06-05-2018, 07:55 AM | #24 |
Major
2934
Rep 1,304
Posts
Drives: 2021 C8 Corvette 1LT
Join Date: Jul 2016
Location: Pensacola
|
|
Appreciate
0
|
06-05-2018, 08:12 AM | #25 | |
Major
268
Rep 1,169
Posts
Drives: f83 / E93 335 / E70 X5 40d
Join Date: Sep 2007
Location: Adelaide, South Australia
|
Quote:
The b58 feels nothing like a laggy turbo engine. I recently drove a NA 'worked' (cams, headers, tune) LS3 powered car and I thought it was responsive and all, but lacked low down torque. Maybe you need to just drive a few different cars, ignore what's under the bonnet and then see which one you like. Also, are you driving in sport / manual mode ? |
|
Appreciate
0
|
06-05-2018, 09:04 AM | #26 | ||
2006 330i, TSM, Black, manual, sport
907
Rep 3,698
Posts
Drives: '17 C2, GTI, Z4 3.0si Racecar
Join Date: Nov 2005
Location: Chester Springs, PA
|
Quote:
Most new cars, save the ones already mentioned, are going turbo. You may be able to find a CPO CTS-V. It's a stellar car that is family friendly with an auto. Quote:
__________________
2017 Porsche C2 - manual of course
2015 GTI S 2008 BMW Z4 3.0si Coupe - because racecar |
||
Appreciate
0
|
06-05-2018, 09:38 AM | #27 |
Major
268
Rep 1,169
Posts
Drives: f83 / E93 335 / E70 X5 40d
Join Date: Sep 2007
Location: Adelaide, South Australia
|
|
Appreciate
0
|
06-05-2018, 10:11 AM | #28 |
Major General
4460
Rep 9,136
Posts |
I sense a recurring assumption that low end torque is better than a lack of it. When driven on a track, the ability to keep the revs up and torque not dropping off towards redline is much preferable to the B58 nature of torque falling off a cliff over 5k rpm.
The B58 is a great daily driver motor, but switching to the torque curve of an S55 or anything similar will likely satisfy the OP more. I gather they're more interested in a motor that revs easier but might not make as much low end torque or have as flat of a torque curve. Both common attributes of tiny little turbos. |
Appreciate
0
|
06-06-2018, 08:57 AM | #29 | |
Lieutenant Colonel
1479
Rep 1,678
Posts |
Quote:
the b58 is one of the least laggy turbos around but it still feels laggy compared to NA and for whatever reason i have serious lag sensitivity i drive in sport with paddles most of the time |
|
Appreciate
0
|
06-06-2018, 08:58 AM | #30 | |
Lieutenant Colonel
1479
Rep 1,678
Posts |
Quote:
ctsv is a real poss but reviews indicate the paddle shifters are very laggy... |
|
Appreciate
0
|
06-06-2018, 09:24 AM | #31 |
Banned
4658
Rep 1,395
Posts
Drives: Porsche 993, 2014 MB GLK
Join Date: Jan 2015
Location: The Golden Horseshoe, Ontario
|
Two AMG C63's in Toronto for under $100K....a lot of car. Turbo yes, but I don't think lag is going to be an issue with these V8's.
http://wwwb.autotrader.ca/a/mercedes...201J0&sprx=250 http://wwwb.autotrader.ca/a/mercedes...201J0&sprx=250 Having said that, you mentioned Porsche 991, I'd be on the Porsche all day long if that's what you're thinking. Last edited by RABAUKE; 06-06-2018 at 09:30 AM.. |
Appreciate
0
|
06-06-2018, 10:14 AM | #32 |
2006 330i, TSM, Black, manual, sport
907
Rep 3,698
Posts
Drives: '17 C2, GTI, Z4 3.0si Racecar
Join Date: Nov 2005
Location: Chester Springs, PA
|
I'd get a 991. Go drive one and you'll be leaving with it.
