What did you pay for these upgrades?

 

If I can get a hold of a willing owner in Miami who's up for the before/after I would definitely be up for it!

 

9 mph trap speed is going to be hard to pick up with just 50 hp, so I personally think the 4.7 either has considerably more power under the curve or is underrated at 420 hp. Especially if the 4.7 convertible shows a 9 mph trap speed increase over a 4.3 coupe.

 

I have a 4.3 with N400 intake upgrade, K&N filtersl and tubi exhaust .
I paid close to $9,000 with the anual service.

 

I was surprised as well, but this came from a pretty reliable source. Dr. Kaminsky has probably done as many laps of Mid-Ohio as anybody out there so he's pretty consistent, and he came back to me with those results of his own accord so I'm pretty willing to accept the increase at face value. But yes, you're right, 9mph is a big increase in trap speed.

 

Thanks Stu for your response.

I have been extremely please with my vantage since installing your mods. And I have to say that I think that your ECU map is more agressive than the N400 ECU that I had in the car before. Post installing your ECU remap, my car really responded and accelerated faster than with just the N400 kit. And although I have no dyno numbers to substantiate, the addition of the 200 cell cats was an additional hp increase as well. Even if the 4.7 has better mid range (which makes sense), it is not worth it to me. The performance gains of the 4.7 over the modded 4.3, seem minimal at best.

Jeff

 

Drop me a line when you're ready for some carbon!

 

Motor Trend (February 2009, Glass Half Empty?) 4.7 was clocked: 0-60 mph in 4.1 seconds, 1/4 mile @ 12.5 seconds at 115 mph in a manual tranny. That's moving about the same as DBS! You can check atricle online for free. The 4.7 is fast...period.

 

So either the 4.3 isn't putting out 380 hp or the 4.7 is putting out more than 420 hp. Honestly though I think its the power under the curve, the 4.3 just doesn't have much under 5,000 rpm. Because 115 mph is flat moving and 4.1 0-60 puts it right up against the V12 DBS and only 4 tenths behind the V12 Vantage.

 

Quote from MT article:
Nonetheless, on its first run the Aston had clocked a 0-to-60-mph time of 4.1 seconds and a quarter mile of 12.5 seconds at 115.0 mph, easily bettering the 4.3-liter car's performance (5.2 seconds; 13.6 seconds at 105.8 mph) and even topping the times of the mighty, 520-horse DBS with six-speed automatic (4.2 seconds to 60 mph; 12.6 seconds at 112.3 mph in the quarter). And the Vantage hadn't even revealed its full potential. "Definitely could've gone quicker," said test driver Scott Mortara. "Probably under four seconds to 60."


Read more: http://www.motortrend.com/roadtests/coupes/112_0904_2009_aston_martin_v8_vantage_test/sports_pack_performance.html#ixzz0jflXqAX2

Back to my original question, can a modified 4.3 do this? If so, then I modify. The 4.7s I think are going to get more rare...I should have never driven the %^# thing.

 

Easy answer, no the 4.3 would take forced induction for it to equal the powerband and / or power of the 4.7 and run anywhere close to that kind of times or trap speed in the 1/4 mile. 9-11 mph trap speed difference takes a whole lot of power to make up for!

 

Don't put too much stock in magazine test articles. I have seen ones for the 4.3 that range from 4.5-5.2 for 0-60 times. Some times they don't test the cars and just go with the manufacturer numbers.

Next time I go for service I am definitely testing a 4.7. May have to upgrade next year to a 2009.

 

This was from another MT article on the 2009 Aston. Combined with the V8 Vantage's increased power, acceleration from 0 to 60 mph is down to a paltry 4.7 sec, while top speed is up to 180 mph.

 

I can't find any other article that duplicates those 0-60 and 1/4 times from that Motor Trend one. They all say 0-60 is 4.7, even another Motor Trend article. That had to be a misprint.

 

Which is why I am quoting trap speed, trap speed differences take a lot of the driver variances out of the equation. Even the difference between 104 mph and 113 mph is huge let alone between 104 mph and 115 mph.