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Search found 328 matches

by smeg
Fri Jun 05, 2020 6:43 pm
Forum: Engine Tech
Topic: Porting, Using a Mill
Replies: 22
Views: 1348

Re: Porting, Using a Mill

Yes thinking back I started out that way. I made my own large circular cutter with 2 opposite tips, one slightly further out and .002" higher than the finishing tip. the first would cut the bulk and the second would take a skim, finish was good and you could feed twice as fast as one cutting tip. Th...
by smeg
Fri Jun 05, 2020 4:12 am
Forum: Engine Tech
Topic: Porting, Using a Mill
Replies: 22
Views: 1348

Re: Porting, Using a Mill

Boy, that was painful for me watching that, why is the feed so slow? Your not making chips, your making dust.
by smeg
Fri May 22, 2020 2:24 am
Forum: Engine Tech
Topic: Cylinder wall thickness ,,, again :)
Replies: 11
Views: 703

Re: Cylinder wall thickness ,,, again :)

We hold our minimum to .080" for a stock to mild engine. Never had an issue in lots of years.
by smeg
Tue May 19, 2020 10:48 pm
Forum: Engine Tech
Topic: Oil pressure vs volume
Replies: 91
Views: 3061

Re: Oil pressure vs volume

bob460 wrote:
Sat May 16, 2020 10:08 pm
Steve would love to see a set of Aussie HIGGINS heads and intake on this new track boss block...... 900hp+ easy.
SCM new race head would be killer on one as well.
by smeg
Tue May 05, 2020 8:25 pm
Forum: Engine Tech
Topic: SBC block leaking water internally...
Replies: 11
Views: 806

Re: SBC block leaking water internally...

I think I can get this running for a grand or less.

Yes and you can get aides for free.
by smeg
Wed Mar 18, 2020 11:03 pm
Forum: Engine Tech
Topic: Whats Your Definition of a Engine Builder
Replies: 77
Views: 6746

Re: Whats Your Definition of a Engine Builder

Don't want to say, might upset some.
by smeg
Fri Mar 13, 2020 1:14 am
Forum: Engine Tech
Topic: Whats Your Definition of a Engine Builder
Replies: 77
Views: 6746

Re: Whats Your Definition of a Engine Builder

I always thought you had to be a machinist first and a builder second the guys that started off as machinist first normally end up as good engine builders,because they can machine anything that put in front of them. I agree 100% with this, i know a guy who with a few brain cells, had no formal trai...
by smeg
Tue Feb 25, 2020 9:18 pm
Forum: Engine Tech
Topic: Welded piston domes
Replies: 9
Views: 1109

Welded piston domes

Many years ago, I remember seeing some honda pistons that had the top welded up to make more compression. Anybody ever done this?
by smeg
Tue Jan 28, 2020 8:22 pm
Forum: Engine Tech
Topic: Does fuel movement in bowls during acceleration impact AFR?
Replies: 28
Views: 1243

Re: Does fuel movement in bowls during acceleration impact AFR?

I know that it does in the plenum at the drags.
by smeg
Wed Dec 18, 2019 1:58 am
Forum: Engine Tech
Topic: Bowl sizing questions
Replies: 45
Views: 2143

Re: Bowl sizing questions

I have read somewhere that a big bowl acts as a storage area for the positive waves coming down the port [DM I think], also I think it was larry M that said the bowl needs to be around the diameter of the valve [along the head] This has always worked for me.
by smeg
Tue Dec 17, 2019 2:43 am
Forum: Engine Tech
Topic: Questions for the Cam Grinders Hydraulic Rollers
Replies: 12
Views: 1131

Re: Questions for the Cam Grinders Hydraulic Rollers

The cam lobe doesn't know what the rocker ratio is at the other end, the lobe only knows the force generated by the spring/rocker ratio. If the spring tension is sufficient to maintain valve train control at max rpm, don't see a problem with high[er] ratio rockers. I understand nascar engines are r...
by smeg
Wed Nov 06, 2019 9:13 pm
Forum: Engine Tech
Topic: mahle piston failure
Replies: 23
Views: 2081

Re: mahle piston failure

Thanks for that, I am going to have to do some thinking on this one for sure.
Makes me wonder if you had a gapless top ring combo, would the gaps in the spacer ring line up??...
by smeg
Wed Nov 06, 2019 5:41 pm
Forum: Engine Tech
Topic: mahle piston failure
Replies: 23
Views: 2081

Re: mahle piston failure

Protech Racing wrote:
Tue Nov 05, 2019 1:05 pm
Long term detonation . If the ring gaps are all lined up, it has run for a while with light detonation.
I have seen this rings lined up before, what are the reasons behind this please?
by smeg
Thu Oct 17, 2019 10:12 pm
Forum: Engine Tech
Topic: CNC Heads?
Replies: 32
Views: 2447

Re: CNC Heads?

If you already have a file to copy you can change tool offsets. This will "shrink" or "enlarge" the ports without actually redesigning it. Computers only do what they are told. But you can lie to them. Everybody talks about CNC heads, what usually I ask is, who did the original porting you are copi...
by smeg
Wed Oct 16, 2019 5:41 pm
Forum: Engine Tech
Topic: CNC Heads?
Replies: 32
Views: 2447

Re: CNC Heads?

Tell the computer to make it a certain percentage larger? Are cnc machines now using AI to CNC? You can't just stick a head in, type in that you want this hole this much larger and let it work. That's not how cnc works. If there's a pattern to follow, someone programmed that pattern. The cnc machin...