__________________
2017 Porsche C2 - manual of course
2015 GTI S 2008 BMW Z4 3.0si Coupe - because racecar |
Appreciate
1
RABAUKE4658.00 |
06-06-2018, 10:39 AM | #34 |
Lieutenant Colonel
1479
Rep 1,678
Posts |
991.1 base cpo is within budget and a poss...but having had 2 manual 981CS and having gotten bored of them i fear i wont be excited by a pdk base 991.1
i always wanted a multi valve v8...rs5 and rcf seem to be front runners ctsv also interesting but i had a c7 and didnt like it... |
Appreciate
0
|
06-06-2018, 10:49 AM | #35 |
Major General
4460
Rep 9,136
Posts |
A 991.1 S would be good, a base Carrera will be a little lacking. I personally prefer the 997.2 for the smaller size and simpler interior. Any chance of a 997.2 GTS?
The RS5 is 800 pounds heavier than a 991, has a bad weight balance and that 4.2L is sort of the model for carbon buildup. |
Appreciate
0
|
06-06-2018, 12:13 PM | #36 | |
2006 330i, TSM, Black, manual, sport
907
Rep 3,698
Posts
Drives: '17 C2, GTI, Z4 3.0si Racecar
Join Date: Nov 2005
Location: Chester Springs, PA
|
Quote:
RS5 will weigh about 800lbs more than a 991 as stated above and will feel sluggish compared to the 991.
__________________
2017 Porsche C2 - manual of course
2015 GTI S 2008 BMW Z4 3.0si Coupe - because racecar |
|
Appreciate
0
|
06-06-2018, 01:15 PM | #37 | |
Lieutenant Colonel
1479
Rep 1,678
Posts |
Quote:
i want to stick with cpo as it will be our only car so dependability and reliability are key cpo 991 s are well over 100k here in canada... yes rs5 are a bit chub |
|
Appreciate
1
Red Bread4460.00 |
06-06-2018, 01:17 PM | #38 | |
Lieutenant Colonel
1479
Rep 1,678
Posts |
Quote:
but will still drive one if when one shows up to confirm the S is more like 120K cpo.... |
|
Appreciate
0
|
06-06-2018, 01:19 PM | #39 |
Major General
4460
Rep 9,136
Posts |
For a non S, there's something to be said for the 991.2 and the additional torque. I know they start at $104k CAD, but can you find a light option CPO for under?
|
Appreciate
0
|
06-06-2018, 01:21 PM | #40 |
Lieutenant Colonel
1479
Rep 1,678
Posts |
|
Appreciate
0
|
06-06-2018, 01:55 PM | #41 |
Major General
4460
Rep 9,136
Posts |
Based on the B58? At least test drive the 991.2. It's nothing like the 718.
|
Appreciate
0
|
06-06-2018, 03:41 PM | #42 | |
Lieutenant Colonel
1479
Rep 1,678
Posts |
Quote:
recent trends meant if i wanted a late model german car i would ha e to go turbo...which i did having tried it for a bit...it is clear to me now i will go for non turbo as long as I can...991.2 might have very little lag but it still has it |
|
Appreciate
0
|
06-06-2018, 03:51 PM | #43 | ||
Major General
4460
Rep 9,136
Posts |
Quote:
My Mazda 3 was a truly horrible engine. No offense to the N52, as they're dead reliable and cheap, but there really isn't a single area (aside from the first three generations of HPFP) that the N54 didn't clean that things clock. Of all the things I didn't like about our 135i, the motor wasn't on the list. I tried to resist this trend too and I'm still fighting the three pedal war. But my GTI is so much better than my Mazda 3, even with its evil turbo. And honestly, with a flash it's even better, aside from the stock clutch clearly fighting a losing battle. Have you at least driven an F8x? Comparing an N/B motor to an S motor isn't really fair, especially if the N/B isn't flashed. I'll repeat, if you're just basing your lack of interest in turbos in the B58, a car that loses the will to live at 5k rpm, at least try a sportier turbo engine. If it wasn't so hard to flash the B motors, you'd have an easier time there. |
||
Appreciate
1
hooligan_G016542.50 |
06-07-2018, 01:39 AM | #44 |
Brigadier General
3058
Rep 3,433
Posts |
The "turbo lag" present in something like the 135, 240, M2, etc., isn't going to be noticeable for normal people. Making full torque around 1500rpm, it's not the turbo lag that causes the problems, it's the throttle lag/response and transmission IMO, the gear that it's in and how it responds to throttle inputs. Driving around in sport+ all day, I would challenge someone to come back and say these are really throwing a bunch of turbo lag. The dyno numbers don't show it. The hotter (closer to actual valves/manifold) turbos these days with twin scrolls or other setups respond very well IME. Small turbos spool fast, small hot turbos spool even faster, and full torque at 1500rpm makes turbo lag almost impossible to detect.
