[justpete]

Originally Posted by TheAxiom

I'm just going to get gunmetal and call it a done deal. Any reason to go with 8.5" over 9"?

Tires were just a wee bit too wide with 9", decided to stick with the rim width of the rear 286 and 216 wheels I was running previously. Might work for you though, no idea really. Probably would work in the back but I'm running square and it's really tight in the front.

[Mike.]

Originally Posted by justpete

The throttle and auto trans adaptation is psychotic and verges on lethal.

sounds like my kind of car haha

[justpete]

Originally Posted by Emozoo

sounds like my kind of car haha

Oh I don't know about that...

When you stomp on it to get on the freeway and the throttle closes to protect the engine and won't respond for a fraction of a second with traffic bearing down on you quickly it'll scare the ever lovin shit outta ya.


And the traction control is so bad I wonder who the hell wrote the code and if there were old enough to drive.

It's the anti-BMW.

Maybe they improved it but recent loaners don't seem a whole lot better and a helluva lot cheaper looking. Way way overpriced imho.

[Mike.]

Originally Posted by justpete

Oh I don't know about that...

When you stomp on it to get on the freeway and the throttle closes to protect the engine and won't respond for a fraction of a second with traffic bearing down on you quickly it'll scare the ever lovin shit outta ya.


And the traction control is so bad I wonder who the hell wrote the code and if there were old enough to drive.

It's the anti-BMW.

Maybe they improved it but recent loaners don't seem a whole lot better and a helluva lot cheaper looking. Way way overpriced imho.

Damn I was looking at 2013-2014 CPO ones. I'll have to test drive it extensively if that's the case! This is all speculative because I love my car, plus I can't leave this forum!!! The bunch we have here is pretty cool haha

[rick100]

Originally Posted by justpete

I have an '07 G35 sedan and unless Infiniti improved the hell out of the suspension in the coupe I'd have to say it doesn't handle nearly as remotely as well as the sport package on a sedan. The throttle and auto trans adaptation is psychotic and verges on lethal. Other than the great interior that disappeared when they cheapened the crap out of the G37, and made it buzzy as hell with the new engine (maybe it's better but the loaners at the dealership don't indicated it) I wrote off Infiniti for my next car in 2010.

Have to get a new car every five years for work and it has to be four door (dammit) and in 2011 the only choice was nothing. I dithered all year and got an extension which is how I walked into the dealership in the first week of January of 2012 and found my car on the showroom floor. Didn't want FI or a high revving V8 in a mushmobile so 328i it was. Felt like a pedal car compared to the G but in time that distinction disappeared given its vastly better handling. Just my opinion fwiw though.

I test drove a 2011 G37 IPL which is supposed to be more powerfull than the regular G37 and I did not find it that much faster than the 328. I was expecting to be blown away because it had 100 more HP under the hood and I was far from being blown away. I remember thinking maybe the 328 power is underrated and I was also feeling kind of happy that the 328 did not feel that much slower than the G37 IPL ... I m sure if they are put side by side the IPL will be faster but I m just talking about what it felt like when driving it.

The only car that really put a smile on my face when I pressed the gas was the 2013 mustang gt.

[justpete]

Originally Posted by rick100

I test drove a 2011 G37 IPL which is supposed to be more powerfull than the regular G37 and I did not find it that much faster than the 328. I was expecting to be blown away because it had 100 more HP under the hood and I was far from being blown away. I remember thinking maybe the 328 power is underrated and I was also feeling kind of happy that the 328 did not feel that much slower than the G37 IPL ... I m sure if they are put side by side the IPL will be faster but I m just talking about what it felt like when driving it.

The only car that really put a smile on my face when I pressed the gas was the 2013 mustang gt.

I think a lot of the perception was due to the lack of throttle delay in the G, to start with, compared to the 328i that always felt like the throttle was connected to the engine with spaghetti. The G throttle adaptation degraded its response once I started using it as if it was a true cable linked throttle. The software was seriously screwed up that way in that it didn't get increasingly slower in response it got increasingly nonlinear instead.

It'd jump, still does sometimes, if the gas pedal was depressed a small amount but the faster I stomped on it the faster that jump would collapse to what felt like a dying engine that would suddenly leap back to life, sorta. Very screwed up and it got worse keeping the trans in sport mode. Very unpredictable and just a serious pita.

The 328i otoh just had a shitty throttle response that didn't get worse but it didn't get better either. Felt like a vastly underpowered car in comparison especially with that really sloppy clutch and work-of-the-devil dual mass flywheel (who thinks this crap up anyway?). It wasn't until the AA tune fixed the throttle problem did the car start to feel like I would expect it to.

It's hard to describe and may be purely a function of that MY G but it's been flashed and updated over the years and still isn't quite right. I'll take the 328i in its current state with a 6MT (and a real clutch with a non-half-ass flywheel) any day over the G just because the stupid software the mfg's lawyers saddle the buyer with have been largely eliminated in the 328i.

[Mike.]

