Dropping pulley size...I need a retune right??

2001Snake

It will be fast one day
Established Member
Joined
Jan 7, 2010
Messages
1,680
Location
Louisiana
Hey fellas,

So to give you a rundown of what I have. It’s a 14 with a email tune from LUND to accommodate the OR/X pipe. That’s the only “power mod” I have. I’m about to drop to a 2.4” pulley for another 2-3lbs of boost to throw a little more power at it for an upcoming race. So I email LUND about adjusting the tune for the pulley and they informed me that the tune on the car will be fine with the smaller pulley and that it didn’t need changed at all. I mean I’m no John Lund but adding 2-3lbs of boost may need timing changes and for sure added fuel changes for the pulley swap right? Seems wrong to me but figured I’d ask before I melt pistons lol

Thanks!
Jay
 

Papaw

Well-Known Member
Established Member
Joined
May 12, 2013
Messages
724
Location
West Coast No Longer!
I believe what he means is that the tune he sent you already has provision for a smaller pulley and the fuel/timing needed for it.
 

Catmonkey

I Void Warranties!
Established Member
Premium Member
Joined
May 20, 2011
Messages
3,854
Location
Louisiana
The load factors in your tune have been reconfigured and the timing tables set accordingly, so if Lund says you don't need it, you're fine.
 

2001Snake

It will be fast one day
Established Member
Joined
Jan 7, 2010
Messages
1,680
Location
Louisiana
Ok thanks for the reassurance guys. Things have changed since I had my 04 cobra. I’ll go with it and do some data logging.

Jay
 

PM-Performance

Well-Known Member
Established Member
Joined
Dec 16, 2015
Messages
1,224
Location
Blandon, PA
You really don't think he knows what he is doing? lol.
You are fine. Its not like you are going from 12psi to 20psi. Timing really they keep the same until you are going over 18-19psi or changing fuel type and fuel does not change unless you dont have any.
 

2001Snake

It will be fast one day
Established Member
Joined
Jan 7, 2010
Messages
1,680
Location
Louisiana
You really don't think he knows what he is doing? lol.
You are fine. Its not like you are going from 12psi to 20psi. Timing really they keep the same until you are going over 18-19psi or changing fuel type and fuel does not change unless you dont have any.

Did I say that? I’m saying I want to double check and make sure. Maybe he misunderstood me and I just go run the piss out of it and blow up this expensive 5.8 just because I didn’t ask to be sure. I mean no disrespect towards them by questioning their statement, to be honest I just don’t want to melt pistons lol
 

PM-Performance

Well-Known Member
Established Member
Joined
Dec 16, 2015
Messages
1,224
Location
Blandon, PA
Did I say that? I’m saying I want to double check and make sure. Maybe he misunderstood me and I just go run the piss out of it and blow up this expensive 5.8 just because I didn’t ask to be sure. I mean no disrespect towards them by questioning their statement, to be honest I just don’t want to melt pistons lol

I think more of the confusion is people that think every change they do needs a tune or retune. That is why Alex makes those videos to take these questions out of the equation.
But always listen to your tuner. You pay them for this advice, you should trust it.
 

May93

Member
Established Member
Joined
Oct 10, 2012
Messages
773
Location
Ohio
A 2014 with a Pulley and off road x pipe has got to be a beast. I like my 2007 but the 2013/14 are hard to beat. I've had to mod my car just to get close to your stock power.
 

2001Snake

It will be fast one day
Established Member
Joined
Jan 7, 2010
Messages
1,680
Location
Louisiana
A 2014 with a Pulley and off road x pipe has got to be a beast. I like my 2007 but the 2013/14 are hard to beat. I've had to mod my car just to get close to your stock power.
For a very basic bolt on car it gets down. I ran a 11.23@125 with nothing but x pipe and 91 tune and a very badly slipping stock clutch lol
 

Users who are viewing this thread



Top