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#1
28-12-2005, 18:42
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top speed
what is the s12 geared for and will the s13 diff alter the gearing, what would mine be capable of at 6800rpm with 340bhp on 225/45/17's,come on martin this ones for you, serious answers though people.
__________________
 fj20/et a replacement for displacement 
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#2
28-12-2005, 18:54
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The S13 diff doesn't alter the gearing.
Providing an engine can pull to 6.8k in 5th with 225/45/17's the top speed will be: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172.2mph 
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#5
28-12-2005, 20:51
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i know that ken did a 137mph at elvington, not sure of his bhp at the time, he got about 2mph more than alan spensley who has a rb25 with exhaust and filter, i just wanted to give it a run before i take the engine out for good.
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fj20/et a replacement for displacement
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#7
29-12-2005, 00:30
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how do you work that top end of 172 mph out...???
intresting to see what a s13 lump pushing 350bhp + 50 (75 poss) shot of nos will achive, standard gear box & diff (uprated clutch & lighten fly)... hhmmmm
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if it's got tit's or wheels, it's gunna give you grief.!
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#9
29-12-2005, 04:02
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Quote:
 Did you??? i remember taking it to 5 and you said you gota take it further than that. You always said to me i have to take mine to 6 atleast
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 Currently 226.4bhp@13psi with a remap to 18psi coming very soon 
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#10
29-12-2005, 04:37
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I'm talking about you driving it in 5th gear numpty, when you drove it you took it just past 6k in 5th. In any other gear it has to be taken to 6.5k without a doubt (and you did). It leans off after 6, thats why I got ya to let off. 172mph was worked out using the gear ratios etc. 7.2k on 215/40/17 would be 174mph providing it could pull to that rpm in 5th.
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