Re: Who’s a fan of low compression?

> Totally normal JBOT wrote:

> -------------------------------------------------------

> > P D wrote:

>

> > -------------------------------------------------------

>

> > > EH FCC of the QCB wrote:

>

> >

>

> > > -------------------------------------------------------

>

> >

>

> > > > Totally normal JBOT wrote:

>

> >

>

> > >

>

> >

>

> > > > -------------------------------------------------------

>

> >

>

> > >

>

> >

>

> > > > I took a standard long hose compression checker and took off the

>

> >

>

> > > crimped

>

> >

>

> > >

>

> >

>

> > > > hose connectors to reveal a hose barb underneath.

>

> >

>

> > >

>

> >

>

> > > >

>

> >

>

> > >

>

> >

>

> > > > Cut hose and then hose clamp. I also don’t use the brass

> extensions

>

> > it

>

> >

>

> > >

>

> >

>

> > > > came with. Schrader right into the jug.

>

> >

>

> > >

>

> >

>

> > > I’m going to try this with the hose one I have 🤙🏻 Thanks for the

> pro

>

> >

>

> > > tip.

>

> >

>

> > Again , Test before and after the 'conversion' .

>

> >

>

> > Post the results , please . ;)

>

> Again, I’m giving you the results. Jesus. I tested it years ago. I’ve

> been using this for like 10 years.

>

> It was about 20% off.

>

> If you want exacts go mod one for fucks sake

I know what you told us . And, I appreciate your sharing your experiences .

No offense meant .

I'm simply looking for a second 'opinion' . 2 step verification kinda thing . ;)

Re: Who’s a fan of low compression?

> P D wrote:

>

> I know what you told us . And, I appreciate your sharing your

> experiences .

>

> No offense meant .

>

> I'm simply looking for a second 'opinion' . 2 step verification kinda

> thing . ;)

We could all just get the same Stens brand tester and then our data will all be "zeroed" to the same place and your numbers and my numbers would actually be comparable

Re: Who’s a fan of low compression?

Totally normal JBOT /

> P D wrote:

> -------------------------------------------------------

> > Totally normal JBOT wrote:

>

> > -------------------------------------------------------

>

> > > P D wrote:

>

> >

>

> > > -------------------------------------------------------

>

> >

>

> > > > EH FCC of the QCB wrote:

>

> >

>

> > >

>

> >

>

> > > > -------------------------------------------------------

>

> >

>

> > >

>

> >

>

> > > > > Totally normal JBOT wrote:

>

> >

>

> > >

>

> >

>

> > > >

>

> >

>

> > >

>

> >

>

> > > > > -------------------------------------------------------

>

> >

>

> > >

>

> >

>

> > > >

>

> >

>

> > >

>

> >

>

> > > > > I took a standard long hose compression checker and took off the

>

> >

>

> > >

>

> >

>

> > > > crimped

>

> >

>

> > >

>

> >

>

> > > >

>

> >

>

> > >

>

> >

>

> > > > > hose connectors to reveal a hose barb underneath.

>

> >

>

> > >

>

> >

>

> > > >

>

> >

>

> > >

>

> >

>

> > > > >

>

> >

>

> > >

>

> >

>

> > > >

>

> >

>

> > >

>

> >

>

> > > > > Cut hose and then hose clamp. I also don’t use the brass

>

> > extensions

>

> >

>

> > > it

>

> >

>

> > >

>

> >

>

> > > >

>

> >

>

> > >

>

> >

>

> > > > > came with. Schrader right into the jug.

>

> >

>

> > >

>

> >

>

> > > >

>

> >

>

> > >

>

> >

>

> > > > I’m going to try this with the hose one I have 🤙🏻 Thanks for the

>

> > pro

>

> >

>

> > >

>

> >

>

> > > > tip.

>

> >

>

> > >

>

> >

>

> > > Again , Test before and after the 'conversion' .

>

> >

>

> > >

>

> >

>

> > > Post the results , please . ;)

>

> >

>

> > Again, I’m giving you the results. Jesus. I tested it years ago. I’ve

>

> > been using this for like 10 years.

