Who wants 317bhp?
11-05-2006, 12:42 AM
#17
Instructor
I am ready to buy a ticket for this re-map guy to come to Virginia. We can round up as many people who are interested in a "group remap" over a 1 -2 week period and get this done. No - I am serious! Let's start the petition. Price discussions too.
11-05-2006, 01:29 AM
#18
Originally Posted by kb
I am ready to buy a ticket for this re-map guy to come to Virginia. We can round up as many people who are interested in a "group remap" over a 1 -2 week period and get this done. No - I am serious! Let's start the petition. Price discussions too.
11-05-2006, 03:56 PM
#21
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Sorry guys..... just been for a spin and the difference is night and day. Part throttle acceleration better as well as WOT. Apparently he can play with the timing of the resonance flap and varioram to smooth out the torque and power curves. Also a lot smoother on and off the throttle.
I've attached the power/ torque printout corrected to flywheel bhp. Remember that I have removed the cats so have a better than std baseline to start with.
Before
291.5 bhp @6560rpm and 259 lb/ft @5440rpm
After
317.4 bhp @6620rpm and 290.9 lb/ft @4630rpm
Even if the accuracy is +/- 10bhp it's still not bad.
I'll see if he fancies a trip to the States.........
I've attached the power/ torque printout corrected to flywheel bhp. Remember that I have removed the cats so have a better than std baseline to start with.
Before
291.5 bhp @6560rpm and 259 lb/ft @5440rpm
After
317.4 bhp @6620rpm and 290.9 lb/ft @4630rpm
Even if the accuracy is +/- 10bhp it's still not bad.
I'll see if he fancies a trip to the States.........
11-05-2006, 04:18 PM
#22
Pro
the numbers are impressive!
what octane fuel do you have to use?
so many of these remaps or chips require 100-105 octane race fuel.
very expensive and not so easy to find in the USA.
using 92-93 octane pump premium in these modified cars can cause damage.
you dont want to run low on race fuel on a trip and be stranded.
better think about the limitations before making such a change.
thanks for the post!
jeff
what octane fuel do you have to use?
so many of these remaps or chips require 100-105 octane race fuel.
very expensive and not so easy to find in the USA.
using 92-93 octane pump premium in these modified cars can cause damage.
you dont want to run low on race fuel on a trip and be stranded.
better think about the limitations before making such a change.
thanks for the post!
jeff
11-05-2006, 04:25 PM
#23
Instructor
Originally Posted by Bull
Whether at the flywheel (FWHP) or at the rear wheels (RWHP), it is all measured in brake horsepower (bhp).
pump, fan, alternator, etc. running off the engine. It always is the highest
number and it is a true measure of what the engine will do.
The "b" in bhp stands for "brake", and you say "brake horsepower".
It is said this way because the dynamometer is a "brake" dynamometer.
The dynamometer is a huge electrical generator connected to a honking
big resistor. The power generated by the engine heats up the resistor.
The speed of rotation of the generator may be meaured with great
accuracy and the power rejected by the resistor may also be measured
with high accuracy.
rwhp is what you meaure on a wheel dynamometer. The car is running
basically as it does on the road with all engine accessories such as
water pump, cooling fan and alternator, plus all the driveline losses such
as gear friction, oil splash in tranny and diff, tire deforming etc.
A good rule of thumb is that for a manual car, rwhp will be on the order
of 15 - 17% lower than bhp. That is, all the losses from the crank
to turn the wheels is on the order of 15-ish percent.
