Vanquish manifolds on db9

[crispyj]

Thought I would post a pic off my new manifolds, from a 2012 onwards vanquish. A little bit off work to get them to fit but should hopefully free up a bit of top end power.

db9 2020 by chris jones, on Flickr

[crispyj]

The main issue with fitting these manifolds is the throttle bodies for the vanquish are 6mm larger diameter, hence the fitting holes are wrong, I made up a plate to fit the db9 throttle bodies too.

I gave the car it’s first run tonight, the mod has made a big difference after 5500 rpm, before the car felt as if it was starting to hold back. Now it revs very quickly up to 6800 when I changed gear. It feels if I have lost a little bottom end torque but I was expecting that due to the shorter intakes. I will have to get her on the rolling road at some point.

All In all I’m happy.

[crispyj]

I have smoothed the throttle bodies and smoothed the ports as you did mate. I got the ideas from your post.

[crispyj]

I did think about that but I thought I may need to remap then due to the increase of air flow, also I would need to change the inlet pipes as well.

[crispyj]

Yeh I just thought it was too much hassle to sort throttle bodies, Plus I’m more than happy with the performance gains. So going to stick with what I have done.
The only thing I may do is if I remove the manifolds again, cut of the old throttle body mountings and weld the smaller ones in place.