Originally Posted by justpete

I think a lot of the perception was due to the lack of throttle delay in the G, to start with, compared to the 328i that always felt like the throttle was connected to the engine with spaghetti. The G throttle adaptation degraded its response once I started using it as if it was a true cable linked throttle. The software was seriously screwed up that way in that it didn't get increasingly slower in response it got increasingly nonlinear instead.

It'd jump, still does sometimes, if the gas pedal was depressed a small amount but the faster I stomped on it the faster that jump would collapse to what felt like a dying engine that would suddenly leap back to life, sorta. Very screwed up and it got worse keeping the trans in sport mode. Very unpredictable and just a serious pita.

The 328i otoh just had a shitty throttle response that didn't get worse but it didn't get better either. Felt like a vastly underpowered car in comparison especially with that really sloppy clutch and work-of-the-devil dual mass flywheel (who thinks this crap up anyway?). It wasn't until the AA tune fixed the throttle problem did the car start to feel like I would expect it to.

It's hard to describe and may be purely a function of that MY G but it's been flashed and updated over the years and still isn't quite right. I'll take the 328i in its current state with a 6MT (and a real clutch with a non-half-ass flywheel) any day over the G just because the stupid software the mfg's lawyers saddle the buyer with have been largely eliminated in the 328i.

whats your 1/4 time and 0-60 on the 328. if you don't have a recording, a guesstimate

[justpete]

Originally Posted by Emozoo

whats your 1/4 time and 0-60 on the 328. if you don't have a recording, a guesstimate

No earthly idea, of zero interest. And with this clutch virtually impossible to get any meaningful numbers since it can't be launched easily. Really only concerned with traction circles and peak lateral and braking g loading capability. Well, that and lap times.

The datalogger can be used to find a rolling start to 60 time and a rolling start to quarter mile time I suppose but I haven't tried it as these numbers don't mean anything to me in any comparative sense. I couldn't begin to guess at times as I don't race light to light and have never been to a drag strip or attempted quarter mile runs in any car.

[justpete]

Originally Posted by Emozoo

whats your 1/4 time and 0-60 on the 328. if you don't have a recording, a guesstimate

That wasn't a very clear answer but there's a reason, sorry. It's possible to extract points on the torque curve from a dyno run, enter them into a spreadsheet and build up calculations of thrust at the road surface and from that compute optimal shift points and further estimate the time to a given speed. Doesn't include shift times or the use of the torque curve below the minimum revs on the dyno chart for the launch time. But it does show the change in times, and road forces, over dyno runs taken at different steps in modifying the engine.

It's very interesting to see how it changes with the LSD final ratio change as well as different effective loaded tire radii. A similar set of numbers can be generated for a 335i and times compared, roughly, as well as relative road thrust at given speeds in given gears. It's also possible to show the increase in time due to short shifting which is important to know on the track for where it can help and where it can hurt.

So while 0-60 times aren't of any interest in real world comparisons the theoretical time is since it can be compared to published numbers for the stock car as well as the 335i for instance although that's a flawed comparison to say the least. But it's helpful in comparative studies of where the torque curve is falling down in providing continued acceleration at higher speeds and thus led directly to estimating how much added torque might be unlocked with cams and leaning out the top end along with increasing the redline.

The book Fast Car Physics is helpful here if the techniques are unfamilar, excellent book in understanding what the car can and cannot do, etc.

[justpete]

No promises it's accurate or even useful, should be self-explanatory though. Only marginally useful for comparing changes as the calculations don't take into account a lot of other variables which makes this a way to compare idealized conditions, not real world conditions. The numbers then represent impossible to achieve best case results. FWIW, YMMV, etc.

gears_headers.xlsx.zip

[dgritti]

so i started the building process and got the AA headers coming will be here saturday
still will be some time before i have the tune and intake manifold and everything buttoned up but I'm EXCITED FOR IT TO COME TO LIFE

[dgritti]

Hey guys just wanted to update everyone on what im doing to my car. So as of Today i will be installing my AA headers with 3 stage intake manifold and AA tune for my car. Should be a interesting setup once everything is on and buttoned up.

A couple days ago we did a couple pulls with my stock car vs a C250 with a tune from a dig and from a 30 roll. From the dig his tune pulled on me. from the 30 roll is was so close it would have to been reviewed by a slomo camera. I think with my Tune and headers and goodies ill smash on him.

How ever i want to share what i'm doing to the 328i. Ill post some videos of what everything sounds like and feels like. Should be a good old time though.

[rick100]

Originally Posted by dgritti

Hey guys just wanted to update everyone on what im doing to my car. So as of Today i will be installing my AA headers with 3 stage intake manifold and AA tune for my car. Should be a interesting setup once everything is on and buttoned up.

A couple days ago we did a couple pulls with my stock car vs a C250 with a tune from a dig and from a 30 roll. From the dig his tune pulled on me. from the 30 roll is was so close it would have to been reviewed by a slomo camera. I think with my Tune and headers and goodies ill smash on him.

How ever i want to share what i'm doing to the 328i. Ill post some videos of what everything sounds like and feels like. Should be a good old time though.

sounds interesting ! def keep us posted, some videos and dynos would be awesome.

The 3 intake push above 4000 rpm should give you the edge and the power gain all around the rpm band with the headers should give you an even bigger advantage