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Search found 330 matches

by smeg
Tue Sep 15, 2020 10:53 pm
Forum: Engine Tech
Topic: Intake manifold porting
Replies: 11
Views: 788

Re: Intake manifold porting

The biggest thing is the runner at the plenum is trapezoidal in shape and goes to rectangular at the flange,makes it difficult to measure correctly. I have had intakes bolted to cylinder heads on the bench and pitot probed,its something to be mindful that you are looking for minimal flow loss but j...
by smeg
Wed Aug 19, 2020 2:36 am
Forum: Engine Tech
Topic: 423 SBC combo help
Replies: 85
Views: 2430

Re: 423 SBC combo help

Those 227 heads are pretty shit out the box, years ago I ported a set for a guy with a 427 cube dirt late model, no word of a lie it picked up damn near 100rwhp without touching anything else. They are small in the pinch & turbulent at high lift. Open the pinch up to the limit of the casting & fix ...
by smeg
Fri Jun 05, 2020 6:43 pm
Forum: Engine Tech
Topic: Porting, Using a Mill
Replies: 27
Views: 2154

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: 27
Views: 2154

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: 843

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: 106
Views: 5207

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: 919

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: 7177

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: 7177

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: 1197

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: 1408

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: 2307

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: 1223

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: 22
Views: 2206

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: 22
Views: 2206

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?