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Youngblood
06-04-2010, 12:03 PM
so im running my marauder this sunday at english town. im competing in the modern muscle class. im borrowing a pair of nitto drag radials from a friend of mine. they are off his 04 cobra 315/35/r17. i already test fit them and they will fit with no problems. and yes i do know the huge size difference between those and stock. the reason im going with these is because the smaller size will help bump up my gear ratio. im running stock gears so i need somethng to get me up and out

so my question is im running a lidio 355 tune. i also have his 410 tune ready to go on my x3. would it better to run the 355 tune or a 410 tune with these tires. after my calculations with the new tires ill end up with a 3.96-1 ratio. so im curious what tune i should run with to get the best time out of the car

oem diameter is 28.61
cobras with drag radials 25.68
ImpalaSlayer
06-04-2010, 12:15 PM
i cant answer your question but how the hell did you fit 315s?
Zack
06-04-2010, 12:17 PM
Go in your user options and change revs/mile to 785
Youngblood
06-04-2010, 12:27 PM
they fit perfect actually.. they are on 17 inch cobra rims i beleive they are 10 or 10.5. they stick out about a inch or so maybe less..but i dont have any type of clearence issues
Youngblood
06-04-2010, 12:27 PM
which tune should i use when i change the revs?
Zack
06-04-2010, 12:34 PM
which tune should i use when i change the revs?


Ill give you one guess....
ImpalaSlayer
06-04-2010, 12:35 PM
changing the revs is only going to change the speedo isnt it?
Zack
06-04-2010, 12:37 PM
changing the revs is only going to change the speedo isnt it?

The pcm will be shifting at the correct rpm, since the shift schedule is based off MPH.
musclemerc
06-04-2010, 12:50 PM
^^ Makes sense!
Youngblood
06-04-2010, 02:39 PM
so im gunna assume since my new ratio will be closer to 410s ill go with my 410 tune...with an adjusted rev/miles.........? right lol
LANDY
06-04-2010, 02:43 PM
see post #3. thats your answer
Youngblood
06-04-2010, 02:56 PM
but does it matter which tune i use?
LANDY
06-04-2010, 03:22 PM
use 3.55 tune
Youngblood
06-04-2010, 03:37 PM
cool thankyouevery one for yourhelp its greatly apreciated

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