strathconaman

NAMR6MT

I knew false knock was an effect but that 10-15 wtq difference in the 5700-6200 range (where the fun really happens) is substantial. This video should be cross-posted in every M9x subforum, at the very least.

Flat6 Innovations

I've only shared this data in my classes before I shot this very impromptu video last week. This is nothing new to us, I first saw this in 2008, and even before that.... I just never did a back to back till then. Once we did the back to back all the odd tuning and crappy plots shapes made sense. Looking at ignition angle and EGT simultaneously was alarming.

I'm sure the people that love these things will have an "issue" with these results, and will post their response videos. If they do that, well I'll throw in the ignition angle retardation, and exhaust gas temp data and a few other things that can't be disputed.

This is not an isolated experience, or manufacturer dependent- we see this with every brand of mount, some are worse than others but none are better than stock.

The next video will show me smashing these mounts with a tank, then melting the remnants with a flamethrower.

Dennis C

Interesting data!

TexSquirrel

I was going to buy semi-solid mounts before you shared that in the M9x Engine Rebuild 101 Class class back in 2019.
That knowledge, and the difference in price, made installing new OEM mounts a no brainer.

Thanks for sharing your knowledge Jake!

rileyracing1

Mounts , Plenums ,Cold air mods , Aftermarket air filters and intakes .... all a bunch of malarky ... Nice vid !!

Flat6 Innovations

Don't forget the radiator inlet grilles (diffusers).
Some bolt on things actually work.. Very few.

peterp

Damn, I just went "all in" on an engine mount ETF!

I wonder if you would see a similar difference with worn-out stock mounts versus new OEM mounts.



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ZuffenZeus

A before and after test using an anemometer or other device that could measure airflow would put this baby to rest.

Flat6 Innovations

No, never seen these traits with any stock mount, in any condition.

All it took was 4 laps at Road Atlanta on a hot August day to prove it. Then 7 miles on a mountain road proved it on the street.
"Modded to death" is my favorite term these days.

golock911

OMGoodness! I love this data. What poor thinking I went through when replacing my mounts to semi-solid. My thoughts were about power transfer loss due to mount stiffness. WRONG! Vibration sensors driving fuel and ignition circuits are very clearly affected. Guess I need to get rid of my '60's - '70's muscle car mentality... Super thanks for sharing!

Flat6 Innovations

Old cars care too.. When building engines for Formula Vees we kept running out of fuel the in the top end on the dyno. Come to find out the solid mounts on the dyno bell housing were causing the fuel in the carbs to behave in a manner that shut the needle valve off too soon, with an impact on float height. I had to soft mount the dyno when testing those engines. Instantly we dropped two main jet sizes, and made m ore power without running out of fuel. On the chassis dyno just last week one of my employees had the same thing happen to his 9,000 RPM Honda race engine running a pair of Weber DCOE carbs, all because vibration dampers weren't in place under the carbs.

Anything with a knock sensing system, and safety retard will see the negatives of false knock.

Everything matters. Every day is a school day here. I'm on the flow bench today, and I've already learned something that I didn't know at 0900 this morning.

wildbilly32

I have asked people who sell screens for the test result data of air flow without then with their product. None have supplied the requested information.

Doesn't matter to me because I know my engine guy would hunt me down like I was a chicken stealing dog if I put a set set on! No Thank You! I'll take a hard pass...

Flat6 Innovations

They don't have it.
If they did have it, they would not know how to interpret it.

All they know is they look good, and they "keep the radiators clean". Both of those sell them.
By all means I want them to keep selling them. I wonder if they'd consider putting one of my brochures in each of the product shipments?

ZuffenZeus

For those that are considering inlet grilles, I think it's important to understand that these cars were never engineered and designed with anything restricting or defusing airflow through the radiators and condensers. Inlet grilles will block larger objects (e.g. leaves), but the little stuff like dirt and road debris will still get through the grilles. And, in my experience, that's what gets clogged between the radiator and condenser. The big stuff can be easily vacuumed out with an extension tube.