cheaper performance upgrade alternative to BR??
Discussion
gibbon said:
yeti said:
It's no secret (obviouly) that my car was/is the development car for the Bamford Rose V12 manifold system. Being a wobbly old hector of an early DB9 Volante it also gave them the opportunity to see how far the chassis could be brought along (it now exceeds DBSV levels of rigidity) and how the switchable suspension system (which was again, in development at the time) could be utilised.
Levels of rigidity? In terms of what? Are you talking about the torsional stiffness of the chassis or simple spring rate and damping of the suspension? Be careful you dont confuse chassis 'rigidity' and suspension spring rates.
yeti said:
No, I'm talking about the addition of the shear plates, so yes, tornsional rigidity. There are various types including the DBS Volante ones; BR chose to use the ones from the Virage Volante instead as they were the state of the art at the time. This meant they had to extensively re-engineer the rear subframe of my car to make sure than every single mounting and stiffening point matched up so that a latest generation shear plate could be used. A LOT of work, but oh; so, so worth it
Wow, impressive stuff. 
I started the thread because I came across RSC cats + manifold which totalled around 2.4k on the Topgear website. I suggested that based on my research, these items gave the biggest bhp increases , thus this could be a cheaper alternative to going for BR's full package that also incl the sports exhaust and filters.
I had not spoken to anyone at this stage. Later that day I called steve at topgear who told me those items were no longer in stock and that he and stuart were close to completing new manifolds that they had developed. Stuart is an aston tuning expert who had been in charge of development and manufacture of all RSC's aston tuning products. I sensed at this stage that these guys were obviously experts in this field and would produce an excellent product thus I suggested they give me a good price for the full exhaust package and in exchange for a decent discount I would post the results on pistonheads. In fact it was me who suggested and pushed for a before and after dyno as I knew how demanding the aston forum guys can be.
Anyway im really excited about this project and as I said before I will defitely come back and provide detailed info on how it went.
Hope that clears things up. If anyone still has doubts they can pm me.
I had not spoken to anyone at this stage. Later that day I called steve at topgear who told me those items were no longer in stock and that he and stuart were close to completing new manifolds that they had developed. Stuart is an aston tuning expert who had been in charge of development and manufacture of all RSC's aston tuning products. I sensed at this stage that these guys were obviously experts in this field and would produce an excellent product thus I suggested they give me a good price for the full exhaust package and in exchange for a decent discount I would post the results on pistonheads. In fact it was me who suggested and pushed for a before and after dyno as I knew how demanding the aston forum guys can be.
Anyway im really excited about this project and as I said before I will defitely come back and provide detailed info on how it went.
Hope that clears things up. If anyone still has doubts they can pm me.
if you really want to do cheap then you should be able to pick up the cat cells for a few hundred quid each, then just get them welded into the flanges by the local barryboy custom exhaust place
no-one sees these things anyway so why does it matter how shiny they are? £500 each should do it ...you can get a backbox done too at the same time for under £500 notes, so long as you keep the OE end tips, no-one will notice and it will no doubt sound louder and give the perceived effect
/lets not overcomplicate things here
no-one sees these things anyway so why does it matter how shiny they are? £500 each should do it ...you can get a backbox done too at the same time for under £500 notes, so long as you keep the OE end tips, no-one will notice and it will no doubt sound louder and give the perceived effect
/lets not overcomplicate things here
scotpak said:
I started the thread because I came across RSC cats + manifold which totalled around 2.4k on the Topgear website. I suggested that based on my research, these items gave the biggest bhp increases , thus this could be a cheaper alternative to going for BR's full package that also incl the sports exhaust and filters.
I had not spoken to anyone at this stage. Later that day I called steve at topgear who told me those items were no longer in stock and that he and stuart were close to completing new manifolds that they had developed. Stuart is an aston tuning expert who had been in charge of development and manufacture of all RSC's aston tuning products. I sensed at this stage that these guys were obviously experts in this field and would produce an excellent product thus I suggested they give me a good price for the full exhaust package and in exchange for a decent discount I would post the results on pistonheads. In fact it was me who suggested and pushed for a before and after dyno as I knew how demanding the aston forum guys can be.
