ACT Superflare trumpets
Discussion
Hi Guys,
Does anyone have ACT Superflare trumpets fitted? Can anyone comment on whether you could feel a real difference afterwards (in power or torque rather than noise). I have a 430 I'm thinking about fitting them to. They look good value if they can deliver.
For £200 ACT claim "most applications will achieve around 10 bhp, with increased torque everywhere"
I guess flaring the trumpets and rolling the tops makes sense to give a bit more power but shouldn't shortening the inlet track mean the peak power/torque are pushed up the rev range? It seems like this design might be good for a high-revving powerful race engine but not so good for a torquey low revving road car.
I wait to be corrected.
Cheers,
Simon
Does anyone have ACT Superflare trumpets fitted? Can anyone comment on whether you could feel a real difference afterwards (in power or torque rather than noise). I have a 430 I'm thinking about fitting them to. They look good value if they can deliver.
For £200 ACT claim "most applications will achieve around 10 bhp, with increased torque everywhere"
I guess flaring the trumpets and rolling the tops makes sense to give a bit more power but shouldn't shortening the inlet track mean the peak power/torque are pushed up the rev range? It seems like this design might be good for a high-revving powerful race engine but not so good for a torquey low revving road car.
I wait to be corrected.
Cheers,
Simon
Get rid of the lot ,If you want more air go for the below.
72mm Plenum
45mm Trumpet base with 45mm short flared aluminum trumpets or 45mm ACT carbon trumpets.
Port matched inlet manifold
£450
Then the ACT induction kit
K&N airfilter
Smooth bore elbow..
not sure of the cost.
72mm Plenum
45mm Trumpet base with 45mm short flared aluminum trumpets or 45mm ACT carbon trumpets.
Port matched inlet manifold
£450
Then the ACT induction kit
K&N airfilter
Smooth bore elbow..
not sure of the cost.
Edited by SILICONEKID340HP on Monday 16th January 19:56
Edited by SILICONEKID340HP on Monday 16th January 19:57
Edited by SILICONEKID340HP on Monday 16th January 19:59
SILICONEKID340HP said:
Get rid of the lot ,If you want more air go for the below.
72mm Plenum
45mm Trumpet base with 45mm short flared aluminum trumpets or 45mm ACT carbon trumpets.
Port matched inlet manifold
£450
No it won't. The 72 mm plenum on its own won't do much, the 45 mm ported intake manifold and trumpet base make a negligible difference on a 500 which is already ported and taken out to 44 mm on the trumpet base side and will only serve to lower gas speeds on a 4 litre - which leaves the trumpets... 72mm Plenum
45mm Trumpet base with 45mm short flared aluminum trumpets or 45mm ACT carbon trumpets.
Port matched inlet manifold
£450
The difference between the carbon superflare trumpets and what's in there is not in the length - indeed you can 'tune' trumpet lengths to give either more low/midrange torque or top end although the effects are minor unless the trumpet bellmouths are too close to the plenum roof - but, as the name already implies, in their shape. Simply put, they are shaped to maximise the airflow through the holes you have underneath by way of the taper and the flares - something you can't really do in this way with steel or spun alloy trumpets.
gizzer said:
My 4.3 with smooth bore ,, k&n filter plus ali mod,s to reduce heat sink
HAPPY DAY,S MADE SO MUCH BETTER TO DRIVE
Gizzer, have you just added the flared trumpets (38mm) or have you gone for the full 45mm system? Can you say in which areas of driving you have noticed most improvement?HAPPY DAY,S MADE SO MUCH BETTER TO DRIVE
900T-R said:
No it won't. The 72 mm plenum on its own won't do much, the 45 mm ported intake manifold and trumpet base make a negligible difference on a 500 which is already ported and taken out to 44 mm on the trumpet base side and will only serve to lower gas speeds on a 4 litre - which leaves the trumpets...
I can see why you say going from 44mm to 45mm on a 500 might make little difference but on a 430 the standard pipes are 38mm in diameter. Why would lowering the gas speed be a bad thing?
There's an ideal range for gas speeds - too high indicates you're running out of airflow and too low makes it difficult to get the right mixture without fuel droplets, er, 'dropping out' at low-to-middling loads and speeds.
On a 430 and 450 I'd say either way (38 mm superflares or upsizing to 45 mm) is viable depending on other mods (mine is running with the big carbon trumpets under a twin throttle carbon plenum with a ruddy big ex-BMW V8 air mass meter - I might not have chosen this route had I known I still have standard sized intake valves on my rebuilt/u[pgraded engine but there you go), IMHO for a 400 the 45 mm holes won't do anything but lower midrange torque unless it's massively tuned.
On a 430 and 450 I'd say either way (38 mm superflares or upsizing to 45 mm) is viable depending on other mods (mine is running with the big carbon trumpets under a twin throttle carbon plenum with a ruddy big ex-BMW V8 air mass meter - I might not have chosen this route had I known I still have standard sized intake valves on my rebuilt/u[pgraded engine but there you go), IMHO for a 400 the 45 mm holes won't do anything but lower midrange torque unless it's massively tuned.