>

> >

>

> > It was about 20% off.

>

> >

>

> > If you want exacts go mod one for fucks sake

>

> I know what you told us . And, I appreciate your sharing your

> experiences .

>

> No offense meant .

>

> I'm simply looking for a second 'opinion' . 2 step verification kinda

> thing . ;)

I hate you because you put the idea in my head that I might be wrong, which I might be but I don’t think I am. But then I obsess and am like, “well am I wrong?” Cuz I’m cursed with being a libra. And now today I have to put a long fucking hose back onto this thing to see if I’m right or wrong. Fuck you

Re: Who’s a fan of low compression?

> Totally normal JBOT wrote:

> -------------------------------------------------------

> I hate you because you put the idea in my head that I might be wrong,

> which I might be but I don’t think I am. But then I obsess and am like,

> “well am I wrong?” Cuz I’m cursed with being a libra. And now today I

> have to put a long fucking hose back onto this thing to see if I’m right

> or wrong. Fuck you

LOL . Sorry , I didn't mean for you to doubt yourself .

And , I know about Libras . I'm married to one . ;)

Re: Who’s a fan of low compression?

Dirty30 Dillon /

> LSLB RXb wrote:

> -------------------------------------------------------

> We could all just get the same Stens brand tester and then our data will

> all be "zeroed" to the same place and your numbers and my numbers would

> actually be comparable

I'm going to grab one when I have the chance. Much like the TrailTech CHT, having a universal baseline would be super useful. We can all chime in on CHT through a TT gauge/similar, but there's always people trying to chat about temps after using a infrared meter or some meat thermo.

Standardizing measurements/methods is the way to go.

Re: Who’s a fan of low compression?

IF the tester has a 1-way (ie schrader) valve then there would be an offset to the reading equal to the cracking pressure of that valve. i think for most schrader springs that's in the <5psi range. in this application the lowest spring rate would be best.

if that valve is as close to the cylinder as possible (on the plug adapter?) then the ultimate hose length/volume wouldn't matter.. but you WOULD have to make sure you fully pressurized the hose by turning the engine over enough.

if that valve is instead at the gauge, and you have a long length (volume) hose, then your accuracy will suffer, as you are adding the volume of the hose to the combustion chamber.

if you don't have a valve, you don't have a choice... as short as possible is the only way.

Re: Who’s a fan of low compression?

My hose comp gauge read 20 psi higher than Snordley’s homemade Johnny

Re: Who’s a fan of low compression?

> Totally normal JBOT wrote:

> -------------------------------------------------------

> > P D wrote:

>

> > -------------------------------------------------------

>

> > > Totally normal JBOT wrote:

>

> >

>

> > > -------------------------------------------------------

>

> >

>

> > > > P D wrote:

>

> >

>

> > >

>

> >

>

> > > > -------------------------------------------------------

>

> >

>

> > >

>

> >

>

> > > > > EH FCC of the QCB wrote:

>

> >

>

> > >

>

> >

>

> > > >

>

> >

>

> > >

>

> >

>

> > > > > -------------------------------------------------------

>

> >

>

> > >

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> >

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> > > >

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> >

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> > >

>

> >

>

> > > > > > Totally normal JBOT wrote:

>

> >

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> > >

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> >

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> > > >

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> > > > > > -------------------------------------------------------

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> >

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> >

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> > >

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> >

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> > > >

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> >

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> > >

>

> >

>

> > > > > > I took a standard long hose compression checker and took off

> the

>

> >

>

> > >

>

> >

>

> > > >

>

> >

>

> > >

>

> >

>

> > > > > crimped

>

> >

>

> > >

>

> >

>

> > > >

>

> >

>

> > >

>

> >

>

> > > > >

>

> >

>

> > >

>

> >

>

> > > >

>

> >

>

> > >

>

> >

>

> > > > > > hose connectors to reveal a hose barb underneath.

