Thorney Motorsport Custom Remap

[Thorney]

Yeah 20bhp on the website does seem a little generous, I'll change that now, we have seen up to 20bhp on some cars, the CSL and M3 areas are due for a re-write due to the adding of the manifold to the tuning so its just been left I think, sorry. Typically the gains are 10-15bhp but does depend on the car. We dyno the cars as they come in and then write a custom map for the car on the dyno adjusting as necessary for the car so it does depend on the car as it comes in (running on 95 fuel for example will meanless power both before and after) but the gains are quite impressive.

An NA engine like the CSL will never gain huge hp on a simple remap but the power delivery is smoother, torque is increased throughout the rev range and of course the top speed limit is removed (should that be of interest). We would only do this via the dyno, the idea of turning up on someones doorstep to map a £10k engine seems a little risky IMO but there you go. The idea of the pre dyno runs are to ensure the car is running fine, you'd be amazed at how many CSL's come in with problems the owner had no idea were there (flap not working is a good one).

As with all our upgrades you get to try before you buy so if you dont like we just refund you, simple as that, we have a long built reputation on CSL's (as most people here know I run one myself and have done for the alst 3 years) so I'm not about to mess that up with silly claims. The stage 1 is more about fine tuning that bolting on meaninglful power. The stage 2 on the other hand offers far more dramatic power gains and we're about to re-write the website to include the new manifold (now that they have actually arrived at last) which again adds meaningful power gains this will be our new stage 3 and the 4 adds the cams on, all are custom mapped.

[Windowlicker]

Yeah 20bhp on the website does seem a little generous, I'll change that now, we have seen up to 20bhp on some cars, the CSL and M3 areas are due for a re-write due to the adding of the manifold to the tuning so its just been left I think, sorry. Typically the gains are 10-15bhp but does depend on the car. We dyno the cars as they come in and then write a custom map for the car on the dyno adjusting as necessary for the car so it does depend on the car as it comes in (running on 95 fuel for example will meanless power both before and after) but the gains are quite impressive.

An NA engine like the CSL will never gain huge hp on a simple remap but the power delivery is smoother, torque is increased throughout the rev range and of course the top speed limit is removed (should that be of interest). We would only do this via the dyno, the idea of turning up on someones doorstep to map a £10k engine seems a little risky IMO but there you go. The idea of the pre dyno runs are to ensure the car is running fine, you'd be amazed at how many CSL's come in with problems the owner had no idea were there (flap not working is a good one).

As with all our upgrades you get to try before you buy so if you dont like we just refund you, simple as that, we have a long built reputation on CSL's (as most people here know I run one myself and have done for the alst 3 years) so I'm not about to mess that up with silly claims. The stage 1 is more about fine tuning that bolting on meaninglful power. The stage 2 on the other hand offers far more dramatic power gains and we're about to re-write the website to include the new manifold (now that they have actually arrived at last) which again adds meaningful power gains this will be our new stage 3 and the 4 adds the cams on, all are custom mapped.

Fair enough , nice response :smokin: :thumbs:

Off at a slight tangent, other than noise suppression, does the intake flap serve any other purpose, and does removing it have any negative effects at all ??
Many thanks.

[englebert]

A claimed 20bhp is the sort of Max Power marketing spiel that means i would personally never take the plunge. I never trust tuners that give claimed power figures, as its all about enticing the naiive... wave the biggest power figure around, and you get the money.

[SMD]

Yeah 20bhp on the website does seem a little generous, I'll change that now, we have seen up to 20bhp on some cars, the CSL and M3 areas are due for a re-write due to the adding of the manifold to the tuning so its just been left I think, sorry. Typically the gains are 10-15bhp but does depend on the car. We dyno the cars as they come in and then write a custom map for the car on the dyno adjusting as necessary for the car so it does depend on the car as it comes in (running on 95 fuel for example will meanless power both before and after) but the gains are quite impressive.

An NA engine like the CSL will never gain huge hp on a simple remap but the power delivery is smoother, torque is increased throughout the rev range and of course the top speed limit is removed (should that be of interest). We would only do this via the dyno, the idea of turning up on someones doorstep to map a £10k engine seems a little risky IMO but there you go. The idea of the pre dyno runs are to ensure the car is running fine, you'd be amazed at how many CSL's come in with problems the owner had no idea were there (flap not working is a good one).

As with all our upgrades you get to try before you buy so if you dont like we just refund you, simple as that, we have a long built reputation on CSL's (as most people here know I run one myself and have done for the alst 3 years) so I'm not about to mess that up with silly claims. The stage 1 is more about fine tuning that bolting on meaninglful power. The stage 2 on the other hand offers far more dramatic power gains and we're about to re-write the website to include the new manifold (now that they have actually arrived at last) which again adds meaningful power gains this will be our new stage 3 and the 4 adds the cams on, all are custom mapped.

