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Author F15 and F13cr
gez bay
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Registered: 14th Feb 08
Location: South Wales drives: Vxr
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11th Jul 09 at 19:36   View User's Profile U2U Member Reply With Quote

would you notice any difference from changing from a f15 to a f13cr (close ratio)?

pros and cons in doing so?



[Edited on 11-07-2009 by gez c16b]
gez bay
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Registered: 14th Feb 08
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11th Jul 09 at 20:17   View User's Profile U2U Member Reply With Quote

no one?
am4nf
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Registered: 27th Jul 08
Location: South Ayrshire Drives: Corsa Sport
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11th Jul 09 at 20:18   View User's Profile U2U Member Reply With Quote

id like to know this also, im guessing better acceleration but lower top end?
Kenzie
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Registered: 16th Sep 07
Location: Burnley
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11th Jul 09 at 20:23   View User's Profile U2U Member Reply With Quote

Ive been thinking the same too
Ollie_B
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Registered: 1st Jun 08
Location: North Wales/Wirral
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11th Jul 09 at 20:25   View User's Profile U2U Member Reply With Quote

I think the acceleration would be quicker and the top end less like said, but also wouldn't the f13 take less torque? Therefore not last as long, and put a limit to engine modifications?

[Edited on 11-07-2009 by Ollie_B]
gez bay
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Registered: 14th Feb 08
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11th Jul 09 at 20:28   View User's Profile U2U Member Reply With Quote

wouldnt have thought it would put a limit to anything, and would have thought its as strong as the f15
Ollie_B
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11th Jul 09 at 20:31   View User's Profile U2U Member Reply With Quote

Doesn't the 13, 15, 23 etc stand for ft/lb thats what i heard anyway? i.e f13=130 ft/lb
gez bay
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Registered: 14th Feb 08
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11th Jul 09 at 20:41   View User's Profile U2U Member Reply With Quote

not sure about that
Kenzie
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11th Jul 09 at 20:45   View User's Profile U2U Member Reply With Quote

Nah i think its just to do with the ratios.

Not heard anything about the torques before mate.
Ollie_B
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11th Jul 09 at 20:50   View User's Profile U2U Member Reply With Quote

Ahh scrap that then lol
Twiggy
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Registered: 15th Oct 04
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11th Jul 09 at 21:07   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by Ollie_B
Doesn't the 13, 15, 23 etc stand for ft/lb thats what i heard anyway? i.e f13=130 ft/lb



9.99999999% thats right!
dean101287
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Registered: 22nd Jul 07
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11th Jul 09 at 21:11   View User's Profile U2U Member Reply With Quote

do you mean 99.999999? I have also heared its a tourqe rating
Twiggy
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11th Jul 09 at 21:15   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by dean101287
do you mean 99.999999? I have also heared its a tourqe rating


yeh 99.9999999999999999 have also heared its a tourqe rating
gez bay
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11th Jul 09 at 21:20   View User's Profile U2U Member Reply With Quote

so it wouldnt last on a car with over 130ft/lb?

[Edited on 11-07-2009 by gez c16b]
Twiggy
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11th Jul 09 at 21:21   View User's Profile U2U Member Reply With Quote

nahhhh dont think so..... hence why people who put f16's on xe corsas blow em up....
gez bay
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11th Jul 09 at 21:25   View User's Profile U2U Member Reply With Quote

right so my next question is. im sure ive heard someone say you can get a f15 close ratio?
Twiggy
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11th Jul 09 at 23:45   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by gez c16b
right so my next question is. im sure ive heard someone say you can get a f15 close ratio?


when bolted to F20 will be........
Warren G
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Registered: 14th May 06
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12th Jul 09 at 08:58   View User's Profile U2U Member Reply With Quote

F13 and F15 are pretty much the same

early F13's were geared lower

later had same ratio's bar 3rd i belivie
shaunmods
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Registered: 12th Mar 07
Location: Glascote, Staffordshire
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12th Jul 09 at 09:03   View Garage View User's Profile U2U Member Reply With Quote

Doesnt Broster run an F13 on his?
gez bay
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Registered: 14th Feb 08
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12th Jul 09 at 09:10   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by Warren G
F13 and F15 are pretty much the same

early F13's were geared lower

later had same ratio's bar 3rd i belivie


its 3rd thats made me want to change the gearbox, the revs drop down too much, everything else is good

 
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