Compression Ratio Explained and Other Viewer Mail Muscle Car Of The Week Video Episode 350

[@thesquirrelchroniclesakare7808]

You just made more sense in 5 mins. Than most folks do in 2 hours ! Thank you

[@coloradoray1]

Nothing beats muscle cars and muscle car talk from the best car guy on KZbin. It takes my mind off the world and it’s problems even if it’s for just a little while.

[@bobsilver3983]

High compression small blocks were underrated back then...I have a 1968 Lemans 350 H/O with the 320 horse high compression engine ...123,000 miles...NEVER been rebuilt...in the last 52 YEARS, the only engine work that has been done is 2 carb rebuilds, 1 timing chain and gears replaced, one fuel pump, and the water pump...this is in 52 YEARS! I did ditch the points...because they are junk....for a Pertronix electronic guts...runs great...leaks a little, not much, and seems to burn very very little oil. Can you dig it!!!

[@hmackprotection1]

Bob Silver that’s actually cool as hell man

[@johna1160]

Excellent explanation of compression ratio.

[@haleydog8]

Great site I really like the professional presentation of these videos. Keep up the great work Kevin.

[@freedomfirst5420]

I already knew about compression ratio, but your explanation was simple and easily understandable, to just about everyone!👍 Edit: You also explained why high octane fuel, is needed for high compression ratios!👍

[@GTR-ex2ly]

Boss 429 engines use a dry-deck sealing scheme. The cylinder bores are sealed by copper rings fitted to grooves. Each head also requires four 1/4" neoprene O-rings to seal the oil passages, seventeen 1/2" O-rings to seal the water passages, and a bead of silicone sealant. The heads will not work on a standard 429 engine block.

[@kjester3460]

Excellent review as usual. I look forward to each of your blogs. I always learn something, even though I'm 72 and lived the in the 60s with my buddies owning muscle cars and street racing. I've owned many of those wonderful cars of the 6os and early 70s and still have my '67 Chevelle. Keep up the good work.

[@mlp-hot-rod5824]

Hey, Kevin. I know I've brought this up before, but since you're going more into the history of muscle cars lately, I wondered if perhaps you could talk about stories about 'lost' muscle. When the '70's brought doom & gloom to America, a lot of awesome stuff got cancelled. I was hoping you could talk about that soon. Perhaps a Top 5 or 10 lost american muscle episode?

[@thefettfan3994]

Nice to have that technical detail explained also as to how important it is in a functional muscle car, thank's MCW gang!!!

[@paulcondie2520]

What's crazy and impressive, is my 2015 Cadillac ats 3.6 has 11:5.1 compression ratio and they recommend 87 octane! Direct injection is the game changer!

[@MikeBMW]

Thanks, Kevin! Always love these updates! :)

[@barcrrt850]

I learn something new with every episode I watch. This one was extra good.

[@SovereignKnight74]

Love this channel. Love those MOPARS! One of the best KZbin channels on KZbin!

[@Duececoupe]

Always a wealth of information gang, informative, educational and entertaining! Here's a question, how many engines, during the muscle car era, did Ford, GM and Mopar work on that never went into production....thinking about the Ball Stud Hemi and their double overhead camshaft Hemi.... Would've loved to be around back then, 60's racing and drag racing! Keep up the phenomenal work!

[@joegoodman4312]

Outstanding vid. Cleared something long overdue up in my head at least. Cheers

[@Richaag]

5:17 ...“110 is actually harder to light”... and everything I thought I knew about octane just went right out the window. Thank you Kevin, for educating me on this. (Insert Google search “Octane Rating” here)

[@RoadRunnergarage8570]

I have a 1/64 model of that Mickey Weise Dart in my collection BTW...

[@allantaylor3288]

Great video again and explanation of all things auto😊👍

[@oldtown6240]

Nicely done.

[@camaro69green31]

Awesome and thanks for this video. Cheers.

[@steves.922]

Good job, Kevin!

[@RoadRunnergarage8570]

Thanks again for keeping the videos coming...

[@johngallagher4526]

Very interesting Kevin!! Im not a motor guy.. Awesome cars for for sure. Direct Connection!!

