A high flow downpipe would likely allow the turbo to breath better up top. But the quarter mile improvement especially in trap speed says it all. Car picked up a ton of power.
Exhaust flow helps with torque gains, also helps with high rpm hp gains, so throwing a tune in will help with some things but you gotta remember that number on their exhaust system in just for the exhaust, no tune, stock motor. With the tune you need the exhaust or your just restricting flow and loosing power. Other than that love the video, would like to see numbers after you upgrade exhaust though.
If you tinker and start taking things apart, you can port the inlet and outlet of the stock compressor housing, and the exhaust elbow if it's anything like the stock Buicks. The biggest move you can make if you have it near you is go E85 ! I have it near me but not there yet.. I've got to get a bigger FP , injectors , & new chip burned , need to do valve springs also. I'm not going to go with FAST system.. I did get a TA49 but it's not in there yet.. Looking for low 12s on street tires ( another words the car won't hook well )
Lol on their website it says this is possible with their exhaust system. The drop of power at peak is because the engine is making more boost and that exhaust has no where to go ie backpressure. This is spot on what they’re claiming you just aren’t following their instructions.
@@RoguePhysicist because racecar is right, it states on their website that peak gains are only made in conjunction with their performance exhaust system. This is why there is a drop of power at higher RPMS since the engine isn't flowing properly.
The biggest issue is that Dinan uses a very large 10 hp sealed fan to feed the car air. On this test they didn’t supply the car with enough air to show real gains nor did they use the performance exhaust which reduces back pressure as well.
Thanks for the comparison! I can relate for two reasons.....A) I teach calculus and have reasoned through some of these curves in a similar way and even dabbled with the area under a dyno horsepower curve with my students.....and B) I own an f30 335i with Dinan Stage 2 (+MPPK flash stacked), Dinan intake, and Borla exhaust. I too had my car dynoed before and after. "Stock" (with just the mild OEM MPPK flash tune) I made 304 WHP and 308 lb-ft. After the Dinan Stage 1 tune, I made 330 WHP and 352 lb-ft.....all of this of course is measured at the wheels (Dinan measures at the crank) and it was done on a Dynojet. NOW, I have the stage 2 (+intake), but haven't had it dynoed. I'm guessing I'm around 350 WHP now though....dyno plans soon. Are you sure you were dynoing in the correct gear? Weird peak #s with the Dinan tune.....
The Nerd - I had my 335i (N55) Dyno test performed last week on a DynoJet. The car has Dinan Stage 4, Dinan Big Turbo, Dinan inter cooler, Dynan cold air intake and M Performance exhaust. Although I was not happy with the results (320 Whp/335 ft-lbs), because I expected more and Dinan advertises that this setup should make close to 448 hp/ 417 ft-lbs. II then contacted Dinan directly and basically said that I am a dissatisfied customer and that my cars Dyno test numbers are nowhere near what they advertise. Dinan explained to me that because my car is an XDrive, there is a 25% loss of HP/ft-lbs from engine to the wheels. When I did the math, the results were 400hp/418 ft-lbs. Dinan also said to me that tires are a big factor in Dyno testing (Due to grip). I happen to be running on BMW 18" run flats. They also said that the way in which the car is strapped down on the Dyno make a difference in number output. Needles to say, I am getting a second Dyno test today at a different performance shop, just to compare.. Just want to share my experience...
Engine horsepower is different than Horsepower at the wheel as a dyno measures. My 335i Dinan stage two with lots of upgrades only dynos about 302HP. There is a formula you can find online that you can use to convert that 302 HP at the wheel to what the HP measures at the engine. After doing the funny math conversion that I followed precisely , I came out at 360-365HP at the engine which is probably very close. Google up calculation to convert RWHP to engine horsepower. Using your dyno information in the formula- maybe closer to your expectations. I have an unusual Torque curve in that mytorque goes up sky high quickly and does not fall off until over 6,000rpm. At Fontana Speedway (AAA) in Ontario, CA, I stay well ahead of all the stock M3 cars out there. The Dinan oil cooler is so great, but seems to make most difference at high speeds. At 102 degrees my oil temp was just almost to 250 degrees. Picking up the pace to 120mph for just three minutes reduced the oil temp by 40 degrees. So this car that is notorious for running hot would be just right in Saudi Arabia to travel 130 mph when it is 125 degrees outside air temp. At the Fontana Speedway- no issues with cooling. It is the stock brakes that can not handle the high speeds of this car on the track. That really held me back. No need to go 135 in the straight if you can't slow down in time for the turns. You would just go out into the weeds and set the infield on fire. I am loving the big power and surging acceleration in this small luxury sports car.
