Originally Posted by jcbrx8
(Post 4945319)
For those w/ experience &/or running lighter flywheels ...what are your opinions / thoughts pro or con for running a lighter fly-wheel in ... albeit a spirited ..., but somewhat DD (I work from home)?
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Originally Posted by TeamRX8
(Post 4945327)
... I won’t fuss over it any more than I already did, but disagree that you can just size up different wheel sizes to compare one manufacturers turbo to the map of another. Then trying to use those efficiency points to me suggests a lack of understanding.
. For the life of me I don't understand why Precision doesn't distribute maps :suspect:, and while a poor marketing decision...it doesn't negate that their product c/b a good "value". I have had no issue w/my 6266, and am well aware that others Mfgs provide more bells & whistles ...for a premium.
Originally Posted by TeamRX8
(Post 4945327)
... Just out of curiosity, did you give any consideration to hacking off the Precision v-band & replace it to use a Garrett G-series turbo instead?
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"0 to 100", Appreciate your response, but yeah as Team suggestions ...I'm thinking any add'l acceleration will likely be imperceptible w/ a turbo.
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I used to run a lightweight flywheel on my old Greddy setup. What I noticed was I would spin the tyres in 2nd gear .............a lot. At the time I thought it was the LWFW but later realised it was just that back then I ran cheap tyres. So .............just another argument for gaining hard data for any mod. that's done vs the ole butt dyno.
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:yelrotflm. Truth.
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OE is ~16.8 lbs (per Racing Beat) but that includes an integral CW. The auto-trans CW that an aftermarket flywheel requires is 3.6 lbs.
So all you’ll get for mass reduction is 13.2 lbs - X.X lbs of the aftermarket flywheel. It’s just not that much mass compared to OE flywheels that weigh 30+ lbs. The OE flywheel is lighter than some FC/FD RX7 aftermarket flywheels w/CW even. The lightest standard clutch RX8 flywheel that I’m aware of is the Racing Beat aluminum at 8 lbs. So you’ll only drop around 5 lbs and that’s practically nothing against turbo output not likely to rev much to or past 8000 rpm. |
EDIT: Well, still coming up to speed on interpreting compressor maps... so l'll keep this simple. Some trends appear evident when comparing the below three compressor maps:
- TD05H 18G: ~ 3000 full spool / 120k compressor speed / potential ~ 300 wHP - GTX3582 / PT6266 comparable: full spool ~ 4200-4300 rpm / ~90k compressor speed, potential ~500+ wHP - GTX3576 / PT5862 comparable: estimated spool ~ 3700 rpm / ~105k compressor speed, potential ~400+ wHP . we shall see... https://cimg5.ibsrv.net/gimg/www.rx8...4c4d34d6e4.png . https://cimg3.ibsrv.net/gimg/www.rx8...df3a4716e3.png . https://cimg2.ibsrv.net/gimg/www.rx8...4519bfb5bd.png . |
not sure whether to 😢 or :icon_no2: …
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Originally Posted by TeamRX8
(Post 4945739)
not sure whether to 😢 or :icon_no2: …
. So, do you think this not worth the exercise given the use of "comparable" maps..., or that incorrect assessments h/b made? :dunno: |
both, would prefer to see someone choose a more certain outcome over compounding assumption upon assumption:
https://cimg9.ibsrv.net/gimg/www.rx8...70c344f64.jpeg but what God closes, no man can open … 🤨 . |
Originally Posted by TeamRX8
(Post 4945775)
both, would prefer to see someone choose a more certain outcome over compounding assumption upon assumption:
but what God closes, no man can open … 🤨 . We shall see how the PT5862 performs. |
Have been busy..., but managed to make some progress...
- Exhaust manifold prep'd and installed. . https://cimg7.ibsrv.net/gimg/www.rx8...a0e4d6bdbf.jpg |
Well, it's been stop & go. Had an ornery oil injector snap on insertion. Got it installed after ~a week delay awaiting delivery of it's replacement.
