04-3 springs and pressures

[jhucks03]

What do you recommend for this cam? Fairly fast track.

 

[bullet power]

35 nose int 34 nose ex dont worry about seat and put the timeing to it

 

[jhucks03]

It's got 1400hd in it now. What spring would you prefer?

 

[DLR engines]

the 1400 hd is a good spring do you know your installed height?

 

[jglenn]

we always ran 21/19 seat with the Williams HD springs.


try different timing with it.. 26 or 30.. one will work

 

[CarlsonMotorsports]

What Jimmy said -- I'd lean towards 29.5-30* ignition timing -- sometimes even more! Make sure you've got a real good flowing carb, or the thing won't turn up. If you've got a good car, twist the snot out of it and it will make nice usable power at high rpm.


--
Thanks and God bless,
Brian Carlson
Carlson Racing Engines
Vector Cuts
www.CarlsonMotorsports.com
Celebrating 25 years of service to the karting industry
765-339-4407
bcarlson@CarlsonMotorsports.com

 

[jhucks03]

Thanks for the help.

 

[Alan Overfelt]

When you guys talk about ignition timing are you talking about the in the hole method or with a timing light?

 

[jglenn]

mine always reference in the hole for a Fhead

actual timing by light is generally a tad less

 

[CarlsonMotorsports]

That's right Jimmy. It also depends on what rpm you check the timing at as well. I record timing at 4000 (right near peak torque) because I think that's most critical. Higher rpm will reflect less ignition timing due to coil retard. It's interesting to know how much retard the coil you are using has (especially in high rev engines.)

My reference in my above post was static timing on the bench. I always check it "in the hole" method, but the degree wheel will reference the same point on the bench.

 

[Alan Overfelt]

With a light it will be around 2-6 degrees less.