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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > C63 vs. JB4 335xi?



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      06-05-2012, 05:16 PM   #23
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Quote:
Originally Posted by pits200 View Post
Very very weak traps.

I had 4 runs. All 1/8th times were 88-91mph in the 7.8-8.0 range. Trap speeds, 109-112mph.

I know I know, don't laugh.

If it wasn't for my 60's, I'd be afraid to see what I'd run.

I have to post some logs, I had throttle closure a few times where it would just cutout and yes I had traction control off.
109 sounds right for a FBO only car even on an xi. You should trap 115 or so on meth if everything is dialed in.
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      06-05-2012, 05:18 PM   #24
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Originally Posted by Uptown General View Post
Challenge him to a race at a dig, let him floor his car and you drive out like a sunday driver You will beat him in his pocket because the C63 drinks fuel the way I drink soda lol
hahahha

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Originally Posted by pits200 View Post
Ya, the d's are better from a dig also, so that is pretty standard that you beat it from a roll since the d has such a small rpm range.

I mean, you can give it a whirl with the c63 but just have a few excuses ready like your johnson rod was loose or your bov was clogged.
Yea those things are pretty quick though. The torque they put out with just that JBD is crazy.

Hahaha that could work but i think i may just wait until i do at least one or two more mods.
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      06-05-2012, 05:19 PM   #25
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And OP, just race him. If you lose, you lose. What's the big deal? when you get more mods you can see how much they helped.
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      06-05-2012, 05:21 PM   #26
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Quote:
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And OP, just race him. If you lose, you lose. What's the big deal? when you get more mods you can see how much they helped.
True, I may but we'll see. We were maybe going to do it this Saturday on my way to get tints but idk if he's still coming. My car's still being serviced right now so it also depends how soon i get it back. I'm hoping it's done soon so i can get the JB4 put back in though
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      06-05-2012, 05:22 PM   #27
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      06-05-2012, 05:30 PM   #28
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This is just an overview, I know it's not zoomed in.
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      06-05-2012, 05:48 PM   #29
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Quote:
Originally Posted by pits200 View Post
Attachment 702669

This is just an overview, I know it's not zoomed in.
The logs show a lot. You're flatlining timing, your trims are tapping out at times and you're running more boost than you should.

You sure your meth is running properly? Also raise fuel pressure. Why is Shiv not helping you?
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      06-05-2012, 06:10 PM   #30
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Originally Posted by themyst View Post
The logs show a lot. You're flatlining timing, your trims are tapping out at times and you're running more boost than you should.

You sure your meth is running properly? Also raise fuel pressure. Why is Shiv not helping you?
I was running 50/50 e85 on this log and meth. I also had OL fueling set to 100% so not much more I can change.

I think the meth was intermittent at times but I'm still not sure why there was throttle closure. As for timing flatlining I'm still not sure why that happens in certain gears.
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      06-05-2012, 06:14 PM   #31
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Quote:
Originally Posted by pits200 View Post
I was running 50/50 e85 on this log and meth. I also had OL fueling set to 100% so not much more I can change.

I think the meth was intermittent at times but I'm still not sure why there was throttle closure. As for timing flatlining I'm still not sure why that happens in certain gears.
Been there, done that. I think your meth is taking a dump. There is no reason for your trims to be tapped out like that on stock turbos unless it was. Rev 2.5? PWM meth?
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      06-05-2012, 06:23 PM   #32
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Been there, done that. I think your meth is taking a dump. There is no reason for your trims to be tapped out like that on stock turbos unless it was. Rev 2.5? PWM meth?
Yup, my trims always get maxed out even at 16psi w/o meth on e85. I am pretty sure as my speeds get higher that this is the reason for my weak trap times and 1/4 speeds.
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      06-05-2012, 06:25 PM   #33
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Those xis suck something awful from a roll.
truth.

and this is coming from an FBO 335xi.
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      06-05-2012, 06:26 PM   #34
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Quote:
Originally Posted by pits200 View Post
Yup, my trims always get maxed out even at 16psi w/o meth on e85. I am pretty sure as my speeds get higher that this is the reason for my weak trap times and 1/4 speeds.
Rev 2.5 and PWM meth? I need to know this.

Try 93 octane with meth and ensure its running properly first. E85 requires that the fuel system works harder to achieve the desired result.
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      06-05-2012, 06:28 PM   #35
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Put race gas (ms109) if you run with c63. I think is your only chance...
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      06-05-2012, 06:30 PM   #36
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Quote:
Originally Posted by themyst View Post
Rev 2.5 and PWM meth? I need to know this.

Try 93 octane with meth and ensure its running properly first. E85 requires that the fuel system works harder to achieve the desired result.
Ya 2.5 and meth.

I have done plenty without e85 and 93 only with meth and 93 only without meth.. I pretty much get the same looking logs just lower boost. Flat lining and maxing out fuel trims.

Been told this happens with 6at.
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      06-05-2012, 06:53 PM   #37
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I don't think you'll lose at all. I'm gonna bet it'll be close...

Just make sure you catch him while you're in 2nd and at about 3.5k rpm.

If you lose...meh w/e.....great exp.
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      06-05-2012, 06:56 PM   #38
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with no other supporting mods i dunno... I know with FBO and E85 can take a stock C63.
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      06-05-2012, 07:10 PM   #39
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Quote:
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Put race gas (ms109) if you run with c63. I think is your only chance...
Yea only issue is idk where near me has race gas... It's already a 15-30 minute drive to get E85
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      06-05-2012, 07:39 PM   #40
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with no other supporting mods i dunno... I know with FBO and E85 can take a stock C63.
He has an xi.
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      06-05-2012, 07:46 PM   #41
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I hate that i got the XI lol and everyone wants to race from a roll 30-130...And i wanna get the i just ive invested so much for this car, ughh! i guess RBs are next lol

OP just race him and see where we stand! im going to race a E55amg in the next week or so, id like to see where i stand im FBO and running 60% 93 and 40% E85...
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      06-05-2012, 07:57 PM   #42
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OP : you definitely need meth to pass a c63 with an xi n54.
Just raced one, totally stock, 2011 c63 amg sedan. I'm FBO + meth, was running 91 octane + boost juice, 40 additive. From 60 to 140ish mph, I was about 1/4 to 1/2 car lengh in front of him, really not that much. Tried about 6-7 times, results were all the same. Those cars are just highway beasts. XI is not made for rolls, but needless to say I was really happy with the results. From a dig, I'd definitely be in front of it.
Also, my XI is MT, while c63 is automatic with freaking fast gear changes.
Long story short, c63 is a fast car.
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      06-05-2012, 08:06 PM   #43
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Quote:
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OP : you definitely need meth to pass a c63 with an xi n54.
Just raced one, totally stock, 2011 c63 amg sedan. I'm FBO + meth, was running 91 octane + boost juice, 40 additive. From 60 to 140ish mph, I was about 1/4 to 1/2 car lengh in front of him, really not that much. Tried about 6-7 times, results were all the same. Those cars are just highway beasts. XI is not made for rolls, but needless to say I was really happy with the results. From a dig, I'd definitely be in front of it.
Also, my XI is MT, while c63 is automatic with freaking fast gear changes.
Long story short, c63 is a fast car.
Cheers
If it were tuned he'd be like 3-4 cars ahead of you...
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      06-05-2012, 08:30 PM   #44
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If it were tuned he'd be like 3-4 cars ahead of you...
Yeah, lucky he wasn't tuned, I would have lost pretty bad.
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