Who switched from 305/45r17's to 315/50r17's??

[RGPIII]

whos made the switch and what did you gain? Looking to make the switch over the winter.

 

[hellno]

I made the switch about two weeks ago and since I went ethanol I’m glad I did I’m able to hook with my most power now

 

[Marc W]

While the 305 will work on a heavily prepped track (depending on power) the 315 will give a lot more consistent leave. Especially when the prep is less than ideal. I do think the 3.09 gear may be necessary with the added diameter of the 315. That of coarse depends on how much power you’re making and how slippery the track is.

 

[hellno]

I’m considering going back to my 3.09 but I’m enjoying being able to launch it for now lol

 

[RGPIII]

Also swapping out the factory springs to the HHP demon springs. Hopefully get this thing hooked up.

 

[hellno]

I did the demon springs and the lockout kit worked well for me

 

[Hpindy]

I did the demon springs and the lockout kit worked well for me

That was great advice you got on the demon (hhp) spring and bmr lock out kit !

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[Hpindy]

whos made the switch and what did you gain? Looking to make the switch over the winter.

This is the route I will be going once my current 305's are finished .

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[hellno]

That was great advice you got on the demon (hhp) spring and bmr lock out kit !

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Yes it was indeed lol
When in Rome 👍

 

[hellno]

This is the route I will be going once my current 305's are finished .

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Your 305s are finished your already increasing your power your going to be kicking yourself if you try to hook in them next season

 

[Hpindy]

Your 305s are finished your already increasing your power your going to be kicking yourself if you try to hook in them next season

What do you mean I already increased my power ???

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[hellno]

What do you mean I already increased my power ???

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Better get the 315

 

[motorhead]

And give me your old 305s.

 

[hellno]

Really I might make you a great deal

 

[RGPIII]

My 305’s are smoked.

 

[FFBOS]

I am going to use the 315 for next season. I couldn't get the 305 to hook well with great prep. Tune was adjusted for it as well. I think it will help. We'll see how it does come spring.

 

[Mean Cat]

I wonder if the 315's will help the 60' with stock boost cars or if these are basically needed when more hp or boost is added ? …..I do have 3.09's already.

 

[FFBOS]

I think so, especially if you can leave it RPM vs idle. I could only leave slow squeeze of the pedal off idle on 305's.

 

[DRAGRCR]

whos made the switch and what did you gain? Looking to make the switch over the winter.

Just a quick note. I switched and I had high hopes. But if the Track is crap, well then the track is crap. The 315's will not hook.

 

[FFBOS]

Just a quick note. I switched and I had high hopes. But if the Track is crap, well then the track is crap. The 315's will not hook.

They will give you a better chance than the 305's no doubt though with "marginal" prep.