2.055/1.625 valves in LT1 heads

I was told to try this question in here as well as the LT1 tech so here it goes


Im building a 383 for in my car right now that I plan on running 15 lbs of boost on, Im doing the heads right now for it, I was just wondering if the little bigger valves over 2.02/1.6 is going to do anything for me, I have big enough seats in there to put them in we checked all that out sence I machined new seats in there, to much valve for the heads? they fit in there nice, I just think it might be a little to much valve in there for all the more the heads flow, but one of the guys at the machine shop wants me to put them in there, any thoughts on this?

BTW: Im going to be running a custom solid roller blower cam in here thats why hes saying to go with the bigger ones in there.

Is there even room in the LTx chambers for that much valve? I've got a 2.08/160 in my AFRs and it's a tight fit.

ya theres room in there for them theres still even room between them, you have to put bigger seats in there so that you can grind out further but they do fit in, ill take some pics of them tonight in the head.

http://www.streetlethal.net/heads/DSC02797.JPG http://www.streetlethal.net/heads/DSC02792.JPG theres a pic of the 2.055/1.625s in my heads