k guys .....I searched .......all I found is the number 416


can anyone tell me a link ..... or the 3's them selves .

i heard there are good casteing 3's and bad ones ......for the 305 ...centrebolts ........I take it the 416's are one alternative ?

please guys ....my searches only brought up comparisons to flow rates and stuff .....I have red all of them ....

all help welcome thanx

 

181 and 601 are also 305 castings that will port and polish nicely.

 

Thanx alot man . SO I take it there is no prgressive list is there


....like one better then the others ....etc.............I am trying to get the max out of this ZZ4 cam swap ........


thanx again

 

The one you want for a center-bolt application is 081. What you probably already have. Just do them up, there's plenty of room for improvement.

 

Someone around here had the beginnings of a great tech article on head porting. I wonder where that might be. Any help, Todd?

 

I read the article by Daniel Burke on here . NICE ....but it didn't really get into casting numbers and what not .........I was hopeing to get my heads done by someone .I am very limited with space ...and don't have the place to do it on my own .......heck I am doing my LCA's and PH bar ...and all the other stuff in a parking lot LMAO

***** edit **** I have two castring numbers that are centerblot heads 14101081 is one ( probably mine) ...then these 14102187.....any know which one is the better alternateive between the two ?
....thanx for the help thus far guys

 

The only two articles I know of for head porting on this site, ar Daniels (tech article) and sitting bulls sig has a link to his .... looks like he left that one out on his previous post

 

It's not worth it to pay someone - could get new heads for that. It's not hard to do, I'm doing a set of 416's as we speak. Electric die grinder ($50) and electric router variable speed switch ($30)from harborfreight.com, some bits from discount-tools.com (~$35), protective goggles, an electric outlet, and a table outside to work on (flying metal makes too much mess inside).

If you want more specifics, email me jw_baum@yahoo.com

 

I have NO way of doing this, where I live prevents me from doing it ....plus I ain't going throw various amounts of castings ...to perfect this .......I want it done right ....and the first time. Although the tech articles are helpfull ...they do absolutly nothing for me ......ya .. " relieve the port a little" ......how much is a little ....this takes a very skilled hand in my eye .....and I ain't messing up my heads to find out how . Sure I love to learn this stuff ...but not when it can mean weither or not I drive my car this season. Plus I would want some one experienced there to see ....just how much is " enough" . I appreciate the knowlege involved in doing this right ......

this ain't like doing your first oil change.


thanx for any more advice ....

 

the 081 heads are better; these are the ones you want to port

 

Yeah, yeah

Anyway, D's89IROCZ, stop freakin' out and follow the link at the end of the sig for a good how-to on porting 305 heads. Yes, even YOU can do it (after all, I did it!)

 

Definitely the 081 casting. The 187 casting has decent runner design and fast burn chambers but the incoming fuel and air gets restricted right before the intake valve with a cast in shroud which is very hard to remove because of water passages.

 

thanx for the link ....but I just cant do it . Pictures like that do nothing for a guy who has never had his head off ...and doesn't know a bowl ...from a valve guide ..... heck I am still trying to find out if my springs are tooo strong for the hydrolic lifters


.....I'll walk away from this wondering if F-bird ...wants to make some cash or BEEEEERRRR ...cause he seems to really know about this stuff, and I live kind of close to him ( driveing distance )

if not ....I am chit outta luck ..... so thanx ......for the valuble text ...and pictures