Started to install the oil injector vacuum manifold, and ...one of the small nipples snapped. Evil. Simply evil. Gotta love it... the joys of working on a car more than a decade and a half old. But she's still so much fun. :yesnod: So, ... new little vacuum manifold on order. More patience. More golf.... :) EDIT: Much preferred this vacuum manifold break now ...than to have had a nipple break unknowingly ...buried under the UIM ...during normal operation. https://cimg1.ibsrv.net/gimg/www.rx8...a88e3dcbb9.jpg Ornery oil injector . https://cimg9.ibsrv.net/gimg/www.rx8...037139fedc.jpg New oil injector received and all injectors installed. . https://cimg2.ibsrv.net/gimg/www.rx8...b9b5bed042.jpg Evil oil injector vacuum manifold . |
Progress slow w/ current work load..., but steady. Installed:
- Oil injector vacuum manifold & hose assembly - Primary, secondary & auxiliary fuel injectors - Main harness - LIM https://cimg7.ibsrv.net/gimg/www.rx8...169ea28452.jpg . . https://cimg6.ibsrv.net/gimg/www.rx8...2f1fe46be1.jpg . . https://cimg5.ibsrv.net/gimg/www.rx8...3a881149ba.jpg |
Update:
- First trial fit & course clocking of the new turbo. - oil filler & reservoir - UIM (lower section) - alternator . https://cimg8.ibsrv.net/gimg/www.rx8...48e541241e.jpg . https://cimg9.ibsrv.net/gimg/www.rx8...151e274ad3.jpg . https://cimg0.ibsrv.net/gimg/www.rx8...89721ce399.jpg . |
Update:
Made good progress on the reinstall today: - installed the turbo oil feed & drain - Finished turbo clocking and mounting for reinstall - Installed oil filter pedestal and cooler line - installed engine in bay (rarely easy ...smh) Next up: - dressing the engine bay - reinstalling the down pipe & WG - noodling ideas to transition from my 8" back to my 12" IC, ... mounting it high enough to allow adequate ambient airflow underneath to the rad, w/out completely frankensteining my crash bar. https://cimg0.ibsrv.net/gimg/www.rx8...66e9e07325.jpg . https://cimg1.ibsrv.net/gimg/www.rx8...1b88f8cfcc.jpg . https://cimg2.ibsrv.net/gimg/www.rx8...65f04b2297.jpg . https://cimg3.ibsrv.net/gimg/www.rx8...8e9fa4ea47.jpg . https://cimg4.ibsrv.net/gimg/www.rx8...a6353b0c11.jpg . |
I've run a few different IC configurations hoping to find an optimial balance between IAT and ECT performance.
- 1st config: 12", FMIC config (w/ 13 cooling rows open to ambient flow) - 2nd config: 12", reverse v-mount config w/ splitter (w/ 17 cooling rows open to ambient flow, but laid flat) - 3rd config: 8, FMIC config ( w/ 12 cooling rows open to ambient flow) New / current config: 12", FMIC config (w/ 17 cooling rows open to ambient flow). The IC w/b mounted as high as possible to allow as much air flow underneath the IC directly to the rad as possible. I anticipate good IATs, but ECTs w/ this config are TBD. Intercooler config evolution: 1st config. https://cimg4.ibsrv.net/gimg/www.rx8...db182f6eaf.jpg 12" (w/ 13 cooling rows open to ambient flow) . 2nd config https://cimg4.ibsrv.net/gimg/www.rx8...6a6a631640.jpg 12" (w/ 17 cooling rows horizontal to ambient flow, in reverse v-mount config w/ splitter) . 3rd config. https://cimg2.ibsrv.net/gimg/www.rx8...ecc41dead.jpeg8" ( w/ 12 cooling rows open to ambient flow) . New / Current config. https://cimg3.ibsrv.net/gimg/www.rx8...dc5e2019f8.jpg 12" IC, (w/ 17 cooling rows directly open to ambient flow.) . |
Nice work showing all those Curtis. Care to show some numbers and comments about success or otherwise of each iteration?
I've gone through a similar learning curve leading to my latest setup. |
Originally Posted by Brettus
(Post 4947602)
Nice work showing all those Curtis. Care to show some numbers and comments about success or otherwise of each iteration
I've gone through a similar learning curve leading to my latest setup. |
Progress update:
Continued steady progress, but discovered an issue as well. Installed: - Down pipe - WG (w/ 1.5# initial break-in spring) - AC Compressor - Plugs, Ignition coils & harness - Successfully pressure tested the fuel injectors and rails :icon_tup: However, when inspecting couplers I discovered an issue I need to resolve with my passenger motor mount bracket. This is not "new" ... I just didn't deal with it, :pat:, , when first discovered back in 2018. Edit: The bracket is at the machine shop. The horizontal is being lowered 0.5" on the vertical to create clearance for the comp. inlet coupler. I'll shim the driver side motor mount an equal amount to keep things leveled off, if req'd. v v Current Status of bay... https://cimg7.ibsrv.net/gimg/www.rx8...ce0b461dfd.jpg . Passenger Motor Mount bracket issue: does not provide enough clearance for comp. inlet coupler. https://cimg7.ibsrv.net/gimg/www.rx8...f729e63f34.png . Pic w/ pinched coupler from 2018 when first noticed https://cimg8.ibsrv.net/gimg/www.rx8...ce783e6a6e.jpg . ...resultant coupler today. https://cimg9.ibsrv.net/gimg/www.rx8...d3bb148a2e.jpg |
Like I keep posting; the solution is to get rid of it, but I’ll save it for another day.
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Originally Posted by TeamRX8
(Post 4947684)
Like I keep posting; the solution is to get rid of it, but I’ll save it for another day.
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the factory engine mount and bracket.
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Originally Posted by TeamRX8
(Post 4947692)
the factory engine mount and bracket.
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I can assure you that it’s not me who isn’t seeing it for what it is, but saved for another day.
All I mean by that is it’s still based on the OE type design and I’m well familiar with what you have. It likely won’t click until observed with a fleshly eye … . |
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