Hey Malone - Is this your car being tested or are you performing the tests? I have a question... I have a 2013 BMW 335i w/XDrive (N55). I also have added a few Dinan performance parts and the BMW M-performance exhaust.-Dinan intercooler-Dinan Stage4-Dinan Big Turbo-Dinan Cold air intake. Dinan's website claims that the Car with all Dinan upgrades should have 448hp max and 417ft-lbs max. However I had my car Dyno tested and the car is making 320 WHP and 335 WFT-LBS (SAE). Do you know or do you think that Dinan's performance measurements are based on power made at the flywheel as opposed to power made at the Wheel? Thank you
Interesting results and results I'd take in a heartbeat. Same scenario with my GN . The tune improves the air/fuel via timing and fueling right where the motor loves it the most as far as Rpms. Now the car does not necessarily need to redline for max performance. I'll tell you that you will see a big improvement throughout the rpm range and top end if you go with a slightly larger turbo.
+John k I know. Unfortunately, there isn't a big turbo option for the N55. There are a couple companies which modify the stock turbo (Pure Turbo, for example). There is at least one company working on a big Borg Warner turbo. I had a '87 GN prior to this car. It was nice. Easy to bump up the boost simply by monkeying with the wastegate rod. Or bolt on a big turbo with supporting mods and have a 10-second daily driver. Mine wasn't that fast; I still used the stock turbo and up to 20 psi with alcohol to prevent detonation.
+ Malone the Physicist Are you happy with the power? I've been content with my f30, but I can't help to dream about an M (f80) in a year or so....we'll see.
+The Nerd The dyno results are a let down. But Dinan has redeemed itself with the strip performance. It exceeded my expectations. I wish the torque didn't drop off so quickly. But given the large spread between gears, especially between 1st and 2nd, I see the necessity for it.
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A high flow downpipe would likely allow the turbo to breath better up top. But the quarter mile improvement especially in trap speed says it all. Car picked up a ton of power.
What a great video !! Great job with data !!
Exhaust flow helps with torque gains, also helps with high rpm hp gains, so throwing a tune in will help with some things but you gotta remember that number on their exhaust system in just for the exhaust, no tune, stock motor.
With the tune you need the exhaust or your just restricting flow and loosing power.
Other than that love the video, would like to see numbers after you upgrade exhaust though.
If you tinker and start taking things apart, you can port the inlet and outlet of the stock compressor housing, and the exhaust elbow if it's anything like the stock Buicks. The biggest move you can make if you have it near you is go E85 ! I have it near me but not there yet.. I've got to get a bigger FP , injectors , & new chip burned , need to do valve springs also. I'm not going to go with FAST system.. I did get a TA49 but it's not in there yet.. Looking for low 12s on street tires ( another words the car won't hook well )
Lol on their website it says this is possible with their exhaust system. The drop of power at peak is because the engine is making more boost and that exhaust has no where to go ie backpressure. This is spot on what they’re claiming you just aren’t following their instructions.
What are the instructions that I am not following?
@@RoguePhysicist because racecar is right, it states on their website that peak gains are only made in conjunction with their performance exhaust system. This is why there is a drop of power at higher RPMS since the engine isn't flowing properly.
The biggest issue is that Dinan uses a very large 10 hp sealed fan to feed the car air. On this test they didn’t supply the car with enough air to show real gains nor did they use the performance exhaust which reduces back pressure as well.
Thanks for the comparison! I can relate for two reasons.....A) I teach calculus and have reasoned through some of these curves in a similar way and even dabbled with the area under a dyno horsepower curve with my students.....and B) I own an f30 335i with Dinan Stage 2 (+MPPK flash stacked), Dinan intake, and Borla exhaust. I too had my car dynoed before and after. "Stock" (with just the mild OEM MPPK flash tune) I made 304 WHP and 308 lb-ft. After the Dinan Stage 1 tune, I made 330 WHP and 352 lb-ft.....all of this of course is measured at the wheels (Dinan measures at the crank) and it was done on a Dynojet. NOW, I have the stage 2 (+intake), but haven't had it dynoed. I'm guessing I'm around 350 WHP now though....dyno plans soon. Are you sure you were dynoing in the correct gear? Weird peak #s with the Dinan tune.....
+The Nerd
I dynoed in 4th gear. But it shouldn't matter, because power isn't affected by gear ratios.