>

> >

>

> > >

>

> >

>

> > > >

>

> >

>

> > >

>

> >

>

> > > > >

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> >

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> > >

>

> >

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> > > >

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> >

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> > >

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> >

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> > > > > >

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> >

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> > >

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> >

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> > > >

>

> >

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> > >

>

> >

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> > > > >

>

> >

>

> > >

>

> >

>

> > > >

>

> >

>

> > >

>

> >

>

> > > > > > Cut hose and then hose clamp. I also don’t use the brass

>

> >

>

> > > extensions

>

> >

>

> > >

>

> >

>

> > > > it

>

> >

>

> > >

>

> >

>

> > > >

>

> >

>

> > >

>

> >

>

> > > > >

>

> >

>

> > >

>

> >

>

> > > >

>

> >

>

> > >

>

> >

>

> > > > > > came with. Schrader right into the jug.

>

> >

>

> > >

>

> >

>

> > > >

>

> >

>

> > >

>

> >

>

> > > > >

>

> >

>

> > >

>

> >

>

> > > >

>

> >

>

> > >

>

> >

>

> > > > > I’m going to try this with the hose one I have 🤙🏻 Thanks for

> the

>

> >

>

> > > pro

>

> >

>

> > >

>

> >

>

> > > >

>

> >

>

> > >

>

> >

>

> > > > > tip.

>

> >

>

> > >

>

> >

>

> > > >

>

> >

>

> > >

>

> >

>

> > > > Again , Test before and after the 'conversion' .

>

> >

>

> > >

>

> >

>

> > > >

>

> >

>

> > >

>

> >

>

> > > > Post the results , please . ;)

>

> >

>

> > >

>

> >

>

> > > Again, I’m giving you the results. Jesus. I tested it years ago.

> I’ve

>

> >

>

> > > been using this for like 10 years.

>

> >

>

> > >

>

> >

>

> > > It was about 20% off.

>

> >

>

> > >

>

> >

>

> > > If you want exacts go mod one for fucks sake

>

> >

>

> > I know what you told us . And, I appreciate your sharing your

>

> > experiences .

>

> >

>

> > No offense meant .

>

> >

>

> > I'm simply looking for a second 'opinion' . 2 step verification kinda

>

> > thing . ;)

>

> I hate you because you put the idea in my head that I might be wrong,

> which I might be but I don’t think I am. But then I obsess and am like,

> “well am I wrong?” Cuz I’m cursed with being a libra. And now today I

> have to put a long fucking hose back onto this thing to see if I’m right

> or wrong. Fuck you

Funny shit here! Ive always liked you JB without really knowing why until now. Are you a left handed Libra? Lefties are in their right frame of mind. (edited)

Re: Who’s a fan of low compression?

> live ɘvil wrote:

>

> Funny shit here! Ive always liked you JB without really knowing why

> until now. Are you a left handed Libra? Lefties are in their right frame

> of mind.

please trim down quotes like I just did when i quoted you here.

must be a libra thing.

as a leo, I wouldn't get it.

Re: Who’s a fan of low compression?

Totally normal JBOT /

I’m righty tighty.

Left handers are soulless monsters

Re: Who’s a fan of low compression?

Totally normal JBOT /

Obvious Leo is obvious

Re: Who’s a fan of low compression?

> Totally normal JBOT wrote:

> -------------------------------------------------------

> I’m righty tighty.

>

> Left handers are soulless monsters

Dont forget that!

Re: Who’s a fan of low compression?

> LSLB RXb wrote:

> -------------------------------------------------------

> > live ɘvil wrote:

>

> >

>

> > Funny shit here! Ive always liked you JB without really knowing why

>

> > until now. Are you a left handed Libra? Lefties are in their right

> frame

>

> > of mind.

>

> please trim down quotes like I just did when i quoted you here.

>

> must be a libra thing.

>

> as a leo, I wouldn't get it.

>>

>

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>>

>>>>>>>

<

>>>

<

<>><><>><

<<<<

>>>

<>]>

Na, fuck you. (edited)

Re: Who’s a fan of low compression?

> live ɘvil wrote:

> -------------------------------------------------------

>

> Na, fuck you.

