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Go Back   E46Fanatics > Tuning & Tech > Driveline, Engine & DME Tuning

Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

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Old 02-14-2011, 12:42 AM   #321
Andy2108
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Thats enough horsepower and torque difference that it will make a pretty significant impact on how the car will drive...
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Old 02-14-2011, 07:39 AM   #322
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Most gains I've seen on tuning (stock anyway) is 15hp and 10tq I think. If not a little less.
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Old 02-14-2011, 07:58 AM   #323
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Most gains I've seen on tuning (stock anyway) is 15hp and 10tq I think. If not a little less.
That's a lot more than what I would have expected

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Old 02-14-2011, 10:33 AM   #324
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Hey Guys!

Yes, I'm still really interested in the intake, too. It'll be here soon enough. Before I slap it on I'm going to do a big tune-up. Plugs, front O2 sensors, oil change, driveline fluids. Then I'll do a new baseline, swap the intake while I'm on the dyno, and give it a go.

Believe me, I HOPE it makes power over what I have.
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Old 02-14-2011, 08:05 PM   #325
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What are your predictions as to how its gonna turn out? I've read that a long tube cai like the Dinan, will give good mid range but not as much up top.

Reason I'm asking is because I'm literally on the fence about buying one off another member, but there isn't any solid info making me sure that it will improve over the Dinan box I now have.
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Old 02-14-2011, 08:37 PM   #326
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Longer intake tubes are usually best for higher rpm power.

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Old 02-14-2011, 10:12 PM   #327
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Longer intake tubes are usually best for higher rpm power.

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That's the problem, I haven't found any solid info that supports that because there are so many different speculations. What is pretty obvious though is that a CAI has the disadvantage when compared to a RAI on the dyno since the hood is usually open during testing, allowing the ram air to get "cooler" air than it normally would.
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Old 02-14-2011, 10:15 PM   #328
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I remember reading somewhere that the ideal length for an intake is 10ft long, seriously... The problem is that there just isn't enough room in the engine bay and it's not practical. At least that is what I read lol.
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Old 02-14-2011, 10:24 PM   #329
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We gotta start running the intake down near the exhaust pipes lol
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Old 02-14-2011, 10:27 PM   #330
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We gotta start running the intake down near the exhaust pipes lol
I'm gonna just wrap some 4" tubing around my engine a couple times... The heat should make the air nice and warm

But I think the reason for the 10 feet is because of vacuum or something.
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Old 03-16-2011, 12:43 PM   #331
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Just read the thread. I'm jealous of your torque numbers, lol. Where are you getting the dyno's done? I think I read JoTech a while back? I did 240/210 there with a stock '06 Z. Still wish I had gotten another E46. The Z is better than the wretched pile of suck that was the Speed3, but that isn't say much. Sigh.

Anyways, enough of that noise. I assume that the next step is headwork? Any plans for that, or just going to keep it nice and simple where you are now?
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Old 03-16-2011, 01:13 PM   #332
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Just read the thread. I'm jealous of your torque numbers, lol. Where are you getting the dyno's done? I think I read JoTech a while back? I did 240/210 there with a stock '06 Z. Still wish I had gotten another E46. The Z is better than the wretched pile of suck that was the Speed3, but that isn't say much. Sigh.

Anyways, enough of that noise. I assume that the next step is headwork? Any plans for that, or just going to keep it nice and simple where you are now?
aren't they rated 306hp from the factory? 240whp is not 300 crank...

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Old 03-16-2011, 01:35 PM   #333
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aren't they rated 306hp from the factory? 240whp is not 300 crank...

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There are three VQs.

VQ35DE - 287 crank
VQ35DE RevUp (few small changes like I/E cam timing, revised plenum, higher redline, better airbox) - 300 crank
VQ35HR (not much in common with DE) - 307 crank

05 track and special eds get the RevUp, 06s get the revup, 07 on get the HR. According to JoTech, my numbers stock were right inline with every other stock 05 Track/Special and 06 they dyno. The stock 03-05s usually do 230 there, and the 07-08 do 250. Doin some ricer math, assume that we are loosing 20% through the drivetrain, then that is about 60hp, which puts us at 240. Oddly enough, the VQ35DE RevUp makes the least TQ out of all of them.

