2004 6.0 NV4500 Tahoe

[randeez]

you should thread each one in and file it down to contour the port...a hole is worse for flow than a nub

 

[Dantheman1540]

I don't have a race truck so I wasn't all that concerned with it. Honestly, the only reason I have ported heads is because I didn't want to wait on a valve job on the stockers.

Cut the bolt off and send-er.

I can't remember who on here had some ported heads and was questioning that bolt hole being exposed after porting, a while back. Thats what made me remember my camaro smoking because the oil seeping past the bolt and having to seal it. If you compare what's there on a stock head, vs that little bolt, I think thats why they say its not a huge deal. Obviously it will hurt the flow some, but IDK if its a single HP or not

Just teasing you although I still want you to tune that turd and be amazed with the power you unlock.

Cut them off I shall!

you should thread each one in and file it down to contour the port...a hole is worse for flow than a nub

Got data to back that up? I thought a hole would just be passed over although I suppose it could create a point of turbulence or some sheet idk I’m not an aeronautical engineer. Although I do have a degree in aeronautics from a fairly decent school .

 

[pwtr02ss]

Just teasing you although I still want you to tune that turd and be amazed with the power you unlock.

Cut them off I shall!

I do need to do that. Talk dirty tune talk to me and maybe something will click and make me do it or try to find someone to do it for me.

That 15 mpg is nearly enough motivation to get something figured out. Would like to be 19 range...

 

[Dantheman1540]

I do need to do that. Talk dirty tune talk to me and maybe something will click and make me do it or try to find someone to do it for me.

That 15 mpg is nearly enough motivation to get something figured out. Would like to be 19 range...

This $4.09/gal premium ain’t no joke, I’ll probably get 13-14 now instead of 15-16. Yay me.

 

[pwtr02ss]

This $4.09/gal premium ain’t no joke, I’ll probably get 13-14 now instead of 15-16. Yay me.

Yup. Fortunately I kept the avalanche on the 87 diet but the Yukon gets premium. Went from 3.75 to 4.09 here YESTERDAY

 

[Buggdave]

I ran into the same issue when installing my heads on my build last night, steam ports are only open on one side of the head. Since my iron 6.0 block had the rear water jacket under the rear steam port sealed, I decided to swap the heads to the other side. I understood that you could reuse your head gasket after torquing if they were not Heat Cycled.

 

[Dantheman1540]

Yup. Fortunately I kept the avalanche on the 87 diet but the Yukon gets premium. Went from 3.75 to 4.09 here YESTERDAY

We made that jump two weeks ago, only gonna get worse as summer kicks in. I'm definitely going to have the low octane spark table dialed in so I can run the fuel of the poor.

I ran into the same issue when installing my heads on my build last night, steam ports are only open on one side of the head. Since my iron 6.0 block had the rear water jacket under the rear steam port sealed, I decided to swap the heads to the other side. I understood that you could reuse your head gasket after torquing if they were not Heat Cycled.

I find it so odd they left those ports closed, I'm just gonna drill them out with a vacuum sucking the shavings as I drill. It will take less than 5minutes to drill instead of the half-hour it takes to pull them, swap them, and retorque everything. Then I won't run into that problem again down the road either.

 

[Dantheman1540]

So I sorta had my 862 heads sold but I think I'm gonna keep them for a while. I still have a 212/218 cam on the shelf and that combo is a heck of a bump up on an LQ. Hopefully, I don't need them for a JY short block anytime soon and maybe I can send the heads out to get ported, comparing the ported 862s vs ported 243s there's not much flow difference so they wouldn't be a bad option for a future build.

 

[randeez]

Just teasing you although I still want you to tune that turd and be amazed with the power you unlock.

Cut them off I shall!

Got data to back that up? I thought a hole would just be passed over although I suppose it could create a point of turbulence or some sheet idk I’m not an aeronautical engineer. Although I do have a degree in aeronautics from a fairly decent school .

a nub just creates turbulence. a hole creates a low pressure zone which acts like a venturi that will either suck more oil in from the head or "hold" onto the air passing by it

 

[pwtr02ss]

We made that jump two weeks ago, only gonna get worse as summer kicks in. I'm definitely going to have the low octane spark table dialed in so I can run the fuel of the poor.

Wait until you see what it is today...

 

[randeez]

even the cmax gets premium, quit being cheap.
how are our fossil fuel overlords going to maintain their dominance?

 

[George B]

About 3.55 for 89 and 2.99 for e85 here.

 

[Rocket Man]

$4.15 for premium at the place I buy from here today. But I’m only running about a tank a month now that I’m retired so it’s no big deal. Back when I was commuting a tank wouldn’t even last a week. I guess the overlords will have to get rich off someone else like @randeez once he gets that beast up and running again.

 

[randeez]

Ya...need to get atleast 10mpg to break even with what work pays for mileage used to be anyway don't rememberwhat gas was when I figured it out. Cmax makes money...yukon may break even

It 4.10s on stock tire rpm was high doing 90mph+ everywhere..on 35s atleast the rpm should drop back down and i prob wont drive as fast. Don't think imma lose much mpg compared to before.

 

[pwtr02ss]

even the cmax gets premium, quit being cheap.
how are our fossil fuel overlords going to maintain their dominance?

I'm not a baller like yourself. Daddy T has to use the peasant fuels...

 

[randeez]

I'm not a baller like yourself. Daddy T has to use the peasant fuels...

There's a chance I have to pass a prius in the HOV lane...I need every hp I can get

 

[Rocket Man]

Ya...need to get atleast 10mpg to break even with what work pays for mileage used to be anyway don't rememberwhat gas was when I figured it out. Cmax makes money...yukon may break even

It 4.10s on stock tire rpm was high doing 90mph+ everywhere..on 35s atleast the rpm should drop back down and i prob wont drive as fast. Don't think imma lose much mpg compared to before.

You figuring wear and tear and depreciation in too? I remember at one job they offered me comp to drive my own rig or drive a work truck and the job covered half the state. I would have made money on the comp until I figured out the cost of tires, oil changes, wear and tear and the fact I’d be putting an extra 20,000 miles a year on my truck. I decided to drive their truck.

 

[randeez]

Driving their truck isn't an option or would be a better deal.
Most companies outfit trucks with mph,braking, idle, GPS monitoring shit also now tho, so prob wouldn't care to drive one if so....I **** off a lot on the clock

 

[Dantheman1540]

a nub just creates turbulence. a hole creates a low pressure zone which acts like a venturi that will either suck more oil in from the head or "hold" onto the air passing by it

The small nub is the current goal, the only time a small nub is desirable.

Wait until you see what it is today...

Friday mornings seem to be the cheapest of the week then Friday after lunch it always jumps. I had to fill up Wednesday so I don't have to cry till next week lol.

Driving their truck isn't an option or would be a better deal.
Most companies outfit trucks with mph,braking, idle, GPS monitoring shit also now tho, so prob wouldn't care to drive one if so....I **** off a lot on the clock

I f*** off so much on the clock if I had a GPS on the company truck I'd have no job.

 

[Rocket Man]

GPS wasn’t even invented yet back when I was doing that, in fact neither were cell phones. Had to stop at a phone booth when the pager went off but they had no idea if the page even got through so I’d just snort another line and keep on. F em. Loved those days.