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Search found 1448 matches

by skinny z
Wed Oct 05, 2022 8:24 am
Forum: Engine Tech
Topic: 383 sbc first dyno experience
Replies: 154
Views: 6791

Re: 383 sbc first dyno experience

Wondering if aircleaner is a help or a hindrance??20221005_175728.jpg Why that particular filter element Steve? Would a traditional 14x4 or 5 allow you to close the hood? Below is a pic of a 14 x 4 on a 2" dropped base. It fits under the short cowl hood on my 3rd gen Camaro. But barely. wp_20170708...
by skinny z
Tue Oct 04, 2022 4:13 pm
Forum: Engine Tech
Topic: Dropping the exhaust decibels on street motor
Replies: 15
Views: 805

Re: Dropping the exhaust decibels on street motor

And InTechs comment on advance at cruise. Is the theory that the motor would be under very light load at cruise I can run so much advance? Generally, yes. Lighter engine loads will have higher manifold vacuum and the incoming air/fuel will tend to be less dense. That being the case, more ignition t...
by skinny z
Mon Oct 03, 2022 10:54 am
Forum: David Vizard forum
Topic: Cam Master
Replies: 17
Views: 3062

Re: Cam Master

Thanks Stan.

I'm going to continue experimenting and see where I end up.
I'm starting to see a few cause and effect scenarios and will pursue that a little further.
Thanks again.
by skinny z
Sun Oct 02, 2022 4:38 pm
Forum: Engine Tech
Topic: A visual example of the 90 degree crank drawback.
Replies: 23
Views: 850

Re: A visual example of the 90 degree crank drawback.

The new Vette has a flat plane crank.
What's up with that?
5.5 litres. 4.104 x 3.150 stroke.
8400 RPM! (I had to read that twice).
Is it the short stroke that makes it workable?
by skinny z
Sun Oct 02, 2022 1:08 pm
Forum: David Vizard forum
Topic: Cam Master
Replies: 17
Views: 3062

Re: Cam Master

(Editing is difficult in this forum) Is there a workaround to what's happening above with the ever increasing overlap? The cam spec that's generated with 72 degrees of overlap, despite resulting in the error message is very much along the line of Torque Master. About 288/288 with a 108 LSA on a 104 ...
by skinny z
Sun Oct 02, 2022 1:02 pm
Forum: David Vizard forum
Topic: Cam Master
Replies: 17
Views: 3062

Re: Cam Master

Follow up. So, in using an overlap entry of 72 when the overlap to use is suggested at 79.8, I get that error message as pointed out previously. When changing the overlap entry to match the overlap to use, the duration increases (naturally) but is far greater than I would think reasonable for a 6250...
by skinny z
Sat Oct 01, 2022 1:31 pm
Forum: Engine Tech
Topic: From a solid roller to hydraulic roller
Replies: 85
Views: 1728

Re: From a solid roller to hydraulic roller

Here's a really good running street engine. 355" SBC 10:1 with ported 492 heads, Performer RPM, and Holley 600. RPM---TQ--BHP 3200--436--266 3400--443--287 3600--445--305 3800--444--321 4000--443--337 4200--440--352 4400--440--368 4600--441--386 4800--441--403 5000--432--411 5200--422--418 5400--41...
by skinny z
Fri Sep 30, 2022 4:57 pm
Forum: Engine Tech
Topic: What was Chevrolet thinking ?
Replies: 32
Views: 1433

Re: What was Chevrolet thinking ?

On the other hand analysis can also be recreational.
Free too.
Especially when the shit is your own.
Learn something. Analyze. Learn some more.
And not paralyzed at all!
by skinny z
Fri Sep 30, 2022 1:03 pm
Forum: Engine Tech
Topic: What was Chevrolet thinking ?
Replies: 32
Views: 1433

Re: What was Chevrolet thinking ?

Skinny. in all due respect you are just not going to learn what needs to be learned by computer sim ing this stuff to death.... You need to get in there and get dirty. Cam in motor , in car... Car down ¼ mile... Time slip yeee ha or wow What happened :( ha ha No disrespect taken F-BIRD. But as far ...
by skinny z
Fri Sep 30, 2022 8:57 am
Forum: Engine Tech
Topic: From a solid roller to hydraulic roller
Replies: 85
Views: 1728

Re: From a solid roller to hydraulic roller

That said, with 540 CID, it seems torque isn't the issue.
It could be time related as suggested.
And now there's evidence is some unhappiness at 1750....
by skinny z
Fri Sep 30, 2022 8:55 am
Forum: Engine Tech
Topic: From a solid roller to hydraulic roller
Replies: 85
Views: 1728

Re: From a solid roller to hydraulic roller

And your above examples, are application specific, again, they don't apply to everything. So, you're saying lsa is application specific? And isn't say cut and dried, like maybe a "formula" would suggest? That's correct. The "formula" is application specific. And the "formula" wouldn't apply in this...
by skinny z
Thu Sep 29, 2022 8:52 pm
Forum: Engine Tech
Topic: From a solid roller to hydraulic roller
Replies: 85
Views: 1728

Re: From a solid roller to hydraulic roller

It was mentioned earlier about the tune.
Do you have an in-cabin AFR gauge? And a vacuum gauge? Could be something going on that RPM, throttle position and engine load.
by skinny z
Thu Sep 29, 2022 9:28 am
Forum: Engine Tech
Topic: From a solid roller to hydraulic roller
Replies: 85
Views: 1728

Re: From a solid roller to hydraulic roller

Can you find out the overlap triangle between the two cams? There may be a lot more area change than just looking at .050 duration and total lift would suggest. And there may not, lol. But I suspect a milder hyd/roller isn't coming off the seat near like an aggressive solid/roller so the overlap tr...
by skinny z
Mon Sep 26, 2022 12:12 pm
Forum: Engine Tech
Topic: What was Chevrolet thinking ?
Replies: 32
Views: 1433

Re: What was Chevrolet thinking ?

Skinny. in all due respect you are just not going to learn what needs to be learned by computer sim ing this stuff to death.... You need to get in there and get dirty. Cam in motor , in car... Car down ¼ mile... Time slip yeee ha or wow What happened :( ha ha No disrespect taken F-BIRD. But as far ...
by skinny z
Mon Sep 26, 2022 11:18 am
Forum: Engine Tech
Topic: What was Chevrolet thinking ?
Replies: 32
Views: 1433

Re: What was Chevrolet thinking ?

The other old ZZZ cam 235/235° was in "straight up" 114/114. Do you happen to know the advertised values of that cam? I think we may have established that the performance difference might be minor but I'm still interested in how different they are. If the ramp rates are similar then the 235 is real...