Announcement

Collapse
No announcement yet.

325e vs 325i driveability

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • SOneThreeCoupe
    replied
    https://www.r3vlimited.com/board/sho...d.php?t=252417

    https://www.bimmerforums.com/forum/s...or-E30-s/page2

    http://tech-racingcars.wikidot.com/aerodynamics

    Nothing official, but it's also not hugely consequential. I was merely coming up with comps because I think the claim is possible.

    Edit: Plus if you enter in the numbers (2900lbs, 0.015Crr, 0.39Cd, 20.9A, default fuel density, 0.20 efficiency, 0.83 drivetrain efficiency, 0 parasitic, default density) at this website: https://ecomodder.com/forum/tool-aer...resistance.php it comes up with 204.94hp at 150mph. 17% driveline loss puts us at 170.10whp.
    Last edited by SOneThreeCoupe; 07-30-2019, 03:29 PM.

    Leave a comment:


  • varg
    replied
    Originally posted by SOneThreeCoupe View Post
    0.39 Cd for big-bumper cars, 0.35 Cd for plastic-bumper cars.
    Source?

    Leave a comment:


  • 325e '87
    replied
    Originally posted by roguetoaster View Post
    ^^
    It bugs the heck out of me that people say a manual isn't an option because of traffic. It's normally only not an option for medical reasons or laziness, and with the right gearing it can be even better than an auto for creeping in traffic.

    That said, auto plus eta will work just fine, even if it won't be too exciting or terribly efficient.
    Yeah, me too. The manual is actually better in my experience. In heavy stop and go I hardly ever use my brake pedal, just idle along. People with autos have to work just as hard using their brake pedal, its the same thing really.

    Leave a comment:


  • SOneThreeCoupe
    replied
    Originally posted by varg View Post
    Yeah drag increases with the square of velocity and E30s are not exactly slippery.
    0.39 Cd for big-bumper cars, 0.35 Cd for plastic-bumper cars.

    The MG ZR 160 did 131mph with 159hp and a Cd of 0.40. The Clio Renault Sport 172 did 137mph and had 170 hp. Assuming a minimum loss of 10%, you'd be looking at 143whp and 153whp, respectively.

    I'm saying "within the realm of possibility."

    I'm also thinking '88 325 with plastic bumper conversion for combination Super eta and better aerodynamics.

    Leave a comment:


  • roguetoaster
    replied
    ^^
    It bugs the heck out of me that people say a manual isn't an option because of traffic. It's normally only not an option for medical reasons or laziness, and with the right gearing it can be even better than an auto for creeping in traffic.

    That said, auto plus eta will work just fine, even if it won't be too exciting or terribly efficient.

    Leave a comment:


  • 2mAn
    replied
    I have the manual and keep thinking I need to swap my auto eta but I have yet to seriously consider it... it ain’t broke so...

    Leave a comment:


  • ZeKahr
    replied
    Thanks for the feedback all. I'm thinking of going with an auto Eta over the i (live in an area with lots of traffic so stick is not an option). I'll only get an i if I can't find an Eta in good shape.

    Originally posted by E30 Wagen View Post
    I loved my etas and I don't think they get enough appreciation for what they are. They had plenty of go for daily driving and I got really good gas mileage, so I'd definitely recommend one.
    I second that. I see so many ads on here/FB marketplace/Craigslist where 325e owners chuck the M20B27 and auto tranny out of their etas. I read an old Motortrend issue on Curbside Classic that said the B27 and auto tranny were a match made in heaven due to the ample low-end torque of the engine. Personally I'm a lazy driver (I barely rev the engine past 3k), so I figure the Eta is more suited towards my driving style.

    Leave a comment:


  • digger
    replied
    a 2.7L alpina were in 14x top speed range. wouldn't be hard to get to 150. i wouldn't want to though except on a still day and excellent straight bit of road

    Leave a comment:


  • wworm
    replied
    Originally posted by varg View Post
    Yeah drag increases with the square of velocity and E30s are not exactly slippery.
    exactly

    Leave a comment:


  • varg
    replied
    Yeah drag increases with the square of velocity and E30s are not exactly slippery.

    Leave a comment:


  • e30strokr
    replied
    Originally posted by roguetoaster View Post
    A track prepped M42 car with no engine enhancements and a 4.1 rear end got very near to theoretical geared top speed when it did 143 or so drafting an E36 at Daytona. So, a bit more power and better gearing for top speed, such as an M20 typically has, could allow you to hit 150 under ideal conditions.


    However, the best speed I ever saw with a street car/M42/4.1 was 127 MPH approaching redline, and that's a significant difference.

    drafting is the main key on that one



    once you hit the air "wall" it takes quite a bit more to go any higher.. is not a "bit more"

    Leave a comment:


  • benwalsh91
    replied
    i chucked pretty much everything America has to offer at my 325e from the steep city streets of San Fran to Yosemite, it even went up pikes peak. it never skipped a beat and i never thought i was going to have to bale out the car and watch it disappear backwards down a hill.

    either one you choose will be a great car nonetheless. just find the best condition car that ticks most boxes in your price range.

    Leave a comment:


  • roguetoaster
    replied
    Originally posted by mach schnell View Post
    I highly doubt you’d ever actually reach 150mph in your M20-powered E30.

    A track prepped M42 car with no engine enhancements and a 4.1 rear end got very near to theoretical geared top speed when it did 143 or so drafting an E36 at Daytona. So, a bit more power and better gearing for top speed, such as an M20 typically has, could allow you to hit 150 under ideal conditions.


    However, the best speed I ever saw with a street car/M42/4.1 was 127 MPH approaching redline, and that's a significant difference.

    Leave a comment:


  • rmdashrf
    replied
    Originally posted by cheffy30 View Post
    thanks for correcting me there. soon i will have a getrag260 between her legs...
    i have zero complaints about this auto except for the fact it will not stop working perfectly...lol
    I'm a MT guy all the way. But a couple years ago I think I read an article on jalopnik that talked about the ZF and it made me remember it fondly for not being a PITA I have found every auto to be since then. Probably just bad memory, who knows, lol

    Sent from my GM1915 using Tapatalk

    Leave a comment:


  • E30 Wagen
    replied
    I loved my etas and I don't think they get enough appreciation for what they are. They had plenty of go for daily driving and I got really good gas mileage, so I'd definitely recommend one.

    Leave a comment:

Working...
X