900T-R said:
SILICONEKID340HP said:
Get rid of the lot ,If you want more air go for the below.
72mm Plenum
45mm Trumpet base with 45mm short flared aluminum trumpets or 45mm ACT carbon trumpets.
Port matched inlet manifold
£450
No it won't. The 72 mm plenum on its own won't do much, the 45 mm ported intake manifold and trumpet base make a negligible difference on a 500 which is already ported and taken out to 44 mm on the trumpet base side and will only serve to lower gas speeds on a 4 litre - which leaves the trumpets... 72mm Plenum
45mm Trumpet base with 45mm short flared aluminum trumpets or 45mm ACT carbon trumpets.
Port matched inlet manifold
£450
The difference between the carbon superflare trumpets and what's in there is not in the length - indeed you can 'tune' trumpet lengths to give either more low/midrange torque or top end although the effects are minor unless the trumpet bellmouths are too close to the plenum roof - but, as the name already implies, in their shape. Simply put, they are shaped to maximise the airflow through the holes you have underneath by way of the taper and the flares - something you can't really do in this way with steel or spun alloy trumpets.
looking at the carbon trupets they look very long ,do you need the torque in these cars.
I thought the very short wide aluminum ones would be more suited for more bhp.
Edited by SILICONEKID340HP on Tuesday 17th January 20:07
Edited by SILICONEKID340HP on Wednesday 18th January 22:51
SILICONEKID340HP said:
His is a 4.3 not 4l
looking at the carbon trupets they look very long ,do you need the torque in these cars.
I thought the very short wide aluminum ones would be more suited for more bhp.
You can't argue with results though - plenty of before/after printouts available on anything from 4-4.6 litre showing a consistent 10-15 lbs/ft over most of the rev range and ~10 bhp at the top end, by just changing the trumpet base for one with the carbon superflares. And unlike swapping intake manifolds which involves removing the fuel rail and replacing the valley gasket (TVR garages will quote you 4-5 hrs labour for that), removing/installing the trumpet base is something just about anyone can do at home with no risk of effing up stuff.looking at the carbon trupets they look very long ,do you need the torque in these cars.
I thought the very short wide aluminum ones would be more suited for more bhp.
For less than £300 and a simple DIY parts swap, there's very little to argue with the carbon trumpets/smooth bore intake hose/ trumpet base thermal gasket combo. It's the simplest and cheapest power you will ever find on a 3.9-4.6 litre RV8 (assuming everything is well on your engine).
Results from my 500 growl rolling road gave 269bhp and 320 torque in 2009 standard car.
Winter I fitted ACT carbon trumpets, smoothbore induction kit, magnacore leads no other modifications just the yearly service
Next growl 285bhp and 342 torque. Now I do have a small issue that the car is running a little lean at top end but nothing major and certainly within an acceptable tolerance, but just shows that there is still more power available if needed.
These are just my results and experiences but in my opinion great value for money and does exactly what it should
Chris
Winter I fitted ACT carbon trumpets, smoothbore induction kit, magnacore leads no other modifications just the yearly service
Next growl 285bhp and 342 torque. Now I do have a small issue that the car is running a little lean at top end but nothing major and certainly within an acceptable tolerance, but just shows that there is still more power available if needed.
These are just my results and experiences but in my opinion great value for money and does exactly what it should
Chris
chris52 said:
Results from my 500 growl rolling road gave 269bhp and 320 torque in 2009 standard car.
Winter I fitted ACT carbon trumpets, smoothbore induction kit, magnacore leads no other modifications just the yearly service
Next growl 285bhp and 342 torque. Now I do have a small issue that the car is running a little lean at top end but nothing major and certainly within an acceptable tolerance, but just shows that there is still more power available if needed.
These are just my results and experiences but in my opinion great value for money and does exactly what it should
Chris
Winter I fitted ACT carbon trumpets, smoothbore induction kit, magnacore leads no other modifications just the yearly service
Next growl 285bhp and 342 torque. Now I do have a small issue that the car is running a little lean at top end but nothing major and certainly within an acceptable tolerance, but just shows that there is still more power available if needed.
These are just my results and experiences but in my opinion great value for money and does exactly what it should
Chris
Well my 5l has 340hp with the V8D short flared aluminum trumpets ,don`t think TVR power use trumpets at all ,just a blended base..
Look under induction
http://www.v8developments.co.uk/
You can get them in both sizes
Nothing wrong with the carbon one`s, i had a set in my 4l just thought it would be worth showing different options.
These come complete so there is no gluing just bolt on ,i used a thin cheap thermal insulater from TVRPower and makes a good gasket so no silicone needed
Edited by SILICONEKID340HP on Wednesday 18th January 10:32
Edited by SILICONEKID340HP on Wednesday 18th January 22:52
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