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10-03-2012, 06:08 PM | #23 |
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the first thing i noticed in the video is that you are carrying much more speed through corners in the first(left) video, which would have nothing to do with your power. You are also getting on the gas sooner in the first one. There's your problem.
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10-03-2012, 06:20 PM | #24 |
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Right and I mentioned that. That's obvious. But on the last front stretch the supercharger should be hitting a much higher speed by the end than without.
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10-03-2012, 06:25 PM | #25 |
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a little bit of heat soak, worn out tires, and your nerves holding you back from the crashed car. All combined will shave off a few seconds. It's hard to compare trap speeds unless you start from a stop each time. I think most of it has to do with tires, both the wear levels and tread compound.
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10-03-2012, 06:37 PM | #27 | |
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But regardless of exit speed, you can clearly see the RPMs climbing faster and at a more linear rate than with the supercharger.
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10-03-2012, 06:48 PM | #29 |
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The car is plenty fast on the street. I know the power is there. It's just not significant at the track after engine temps hit 270.
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10-03-2012, 07:46 PM | #30 |
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Also have a ESS 535 and track it alot.
Compared to last year without the S/C, I am running about 10-15 mph faster at the end of straights ( Mid-Ohio, Watkins Glen, Lightning, & VIR). I got the M24 Oiler cooler, which keeps my oil temperatures cooler with the S/C than I was last year without either ( last year often hit 270F and this year never over 250F). Now I am in the great Northeast so I am not seeing 100F days when I am running. That might be the big difference between us. I do agree that the S/C will drive more maintenance ( spark plugs and wear) as I already have 30 tracks days on my 2011. Maybe I should have leased it
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10-03-2012, 08:18 PM | #31 | |
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01-11-2022, 08:18 PM | #32 |
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A decade old thread but still good.
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01-12-2022, 08:58 AM | #33 |
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Thx for the bump on this doc! Now that we have learned, this is the perfect kit to run with water/meth. No hot metal heat exchanger to block the ice cold meth injected post blower (as is the case with the intercooled kits). If I did a supercharger again, this is the route I'd take, but of course would need a long dyno tune session with the base ess650 tune, white injectors and a 8-9psi pulley. With enough meth, it would never heat soak even on a 100 degree track day.
I run a massive amount of meth on another car and my data logger sees below-ambient intake temps no matter what the conditions even on sustained wot pulls.
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01-12-2022, 11:34 AM | #34 | |
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. https://www.aquamist-direct.com/aquamist-all/ . https://www.aquamist-direct.com/806-...ime-4-5-weeks/ . What's your recommended meth solution? I am running the Harrop and often thought about meth.
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01-12-2022, 11:52 AM | #35 | ||
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Also, the aquamist controller use an injector pulse- width flow reference and it is very difficult for many to set up and operate effectively. It can be more precise but at significant hassle and complexity. The kit I have seen with very high effectiveness and reliability is a custom modified off the shelf Snow Performance stage 2 kit. The custom modifications include full steel braided lines and aircraft fittings. The Snow brain uses a boost-reference and that seems to be very easy to use and operate very reliably. For a track car I would avoid a blower and all the added weight and do cams, catless exhaust and a tune on pump gas. 420 wheel hp all the time would be amazing with some weight savings.
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01-12-2022, 12:54 PM | #36 | |
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I seem to recall your running a Snow Performance kit at Air-Strip events that you ran early on with your E92 M3. Your philosophy of NA, + Cams, + Catless + Tune is the way SYT_Shadow went - and his car is a real animal - as shown in his high quality videos whilst giving the 911s fits.. Though I think he added a 4.4L stroker kit too. There are some threads regarding the Schirmer N'Ring cars where rumors exist of them running a Harrop equipped car at the N'Ring. However, if that was done by Schirmer that car probably had mega augmented water cooling and intercooling. Thanks again for the advice. . https://www.m3post.com/forums/showth...ghlight=harrop .
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01-12-2022, 07:49 PM | #37 |
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I agree that 292 cams and headers would go a long way to give the E9X some much needed power on the track.
The acceleration curves of a 460whp stroker and a 625 kit are identical on the first hot lap, then the 625 kit degrades very quickly. The stroker will continue without overheating for a whole session, every time. Without going to a stroker, which in practical terms means a rebuild every two years, the 292 cam and a good tune (harder to get than one might think...) is probably enough. |
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01-13-2022, 08:51 AM | #38 | |
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https://www.caranddriver.com/reviews...-m3-gts-drive/ . https://www.ultimatecarpage.com/spec...92-M3-GTS.html . A car which in its day the Car Mags raved over. I see nowadays various companies are making stroker kits such as Lang Racing (just a few miles southeast of Huntington Beach, CA) as well as VAC. . https://store.langracing.com/83mm-st...90-e92-e93-m3/ . And a few threads including yours on the forums . https://www.m3post.com/forums/showthread.php?t=1414377 . Thanks for all your informative DIYs and advice. .
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01-13-2022, 08:56 AM | #39 | |
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I have a crank for a 4.4-4.6L S65 in my basement, one day I may build a second stroker and leave it at 4.4L instead of also boring it out to 4.6L. The stroker experience is really incredible, but extremely expensive due to reliability concerns. The stroker has now been swapped to my weekend E92 and the E90 will soldier on as a full street car with a regular 4.0 for now. |
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01-13-2022, 09:05 AM | #40 | |
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01-13-2022, 02:11 PM | #41 |
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Still feel like there isn't a solid amount of info on the 292 cams to justify the expense. My tuner, whom I consider to be one the best (Randy @ Epic) said not to expect huge gains from cams.. 10-15hp. My car makes 395/280 on 91 octane on a Dynojet. Feels plenty fast at 3250lbs with 4.10 gears. 420whp would be incredible.
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01-13-2022, 02:56 PM | #42 | |
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Tuners on this platform are busy printing money and copying and pasting files. They are not doing 'development'. The most popular tuner on this forum is not a tuner in the first place, as even a monkey can copy and paste random pieces of code around and create crappy tunes that knock all over the place. Besides, the day one tuner does the work many others will simply steal it. Since the mssflashers65 project came into existence we no longer have to wonder blindly whether tuner X or Y is good. We can clearly read and see how certain tuners disable knock adaptations, call for insane timing etc. We no longer have to wonder about these things.
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01-13-2022, 04:56 PM | #43 | |
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I think I'll eventually be ready to take the jump and give the cams a try, but will probably run this season as is and take a stab at it next year.
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