The Nerd - I had my 335i (N55) Dyno test performed last week on a DynoJet. The car has Dinan Stage 4, Dinan Big Turbo, Dinan inter cooler, Dynan cold air intake and M Performance exhaust. Although I was not happy with the results (320 Whp/335 ft-lbs), because I expected more and Dinan advertises that this setup should make close to 448 hp/ 417 ft-lbs. II then contacted Dinan directly and basically said that I am a dissatisfied customer and that my cars Dyno test numbers are nowhere near what they advertise. Dinan explained to me that because my car is an XDrive, there is a 25% loss of HP/ft-lbs from engine to the wheels. When I did the math, the results were 400hp/418 ft-lbs.
Dinan also said to me that tires are a big factor in Dyno testing (Due to grip). I happen to be running on BMW 18" run flats. They also said that the way in which the car is strapped down on the Dyno make a difference in number output.
Needles to say, I am getting a second Dyno test today at a different performance shop, just to compare..
Just want to share my experience...
Engine horsepower is different than Horsepower at the wheel as a dyno measures. My 335i Dinan stage two with lots of upgrades only dynos about 302HP. There is a formula you can find online that you can use to convert that 302 HP at the wheel to what the HP measures at the engine. After doing the funny math conversion that I followed precisely , I came out at 360-365HP at the engine which is probably very close. Google up calculation to convert RWHP to engine horsepower. Using your dyno information in the formula- maybe closer to your expectations. I have an unusual Torque curve in that mytorque goes up sky high quickly and does not fall off until over 6,000rpm. At Fontana Speedway (AAA) in Ontario, CA, I stay well ahead of all the stock M3 cars out there. The Dinan oil cooler is so great, but seems to make most difference at high speeds. At 102 degrees my oil temp was just almost to 250 degrees. Picking up the pace to 120mph for just three minutes reduced the oil temp by 40 degrees. So this car that is notorious for running hot would be just right in Saudi Arabia to travel 130 mph when it is 125 degrees outside air temp. At the Fontana Speedway- no issues with cooling. It is the stock brakes that can not handle the high speeds of this car on the track. That really held me back. No need to go 135 in the straight if you can't slow down in time for the turns. You would just go out into the weeds and set the infield on fire. I am loving the big power and surging acceleration in this small luxury sports car.
what fuel were you running it on, and im sure dinan is using their 104 octane when doing these claims and blowing nice cold air into the intake
93
Hey Malone - Is this your car being tested or are you performing the tests? I have a question...
I have a 2013 BMW 335i w/XDrive (N55). I also have added a few Dinan performance parts and the BMW M-performance exhaust.-Dinan intercooler-Dinan Stage4-Dinan Big Turbo-Dinan Cold air intake.
Dinan's website claims that the Car with all Dinan upgrades should have 448hp max and 417ft-lbs max. However I had my car Dyno tested and the car is making 320 WHP and 335 WFT-LBS (SAE).
Do you know or do you think that Dinan's performance measurements are based on power made at the flywheel as opposed to power made at the Wheel?
Thank you
Interesting results and results I'd take in a heartbeat. Same scenario with my GN . The tune improves the air/fuel via timing and fueling right where the motor loves it the most as far as Rpms. Now the car does not necessarily need to redline for max performance. I'll tell you that you will see a big improvement throughout the rpm range and top end if you go with a slightly larger turbo.
+John k
I know. Unfortunately, there isn't a big turbo option for the N55. There are a couple companies which modify the stock turbo (Pure Turbo, for example). There is at least one company working on a big Borg Warner turbo.
I had a '87 GN prior to this car. It was nice. Easy to bump up the boost simply by monkeying with the wastegate rod. Or bolt on a big turbo with supporting mods and have a 10-second daily driver. Mine wasn't that fast; I still used the stock turbo and up to 20 psi with alcohol to prevent detonation.
at hight rpm, your engine need more boost, stock turbo reachest the limits, add a big turbo and you will see
How has the reliability been with dinan, not sure if you still have the car.
I still have it. Dinan parts have been pretty reliable. Only once incident: the oil cooler hose sprung a leak due to rubbing against something.
+ Malone the Physicist
Are you happy with the power? I've been content with my f30, but I can't help to dream about an M (f80) in a year or so....we'll see.
+The Nerd
The dyno results are a let down. But Dinan has redeemed itself with the strip performance. It exceeded my expectations.
I wish the torque didn't drop off so quickly. But given the large spread between gears, especially between 1st and 2nd, I see the necessity for it.