Goodson Tech Bulletin Board

have a set 351 daoe heads standart rebuilt .060 over block the cam of cutomers choise is a com hyd flat tappet part #35-234-3 the int valves are 1.74 how big should I go with the int and the ex valves how much should I resurface off what are the part # for the seats and valves what do you recomend for rockers and ratio the carb is a 650edelbrock vac secodarys with a spread bore this is goig in a street truck thanks T.R

Hi we are a uk based atv/mc shop we have at present a neway kit 375/298 pilots but need to fit valve seats more often now we have a bridgeport mill r8 what do need for counterboring seats all metric 23mm to45mm 4mm stems to 6mm stems
yours
Paul Gowland

what is the installed stem height for 455 olds "j" head?

hi I was just wondering what the best and most economical way for me to machine the seats for oversized valves on my dirt bike?

I have a older K.O Lee seat grinder what gringing stones should I use to clean-up pitted seats on the IH Cub tractor with the C60 engine?

Thanks Glenn

Does anyone know of an epoxy(used for reshaping) that can be used on aluminum intakes and or ports? I have tried devcon and moroso. Niether worked.
Thanks for any replies.

sorry to ask but what does the term back cut mean is it another angle after of before the 45 degree seat face
regards Roy [ uk]

i see the below posted a while back

Typically a backcut valve will hurt the wet flow of both race and street engines. The best thing to do is find a valve that has the proper seat width without a back cut.

Joe- On a fully ported head what type of seat cut makes the most power- a cut using a multi angle cutter or several single angle cuts. Is the difference really that great? Building a streetstrip type engine and don’t need every last hp.
Thanks

What cutters would I use on an 05 Harley twin cam
intake and exhaust seats for good air flow?
Intake has 1.94" valve
Exhaust – 1.610 valve
Mild Port job
.510" cam lift.
Thanks.

Joe
Do you have any suggestions on a multi angle cutter for this particular head on both the intake and exhaust. There has been little port work done and is used on an economy modified 2WD truck puller engine. The engine is a 460 bored .080". Any suggestions would be greatly appreciated.