99lightning

does anyone know if the springs are the same and na motors? I know on some motors when you get the boost up it can push the valve open and you lose some power.

Dawson718

Are u still running the stock TB and fuel?

e55amgrocket

N/A heads have the same springs. What engines have you seen push the valves open in a gas application? I know/have had it happen on a diesel but never on a gas engine. We have 90lbs on the seat closed I think if my memory is correct.

Max.H

Nice hand port… I was looking into CNC ported heads for the M113k. Now this kinda makes me wanna move forward with it again. Nice job!

99lightning

rocket when i had my lightning those 5.4 motors have same springs as na motors and on a magnumpowers supercharger with 18-19psi created a dip in the dyno run up top. so i did 120lb behive valve springs on the intake side only to correct it.

Sir-Boost-a-Lot

iTrader: (1)

Itd be a great idea to check the seat and open pressures of your springs while the heads are apart. There's a good chance your springs are fine, but if theyre not, this is the time to find out!

The heads look great BTW!

99lightning

just as a guide when charles at magnumpowers tested the 2v ford head on the lightning I think they started to open up a hair on 10psi. so for higher boost guys it might be a good idea to check your springs.`

rockthemullet

m113k - 155 053 0120 (outer), 155 053 0020 (inner)
m113 - 113 053 0120

I've also seen issues with valve spring seating in LS, 4G63/4, BP based, and L67 engines at high boost

Quick55

Copying this from my main build thread, but:

Update:
Found a cracked valve when we were putting the heads back together. Ordered new exhaust valves from Ferrea and heads are being shipped back to me right now.

Mookster

^Very cute u slow azz

jcjmw

Sorry to bring back an old thread, but any after flow numbers and dyno numbers?

CerBErusM113

I know this is an old thread but is there an updated thread somewhere else?

A little information I have headers, afe dry flows, Eurocharged tune and a few other mods. From everything else I figure that puts me around 400+ hp and I plan on having a full exhaust built in the future.

I'm just wondering how much power in your opinion would the extra flowing heads make for an NA M113?

95ONE

Sadly, the last time the Original Poster was on this website at all was 10 months ago. I doubt we'll have any answers.

SPatykAMG

Out of pure luck I figured out who did the heads through a friend that knows him. If I could only find his contact info again.

viper04

Thanks for posting and keep us posted on the out come. I remember Sneakyneon's being a good guy to deal with, and very knowledgeable.

95ONE

I know quite a few people in Houston. PM me where it might have been done and I could give it a try.

hachiroku

is this a hand ported or cnc ported job?

cnc ported then hand finished?

mind posting shop info?

Magic Bryce

The porting of these heads was done by an individual who specialized in heads at SAM, but he graduated. He still does hand porting as side work, so if anyone is interested in getting in contact with him, let me know. As for the owner of this car, he sold it quite a while ago, and from what I can remember he never made it on a dyno. I'll try and check back in here at some point soon, so feel free to message me if you want the contact info of the guy who did the heads.

Magic Bryce

Any interest out there?

Hulk

I think there might be interest however you need to show what kind of gains would be made with or without cams etc.

Magic Bryce

With Brandon never making it on the dyno after putting the heads on, we don't know what kind of numbers it is making. The flow numbers were posted above.

Hulk

Like I said without before and after numbers with ONLY ported heads as the added mod you will not get people here.

cookiee55amg

how much would it cost to have my heads done??

Magic Bryce

Sent you a PM Cookie.

Hulk, until I pick mine up this spring I don't have a car to test on. So unless some people want to get their heads ported and report back with numbers, we are kind of at a stand still there.

Hulk

Yup
Problem is I don't know many that will shell out 2k to have it done to find out, but I'm sure many will be looking forward to see your gains from ported heads only.