cnydc2

I have my head at the machine shop that did my block and they are doing my head also. I am about to order my valves and have a ?:

I'm planning on going with oversize valves and want to knoe what size over valves I could go with using the factory ring seats? The shop that is doing it said that I could go with 1mm over exhaust with no problem but a .5mm intake might be pushing it. Has anyone used a .5 mm intake valve on a stock size ring seat?

If any one has done this or knows anything about this please let me know. Sorry for the dumb ? but I don't know much about headwork but am trying to learn.


Modified by cnydc2 at 10:16 PM 3/9/2005

cnydc2

Need Help Before I Order

rpm11

+1mm should be fine.
I've used +2mm on SRT-4's with the stock seat rings.

cnydc2

He said at 1mm exhaust would be just fine, the seat wouldn't be cut too thin. But I'm wondering if .5mm over intake would leave the ring seat cut too thin? I just don't want to have him cut it for the new valve and have the ring be too thin and flake way.

m R g S r

pm earl or head.....

they would deff. know

cnydc2

I'll give them a try. Thanks for the suggestion

Fkned

Yes you can use a =1mm on the exhaust,but only =.5mm on the intake.they will fit the stock seats.

cnydc2

Thanks Ed!!
The .5mm over intake won't leave the seats to thin? It is safe to go with that?

DRAGLS

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Ed’s Racing Heads &raquo;</TD></TR><TR><TD CLASS="quote">Yes you can use a =1mm on the exhaust,but only =.5mm on the intake.they will fit the stock seats.</TD></TR></TABLE>


What part of this didn't you understand?

cnydc2

There is no need for you to be a complete DICK!!

I just want to make sure that I get my question through so I don't mess up my head and spend more money and time in the long run than I have too. I'm quite sure that Ed doesn't care if I ask him to clarify. I think that it is better to research before I act than just go head first into it.

IF YOU CAN'T HELP ME, DO NOT POST!!!! I DON'T NEED TO HEAR YOUR BS!!!!


Modified by cnydc2 at 1:11 AM 3/11/2005

cnydc2

Anyone else have any more input for me?

getnasty

um.. I think the guy from racing heads knows his ****.. you dont need anymore input

cnydc2

I'm not doubting his input at all but would just like to no if anyone else has anything to add that I may need to know. I know that there are a bunck of guys on here who specialize in Honda's and nowhat will and won't work. I have had two different inputs so far and I just want to see what I should go with.

Ed said I'll be fine but Earl told me to just go with .5mm over on both b/c of overlap and I've seen 1mm over exhaust and .5mm over intake in a bunch of cars and want to know if they do that with factory seat rings and have had any problems at all or if what Earl said would be better and still show good gains. I just don't want to run into any problems when I'm putting it back together.

Fkned

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by cnydc2 &raquo;</TD></TR><TR><TD CLASS="quote">Thanks Ed!!
The .5mm over intake won't leave the seats to thin? It is safe to go with that?</TD></TR></TABLE>Perfectly safe bro,the intake seat ring is 33.5 mm wide so a +.5mm int valve just fits the seat,the top angle will be in the alum though.Here's a pic to show you,see how the 45 is right at the edge of the steel intake seat ring.

cnydc2

Thanks again ED!!!

So if I run .5mm over intake and 1mm over exhaust I won't have any overlap problems? And it is OK for the intake valve to be slightly seated in the alum?

Sorry for all the stupid ?'s, I don't know much about headwork at all and I just want to make sure everything is right and is going to be safe to run.

Fkned

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by cnydc2 &raquo;</TD></TR><TR><TD CLASS="quote">Thanks again ED!!!

So if I run .5mm over intake and 1mm over exhaust I won't have any overlap problems? And it is OK for the intake valve to be slightly seated in the alum?

Sorry for all the stupid ?'s, I don't know much about headwork at all and I just want to make sure everything is right and is going to be safe to run. </TD></TR></TABLE>Well the fact that the valve fits on the seat doesn't mean it wont hit anything like the piston or other valves.As far as clearence goes you and your engine builder will have to measure everything before assembly to be sure you have the proper clearences.The valve wont be riding into the alum if it's 33.5mm it will ride on the steel ring,thats the top angle that into the alum.What's your application?If you don't need new valves then stay stock size and just get a valve job.I did a head for John Ferguson/James Innes's car in T4 last year that made 736 whp on gas w/stock size valves,so it can be done w/o larger valves.

cnydc2

I made my decision with the complete help Of Ed. Thanks a ton and I'll keep ya posted.