Mobile Mechanic

Pics can be worth a 1000 words. What brand heads,rocker arms,etc etc. If you have a smartphone you can just upload pics from it.

stangtoyho said:

Find out what size pushrods I need and adjust rockers/

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Have ya tried the Google yet? I'd bet my good knee that if you typed what size push rods do I need etc it'll get you going in the right direction.

The first thing you do is to head to the local auto parts store and buy a service manual, preferably a Chilton for your car. If you have the $$, buy a factory service manual from Helm Inc. You may need to check eBay for a used Helm manual.

EFI or Carb?
What cylinder heads?
What intake manifold?
Any MSD ignition?

If EFI, is it Mass Air or Speed Density?
If it is Mass Air what make and model MAF?
What size injectors - stock or something else.

Speed Density uses Manifold vacuum (MAP), Throttle position (TPS) and RPM, & Air Temperature (ACT) to guess how much air the engine is pulling in. Then it uses all of them plus the O2 and ECT sensors to calculate the air/fuel mixture. It is dependent on steady manifold vacuum and minimal changes in airflow from the stock engine configuration to maintain the proper air/fuel ratio. Change the airflow or vacuum too much and the computer can't compensate for the changes, and does not run well. Forget about putting a supercharger, turbocharger or monster stroker crank in a Speed Density engine, because the stock computer tune won’t handle it. Every time you seriously change the airflow through the engine, you need a new custom burned chip to make the engine run at peak performance.

Mass Air uses a Mass Air Flow meter (MAF) to actually measure how much air is being pulled into the engine. The computer uses this information and inputs from the O2, TPS, ACT, ECT, RPM and Barometric Pressure (Baro) sensors to calculate the proper air/fuel ratio. It is very tolerant of changes in airflow and vacuum and tolerates wild cams, high flowing heads, and changes in displacement with minimal difficulties. Larger injectors can be used with an aftermarket calibrated MAF or a custom dyno tune. This makes it possible to use the stock computer with engine displacements from 302-408 cu in, and make many modifications without a custom dyno tune chip. Put a new intake manifold on your 331 stroker and the computer figures out how much more fuel to deliver without having to have a new chip burned to accommodate the extra airflow.


If carb, what model carb?
What distributor?

Why do you think its the lifters? Sounds like allot of basic fox issues.. .

89oem said:

Why do you think its the lifters? Sounds like allot of basic fox issues.. .

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Who said anything about lifters?

Well pushrods, lifters and rockers, kinda go together and if it's in the pushrod grouping lifters would be a strong suspect in the weakness of the grouping, But we dont know enough yet

madmike1157 said:

Who said anything about lifters?

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I like the new avatar Mike, but the smirking portrait of yourself is priceless. You must make a signature with it. I insist..

OK, now you got it,

youre trying to figure out why the pushrod seemed loose... These guys can help you fix it right.

Stop and list everything you've done. what parts you have, photos..

They can quiz u from there...

stangtoyho said:

South of Dallas tx, called waxahachie

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One last thing before I go: Ellis Co. volunteer firefighters charged with sexual assault in hazing incident @madspeed @Noobz347 @Gearbanger 101

sorry- not going to go back and read the whole thread.

• Are these pedestal or stud rockers- pedestal normally require shims to obtain proper preload
  
• did you measure for pushrod length- changes to the top end, heads, cam head gasket thickness and other variables often dictate non stock length. stock length is 6.272" for reference .put in too long a pushrod and your valves will hang open.
• You will also need to check the swipe on the valve tips to ensure proper valve train geometry or you can wipe out parts quick