light pro May 31, 2010 02:47PM
I'm currently running a superfarm john deere and I'm thinking of changing to light pro. I'm wondering how much of my old parts will work.

How much fuel will a 540 with a 4.1 or 4.25 need?

What size injectors would I need?

Would my old 640 superfarm cam work?

What size turbo can a 540 spin??

Re: light pro June 01, 2010 05:32AM
injectors 5:25 to5:32
pump 800cc to950cc
cam could work but would have one cut or made for the 540 torque
540 turbo 3.9 or 4.1 stone dust track 4.25
good luck

Re: light pro June 01, 2010 05:39AM
Agreed with red rain.
4.1 charger seems to offer the best variety.
Get a cam for what you are doing.

Re: light pro June 02, 2010 12:27AM
You should be able to run a bigger turbo, like a 4.25, 4.3.... the guys on the east coast are running 4.4 with a-pumps and 540ci.

Re: light pro June 02, 2010 12:27AM
You should be able to run a bigger turbo, like a 4.25, 4.3.... the guys on the east coast are running 4.4 with a-pumps and 540ci.

Re: light pro June 02, 2010 02:40AM
remember that an engine is still an air pump and with an OEM head will only pump so much air. Also the 4.1 will hang in there better on a really tough track.

Re: light pro June 02, 2010 02:58AM
4.4 only sounds better on the line its at the end it counts 3.9 , 4.1

Re: light pro June 02, 2010 03:51AM
Which has more horsepower? Has anybody had on dyno? Light pro or superfarm

Re: light pro June 02, 2010 03:58AM
you must be joking right? the light pro or 4.1 class has got a couple hundred more horse than super farms easily.. light pro to me is on of the most fun classes to wacth

Re: light pro June 02, 2010 04:13AM
are we talking about light limit or limited pro big difference superfarm have thereday and limitedpros have there day superfarm torque hp limitedpro rpm hp

Re: light pro June 02, 2010 04:21AM
Lets compare the NTPA classes

Re: light pro June 02, 2010 05:15AM
a 4.1 turbocharger produces the potential air volume to make in excess of 1800hp while a 3.0 turbocharger is about maxed out in the 1250hp range

a buddy of mine changed from a 540 3X4 to a 4.1 and the powerband of the engine moved up over 1000 rpm so a camshaft change is deffinately required to take advantage of the turbo.

Re: light pro June 02, 2010 06:58AM
what clubs have this class and tell me details on rules

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