Anyway im really excited about this project and as I said before I will defitely come back and provide detailed info on how it went.
Hope that clears things up. If anyone still has doubts they can pm me.
Sounds good and looking forward to hearing how it all goes. I had not spoken to anyone at this stage. Later that day I called steve at topgear who told me those items were no longer in stock and that he and stuart were close to completing new manifolds that they had developed. Stuart is an aston tuning expert who had been in charge of development and manufacture of all RSC's aston tuning products. I sensed at this stage that these guys were obviously experts in this field and would produce an excellent product thus I suggested they give me a good price for the full exhaust package and in exchange for a decent discount I would post the results on pistonheads. In fact it was me who suggested and pushed for a before and after dyno as I knew how demanding the aston forum guys can be.
Anyway im really excited about this project and as I said before I will defitely come back and provide detailed info on how it went.
Hope that clears things up. If anyone still has doubts they can pm me.
Just wanted to update you guys.
My vantage will be booked in next week for the installation of the cats, filter, manifold and for the ecu remap. As promised I will be providing before and after dynos.
The parts and installation will be through velocity ap (velocityap.com) which is a company
Run by Stuart Dickinson and by Steve Kilcoyne (topgear.co.uk).
Anyway watch this space. Im really looking forward to it!!!
My vantage will be booked in next week for the installation of the cats, filter, manifold and for the ecu remap. As promised I will be providing before and after dynos.
The parts and installation will be through velocity ap (velocityap.com) which is a company
Run by Stuart Dickinson and by Steve Kilcoyne (topgear.co.uk).
Anyway watch this space. Im really looking forward to it!!!
scotpak said:
Just to point out, I have not been promised an exact figure.
I was given as a guide a bhp figure per component. Was also told you cant simply add these figures to get a total.
So lets see what the dynos says before people start proclaimng, "I cant believe they promised that"!!!
Fair enough I was given as a guide a bhp figure per component. Was also told you cant simply add these figures to get a total.
So lets see what the dynos says before people start proclaimng, "I cant believe they promised that"!!!
Let's wait for the dyno, as you say and we can take it from there
Could you also ask the guys to post pre- and post- operation mass airflow data as well please. Stuart will know why!
Edited by yeti on Tuesday 21st May 19:09
scotpak said:
...next week for the installation of the cats, filter, manifold and for the ecu remap.....
.......Was also told you cant simply add these figures to get a total.
Im hoping somewhere in the 50-60 range??? Hopefully more !!!
You can..! Luckily for the BHP output of your car, You have made an incorrect statement here. .......Was also told you cant simply add these figures to get a total.
Im hoping somewhere in the 50-60 range??? Hopefully more !!!
The performance increase from all the non intrusive measures you state are indeed cumulative. The breakdown of manifolds, cats, re-tune and silencer has been done before, this is nothing pioneering and importantly for power, is an answer not hugely sensitive to discreet changes within any of these components' design.
The only point when non intrusive modifications do not return cumulative gains is when other changes are required as an 'enabler' of that performance. For example, there is a figure the 35mm inlet valve fitted to 4.3L V8 won't flow beyond (when air is drawn naturally (so not fI)), the result of this limitation is no matter what happens downstream of that part (exhaust valve, exhaust port, manifolds, catalysts, silencer) there will be no increase in performance even though a product is bolted to the car, but, all the components you state are just within cumulative scope.
This is one reason why factory had to go 36mm inlet Valve for 4.7L and why 4.3L GT4 engines can't really go beyond 420 ish BHP (NA). So in the case of your project because you don't state any intrusive works, cumulative gains are pretty much capped at 420BHP for a 4.3L, again, not pioneering info here, its all been done before.
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