[@edstransitscott9186]

Great job, right on

[@WPGinterceptor460Interceptor]

1 compression point = about 20 horse! so if a stock motor was 8-1 compression at say 200 horse. if you were to just change the piston to a 9-1 compression, the motor would now be 220 horse. 10-1 = 240 horse.. etc etc

[@richardmalone4721]

I’ll be 1st to admit I didn’t know all-that, but I’m pounding my chest boasting I know a Chevys Firing Order: 8675309, oh wait, that’s Jenny’s number, (please keep that on the down-low as my wife’s sorta jealous that I remember her number). Ok, 18436572! See? Thanks Kev...

[@perrygrant4299]

That is the correct firing order for the earlier LT type Chevy engines. The newer LS engines have a slightly different firing order of 18726543. If you look at it on a diagram you will notice this is to simulate a 'flat-plane' crankshaft firing order (more common in racing applications) , which is very helpful for "exhaust scavenging" for V8s that still use a 'cross-plane' crankshaft, which is most common in the mainstream production runs. There are a couple of You Tube videos you will find very fascinating: One is entitled; "Flat-Plane Crank vs. Cross-Plane Crank", And the other one is: "Engine Sounds Analyzed", as flat-plane crank engines do produce an exhaust note that is very different from a cross-plane crank engines. They can also rev much higher than a cross-plane crank engine.

[@firefightingvet9181]

Good video great content as always

[@jimgee2676]

i got me a 1970 plymouth fury 111 convertible in that citron mist metalic paint like that cuda ...love the color

[@archiesmith5138]

Are the button car collection on display at that location and where are they?

[@hmackprotection1]

Well Done

[@RoadRunnergarage8570]

Nice Z28 you're using to explain this BTW...

[@RoadRunnergarage8570]

I also have a 1/64 model of that 69 442 as well...

[@collateral1123]

Has the question of net horsepower vs gross horsepower been done? If so what episode is it addressed. I wonder about how much net power those cars had before they released those net figures in the 70’s.

[@NewtonWashinton]

the current 5.0 in a Mustang GT is 12 to 1, Mazda is up to 14 to 1 in a N/A Engine.

[@musashinagatsubo9574]

Kevin is one of the "Brothers", right?

[@RoadRunnergarage8570]

I do know that if a compression ratio is say 11:1, it will have more power than an engine with say 8:1 compression ratio...

[@markwegner6100]

Cool.

[@jruzich43]

70-72 Cutlass's all had plastic inner fenders regardless of color.

[@JesusLovesYouPerfectly]

#musclecaroftheweek could you do a video describing what exactly makes an engine a high performance engine? and what separates it from a non-high performance engine?

[@gasparini76]

Apologies, but the explanation could be slightly more clearer for those who are not used to get involved with these details on a daily basis.

[@sanfranciscobay]

Compression Ratio of Top Fuel Dragsters and Funny Cars that produce 10,000 horsepower is 6.5 to 1 or 7 to 1. en.wikipedia.org/wiki/Top_Fuel

[@sanfranciscobay]

@Larry Kin Does that change in compression apply to muscle cars?

[@markg7030]

You are going to confuse everybody. Generally compression ratios are lower with supercharged/ turbocharged engines. When talking about street cars for example normal 4,6,or 8 cyl engines use about 7 - 9 to 1 compression. High performance about 10- 11 to 1 compression. Super high compression about 12-13 to 1.

[@xyrzmxyzptlk1186]

Larry Kin - Exactly. 6.5 - 7.0 at idle maybe. That compression ratio is effectively way higher running though the traps at full boost. 🚀

[@freedomfirst5420]

@@markg7030, yes, but turbo chargers and super chargers essentially increase the compression ratio much higher, at higher rpms. Making the initial compression ratio initially lower, for better everyday driving and fuel economy at lower rpms. Normally aspirated engines, with 11:1+ compression ratios, are absolutely horrible on the street, plus you have to use very high octane fuel, not available at your average gas station.Unless you want to spend thousands of dollars, to run E85. You will also have to test the E85 every tank, and make sure it is at least 75% ethanol, because it can vary from 60%- 90%, in some cases. Or just buy a modern car, where the electronics do just about everything for you.

[@RoadRunnergarage8570]

Well since i can't afford or store a real muscle car( or IH tractor).. I collect the models instead!!

[@rbrauto1]

After The Current Situation In The USA,Abates and Life Return's Too Somewhat NORMAL,I Do Not Care How MUCH a CLASSIC CAR COST'S ME,BEING A CORRECT CAR. I'M ALL IN. LIFE IS TO SHORT...............................................