Anybody had problems with p & g check

[TOP GUN]

i had to pull a head after my engine pumped 6.5 cubic inches too big for the rules and 12 inches bigger than actual after head off check. a P & G check five years ago was accurate. differant machine!

[Lyn Smith]

new design starters and 16 volt batteries will crank them fast, and big!!!

[Jim Caughlin]

I wouldn't doubt that there could be variations between the P&G meters but my engine has always been dead on down to a fraction of an cubic inch when checked. That includes testing with both 12 volt and 16t volt starters.

Jim Caughlin
SS 6019

[ss3011]

Its important that the test is corrected for engine temperature.

[Mike Taylor 3601]

Like Lynn said if cranks too fast will pump big,had pulling customer pumped 481 with a 468
he had old delco hi torque with big dozer battery,they then pulled head and measured bore and stroke and could'nt measure stroke correctly they measured 4 1/4 so customer wanted to know if we could have ground crank wrong, no can't grind crank .010 and add 1/4 stroke,LOL ,we tested later would pump 481 could put in gear and let clutch out enough to slow cranking speed down would pump 468 then, when cranks too fast first hit of compression it blows the piston up farther than should.
Mike Taylor 3601

[Adger Smith]

My odd fire V-6 always checked big, until I started pulling all plugs and rockers and slowing it down with a 12 V-batt. Then it pumped right on. Part of my problem is I use a 142 tooth flywheel. like others have said. Temp and starter speed. The first "Hit of the puck" will usually set the ring.

[TOP GUN]

Thanks guys for the feedback.NO. 16 volt battereys { not needed to spank old chevys} don't shoot me adgar. but a 157 flxplate. 2 rockers off but pushrods sorta holding lifters n. 7 plugs left n. Tech official did comment on how fast he thought the cooling system bought temp down.Should have checked water temp quage for comparison. It seems b4 that it just stepped its way up to a reading n 2 to3 turns. This time straight up to 10 inches too big and about half inch more on the about 4 revolution. .My ford buddies {MD AP PJ} thanks guys. helped me remove a still warm head and th engine checked 3 inches smaller than the limit. but P & G protest 200$. cubic inch protest 700$ Maybe il win the next ace on the track.

[james schaechter]

Way back at Memphis, I think 1996, we were pumped after class. We had an old 316 engine with a crappy starter and 12 volt battery. It pumped 4 too big! I was shocked because I knew we were 315 and change for cubes. I asked what we had to do and they said pull a head. No problem, we can do that. Then another tech official said to hold on. They brought out another pump. It was huge. I don't remember for sure, but I think it was checking the pro stockers Anyway, it checked three cubes small on that one. LOL.

[Ed Wright]

Back when I took a few years off to race local dirt tracks, we had a tech inspector that thought he was smarter than everybody else. Anybody else ever see that? LOL
He decided that since everybody pumped an inch or so small, the temp correction used must be wrong. At bigger races they typically pumped the top 3 or 5 cars in the A feature. At a Witchita KS race, using his new calculations, all top five pumped 5 or 6 big. 360" limit. Mine finished 2nd, and was 355", (350" + .030") pumped 361". I had a fast starter, so it typically pumped 357", still legal. All five cars pulled heads, all were OK. An inaccurate temp gauge could certainly cause problems. He was not real popular over that deal. He quit using his new calcs.