timing setting

pjfasty

Newbie

Posts: 15

timing setting

« on: May 07, 2010, 18:08:07 pm »

Hi folks, what timing setting would you set a 10:5:1 compression engine at max advance?
Cheers PJ.


	Logged

Hero Member

Posts: 1628

Re: timing setting

« Reply #1 on: May 07, 2010, 18:50:52 pm »

I´d try 30 degrees total. Nothing beats a dyno session though...


	Logged

Signature.

TexasTom

Hero Member

Posts: 1518

12.58@106, 7.89@89 Texas Motorplex 10/18/09

Re: timing setting

« Reply #2 on: May 07, 2010, 20:12:37 pm »

I agree 30-31 total with good fuel/pump gas.
I run 10.55:1 with 31.
What cam and what is the weight?
Lots and lots of variables ...


	Logged

Work, work, WORK!

Modesty accepted here ...

james wotton

Full Member

Posts: 144

Re: timing setting

« Reply #3 on: May 07, 2010, 20:49:31 pm »

dyno the only way to find out for sure, but around the 30/32deg for 98octane


	Logged

9.91 @ 139.90
outlawflatfour 2010 and 2011 champion.

Diederick/DVK

Hero Member

Posts: 3692

They're never done till they're sold

Re: timing setting

« Reply #4 on: May 07, 2010, 20:57:50 pm »

could anyone explain the reasoning behind this?

nevermind


« Last Edit: May 08, 2010, 07:31:38 am by 67-indeed/DVK »	Logged

Diederick
-
Proud member of:
DVK ~ Der Vollgas Kreuzers

Hero Member

Posts: 1628

Re: timing setting

« Reply #5 on: May 07, 2010, 21:41:00 pm »

Died, I have experienced some problems with "pinging" when using my mag at 32-33 degrees. (2276 11:1.) I timed the ignition static using a buzzer and the "timing card" that came with the mag from Joe Hunt. My advice would be to carefully listen to pinging and if heard back off a couple of degrees.
As I´m a real hack about these things I will not venture into explaining the theory behind my experiences...


	Logged

Signature.

Jim Ratto

Hero Member

Posts: 7121

Re: timing setting

« Reply #6 on: May 07, 2010, 23:13:37 pm »

Quote from: 67-indeed/DVK on May 07, 2010, 20:57:50 pm

could anyone explain the reasoning behind this?

i'm about to finish the build of my 1915, 9.7:1 CR which should still work with euro 95, and i'll be running a locked magneto. i was thinking 32 degrees...

good luck starting it.


	Logged

dyno don

DKK
Sr. Member

Posts: 327

DGVA DZK (old school 70's)

Re: timing setting

« Reply #7 on: May 08, 2010, 01:26:36 am »

LITTLE engines love advance ie:32-36//BIG engines love less ie:25_32...of course there are variables in consideration especially if hemi cut where one can bend the curve with more advance. good luck..!! ditto with stella blue/starting may be aggrevating


« Last Edit: May 08, 2010, 01:37:23 am by dyno don »	Logged

pjfasty

Newbie

Posts: 15

Re: timing setting

« Reply #8 on: May 08, 2010, 14:30:26 pm »

thanks for the replies....
Its an msd dizzy, ive set it to 32 degrees at max advance which gives an idle timing at 8 degrees (smallest advance bush fitted). And worked my way up the springs till it stops pinking on acceleration (ended up with one heavy silver and one light silver), it starts advancing at 1350rpm.
Its a 2387cc fitted with an fk87 in a full weight type3 running on super unleaded, so do the settings ive ended up with seem ok or should the advance start a bit earlier?.
It runs cool and pulls well.
Cheers PJ


	Logged

dyno don

DKK
Sr. Member

Posts: 327

DGVA DZK (old school 70's)

Re: timing setting

« Reply #9 on: May 08, 2010, 19:06:49 pm »

congrats..!! just a matter of "fine line tweaking" from this point on. when running race fuel you will need to read the plugs with a magnifier to see down into the plug to see any results...and rememember proper plug type(use a colder plug) and correct gap with any aftermarket ignition !!


	Logged

Pages: [1]

« previous next »