ddlopresti

iTrader: (1)

So this weekend me and my buddy did a couple of pulls at the local road course on the back straight side by side to see how our cars and modding were coming along.

I have a 2013 gsr putting down 310/398 (wtq/whp - mustang numbers) on 93 with a bbx lite (ball bearing) turbo and also weighing 3460 and he has a 2008 335 xi with JB 4 and intake running Map 5. From 40 - 70 and from 60 -120 (2 different pulls) the results were the same and surprising to me and just wanted to reach out to the community to see what you guys think.

I only pulled about 1 car length on him and he pretty much kept up with me, i was pulling ever so slightly from second to 4th gear and then he started to catch up a bit once I was in 5th gear

Both of us had good shifts with no missed shifts. I'm confused by this because i have about 200lbs less than him and about 50-80 more peak HP so i thought i would just walk away from him. I'm wondering if this issue is that the 3.0TT inline 6 just has soooo much more tq than me that I'm only starting to pull on him above 6k rpms? I'm going to add more boost soon, right now only 24.5 going to add about 2lbs to it and see what that does - hopefully the tq comes up 20-30 ft/lbs.

Napalm_Enema

I think your main problem may be racing 'high end' with your car, which is strongest in the lower range. Then you raced a BMW which are notoriously stronger 'high end' cars, so I think you are just not running to your cars strengths imo.

ImEv0

iTrader: (3)

too many variables. maybe you suck at shifting or your friend is awesome at shifting? maybe his car is running at 100% and something is wrong with your car? at the end of the day, everything is just speculation with no hard data to back anything up. that's why street racing should not be used to measure anything.

evojay85

Sounds like the 335I has a driver mod! In all seriousness though, wayyyy too many variables to tell what's up

ddawg1130

iTrader: (1)

Can't compare horsepower if not measured on the same dyno. So you might not be making much more then him.

Evo is awd and has more drivetrain loss, so even if he is making less, he's putting a larger percentage of that power to the ground. Gear ratio's also make a difference.

ChipperEvo

iTrader: (3)

398 WTQ on a Mustang on stock internals (I assume)? dayum

ikt

iTrader: (18)

310tq is all? Seams weird. If it's the tune it could be MIVEC issues. Or, you're roll racing a rwd touring sedan in your AWD rally sedan. Go from a full stop and you'll win every time! Kinda like Supra guys always race from a roll and never from a stop Hell an X would smoke a stock Ferrari...until you get to about 35mph.

ddlopresti

iTrader: (1)

310 wtq and 398 whp

ddlopresti

iTrader: (1)

its 310 mustang tq - so about 330-40 on a dynojet, but yes the tq feels low for sure and that is definitely a big part of why i didn't pull away more. Also, his car is a 335 XI - so it is awd as well, my car weighs about 200 lbs less than his and we both have AWD drive train loss

ctfpevoVIII

iTrader: (4)

The 335 xi is also AWD , but I totally agree with you about not being on the same dyno . Also keep in mind that if the BMW is manual transmission , they have longer gears then the evo which helps it accelerate longer with all that torque it makes.

ikt

iTrader: (18)

...well...maybe do an endurance challenge and see who's ride still runs great at 60k then! Even though it's a 335xi, they are still geared differently since I think they have the same drivetrain as an "i" with an added front differential for the AWD.

Ev0ikon

iTrader: (18)

AWD drivetrain lost gets higher the faster you go against a 2WD car.

andrewzaragoza

iTrader: (6)

too many variables. another variable is your shift point. with a dyno graph you should more or less find your ideal shift point. chances are, with your turbo(not sure what other mods you have) you should be shifting below 7k for sure.