None of that takes into account different types of dynos, air temps, etc. And the fact that for some reason, unless it says "GTR" somewhere on the car, Nissan's horsepower feels less than everyone elses horsepower, lol. Still, it was good enough to beat up on some of my old Mazda buddies.
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Old 03-16-2011, 02:21 PM   #334
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I could be all gearing... but I didnt know the 350s changed that much. Usually I figure 15% loss on a manual. 20% is alot. maybe 20 for an automatic.
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Old 03-16-2011, 02:25 PM   #335
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I could be all gearing... but I didnt know the 350s changed that much. Usually I figure 15% loss on a manual. 20% is alot. maybe 20 for an automatic.
20 is a bit on the high side.

An again, you also have to take into account dyno's all produce different numbers. They are decent as tuning tools, better for measuring power changes as opposed to real numbers as well. There is another dyno in the area where the 2007 Z wll dyno just a nudge over 210 at the wheels, and one where I can get it to dyno at 270. Lots of factors.
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Old 03-16-2011, 05:25 PM   #336
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Originally Posted by Rob1796 View Post
There are three VQs.

VQ35DE - 287 crank
VQ35DE RevUp (few small changes like I/E cam timing, revised plenum, higher redline, better airbox) - 300 crank
VQ35HR (not much in common with DE) - 307 crank

05 track and special eds get the RevUp, 06s get the revup, 07 on get the HR. According to JoTech, my numbers stock were right inline with every other stock 05 Track/Special and 06 they dyno. The stock 03-05s usually do 230 there, and the 07-08 do 250. Doin some ricer math, assume that we are loosing 20% through the drivetrain, then that is about 60hp, which puts us at 240. Oddly enough, the VQ35DE RevUp makes the least TQ out of all of them.

None of that takes into account different types of dynos, air temps, etc. And the fact that for some reason, unless it says "GTR" somewhere on the car, Nissan's horsepower feels less than everyone elses horsepower, lol. Still, it was good enough to beat up on some of my old Mazda buddies.
The REVUP has VVT on the intake and exhaust, but the intake plenum sucks balls. Adding a Non Rev Lower and a spacer will pick power up all through the powerband.
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Old 03-16-2011, 05:27 PM   #337
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glad to see you guys are still working on the e46 stuff.

I am currently working on tuning my e30. pretty damn hard to make optimum use of the motronics stuff. I could not even imagine trying to find all the maps and stuff for an e46.
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Old 03-16-2011, 10:26 PM   #338
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The REVUP has VVT on the intake and exhaust, but the intake plenum sucks balls. Adding a Non Rev Lower and a spacer will pick power up all through the powerband.
Yup. Was thinking about picking up the Mrev until I did some research and found out it is a lightly modified 03-06 lower. Need to get the money to pick it all up though, and really I'd rather put money aside than into the Z. Just gonna pick up an exhaust and call it a day.
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Old 03-17-2011, 09:14 AM   #339
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Hey Rob,

No, not Jotech. I've been going out to LG Motorsports. Always easy to get in. Very consistent pulls. Here's a pull against my buddy's 2005 350z. Berk test pipes, TurboXS catback, Motordyne plenum spacer. This was his first pull and the only good pull he had that day. He kept losing power, even with 25-30 minutes between pulls. Not peak, but his low-mid power/torque was suffering. Still, He'd probably take me. He actually recently bought some HFCs, though. Drone was killing him.



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Just read the thread. I'm jealous of your torque numbers, lol. Where are you getting the dyno's done? I think I read JoTech a while back? I did 240/210 there with a stock '06 Z. Still wish I had gotten another E46. The Z is better than the wretched pile of suck that was the Speed3, but that isn't say much. Sigh.

Anyways, enough of that noise. I assume that the next step is headwork? Any plans for that, or just going to keep it nice and simple where you are now?
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Old 03-17-2011, 11:15 AM   #340
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It's pretty cool to see the difference in torque between the two. With the tune you should come really close to his numbers. Have you tried doing some highway pulls with him? I think you'd be suprised at the results...
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