Fair enough , nice response :smokin: :thumbs:

Off at a slight tangent, other than noise suppression, does the intake flap serve any other purpose, and does removing it have any negative effects at all ??
Many thanks.

Get the Flap out!
Mine is out. Only fitted for german noise regs! :thumbs:

[Windowlicker]

Fair enough , nice response :smokin: :thumbs:

Off at a slight tangent, other than noise suppression, does the intake flap serve any other purpose, and does removing it have any negative effects at all ??
Many thanks.

Get the Flap out!
Mine is out. Only fitted for german noise regs! :thumbs:

Hence my question to someone who actually knows, rather than someone who heard it from someone who read it on a forum. :whistle:

[SMD]

Nope been told buy a good friend who has a mass knowledge of CSL's etc! :thumbs:

[Thorney]

THeir primary purpose is noise, however at lower RPM the restricted airlow is used by the MAP to adjust fueling, its minor but there.

[BMsport.com]

The flap is there just for noise control.

There is no restricted air flow at LOWER rpm, with the flap closed it sucks it in through the airduct attached to the underside of the airbox.

BMW wouldn't and haven't put a big flap in the front of the airbox to restrict airflow. Its all about noise control. To control airflow they have throttle plates, if they want to restrict air flow they close the throttle plates, so simple.

Nigel.

[Windowlicker]

The flap is there just for noise control.

There is no restricted air flow at LOWER rpm, with the flap closed it sucks it in through the airduct attached to the underside of the airbox.

BMW wouldn't and haven't put a big flap in the front of the airbox to restrict airflow. Its all about noise control. To control airflow they have throttle plates, if they want to restrict air flow they close the throttle plates, so simple.

Nigel.

So BMW went to the expense and effort of prducing a carbon airbox with an electronically controlled flap, a complex design required to house and control all this flappage, and it serves no purpose whatsoever?????????

Surely there is some sort of Ram air effect when at speed, as the snorkel on top of the slam panel assists with the air intake when the flap is open.

The airflow from the slam panel snorkel thorugh the open flap must be equal if not greater then the flow through the restictive "behind flap" pipework??

Why didnt BMW just make a closed airbox using the intake hole in the bumper as the sole feed. would have cost less, less to go wrong, and probably easier to make.

[dave1]

all japenese bikes and now ducati's have a computer controlled flap in the exhaust downpipe's just for noise reg's

[_Nathan_]

The flap is there just for noise control.

There is no restricted air flow at LOWER rpm, with the flap closed it sucks it in through the airduct attached to the underside of the airbox.

BMW wouldn't and haven't put a big flap in the front of the airbox to restrict airflow. Its all about noise control. To control airflow they have throttle plates, if they want to restrict air flow they close the throttle plates, so simple.

Nigel.

So BMW went to the expense and effort of prducing a carbon airbox with an electronically controlled flap, a complex design required to house and control all this flappage, and it serves no purpose whatsoever?????????

Er read his first sentence, quite clearly states what the purpose is...

I've taken mine off as it kept sticking

[Windowlicker]

The flap is there just for noise control.

There is no restricted air flow at LOWER rpm, with the flap closed it sucks it in through the airduct attached to the underside of the airbox.

BMW wouldn't and haven't put a big flap in the front of the airbox to restrict airflow. Its all about noise control. To control airflow they have throttle plates, if they want to restrict air flow they close the throttle plates, so simple.

Nigel.

So BMW went to the expense and effort of prducing a carbon airbox with an electronically controlled flap, a complex design required to house and control all this flappage, and it serves no purpose whatsoever?????????

Er read his first sentence, quite clearly states what the purpose is...

I've taken mine off as it kept sticking

I know what he said, i was just questioning the fact that if that is the sole function, and adequate airflow is available from the intake behind the flap, why even bother with an open airbox at all, why not just have a closed airbox bar the bottom feeding pipework, that takes its feed from the bumper hole.
No Noise issues, therefore no flap required , therefore cheaper and less complex .

[_Nathan_]

I don't see where anyone has said there is adequate air at all rev ranges from the internal intake - hence the car being down on power if it is stuck shut. Nigel was just saying that at low rpm the amount of air entering the engine is controlled by the throttle plates in the throttle bodies, not the air box flap.

Either way it makes bugger all difference to low speed running if you take it off.

[RichW]

Windowlicker, i think you've read into what Nigel has said wrongly.

He said that there was adequate airflow and no air restriction for low range rpm, he said nothing about higher rpm's, and nothing about the design of the airbox, the conversation is competely about the reason for the flap - low noise at low rpm.

[E46ACS]

RIGHT! :smt066

CSLRegister.com by-law 37b. :smt027

All members who have not done so already, must go and remove their flap IMMEDIATELY! :smt075

Let the nation hear us ROAR!!!!!! :smt097 :supz: