Good safe place to start with base timming ?

13.5 compression with cast Iron dove-c heads hyd flat tappet cam .610 lift on both intake and exhaust .duration @.050 is 260 intake and exhaust 110 lobe separation 3600lbs car victor intake 950cfm carb long tube headers and no mufflers.
4500 stall c6 trans 4:11 gear 28" tall tire . idle is 1100 rpm fuel PSI is 7.5

Where should I start with base timing for TNT ? Thanks

30 total

Well started working on setting the timing and this thing kept advancing the timing ! ?

34* total.should endup close to that.

Which advance springs would be recommended for the mechanical advance. MSD distributor ? Thanks

whitefield wrote:Which advance springs would be recommended for the mechanical advance. MSD distributor ? Thanks

Most of the time I try to start out with the two blue springs and the shortest bushing, black isn't it? But if you're racing it and you're not going to lock it out I would put in the skinny plain springs.

I just installed the 2 blue springs and the stock advance bushing !

Like Dave said,the light ones.

No springs and lock it out it's a freaking race car not a grandma grocery getter.

dfree383 wrote:No springs and lock it out it's a freaking race car not a grandma grocery getter.

you are right !

bbf-falcon wrote:Like Dave said,the light ones.

I put what I had I could only find one silver spring !

The lighter springs did help a lot initial timing is at 12 and advance is around 36. Starting it is better to but still seems kind of slow?
will 110 octane be sufficient for this set up or do in need to buy higher octane ? Thanks

What starter do you have?

whitefield wrote:The lighter springs did help a lot initial timing is at 12 and advance is around 36. Starting it is better to but still seems kind of slow?
will 110 octane be sufficient for this set up or do in need to buy higher octane ? Thanks

Check the plugs

gmsmkr wrote:What starter do you have?

New high torque starter ! Factory style !

bbf-falcon wrote:

whitefield wrote:The lighter springs did help a lot initial timing is at 12 and advance is around 36. Starting it is better to but still seems kind of slow?
will 110 octane be sufficient for this set up or do in need to buy higher octane ? Thanks

Check the plugs

Ok I will do that tomorrow . I have the autolite with the cut back strap . What spark plug do you recommend ?

He's saying look for indications of detonation, or the forwarning of such. Illuminated 10x magnifier, look for black specs that look like pepper on the ceramic insulator. If there, need better octane and or less timing.

kim wrote:He's saying look for indications of detonation, or the forwarning of such.  Illuminated 10x magnifier, look for black specs that look like pepper on the ceramic insulator.  If there, need better octane and or less timing.

10-4 I was just wondering if Rick had a better plug in mind . Thanks

I am sure there will be some detonation signs as the timing was way off to start with ! That be my fault

The safe timing TNT tune is there... in the ballpark, run her like you stole her, and don't shy away from adjustments, bring some plugs and pay attention to everything...JMO but every time I adjust the timing I would look at the carb together they will rock.

Agree.  Its a package.  Add fuel, add timing.  Decrease fuel, decrease timing.  One without the other, on a good day the car slows down; on a bad day it costs an engine.

It's hard to believe what just 2* one way or the other sometimes means in ET/Hp.

Here are some pics of my spark plugs , all 8 look the same. let me know what you think

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Through some new ones in, do a WOT run.  Those plugs a fat fuel contaminated.

Yeah that's what I was my thoughts . Thanks for the help !

One more question this thing is still hard to start I have a MSD 6AL box and a new high torque starter that is
For a 95 460 truck. New battery good ground and correct size battery cables . The thing sounds like an old chubby with the timing to advanced. Thanks

Have you bothered to make sure your timing marks are correct