Like it was said above, these are tuned to have a flat curve, and small turbos tend to run out of air when you spin them faster, especially when you try to spin them to higher peaks (like an aftermarket tune), so they'll drop off past a certain point. So you could go with a bigger turbo, but that will give you actual lag, so you will deal with that. Then, you need big enough engine-displacement to deal with the lag. Too small and you will bog gears when cruising and attempting to increase speed or maintain speed up a mountain. I don't really think turbos are the problem here and the better turbo engines like BMW, Porsche, etc., do a great job of masking any traditional turbo behaviors. On the other hand, because the BMWs especially are intended to be sedate sedans at least part of the time and because they are now all controlled by electronics, you don't get to "choose" how it drives in terms of the throttle response and transmission, except that you can put it in sport+ every single time you start. These cars would get terrible mileage though if they were meant to maximize performance all the time. A few months back I rented a 4cyl turbo camaro (which by the way is nothing like driving my current ss 1LE). It was turbo-like and there was a distinct burst of power at the border line. It was still better than many I've driven in this sense, it wasn't crazy laggy, but you could tell it was there. This was very different from my BMW and some of the better turbo setups that I've driven. If you want to take an even bigger step backwards, go to a WRX STI, where you get even more lag. I would build significant torque starting 2800 and full maybe 3500 to 5.5 or so, but buy 6 it was slowing down and despite a 7.3K redline, it really wasn't doing anything at those engine speeds, definitely out of breath. These things also spin up almost instantly when they are in the turbo range, they are turning all the time and it only takes a fraction of a second IME to do this, to me, it's not a significant source of lag on a small turbo. Put a big turbo on a small engine like a GT35 on a 2.0 or 2.5 and sure, it's going to be crappy to spin up, it's going to make huge HP with all the supporting mods, but it's going to be laggy as heck. The goal usually is to have a flat torque curve to give you the most area under the curve, meaning when you hit the gas, get to the shift point, and upshift, you have more torque to start with at that lower RPM setting. The car that makes the same peak torque but has to build it will have much lower torque when it does the exact same thing, so the one with the flat maximum curve will always pull away when it comes to it's redline and shifts to a higher gear. You can also have an engine that builds more torque and HP and revs to a crazy high RPM, but it's going to be more work keeping that in the torque-range, especially if it's manual. I got the 2SS 1LE because it is a "raw" manual transmission NA car. It is definitely what I wanted in that respect and I am loving every minute of driving it, but turbo-lag was not a factor when I was comparing M2/3/4s and a few other models. Auto transmissions were.
__________________
Current: 2018 Camaro SS 1LE, 2023 Colorado ZR2. Former: BMW 428i Gran Coupe.
Last edited by RM7; 06-07-2018 at 01:44 AM.. |
Appreciate
2
Red Bread4460.00 IllSic_Design2126.50 |
Post Reply |
Bookmarks |
|
|