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| stadic_pacer |
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Age: 36 Posts: 89 Joined: 30th Jan 2009 Ride: EF Injected Gas T5 Convert Location: Trafalgar |
hi all
i need a some help with a diff ratio for my falcon its a ef with a mild sports mod engine wade cam 2000-5500rpm and a EA 5 speed conversion with the standard 3.08 auto diff. At 100km/h its sits on around 2000rpm at 110 is about 2200 which is fine for me doin highway work but its a bit of a slug around town i would like somethin in the middle a lil more revs when cruising would be fine if it was nicer around the streets or maybe i need to go the other way i dont know enough about the possible ratios out there or if i need to go up or down or maybe i need to move to a EB-EL-AU 5 speed with different box gears to even it all out? any help would be good to hear Thanx STADIC |
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| TROYMAN |
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with the ea t5 a nice ratio would be either 3.27 or 3.45..
keep in mind that the ea t5 with a 3.27 diff ratio, the 1st, 2nd and 3rd is similar to a ed/ef t5 with a 3.45 ratio 1st, 2nd and 3rd.. |
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| stadic_pacer |
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Age: 36 Posts: 89 Joined: 30th Jan 2009 Ride: EF Injected Gas T5 Convert Location: Trafalgar |
so you would say 4th and 5th would go up or down in revs when cruising? atm 4th at 60km/h is a bit low in the revs and same with 5th at 80
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| TROYMAN |
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a 3. 27 or 3.45 ratio will give you slightly higher revs when cruising but also give slightly better acceleration..
eg,...with 3.45 ratio you would be at about 2400 rpm at 110 .. instead of the 2200 its at with the 3.o8 ratio |
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| ef_falcon_95 |
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My el 5speed has 3:45 (from factory) it's quick off the line, very zippy and good on the highway at 100 km/h I sit on 2300Rpm (give or take)
_________________ El XR6 Turbo |
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| stadic_pacer |
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Age: 36 Posts: 89 Joined: 30th Jan 2009 Ride: EF Injected Gas T5 Convert Location: Trafalgar |
my main problem is that i hav a ea box which has different gearing to the others as follows
3.2&3.9 4.0 1st 3.50:1 3.25 2nd 2.14 1.99 3rd 1.39 1.29 4th 1.00 1.00 5th 0.78 0.72 if someone can do the maths and tell me what the end rev/speed rate is for the 3.23-3.27-3.45 would be to give me a defined answer that would help i only want to do this once if it means goin and buy a new gear so i would like to be fully informed STADIC |
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| efxr6wagon |
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Assuming 100kmh at 2000rpm in 5th on your EA box with 3.08 gears, you should see 2090rpm with 3.23s and 2240rpm with 3.45s at the same speed.
5500rpm should give the following (theoretical) kms in the gears: gear 3.08 3.23 3.45 1 61 59 55 2 100 96 90 3 155 147 138 4 215 205 192 5 275 263 246 Hope this helps.
_________________ 95 EF XR6 wagon, 17" FTRs, DBA rotors, KYB/Koni, AU bottom end, ported EF head, backcut valves, SS Inductions, Territory intake, 10.2 CR, Auckland 1258 cam, vernier gear, PH4480 headers, no cat, Tickford 2.5", 2800rpm stall, J3 chip |
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| stadic_pacer |
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Age: 36 Posts: 89 Joined: 30th Jan 2009 Ride: EF Injected Gas T5 Convert Location: Trafalgar |
thanx this does help alot now just hav to work out which one would suit my needs best i do alot of hwy work mostly 100km/h but then a bit also around town nick down the street and back
thanx again STADIC |
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| krisisdog |
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Just grab a 3.45 from an XR6. easy.
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