8 Vantage. Something is not adding up here, it can't just be the 5,000 rpm torque peak that is responsible.
I agree 100%.
 
  #92  
Old 04-02-2010 | 06:34 PM
Stuart Dickinson's Avatar
Former Vendor
Joined: Feb 2009
Posts: 757
Rep Power: 0
Stuart Dickinson Is a GOD !Stuart Dickinson Is a GOD !Stuart Dickinson Is a GOD !Stuart Dickinson Is a GOD !Stuart Dickinson Is a GOD !Stuart Dickinson Is a GOD !Stuart Dickinson Is a GOD !Stuart Dickinson Is a GOD !Stuart Dickinson Is a GOD !Stuart Dickinson Is a GOD !Stuart Dickinson Is a GOD !
Originally Posted by germeezy1
I would think 20% is more in line with a SS car and 15% with a manual.
They should be pretty close to one another - remember that the SS is not an automatic in the true sense of the word (no torque converter) but actually shares virtually all the same physical components as the manual. SS is basically an electronically operated manual.
 
  #93  
Old 04-02-2010 | 06:41 PM
Stuart Dickinson's Avatar
Former Vendor
Joined: Feb 2009
Posts: 757
Rep Power: 0
Stuart Dickinson Is a GOD !Stuart Dickinson Is a GOD !Stuart Dickinson Is a GOD !Stuart Dickinson Is a GOD !Stuart Dickinson Is a GOD !Stuart Dickinson Is a GOD !Stuart Dickinson Is a GOD !Stuart Dickinson Is a GOD !Stuart Dickinson Is a GOD !Stuart Dickinson Is a GOD !Stuart Dickinson Is a GOD !
Originally Posted by germeezy1
I think he may have some basis in fact, either the V8 Vantages weigh more than claimed, or they are not putting out 380 hp. The only other thing I can think of is the gearing and not having a lot of torque under the curve to get the heavy cars moving. A modern manual car, should not have more than 20% drivetrain losses. But again the only way to find the truth is on an engine dyno.

The early Maserati QP's ran 5.3 to 60 and 13.7 @ 104 in the 1/4 mile with 394 hp and 333 lb ft in a car weighing 4400 lbs.....

So 14 hp and 31 lb ft make up for an almost 900 lb difference? 11.3 lb/ hp for the QP vs 9.1 lb/ hp for the V8 Vantage. Something is not adding up here, it can't just be the 5,000 rpm torque peak that is responsible.
One thing I have seen is a number of dyno results on stock 4.3's from a rolling road in Surrey, in England. Not a company that has ever done business with us so never seen any of our mods. This is known for being a very accurate and well-calibrated dyno and came up with the 'right' figures for other cars on the same day. Most of the runs on the 4.3's were turning up numbers arond 368-370.

Yes, obviously there's correction factors, it's not WHP etc. etc. but my impression is that the 4.3 is a touch underpowered (but not much.)
 
  #94  
Old 04-02-2010 | 07:29 PM
germeezy1's Avatar
Registered User
Joined: Feb 2009
Posts: 2,571
From: Kirkland
Rep Power: 177
germeezy1 Is a GOD !germeezy1 Is a GOD !germeezy1 Is a GOD !germeezy1 Is a GOD !germeezy1 Is a GOD !germeezy1 Is a GOD !germeezy1 Is a GOD !germeezy1 Is a GOD !germeezy1 Is a GOD !germeezy1 Is a GOD !germeezy1 Is a GOD !
Originally Posted by Stuart@RSC
They should be pretty close to one another - remember that the SS is not an automatic in the true sense of the word (no torque converter) but actually shares virtually all the same physical components as the manual. SS is basically an electronically operated manual.
You are correct, I had the DB9 Sportshift in mind.
 
  #95  
Old 04-02-2010 | 09:38 PM
XJRS Owner's Avatar
Registered User
Joined: Jun 2009
Posts: 2,135
From: Northern CT
Rep Power: 141
XJRS Owner Is a GOD !XJRS Owner Is a GOD !XJRS Owner Is a GOD !XJRS Owner Is a GOD !XJRS Owner Is a GOD !XJRS Owner Is a GOD !XJRS Owner Is a GOD !XJRS Owner Is a GOD !XJRS Owner Is a GOD !XJRS Owner Is a GOD !XJRS Owner Is a GOD !
Originally Posted by germeezy1
You are correct, I had the DB9 Sportshift in mind.
What the heck are you talking about ?!?!?!

