Here's a shot of JMC twisting my SHAFT! lol!

 

looks good man!! those gouges should help with air turbulance and better fuel/air mixture "in theory"

 

If that was true then why arent engines made like that all the time? Why waste time smoothing and polishing if gouges are good for performance?

 

some turbulance is needed.. and i read in a popular science magazine years ago about some guy who pulled his head off and grouged up the piston head and got 2more mpg out of his economy... not something id want to to.. but yes air turbulance helps mix the fuel and air...

 

You don't want turbulence in the intake tract, you want it in the combustion chamber. Turbulence in the intake tract simply robs you of airflow.

Lookin' good, Neal.

How much confidence do you have in the valve springs? Weren't you thinking that may have been the source of the first failure? (in addition to the guides, of course)

-Joe

 

HI!... GIJOECAM : Yes we thought the CROWER valve springs were the culprit, but after talking to me engine builder yesturday we figured it was the cast iron valve guides being cut way too short due to the CNC porting done by FOX LAKE. If you notice in the pics below the difference. There just wasn't enough material in the guide to actually hold the valve steady. There was a ton of play between the valve stem and the cast iron guide. Due to I left the entire new MANGANESE BRONZE guide in tact there will be slightly less flow but 10 times more durability. That's what I'm looking for anyways. Plus once my turbo set-up goes on in the late spring I will just "FORCE" the air by the guide! LOL!

FOX LAKE CNC ported intake port with port matched C.I valve guide :




Same head but with the un port matched MANGANESE BRONZE guide :

 

HI!... Well JMC and I will be putting the rest of the engine/truck back together tomorrow. MIKE T over nighted my new chip, so it should be here tomorrow as well. If everything gooes well, we should be able to fire her up tomorrow and start data logging and breaking it in, again.......

 

Good Luck Neal!

 

Hi!... it's Alive!!!!!!!!!!!!!!!!!!!!!

 

Cool, now lets see a video or least some action pics.

 

Yea, it runs! Sounds nice too.

JMC

 

Holy Toledo! You're absolutely right Neal. Whoever did that to the first guide had absolutely no background in valvetrain engineering. They may have known how to program a CNC to hog out a port, but I'd be willing to bet there was no engineering design work done that would support doing that to the guide. I bet yours wasn't the only one that failed like that. The guides are that long for a reason. What you're doing is right. The bottom line is, the guide has to be that long given the geometry of the valvetrain. If you need the air that you give up due to the guide being in the way, then forced induction is the way to go...not hacking up the valve guide like that.

Moe

 

hows your truck neal?

 

HI!... Doing good, thanks for asking. Been too cold to get any vids yet. It's about -28c currently with the windchill. Had a small oil leak on the timing cover but it's fixed now. Last weekend I got the INOVATE MOTORSPORTS wideband hooked up. Need to get some dataloging done with my AUTOTAP as soon as the roads are not covered with snow. The wideband is showing I'm running really lean at WOT. About 13.8-14.0 is as rich as it wants to go currently. STOCH is right on, at 14.7 at idle. So I'm probably leaving about 20-30H.P on the table till it gets re-tuned.