08.5 vs 09 even match?

[mazdasp33d]

well i witnessed and 09 race an 08.5 from a 40 roll and it was on a deserted air strip or w/e. both cars are stock one has a motor mount but that shouldnt make a difference. the 08 had about 3700 miles on it and the 09 about a 1750. the 09 pulled every time but then out of no where the 08 came screaming by. just completely blew by the 09. how did this happen? the 09 driver didnt miss a shift, shifted about 5,800rpms no power shifting or anything.
how did this happen?
is the 08 a factory freak?
dsc make a difference?

 

[240ka]

different things could be taking place.

some people say "beat the piss out of the motor soon as you drive it off the lot" others say dont accel over 4k, never sit at a steady RPM letting the motor get into a rhytm. etc.

one motor could have been broken in better, one motor could have turbo probs, stock bpv could be leaking which results in a drop in hp b/c of drop in boost.

other person may have shifted at the wrong times.

im still learning my car since i got it abotu 2 weeks ago. but its seem that 5800k is the ideal shift point, after that the turbo drops off drastically

but there car are many reason why you saw the result you did. was there a passenger in either of the cars?

stock for stock. either you have a better driver, a better conditioned motor, or a motor thats not running the way it should

 

[mazdasp33d]

i have a feeling it was the motor the kid with the 08 drives hard everywhere. like the 08 won by i believe 1 and a half 2 lengths

 

[coyfish]

Driver . . . Maybe one is better at shifting . . . maybe one didn't downshift properly when starting from the 40 roll. Maybe one guy had the pedal to the floor instead of at about 85% (faster accell).

 

[15min5k]

Humor has it that the 08's came with 15+more WHP and 25+WTQ due to revised ECU programming. The 09's didn't get the ECU revision due to new emission reqs, etc.

 

[mazdasp33d]

i believe they were both in 3rd at the 40.. so 85% is better then floored

 

[coyfish]

Yeah you dont want to put the pedal to the floor. Keep it around 85 - 90% down for fastest accell.

 

[CBlueMS3]

Why?

 

[Renzokuken]

If the motor mount doesnt make a difference then why do they offer an aftermarket motor mount? These things DO make a difference. Less wheel hop, more power to the ground. Its a mod, and mods make a difference. Saying that it shouldnt make a difference is a very vague comment.

 

[mazdasp33d]

well from what i witnessed it didnt. it has to be the engine. im stumped. the 09 pulled but once the 08 hit 4th gear it just took off.

 

[240ka]

i just got back from trying the 85-90% and it does work. the motor and turbo seemed more responsive acceling quicker than with the pedal hammered

so whats happening when you put the hammer down, is there a slight fuel cut or something when flooring the pedal?

 

[Renzokuken]

I just noticed your race was from a roll. from a dead stop, the MM would have helped a little bit more, but yeah, just sounds like your car. and yes partial throttle DOES feel alot stronger than WOT at time with these cars.

 

[daonly1around]

i just got back from trying the 85-90% and it does work. the motor and turbo seemed more responsive acceling quicker than with the pedal hammered

so whats happening when you put the hammer down, is there a slight fuel cut or something when flooring the pedal?

and gullible isn't in the dictionary, you might want to go check that out while you're at it

 

[mckraut]

and gullible isn't in the dictionary, you might want to go check that out while you're at it

Before you go knocking this, have you tried it yourself? I've noticed this before as well. Maybe I'm batshit crazy, but I agree with 240.

 

[mazdaspeedster3]

Every car can be this way... You could be dumping useless fuel into the cylinder. I am not an engineer but notice a difference depending on gear and RPM that full WOT is not the answer.

 

[mazdaspeedster3]

Also, I have an 08 and my buddy has an 08.5. We are equally modded except he has the Cobb and I have an Injen. Typically my car is a bit quicker off the line but his car pulls on my above 100 mph. Niether of us can figure it out but every time we get over 100 he starts pulling, even with two people in his car.

 

[240ka]

and gullible isn't in the dictionary, you might want to go check that out while you're at it

i think you may want to try it yourself and see whos right. us or you.

naysayer

 

[Silver Ecstasy]

I'll bet the WOT just dumps too much fuel in. The car runs rich as it is, so maybe it's bogging the engine down with too much?

But then again, I thought even at WOT, our cars don't allow actual 100% wide open anyways??

 

[F430TECH]

The old Mazdaspeed Protege used to have the exact same problem it accelerated harder under partial throttle than just flooring it. Usually.

It's to do with how the turbo spools. Turbos work better under load, so they actually prefer a little bit of resistance when sucking air in. A gradual ramp up is and always has been the best way to drive a turbo car and trust me i have driven a LOT of them.

I do find that once the motor is good and hot the best way to drive it if you want to feel the greatest acceleration is to slowly feed the throttle in getting close to 80% at 4000rpm then flooring it at 5000 or so. Your metering the fuel with your foot. The idea about too much fuel is probably correct. You need to match the fuel with the amount of air going in.

But yes gradual increase = better turbo response. More often than not.

 

[240ka]

sweet, thanks man