Engine 6.80 pushrods?

JungleJoe · Aug 31, 2020

anyone in here ever have to use 6.80 pushrods in a stock block 302 with twisted wedge heads?
Just seems a.little odd.. especially with milled heads and a .035 headgasket

HemiRick · Aug 31, 2020

that narrow sweep right in the center is perfect. if takes a 6.8 pushrod to make this happen that what it needs

JungleJoe · Aug 31, 2020

Well..6.75 is with a solid lifter..then I add .050 to compensate for the lifter compression, if I understood that right..?

HemiRick · Aug 31, 2020

yep sound right

JungleJoe · Sep 1, 2020

10-4. Thanks

Mustang5L5 · Sep 2, 2020

I’m using 6.800” with TW heads

I measured 6.750” for the right pattern and added 0.050” for the lifter conpression

JungleJoe · Sep 6, 2020

Mustang5L5 said:
I’m using 6.800” with TW heads

I measured 6.750” for the right pattern and added 0.050” for the lifter conpression

Good to know.Are your heads milled lt stock? Did you happen to measure like I did or a different way?
And where did you get them form

Mustang5L5 · Sep 6, 2020

My heads are untouched. Out of the box. I measured for all the sizes around 6.750”. I did 6.700 through 6.850”. Mine seemed to measure around the same for 6.750” and 6.800 so I went with the larger size.

ive has reputable engine builders tell me the lifters “pump up” at higher rpm, and others tell me the pushrods bend slightly making them slightly shorter.

JungleJoe · Sep 8, 2020

Well, I ordered 6.80.. so hope it works out

JungleJoe · Sep 10, 2020

So they came in.. they are diffent lengths.. what do yall think about this..from 6.812-6.816

Mustang5L5 · Sep 10, 2020

I never measured mine unfortunately, just slapped them in.

I found this method on how to properly measure ball end

How To Measure Pushrod Length And Optimize Valvetrain Geometry

Incorrect pushrod length puts unwanted stress on the valvetrain and leaves power on the table. Here's how to correctly measure pushrod length to optimize your engine.

blog.trendperform.com

In this case, measuring the actual length of a pushrod needs to be accurate. Trend suggests a procedure that requires finding a pair of washers with 0.140-inch inside diameters. These are necessary to accurately place the measurement point at the 0.140-inch radius of the pushrod tip. Using an appropriate length dial caliper, measure the overall length of the washers and pushrod. The combined thickness of the two washers is subtracted from the gross length to determine true pushrod length.

JungleJoe · Sep 10, 2020

Thanks..Ill give it a shot..called Summit..they are over nightingale another set..so we'll see

Engine 6.80 pushrods?

JungleJoe

I was like well chit..Im missing something

Attachments

HemiRick

I'd be looking at jacking under the house

JungleJoe

I was like well chit..Im missing something

HemiRick

I'd be looking at jacking under the house

JungleJoe

I was like well chit..Im missing something

Mustang5L5

That is…until I whipped out my Bissell

JungleJoe

I was like well chit..Im missing something

Mustang5L5

That is…until I whipped out my Bissell

JungleJoe

I was like well chit..Im missing something

JungleJoe

I was like well chit..Im missing something

Attachments

Mustang5L5

That is…until I whipped out my Bissell

How To Measure Pushrod Length And Optimize Valvetrain Geometry

JungleJoe

I was like well chit..Im missing something

Similar threads

Engine 6.80 pushrods?

I was like well chit..Im missing something

Attachments

I'd be looking at jacking under the house

I was like well chit..Im missing something

I'd be looking at jacking under the house

I was like well chit..Im missing something

That is…until I whipped out my Bissell

I was like well chit..Im missing something

That is…until I whipped out my Bissell

I was like well chit..Im missing something

I was like well chit..Im missing something

Attachments

That is…until I whipped out my Bissell

I was like well chit..Im missing something

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