Hi Guys,
As some of you may know the weekend just gone was set aside to carry out some changes to my Euro Spec GTR here in "Not so sunny" Scotland.
Firstly we did a standard run to get a nice baseline figure to show percentage improvement.
The dyno was a Dyno Dynamics unit and this dyno had tested another standard local GTR so we had another figure as a comparison.
This other GTR was tested a few weeks ago at 462 BHP which is at the bottom end of the quoted 460-480 bracket.
My car carried out it's standard run and achieved 479.6 BHP which i was very happy with as it was at the top end and within a whisker of the manufacturers quoted figure of 480 for the car.
The run was carried out in 4th gear.
Next we loaded up the Cobb Stage 2 map and carried out another run - this achieved 527 BHP.
A nice 47 BHP increase just from the Cobb Stage 2 and no hardware changes what so ever.
Lastly we took the car into the workshop and fitted a GTC full titanium Race Exhaust system from Ben which included the Y Pipe and we carried out another run.
The figure with hardware changes and Cobb Stage 2 were 533 BHP.
This was less than expected after deleting the 2 centre cats and changing the whole exhaust system but we are confident that with a custom tune this will give us a little bit more out of this set up. A live mapping session is planned for Saturday 15th August.
1 positive thing noted from the before and after of fitting the exhaust system was the throttle response.
To recap:
Standard Car - 479.6 BHP
Cobb Stage 2 Only - 527 BHP
Cobb Stage 2 + Full Titan Titanium race exhaust + Y Pipe - 533 BHP
Copies of Dyno sheets with the before and after overlayed will be posted ASAP - Numb nuts here forgot to bring them to work with him and they are sat in the car at the Airport (No use there i know, it was an early start this morning)
The second stage of seeing what difference the mods made was a trip to Crail Quarter Mile track on Sunday.
The car had been taken there previously and the best time was an 11.8 dead which was matched by a friends GTR running exactly the same time, it was impossible to alter this time regardless what we both did with the 3 magic buttons we tried RR Off RRR you name it.
Yesterday was better - the quickest run of the day was an 11.53 and the worst run of the day was an 11.86 - The 60ft times are still poor around the 1.9 mark even using the 2.5/3k launch.
The car performed well, never got beat all day and even managed to hold off a Porsche Turbo which ran an 11.9.
Link to Times - Crail Raceway Drag Strip Race Results
All Quarter Mile runs in my car were with 2 people and with a full to 3/4 tank of fuel, none of this draining the tank down and using wafer thin supermodels to drive the car to save weight.......yours truely and my passenger are 120 Kgs + EACH........
To follow are pictures of the exhaust and videos of the runs including the Dyno sheets.
Apologies for not having them to hand it was a hectic weekend i promise to post them ASAP.
Hopefully this process will help others decide which route they want to go down, from what i have experienced the Cobb is the best bang for your buck initially and even with everything standard should give a 10% or so improvement in BHP over stock. Great increase in torque figures as well but i can't remember them off the top of my head.
If you want to go down the Race Exhaust and Y Pipe route then it appears that a custom tune is essential to unlock the full potential of these hardware changes.
Regards
ScottyB
As some of you may know the weekend just gone was set aside to carry out some changes to my Euro Spec GTR here in "Not so sunny" Scotland.
Firstly we did a standard run to get a nice baseline figure to show percentage improvement.
The dyno was a Dyno Dynamics unit and this dyno had tested another standard local GTR so we had another figure as a comparison.
This other GTR was tested a few weeks ago at 462 BHP which is at the bottom end of the quoted 460-480 bracket.
My car carried out it's standard run and achieved 479.6 BHP which i was very happy with as it was at the top end and within a whisker of the manufacturers quoted figure of 480 for the car.
The run was carried out in 4th gear.
Next we loaded up the Cobb Stage 2 map and carried out another run - this achieved 527 BHP.
A nice 47 BHP increase just from the Cobb Stage 2 and no hardware changes what so ever.
Lastly we took the car into the workshop and fitted a GTC full titanium Race Exhaust system from Ben which included the Y Pipe and we carried out another run.
The figure with hardware changes and Cobb Stage 2 were 533 BHP.
This was less than expected after deleting the 2 centre cats and changing the whole exhaust system but we are confident that with a custom tune this will give us a little bit more out of this set up. A live mapping session is planned for Saturday 15th August.
1 positive thing noted from the before and after of fitting the exhaust system was the throttle response.
To recap:
Standard Car - 479.6 BHP
Cobb Stage 2 Only - 527 BHP
Cobb Stage 2 + Full Titan Titanium race exhaust + Y Pipe - 533 BHP
Copies of Dyno sheets with the before and after overlayed will be posted ASAP - Numb nuts here forgot to bring them to work with him and they are sat in the car at the Airport (No use there i know, it was an early start this morning)
The second stage of seeing what difference the mods made was a trip to Crail Quarter Mile track on Sunday.
The car had been taken there previously and the best time was an 11.8 dead which was matched by a friends GTR running exactly the same time, it was impossible to alter this time regardless what we both did with the 3 magic buttons we tried RR Off RRR you name it.
Yesterday was better - the quickest run of the day was an 11.53 and the worst run of the day was an 11.86 - The 60ft times are still poor around the 1.9 mark even using the 2.5/3k launch.
The car performed well, never got beat all day and even managed to hold off a Porsche Turbo which ran an 11.9.
Link to Times - Crail Raceway Drag Strip Race Results
All Quarter Mile runs in my car were with 2 people and with a full to 3/4 tank of fuel, none of this draining the tank down and using wafer thin supermodels to drive the car to save weight.......yours truely and my passenger are 120 Kgs + EACH........
To follow are pictures of the exhaust and videos of the runs including the Dyno sheets.
Apologies for not having them to hand it was a hectic weekend i promise to post them ASAP.
Hopefully this process will help others decide which route they want to go down, from what i have experienced the Cobb is the best bang for your buck initially and even with everything standard should give a 10% or so improvement in BHP over stock. Great increase in torque figures as well but i can't remember them off the top of my head.
If you want to go down the Race Exhaust and Y Pipe route then it appears that a custom tune is essential to unlock the full potential of these hardware changes.
Regards
ScottyB
