I've decided to build my DB9 to surpass both the DBS and Vantage in Performance and Horsepower. I resolved the suspension issues in the stock setup with an adjustable damper that surpasses even the DBS in adjustability. The car is stable in any scenario now and did well at Willow Springs with the factory wheels. For more grip and to reduce unsprung weight I needed an extremely lightweight setup so I decided to have Forgeline build me the widest and lightest forged 3-Piece wheels they have ever built for a DB9. 20x12 Rears under 28 lbs, they told me it couldn't be done, I measured and calculated for weeks. It can be done, build em!! I ordered several tires sizes and brands, the Michelin's always came out on top, believe it or not the Pirelli PZero 345's have less useable tread than a Michelin PS4S 325. 12.2 vs 11.9 which makes no sense, but it's true.

Any advice on how to make this a better build is appreciated, please fire away. Cheers!

Current Upgrades
-GT4 108MM Apex'i Air Filters, Highest flowing ever tested
-Porterfield R4-S Pads
-Motul RBF 660 DOT 5.1
-MCS Suspension, a quadruple-adjustable damper 18 clicks of high speed compression, 10 clicks of low speed compression, 18 clicks of high speed rebound, and 10 clicks of low speed rebound adjustment
-Velocity AP Upgrades
-200 Cell Sports Catalysts
-Performance Equal Length 6-2-1 Exhaust Manifolds/Headers
-High Flow Motorsport Air Filters
-Performance ECU Tune
-O2 Sensor Harness Extensions
-Stainless X-Pipe Center Section
-Stainless X-Piper Exhaust/Muffler SuperSport Sound Level
-Forgeline 3-Piece Forged Wheels
-20x9.5 Fronts with 265 Michelin Pilot Sport 4S Tires for Street/Sport Cup2's for Track
-20x12 Rears with 345/25-20 Pirelli PZero's or Michelin Pilot Sport 4S 325/25-20 or Sport Cup2's

 

Amazing build so far. Congrats.
what year is your db9?
what is the offset on your front wheel?
any rubbing on the inside strut front or rear?
what is the alignment settings?

 

Nice to meet a kindred soul...
Pauter chromoly rods with race bearings on a balanced and nitride hardened crankshaft will allow all the power you want.
A lightweight flywheel into a performance clutch will allow your new wheels and suspension to launch.
Racing seats will keep you bruise free after tracking.
Two sets of tires/wheels is also nice, one Michelin PS4S for the street, one Toyo Proxy for the track.

 

Are you upgrading brakes?

 

If you want to match the DBS for power you need to replace your long runner inlet manifolds to the short ones. This makes a huge increase in performance and can be matched to ported throttle bodies. You may also need to go for 400mm discs up front and 380mm on the rear to outperform the DBS Carbon Ceramics.

 

Nice build! Would like to hear how this sounds with the “double” x pipe!

 

Thank you, I'm really happy with it. 2008. Front's are 20x9.5 +50
The rear's have plenty of space with the car lowered 2 inches, with the rear fully decompressed on stands, I have 1mm of clearance between the rim lip and the rear spring.
Rear is 2.2 Negative Camber, Front is set to 2.5 Negative camber, Toe In -.25 Fr, -.07 Rear, Caster is Neutral, Car is more stable at 1.5-2g's than any car I've ever driven with this configuration

Nice to meet you as well. Im considering some serious upgrades to the engine, I want to keep it all motor and built to 750hp just like the One-77 so I will need forged internals, reworked intake/exhaust, and conversion to Manual, keep an eye out for wrecked DBS's for me lol, also I was thinking a nice F1 style sequential setup would be ideal, just like the DBR9, that would be perfect.
As for seats that's a tough one, I'm incredibly picky but I'm running some Sparo R333's now in the Saleen XP8 and they are incredible, however I would need something even better for the Aston. Any ideas?

Yes, I'm considering my options now, CC brakes would be ideal.

Sounds good. Would the DBS Intake Manifold bolt right up?

It sounds like an F1 car, I will post a nice Video Asap.
I also have one of my Racing a Yamaha R1 to 200mph that I will post.

Thanks for all the nice replys! These Forgeline's are so light and incredible!
Will post more pics and videos shortly!

 

I vaguely recall reading how the DBS intake manifold was designed to show a higher peak HP number but it will be lower on torque compared to the DB9. Does anyone have dyno charts of a 2009 DB9 vs 2009 DBS?

And in terms of the engine assembly, is that the only difference between the two? The rest is software I'm assuming.

 

engines tuned for racing often sacrifice a flat torque curve and long-term reliability for peak horsepower where driving a car for a relatively extended period time (15min to 24hrs) within a narrow torque/RPM range can be an acceptable trade-off for a race win.

 

 

Weight is your enemy.

 

Wow this is a bigger difference than I thought. This is even with the older 450hp pre 2009 DB9 here and its got much better torque all throughout the curve compared to a 510hp 2009 DBS. Must feel like a faster car on the street. I wonder how the more powerful 2009 DB9 does.

 

Stock 2005 DB9 with foam type air filters in stock air boxes,fuse 22 out, AC off etc.0W40 oil + ZX1..........



Stock DB9 with secondary cats removed..........



DB9 with ported throttle bodies, DBS intake manifolds and remap to suit...........



Exactly the same dyno and conditions but they got themselves a new printer!

Same as above but now with primary cats removed, 200 cell secondaries and 12 branch tubular manifolds, wrapped in DEI heat insulation.Remapped again to suit.......

WATCH THIS SPACE.

NOTE, these are my dyno results and I have nothing to sell!! Beware of tuners claims when they have product and services to sell or an axe to grind.










Apart from a couple of ports to blank off on the breather system, it is a straight swap.

8Tech.

 

There is such a massive loss in torque everywhere with these DBS manifolds. This is so shocking to me. I had no idea. I don't get why anyone would use them. Do people really stay above 6000rpm?

If the hand drawn "Bamford Rose" dyno graph posted above comparing a stock 450hp DB9 vs a stock 510hp DBS is correct, the DB9 has anything between 20-60 N.m (15-44 lb.ft) more torque from 2000rpm to 5500rpm compared to the DBS. Thats where you do most of your driving. And even on the highway, 6th gear at 80mph is 3000rpm in these cars, so one would have to drop down to 3rd in a 510hp DBS to get the same torque as a 450hp DB9 in 6th gear. That's embarrassing. I guess all the gear shifting in the DBS makes for more entertaining James Bond films.

 

With regard to the one of the above graphs...the simplified relationship between HP and Torque ...HP=(TxRPM)/5252....I would be suspect of the data when the curves don't cross at 5252RPM.
Thanks,
JH