DAPSUPRSLO

iTrader: (14)

Guys, what is the biggest valve that you can fit on a 4.030" bore with ls1/ls6/AFR/All Pro heads? This is assuming stock valve centerlines (I want to use my current shaft rockers).

Bo White

iTrader: (59)

2.100 will go if you do the machine work to get it in the head.

DAPSUPRSLO

iTrader: (14)

What about the 2.15's that will go in the all pros? I guess it's too early for anyone to know for sure.

Bo White

iTrader: (59)

I do not know if the 2.15 will go in the production spacing, 2.100 is pushing that spacing.

xssive

iTrader: (123)

Im using 2.1" in a 6l head

Bo White

iTrader: (59)

Yeah, I think thats the largest Ive seen without a lot of work.

BrentB@TEA

we like to stick with a 2.08 valve on a 4.030 bore. We ussually do not use a 2.100 unless it is on a 4.100 bore.

DAPSUPRSLO

iTrader: (14)

Thanks guys. Brent, I'm assuming you guys stick with the 2.08's because of the shrouding. Can you get enough air through a 2.08 opening to feed a 408 at around 8000rpm?

LOnSLO

iTrader: (15)

Yes

DAPSUPRSLO

iTrader: (14)

You don't have any experience at those rpms do ya, LOL.

BrentB@TEA

Your assumption is correct. I would hope so if not we didn't do our job

DAPSUPRSLO

iTrader: (14)

Hey Brent, are you guys planning on running any programs in the All Pro Heads. I understand there is enough material to almost get 300 ccs out of the intake port. Not saying I need them that big but maybe the bigger ports (260cc ish-280cc ish) would be beneficial to a max effor n/a effort with a big solid roller.

GrannySShifting

iTrader: (10)

Like Brent said if you need a 2.15 valve, the head porter probably didnt do his job very well

BrentB@TEA

We are an All Pro dealer but the wait was out a bit for castings. I am sure we will do something with them soon or later. We are not really fond of the combustion Chamber they have. But other than they they look decent.

DAPSUPRSLO

iTrader: (14)

Cool, let us know what you find out.