06-12-2016, 11:58 AM | #45 | |
Lieutenant
138
Rep 571
Posts |
Quote:
|
|
Appreciate
0
|
06-12-2016, 01:00 PM | #47 |
Colonel
1319
Rep 2,352
Posts |
That will result in taking the stroke up to 100mm from 89.3mm, assuming as close to but not over 5000cc (4977cc)
That is a big change and I wonder if that is necessarily the best idea. The same place just sells rods and pistons too https://www.pureperformancemotorspor...d-pistons.html https://www.pureperformancemotorspor...ting-rods.html |
Appreciate
0
|
06-12-2016, 01:13 PM | #48 | |
Captain
143
Rep 715
Posts |
Quote:
Not sure a longer rod ratio is the best idea for a high revving, high boost application. At 18k that's a lot of cheddar for a rotating assembly!! I'd like to see some engine dyno's of that setup from Pure. I'm sure they have developed and tested it but it would be great to see some real world results.
__________________
2015 M5 - Singapore Grey Metallic - Silverstone Full Merino Interior - Executive Pack - Drivers Assist Pack -Comp Pack -
|
|
Appreciate
1
|
06-12-2016, 03:07 PM | #49 |
Colonel
1319
Rep 2,352
Posts |
Just did a calculation online and the piston speed ends up being about the same as the S54 with it's 91mm stroke at 8k rpm as this s63tu50 design. So not completely into unknown territory as far as piston speed goes (and plenty of people boost the S54 and make 800hp M3's) but I wouldn't be keen on being the first person to try it without knowing a lot more back story.
They do sell a bunch of stroker options though for BMW engines if you check through their site, so it doesn't appear to be their first day doing this! |
Appreciate
0
|
06-12-2016, 04:08 PM | #50 |
Banned
31
Rep 301
Posts |
|
Appreciate
0
|
06-12-2016, 07:16 PM | #51 |
Colonel
354
Rep 2,176
Posts |
Do you really think there is zero detonation at 25-26 psi stock compression ?? I don't think so .Thats why there is no pump gas tune for the turbo upgrades .
|
Appreciate
0
|
06-13-2016, 05:28 AM | #52 |
Captain
184
Rep 788
Posts |
Note, I wasn't validating the stroker or any of the kits at Pure, I was just pointing out there are already build kits etc out on the market.
Also note a supercharged engine puts less strain on the rotaing mass from accelartive loads which max at TDC as the boost acts as a cusion. Also the S63 isn't a high reving engine, where 8,500 with bigger displacement is quite normal, its just for a turbo it rev's higher than is 'normal', this is for marketing because you can make all the torque you want at very low low rev's and a totally flat torque curve if you want... M-car drivers just wanted a few extra rev's to show this is a 'special' engine. |
Appreciate
0
|
06-13-2016, 09:17 AM | #53 | |
Banned
31
Rep 301
Posts |
Quote:
Assuming ideal a/f There is no detonation at 25-26psi running 100+ Or equivalent. |
|
Appreciate
0
|
06-13-2016, 09:31 AM | #54 | ||
Colonel
354
Rep 2,176
Posts |
Quote:
|
||
Appreciate
0
|
06-13-2016, 12:39 PM | #55 |
F10 1/4 WR: 9.9s / 142.5mph 1/2 WR: 175.5mph
1092
Rep 1,968
Posts |
There is detonation even at 20psi depending on gas. Read your plugs - they are the tell-tale for all!
Now pre-ignition is the rod-breaker... you don't want that! |
Appreciate
1
|
06-13-2016, 05:17 PM | #56 | ||
Major General
2883
Rep 7,886
Posts |
Quote:
I'm going to the dyno soon, but I'm guessing even with Map 1 setting the car is still over 700whp which is plenty for street use. I'm also planning on changing out spark plugs and coil packs at much shorter intervals in the future. Like Ram said spark plugs condition will give good indication of how everything is doing.
__________________
|
||
Appreciate
0
|
06-13-2016, 06:13 PM | #57 | |
F10 1/4 WR: 9.9s / 142.5mph 1/2 WR: 175.5mph
1092
Rep 1,968
Posts |
Quote:
|
|
Appreciate
1
|
06-13-2016, 06:40 PM | #58 |
Major General
2883
Rep 7,886
Posts |
That's cause you are next level. Lol!
__________________
|
Appreciate
0
|
06-16-2016, 08:05 PM | #60 |
Colonel
432
Rep 2,062
Posts |
How did that feel to the butt dyno? I'm looking into a simple meth kit and the thought crossed my mind that just running a tank of higher octane would likely give me a similar result as to what I might be able to expect.
__________________
'10 BMW X5///M - Alpine White on Sakhir Orange - JB4 w/ HCP Stage 2 BEF, NGK 97506 @ .20, SS tubing & BMC filters, gutted cats, AC Forged 312 22's, H&R 2"
'98 BMW 740iL - ///E39 M5 6spd swap, fully built engine (sleeved, P&P, cams), 3.46 LSD, H&R Stage 2/Bilstein HD, Magnaflow 14816's '97 BMW 328ci - ///E36 M3 clutch & L/W flywheel, Z4///M 18's |
Appreciate
0
|
06-16-2016, 08:07 PM | #61 |
Colonel
432
Rep 2,062
Posts |
I've read that someone was adding like 3 gallons of E85 at the end to make a full tank...are you doing the same?
__________________
'10 BMW X5///M - Alpine White on Sakhir Orange - JB4 w/ HCP Stage 2 BEF, NGK 97506 @ .20, SS tubing & BMC filters, gutted cats, AC Forged 312 22's, H&R 2"
'98 BMW 740iL - ///E39 M5 6spd swap, fully built engine (sleeved, P&P, cams), 3.46 LSD, H&R Stage 2/Bilstein HD, Magnaflow 14816's '97 BMW 328ci - ///E36 M3 clutch & L/W flywheel, Z4///M 18's |
Appreciate
0
|
06-17-2016, 07:43 AM | #62 |
Banned
31
Rep 301
Posts |
|
Appreciate
0
|
06-18-2016, 10:54 AM | #63 |
Colonel
432
Rep 2,062
Posts |
Unless going to specific gas stations that charge extra for ethanol-free, we all have 15% ethanol in our gasoline...I'm missing the point of your post. Once again, there was someone who was purposely adding extra E85 to run different timing, but I'm guessing that's not you.
|
Appreciate
0
|
11-28-2016, 09:38 PM | #65 | |
Major
446
Rep 1,300
Posts |
Quote:
|
|
Appreciate
0
|
Post Reply |
Bookmarks |
|
|