Mods

[Ba Mustang]

The only mods I have engine wise is bore of .040, DSII and 2bbl carb.

I don't know much about the 200 and 250, but would putting 250 push rods in a 200 change anything? Trying to find a cheap mod to do while I get the mustang prepped and painted over the next couple months.

I am either going to mod my 200 or get a 331 stroker.

If I keep the 200 I am going to port the head, larger valves, direct 2bbl mount, new pistons, cam, maybe rockers, and a turbo. But the 331 stroker will also get a turbo.

 

[CZLN6]

Howdy Ba:

Q- "would putting 250 push rods in a 200 change anything?"

A- 250 pushrods at 9 5/16" will not work in a 200. The 200 pushrods are 8 5/16" long.

I'm guessing you were looking for an easy way to increase valve lift. Sorry. What 2 barrel carb are you using? Do you have adjustible rocker arms? Have you optimized your ignition advance curve and initial setting? Have you opened the gap on the spark plugs?

Adios, David

 

[Ba Mustang]

Using a HW5200, but I do have a Holley 350cfm 2bbl in my room.

I do not have adjustable rockers.

I don't know what you mean by the ignition advance curve and initial setting. First time I've heard about that stuff.

Gap is at 50 or 55. Timing is around 12* at idle.

 

[rbohm]

8) bring your plug gaps down to .045" for better reliability.

ignition timing advance curve is how much advance you get, and how fast. for instance your initial timing is set at 12 degrees btdc, as engine rpm increases you need more timing, to a point. this is done by either mechanical means, vacuum means or both as in the case of the DS ll distributor. at low rpms your engine will get most if its ignition advance from the vacuum advance system. some vacuum cans are adjustable as to how much advance you get, and how quickly it comes in. most of the time though the factory settings are just fine.

with the mechanical advance you can change the springs to change how quickly the maximum advance comes in, for most engine you want 13 degrees distributor advance, 26 degrees at the crank as distributor rpm is half that of engine rpm, and you want it all in by 3000rpm. take that 26 degrees and add the initial timing of 12 degrees and with the vacuum advance disconnected you should see 40 degrees of total timing at 3000 rpm. the way to change the mechanical advance is to remove the plate where the pick up for the electronic ignition sits, and change the springs on the advance weights to lighter ones.

 

[Ba Mustang]

It is reliable with the gap it has, but next time I mess with it I will lower it to 45.

 

[rocklord]

A quick, but not cheap, mod is to change out the rocker arm assemblies from the stock 1.5 ratio to a 1.6 ratio. This would be like swapping out the stock cam with a higher lift one. Read this Tech article from CI:

http://classicinlines.com/rocker_options.asp

CI has 1.6 and 1.65 ratio rocker assemblies here

http://www.classicinlines.com/products.asp?cat=38

Any of these assemblies could be installed on a stock engine, and later swapped over to a rebuilt engine with a hipo cam.

Hope this helps.

 

[Stang67]

It is reliable with the gap it has, but next time I mess with it I will lower it to 45.

I thought u sold ur mustang