Radical cold air feed

[CJ]

Not sure I'd be too happy butchering the bonnet like that but I'm sure its an effective means of getting colder air into the throttle body:

http://www.ftooc.org/phpbb/viewtopic.php?t=14726

CJ

[Myfeckin FTO]

I like it!

I have thought about doing something similar - but it would have to look better than a hole cut in the bonnet - at the very least a more isometrical cut-out with some mesh to stop any muck/rain getting in. Problem is I would guess the understructure of the FTO bonnet would interfere with getting the ideal balance between cosmetic and functional.

It gets very hot under the bonnet - I have the ITG filter but I'm not convinced of the 8.5BHP claim - especially when its pulling in a lot of hot air from the engine - I think this mod would help a lot with the after market filters.

So - does anyone know someone who could do a tasteful cutout and be able to attach a more attractive vent & mesh than simply taking a hacksaw/grinder to the bonnet?

[CJ]

I like it!

I have thought about doing something similar

Talk to Karl from splitrimsracing.com, he was in the process of developing a bonnet vent the last time we spoke.
As it happens, I'm in the process of putting together a DIY cold air induction kit for use with the ITG, when it will be finished is anyones guess so watch this space.

CJ

[CJ]

It gets very hot under the bonnet - I have the ITG filter but I'm not convinced of the 8.5BHP claim - especially when its pulling in a lot of hot air from the engine?

Forgot to mention, 8.5bhp is way above the mark, Daz clocked 1bhp difference on a rolling road with a K&N cone filter over the stock airbox! In saying that, I reckon it would have been complimented by a freer flowing aftermarket exhaust.

With the heat from Tip box and engine I would say I'm loosing power over the stock air filter. I have a CAI pipe feeding up from the front grill to the area around the ITG but unless I can direct it properly in terms of an enclosure I would reckon the gains are minimal.

CJ

[Daz]

Forgot to mention, 8.5bhp is way above the mark, Daz clocked 1bhp difference on a rolling road with a K&N cone filter over the stock airbox! In saying that, I reckon it would have been complimented by a freer flowing aftermarket exhaust.



CJ

Thats true But don't forget it was the standard filter which was the better of the two just that the k&n sounded better it was a surprise that i droped power with the k&n but then again it also droped power when the racelogic chip was added aswell.

Daz...

[Myfeckin FTO]

It gets very hot under the bonnet - I have the ITG filter but I'm not convinced of the 8.5BHP claim - especially when its pulling in a lot of hot air from the engine?

Forgot to mention, 8.5bhp is way above the mark, Daz clocked 1bhp difference on a rolling road with a K&N cone filter over the stock airbox! In saying that, I reckon it would have been complimented by a freer flowing aftermarket exhaust.


CJ

Well - it looked like a pretty comprehensive test that the UK guys did on all the air filters - hence my decision to go ITG - and it does sound way better esp with the RSR exhaust (got from Steelroe-soon to be de-catted).
The only way to find out is to put it on a rolling road - this I will do in the next few weeks - also stuck in Denso Iridium plugs - all in the space of a couple of weeks so I did feel a good difference in response and performance overall - though if I'm pushing anything like 200BHP I'd be very happy (obviously less at the wheels - 185BHP hopefully!!)

[CJ]

Well - it looked like a pretty comprehensive test that the UK guys did on all the air filters - hence my decision to go ITG - and it does sound way better esp with the RSR exhaust (got from Steelroe-soon to be de-catted).

Yeah, I don't dispute these claims, but unless you're getting plenty of cold oxygen rich air into the engine bay during normal driving conditions you're not going to see any serious gains. On that note, can anyone recommend a thermometer that would fit under the engine bay without melting?! I believe that the temperature under a V6 engined Tip bonnet can reach 70 deg C

I'd be interested to see what figures you get on the RR with and without the ITG. Decatting makes a big difference to the exhaust note and the free-er flowing exhaust should help somewhat.

CJ

[CJ]

Thats true But don't forget it was the standard filter which was the better of the two just that the k&n sounded better

So it was, got my wires crossed there!

it was a surprise that i droped power with the k&n but then again it also droped power when the racelogic chip was added aswell.

I think we know from experience that the Racelogic VSAM was a bit of a non-starter in BHP gain terms, the same drop in performance was noticed on my GPX over a year previously. As regards the filter, I think if I were to go down that road again, I'd just get a K&N panel filter and reroute the original airbox feed from the wheel arch to the front grill. I know you're loosing out on induction noise but at I'd rather have the extra power @ 6000+ rpm! (high RPM is where you notice the gains from a free flowing filter).

CJ