DB9s are manual or automatic (with a torque converter). You are badly misinformed if you think the auto trans in a DB9 is anything other than a conventional auto trans.
 
  #96  
Old 04-02-2010 | 09:51 PM
germeezy1's Avatar
Registered User
Joined: Feb 2009
Posts: 2,571
From: Kirkland
Rep Power: 177
germeezy1 Is a GOD !germeezy1 Is a GOD !germeezy1 Is a GOD !germeezy1 Is a GOD !germeezy1 Is a GOD !germeezy1 Is a GOD !germeezy1 Is a GOD !germeezy1 Is a GOD !germeezy1 Is a GOD !germeezy1 Is a GOD !germeezy1 Is a GOD !
I meant the DB9 Touchtronic, I am aware that the Sportshift is an automated manual and the Touchtronic a 6 speed ZF Auto. Sorry its been a long day!
 
  #97  
Old 04-14-2010 | 03:52 PM
echo220's Avatar
Registered User
Joined: Apr 2010
Posts: 141
From: Vancouver, B.C.
Rep Power: 20
echo220 is infamous around these parts
Hi Tahoe M3, I'm in the midst of ordering a new set of wheels for my 09 Roadster. I saw that you went with 19X9 and 19X11's. Just wondering why you didn't go up to 20X9 and 20X11's instead ? Thanks,
 
  #98  
Old 04-16-2010 | 02:00 PM
Tahoe M3's Avatar
Thread Starter
|
Registered User
Joined: Sep 2005
Posts: 849
From: South Florida
Rep Power: 57
Tahoe M3 is just really niceTahoe M3 is just really niceTahoe M3 is just really niceTahoe M3 is just really niceTahoe M3 is just really nice
Originally Posted by echo220
Hi Tahoe M3, I'm in the midst of ordering a new set of wheels for my 09 Roadster. I saw that you went with 19X9 and 19X11's. Just wondering why you didn't go up to 20X9 and 20X11's instead ? Thanks,
in terms of performance, they don't add anything and likely hurt with added weight. There's a reason the race cars use 18s. And as for looks, I think the 20s look too big for the car whereas the 19s are just right. I wouldn't change anything on mine.
 
  #99  
Old 04-17-2010 | 09:51 PM
Fantasma's Avatar
Registered User
Joined: Jun 2007
Posts: 1,129
From: IRVINE, CA
Rep Power: 105
Fantasma Is a GOD !Fantasma Is a GOD !Fantasma Is a GOD !Fantasma Is a GOD !Fantasma Is a GOD !Fantasma Is a GOD !Fantasma Is a GOD !Fantasma Is a GOD !Fantasma Is a GOD !Fantasma Is a GOD !Fantasma Is a GOD !
Any updates on posting your dynos?
 
  #100  
Old 04-18-2010 | 02:46 PM
Tahoe M3's Avatar
Thread Starter
|
Registered User
Joined: Sep 2005
Posts: 849
From: South Florida
Rep Power: 57
Tahoe M3 is just really niceTahoe M3 is just really niceTahoe M3 is just really niceTahoe M3 is just really niceTahoe M3 is just really nice
Here's one brief video...not very good quality that I put together a while back. I'm still working on getting some better videos made and edited. Should have more soon. As you can see traffic really limited what I could do here.

http://www.youtube.com/watch?v=NU95uRe_ta0
 
  #101  
Old 04-18-2010 | 05:47 PM
markesq's Avatar
Registered User
Joined: Jul 2006
Posts: 659
From: Florida
Rep Power: 46
markesq has a spectacular aura aboutmarkesq has a spectacular aura about
For the first 1:10 all I kept wanting to do was turn the camera forward or zoom in on the speedo. lol
 
  #102  
Old 04-18-2010 | 06:31 PM
Tahoe M3's Avatar
Thread Starter
|
Registered User
Joined: Sep 2005
Posts: 849
From: South Florida
Rep Power: 57
Tahoe M3 is just really niceTahoe M3 is just really niceTahoe M3 is just really niceTahoe M3 is just really niceTahoe M3 is just really nice
Well you can get a good idea based on the known speeds at the top of each gear.
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
tkebp1275
Automobiles For Sale
7
08-31-2015 06:35 PM
mlife2878
996 Turbo / GT2
6
08-26-2015 07:02 PM



You have already rated this thread Rating: Thread Rating: 0 votes,  average.

Quick Reply: Supercharger going on...car back next week



All times are GMT -6. The time now is 10:39 PM.