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Search found 395 matches

by frnkeore
Tue Jun 15, 2021 6:10 pm
Forum: Engine Tech
Topic: Octane rating vs CR
Replies: 41
Views: 897

Re: Octane rating vs CR

It is sounding to me, that no one has tuned a 87 oct engine, in a old school wedge headed engine or a more modern heart chamber? I had assumed that it would be understood that timing would be set in the 36 to 42 deg total range, with mech and vacuum adv no vac or electronic retard or knock sensor. I...
by frnkeore
Tue Jun 15, 2021 10:02 am
Forum: Engine Tech
Topic: Octane rating vs CR
Replies: 41
Views: 897

Re: Octane rating vs CR

Is the conscious that no one can build a high performance engine, that will run on the the 87 octane gas, at the pump, closest to where they live? Or does it mean that dynamic compression ratio means nothing? Or does it mean that DCR is only useful if certain other criteria are met and if so, what a...
by frnkeore
Mon Jun 14, 2021 7:46 pm
Forum: Engine Tech
Topic: Octane rating vs CR
Replies: 41
Views: 897

Re: Octane rating vs CR

The criteria here is 2V wedge and heart shaped chambers, both aluminum and cast iron. Old school, if you will, not direct injection. A safe guild line, in a loaded engine, with a .040 - .060 squish. 80F deg 800 ft elev. Randy and Paul. Temp and Elev are as above. Loaded is loaded, no matter the wei...
by frnkeore
Mon Jun 14, 2021 4:06 pm
Forum: Engine Tech
Topic: Octane rating vs CR
Replies: 41
Views: 897

Re: Octane rating vs CR

David Redszus wrote: Mon Jun 14, 2021 11:58 am
frnkeore wrote: Mon Jun 14, 2021 3:19 am What is the highest, dynamic CR for 87 octane gas?
Which pump gas?

No two are the same.
I live in Oregon and we have both 87 & 92 oct, with ethenal in the winter months. But, to any that may post, assume it's your local pump, that you pull up to, when you need gas.
by frnkeore
Mon Jun 14, 2021 12:36 pm
Forum: Engine Tech
Topic: Octane rating vs CR
Replies: 41
Views: 897

Re: Octane rating vs CR

The criteria here is 2V wedge and heart shaped chambers, both aluminum and cast iron. Old school, if you will, not direct injection.

A safe guild line, in a loaded engine, with a .040 - .060 squish.

80 deg 800 ft elev.
by frnkeore
Mon Jun 14, 2021 3:19 am
Forum: Engine Tech
Topic: Octane rating vs CR
Replies: 41
Views: 897

Octane rating vs CR

What is the highest, dynamic CR for 87 octane gas?
by frnkeore
Mon Jun 07, 2021 6:23 pm
Forum: Engine Tech
Topic: Indy car engine difference…
Replies: 17
Views: 1360

Re: Indy car engine difference…

Again, you have no idea, and you seem to ignore the facts. Anyone that knows anything about engines, knows a 22% increase in CID doesn't make up for a 35% reduction in RPM. I ignore no facts, I've posted facts, your posting mostly opinions. The Buick is actually a moot point. It was a failure and a...
by frnkeore
Mon Jun 07, 2021 2:43 pm
Forum: Engine Tech
Topic: Indy car engine difference…
Replies: 17
Views: 1360

Re: Indy car engine difference…

Again, you have no idea what you're talking about. The Buick Was a 2-Valve, pushrod, stock block engine, that required increased boost to run with the lighter purpose built, 4-valve, duel overhead cam engines. USAC allowed the increased boost. CART did not, because the CART team owners on the board...
by frnkeore
Mon Jun 07, 2021 2:28 am
Forum: Engine Tech
Topic: Indy car engine difference…
Replies: 17
Views: 1360

Re: Indy car engine difference…

First, Buick's were allow in CART but, didn't get the boost advantage. So, the last year that CART ran in the Indy 500, before it changed to IRL, was 1995. Pole speed 231.6 mph There were 3 chassis, Lola, Penski (didn't make the grid) and Reynard and there were 5 engines, Ford, Mercedes, Menard/Buic...
by frnkeore
Sat Jun 05, 2021 3:30 pm
Forum: Engine Tech
Topic: Indy car engine difference…
Replies: 17
Views: 1360

Re: Indy car engine difference…

You can blame Tony George, for what has happened to it!!! Had CART kept control, it could today, have rivaled F1. You have no idea what you're talking about. Tony George tried to save IndyCar, but was too late. With all do respect, Mike, your very wrong. First TG is a egotistical, self centered, po...
by frnkeore
Sat Jun 05, 2021 2:46 am
Forum: Engine Tech
Topic: Indy car engine difference…
Replies: 17
Views: 1360

Re: Indy car engine difference…

It is very sad, what happened to Indy Car! I've watched it since the late '50's. My dad worked for the company that owned the Novi, Indy car (Meyer and Welch. The Meyer, Louis Meyer, 3 time Indy winner). You can blame Tony George, for what has happened to it!!! Had CART kept control, it could today,...
by frnkeore
Tue Jun 01, 2021 1:11 pm
Forum: Engine Tech
Topic: How Oversquare Can An Engine Get And Remain Streetable?
Replies: 17
Views: 1374

Re: How Oversquare Can An Engine Get And Remain Streetable?

I suppose what is really being talked about, is bore/stoke ratio? W/o a 4V head, it's hard to get the ideal combination of squish, compression and valve flow, the higher you go. The 289 had a bore/stroke ratio of 1.394, Jacks Stud, 1.267 but, the king of the hill, as far as common, domestic engines ...
by frnkeore
Tue May 18, 2021 5:35 pm
Forum: Engine Tech
Topic: Howards Cams
Replies: 19
Views: 1896

Re: Howards Cams

I finally called on the advertised phone line. Ben did quit, with notice and a guy named Kirk, has taken his place. He is not a cam engineer but, is 64 and has built engines for many years. They do not, as of now, have anyone that can run the Cam Pro software so, new lobes can not be created, nor ca...
by frnkeore
Tue May 18, 2021 12:17 pm
Forum: Engine Tech
Topic: Howards Cams
Replies: 19
Views: 1896

Re: Howards Cams

Pete, I just called again, he still has a voice mail at the Howards number that I always called to talk to him.

Is the Andrews cams, the motorcycle cam company?