11-05-2006, 05:48 PM
#27
Pro
the USA cars are mapped to run on minimum 93 octane fuel.
i live on the west coast and the highest octane i can get from the pump is 92.
there are a few race shops that sell 95, 100 and 105 but the law states that it is for racing purposes only and they can not put it in your car.
they hand crank it in to a 5 gallon can and you have to put it in the car yourself.
no big deal if this is your race car and you only drive it on the track but if you like to take long leisurely drives on the road, you better pay close attention to your gas gauge. put 92 in your car that requires 98, it will run like CRAP and will probably damage it.
this makes owning a remapped or radically chipped car very impractacle in this country.
you guys on the other side are very lucky to have such easy access to hi end fuel.
how much do you pay for 99 octane fuel over there?
how much do you pay for 92?
i live on the west coast and the highest octane i can get from the pump is 92.
there are a few race shops that sell 95, 100 and 105 but the law states that it is for racing purposes only and they can not put it in your car.
they hand crank it in to a 5 gallon can and you have to put it in the car yourself.
no big deal if this is your race car and you only drive it on the track but if you like to take long leisurely drives on the road, you better pay close attention to your gas gauge. put 92 in your car that requires 98, it will run like CRAP and will probably damage it.
this makes owning a remapped or radically chipped car very impractacle in this country.
you guys on the other side are very lucky to have such easy access to hi end fuel.
how much do you pay for 99 octane fuel over there?
how much do you pay for 92?
11-05-2006, 05:49 PM
#28
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Originally Posted by wayne325
bhp is measured at the crank shaft with no accessories such as water
pump, fan, alternator, etc. running off the engine. It always is the highest
number and it is a true measure of what the engine will do.
The "b" in bhp stands for "brake", and you say "brake horsepower".
It is said this way because the dynamometer is a "brake" dynamometer.
The dynamometer is a huge electrical generator connected to a honking
big resistor. The power generated by the engine heats up the resistor.
The speed of rotation of the generator may be meaured with great
accuracy and the power rejected by the resistor may also be measured
with high accuracy.
rwhp is what you meaure on a wheel dynamometer. The car is running
basically as it does on the road with all engine accessories such as
water pump, cooling fan and alternator, plus all the driveline losses such
as gear friction, oil splash in tranny and diff, tire deforming etc.
A good rule of thumb is that for a manual car, rwhp will be on the order
of 15 - 17% lower than bhp. That is, all the losses from the crank
to turn the wheels is on the order of 15-ish percent.
pump, fan, alternator, etc. running off the engine. It always is the highest
number and it is a true measure of what the engine will do.
The "b" in bhp stands for "brake", and you say "brake horsepower".
It is said this way because the dynamometer is a "brake" dynamometer.
The dynamometer is a huge electrical generator connected to a honking
big resistor. The power generated by the engine heats up the resistor.
The speed of rotation of the generator may be meaured with great
accuracy and the power rejected by the resistor may also be measured
with high accuracy.
rwhp is what you meaure on a wheel dynamometer. The car is running
basically as it does on the road with all engine accessories such as
water pump, cooling fan and alternator, plus all the driveline losses such
as gear friction, oil splash in tranny and diff, tire deforming etc.
A good rule of thumb is that for a manual car, rwhp will be on the order
of 15 - 17% lower than bhp. That is, all the losses from the crank
to turn the wheels is on the order of 15-ish percent.
Edit: Just to be more complete, the hp measured at the flywheel, as the engine would be outfitted in the car, is more accurately expressed by using SAE net hp figures, not bhp.
Last edited by Bull; 11-05-2006 at 06:12 PM.
11-05-2006, 05:57 PM
#29
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i don't recall with precise accruacy but I believe US equivallent is for 98 RON is about 93. Can someone either confirm or correct my poor recollection?
11-05-2006, 05:58 PM
#30
Rennlist Member
Guys,
Dont get RON octane figures mixed up with MON (which the US uses). 93 in the US us close to 98RON in the UK. The premium fuel in the UK may be a little more potent than the premium fuel in the US - its not as big a difference than it looks. Also I understood all Varioram cars are OBD2...
Cheers
Dont get RON octane figures mixed up with MON (which the US uses). 93 in the US us close to 98RON in the UK. The premium fuel in the UK may be a little more potent than the premium fuel in the US - its not as big a difference than it looks. Also I understood all Varioram cars are OBD2...
Cheers