42 Lightning With 540's and XR's???
 

I have my engines sitting in my garadge waiting to be torn down.
I've been bouncing around the idea of stroking them out to 540cu in.
The horsepower I'm hoping to get out of it should be around 650.
The drives are XR's with 2"Sprortmaster shorties with P5 Hydros.
I'm going to have the uppers setup by Mr.Gadgets.
Is anyone running 540's/XR's in their 42's ???
I'd like to know what kind of performance gains achieved and most
importantly how well the drives hold up.
Some folks tell me stroking the blocks will create too much torque
for the drives and others say it will be OK as long as I'm easy with the sticks
getting out of the hole(which I am anyway).
Any insite would be appreciated.
Dennis

Re: 42 Lightning With 540's and XR's???
 

i love my 540's, check out sept issue of Hot Boat. nice 42 with triple 555's with xr's running 108

Re: 42 Lightning With 540's and XR's???
 

I would think you'll be OK with XR's...
What RPM do you plan on spinning the motors at?...for 650NA/HP I would guess your looking at new heads, cams, carbs, and intakes?
It might be cheaper to do some BlowerShop 8-71's and 750 Holleys pushing 4-5psi for that HP.
Hey look what I found in my puter :drink:

Re: 42 Lightning With 540's and XR's???
 

Mark,

Presently I'm turning 5,600RPM on my 502's with Brodix plus2 heads,
cam,msd,and carb.
I'll have to go to new rotating assembly,cam,carb etc.

Might not be a bad IDEAL :D to go the blower route.

I like the pic............ :drink: had a lot of fun that day!!!

Re: 42 Lightning With 540's and XR's???
 

I have a customer that we changed the pulleys on 575's that now make about 600-615 w/ XR's and no problems @120 hrs.

Just go easy out of the whole and watch the big waves.

Re: 42 Lightning With 540's and XR's???
 

I am running Bravos on my 540's so far all good. I think XR's would be fine. Tom

Re: 42 Lightning With 540's and XR's???
 

Boost is your friend :p
Yeah I had a blast myself...can't wait till next summer.

Re: 42 Lightning With 540's and XR's???
 

hi ive got 540s in my 96 42 the make close to 750hp natrual asp. one problum is so much cam cant use silint choist and had to fab my own risers 12 in longer be couse of reversion. it is loud .... but so far no cop s bug me oarzark lake runs 90 mph 2 ft chop half tanks 2 people

Re: 42 Lightning With 540's and XR's???
 

hey 50boat
i see were you boat lake Ozark. do you keep your boat at the lake? If so what part of the lake are you on?

later

Re: 42 Lightning With 540's and XR's???
 

iam at the 25 mile marker in sting ray cove, v shape house on point , white, with train horns on roof ,, i honk at fountains... okee doikee