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Dutch924-racer
Joined: 23 Jul 2007
Posts: 1077
Location: The Netherlands
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 Posted: Fri Mar 08, 2019 5:36 am Post subject: Quicker steering rack, use a 944 powersteering rack ? |
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For track use I am looking for a quicker steering rack form my 931.
I saw that some 944 guy's use a 944 powersteering rack and delete the pump, etc.
Is the worth the effort ? (I know I need to relocate the brackets)
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937 trackday car
Series 2 engine
951S turbo and intercooler
Fast road camshaft
Forge recirculation valve + boost controller |
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Fasteddie313
Joined: 29 Sep 2013
Posts: 2596
Location: MI
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| Posted: Fri Mar 08, 2019 6:16 am Post subject: |
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https://pitstopusa.com/i-5080741-howe-steering-quickener-1-5-1-ratio.html?utm_source=google&utm_medium=cpc&scid=scplp5080741&sc_intid=5080741&gclid=Cj0KCQiAn4PkBRCDARIsAGHmH3cS57oY6TYyEB7-SQpQ7IJdVWu80xy3V8pbpJSpKkdt9eNMP9eSBtcaAodsEALw_wcB
https://www.speedwaymotors.com/Speedway-Black-Small-Body-2-1-Steering-Quickener,138447.html?sku=91032221&utm_medium=CSEGoogle&utm_source=CSE&utm_campaign=CSEGOOGLE&gclid=Cj0KCQiAn4PkBRCDARIsAGHmH3cdWRmUqemBK5qhNaA3KnjZpvqUo-oYcByI0YRWSco7q6OYOUYfFAoaAoV4EALw_wcB
http://www.colemanracing.com/Steering-Quickeners-P4753.aspx
????????????????
What would 1.5:1 or 2:1 give us after the math?
| ideola wrote: | From the Tech Specs booklet:
924 all markets / 931 US+Canada+Japan
Steering ratio: 19.15:1
Turning circle: 10.08 m
Track circle: 9.21 m
Turns, lock to lock: 4.02
931 ROW (option for US+Canada+Japan)
Steering ratio: 22.39:1
Turning circle: 10.3 m
Track circle: 9.5 m
Turns, lock to lock: 4.02
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Ok it looks like their are only 2 924 racks.. 22.39:1 and 19.15:1
22.39:1 + 1.5:1 = 14.92
or 11.2:1 with a 2:1 quickener..
I think our 931s have the 22.39 boxes
How does a 15:1 steering ratio sound?
Or with the 19.15 ratio rack you get 12.77:1 or 9.58:1 after a quickener box..
Final options =
9.58:1
11.2:1
12.77:1
14.92:1
19.15:1
22.39:1
Sound like some pretty good options to me. How do those ratios sound to you? I don't know what the preferred ratio would be honestly..
Putting a quickener box in the middle of the steering shaft sounds like the easiest and least intrusive path to quicker steering to me..
Then, after you made 1, you could swap racks and quickeners easily just bolt on style to change between all of those options whenever you want. Just swap in the different quickener or rack with no fab work..
All of this trying to use the wrong rack, a depowered power steering rack at that, making all those mounts, making tierods, making a steering shaft anyway, nah..
Prolly cheaper too..
""""
E92 M3: 12.5
Alfa MiTo: 13.1
RS4: 13.1
2010 Mini S: 13.2
Evo X: 13.3
C63: 13.5
Civic Si: 13.6
MR2 Spyder: 13.6
E46 330i ZHP: 13.7
S2000 CR: 13.8
Mini S: 14.1
Z4 sDrive35i: 14.4
E46 M3 CSL: 14.5
E46 M3 ZCP: 14.5
E39 M5: 14.7
Cayman S: 14.8 (also saw variable ratio rates quoted at 13.8-17.1)
S2000: 14.9
2010 Miata: 15.0
NB Miata: 15.1
E46 M3: 15.4
Z3: 15.4
Z4 M: 15.4 seems to be the consensus, although I also saw 14.7 and 13.7 for the roadster and 12.8 for the coupe...
E36 M3 3.2 Euro: 15.6
VW R32 MkIV: 15.6
Elise SC: 15.8
335i: 16.1
RX8: 16.4
Solstice: 16.4
E36 M3 3.0 Euro: 17.6
Z3 M: 17.8
E39 5-series: 17.9
"""""
Comparisons
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