Thread: Cam install, so many misfires TCC wont lock

the stock spring would have to broken, or so worn out. looks like it only hit one time.

and judging by the pitting on the valve its not been sealed right for a long time.

maybe you or the last owner over reved the hell out of it one time and caused that, hard to say really.

you could try lapping compound see if it makes the valve and seat mate up again.

my valves were pitted up from sitting, heads came from a jy engine.

before lapping. they all looked about this bad.



after lapping.



valve seats before.



and after.



if the valve is bent you'll know it while lapping it, never know, lapping might save ya from the shop. its worth a shot for 10 bucks for the lapping compound.

Definitely worth a shot, how will I know if it seals or not?

install valve and spring and fill the chamber up with some kind of fluid see if it leaks

you spin the valve in the head with the compound between them, if its bent one part wont get touched by the compound and you'll see that for sure.

mine didnt leak at all. i installed my heads with the stock springs, then swapped my good springs and rockers. they all sealed up nice when i put compressed air to them.

When I pull the valves to lap them do I need to keep them in order?

no, mine are all in a sandwich bag

Opinions on zzps ported and aluminum heads?

GOT MONEY TO BURN? not cheap at all.

Their stage 3 iron heads flow more, according to zooomer.

Originally Posted by GTPpower

Their stage 3 iron heads flow more, according to zooomer.

Where's the flow data ? Did the vendor(s) start posting data before / after porting?
i feel like this is gonna go back to the great Chris Hinson debacle

abbottracing heads (never heard of ANY one using their products) , has a higher flow number at .600 lift then zzp AL head, but less the Chris's heads. see where this is going ?

I don't have flow data. Just going off what zooomer told me.

So stage 3 over aluminum? Going to weigh out what it will cost to get the heads back into running shape when I get a quote.

What cam are you going with?

for about a 100 in tools you can port your own like i did. its just time, lots of time you need to invest into the port work. iirc it took me around 20 hours to finish mine. i did it in 2 to 4 hour blocks of time. cause after the first hour you like damn this sucks, but theres no turning back once you start.

or ask your local shop what they would charge. im sure they would be cheaper then zzp.

http://www.grandprixforums.net/threa...-Porting-Guide this is the how to i followed. my heads had all the same casting marks to a T.



work in progress



this will always be my fav pic, its not even polished yet, just ground out with the carbide bits. note all the grindings on the table. thats not counting whats been blown off lol

Originally Posted by GTPpower

I don't have flow data. Just going off what zooomer told me.

So you will believe what zoomer told you about heads but not about headers?
Interesting .....

Originally Posted by 94GrandPrixSE

So stage 3 over aluminum? Going to weigh out what it will cost to get the heads back into running shape when I get a quote.

Dude, trust me - do your homework. Do research , google etc and come with your own opinion of which is best for you.

Originally Posted by GTPpower

I don't have flow data. Just going off what zooomer told me.

Xp cam

Originally Posted by CrazyGuy03

So you will believe what zoomer told you about heads but not about headers?
Interesting .....

He never told me anything about headers.

Originally Posted by 94GrandPrixSE

Xp cam

Skip the aluminum heads then. Not worth it. Xp is great on stock heads. You'll obviously pick up some, but not as much. You need a bigger cam to get more out of the heads. I wouldn't even get ported heads for the xp. You can make more hp/ $ elsewhere.