:(

Re: Who’s a fan of low compression?

> LSLB RXb wrote:

> -------------------------------------------------------

> > live ɘvil wrote:

>

> > -------------------------------------------------------

>

> >

>

> > Na, fuck you.

>

> :(

I love ya any ways

Re: Who’s a fan of low compression?

Totally normal JBOT /

So when I’m wrong I’m wrong I guess

Tested new hose approx 2.5in from Oring on the plug adapter to the dial of the compression gauge.

Read 132ish and stopped climbing at

Tested another hose at 12in with the same as above

Read 145ish before it stopped climbing

These are done cold, open throttle pullstarts with as many as it took until no more pressure.

So it’s opposite what I thought. I think the 150psi air compressor hose might be swelling due the the pressure enough to overpump it where it actually adds false extra pressure in the hose kinda like an air spring, but fuck all if I know.

Re: Who’s a fan of low compression?

Totally normal JBOT /
576FE247-5718-4EA2-BEE4-21457CF18350.jpeg
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9A7FB407-43D2-4986-8346-7BD37D920D26.jpeg

Re: Who’s a fan of low compression?

Totally normal JBOT /
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Re: Who’s a fan of low compression?

Totally normal JBOT /

Oh and 1/8npt gauges or fittings can literally thread into 1/4 ID rubber air compressor hose. Just clamp it and no leaks.

Re: Who’s a fan of low compression?

Cool!

I think all you've proven is that compression testers aren't a great absolute measurement for tuning and setup purposes, but I'm glad (some of) the laws of physics aren't being broken in your shop. I've also noticed that after a bunch of cranking engines will get moistened with fuel and oil and read higher compression.

If you have a tester that you use and can get repeatable measurements that kinda help you gauge relatively one setup to another, which it sounds like you're doing, that's probably good but saying stuff like '135 is better than 150' across the board doesn't work for everyone.

Re: Who’s a fan of low compression?

> Graham Motzing wrote:

> -------------------------------------------------------

> Cool!

>

> I think all you've proven is that compression testers aren't a great

> absolute measurement for tuning and setup purposes, but I'm glad (some

> of) the laws of physics aren't being broken in your shop. I've also

> noticed that after a bunch of cranking engines will get moistened with

> fuel and oil and read higher compression.

>

> If you have a tester that you use and can get repeatable measurements

> ts that kinda help you gauge relatively one setup to another, which it

> sounds like you're doing, that's probably good but saying stuff like

> '135 is better than 150' across the board doesn't work for everyone.

so wait, Graham, are you saying we should all buy the Stens 752-311 Compression Tester so we can all have comparable data??

Re: Who’s a fan of low compression?

^ That is exactly what Graham is saying

Re: Who’s a fan of low compression?

> LSLB RXb wrote:

> -------------------------------------------------------

> > Graham Motzing wrote:

>

> > -------------------------------------------------------

>

> > Cool!

>

> >

>

> > I think all you've proven is that compression testers aren't a great

>

> > absolute measurement for tuning and setup purposes, but I'm glad (some

>

> > of) the laws of physics aren't being broken in your shop. I've also

>

> > noticed that after a bunch of cranking engines will get moistened with

>

> > fuel and oil and read higher compression.

>

> >

>

> > If you have a tester that you use and can get repeatable measurements

>

> > ts that kinda help you gauge relatively one setup to another, which it

>

> > sounds like you're doing, that's probably good but saying stuff like

>

> > '135 is better than 150' across the board doesn't work for everyone.

>

> so wait, Graham, are you saying we should all buy the Stens 752-311

> Compression Tester so we can all have comparable data??

Yes, until someone ports their exhaust and ruins it for everyone.

Re: Who’s a fan of low compression?

> Graham Motzing wrote:

>

> Yes, until someone ports their exhaust and ruins it for everyone.

porting...is FORBIDDEN

(edited)

Re: Who’s a fan of low compression?

when I deployed last year, we had a group chat. My nickname was meatwad.

Re: Who’s a fan of low compression?

I've only used the hi-hi comp heads from treats on any moped I've owned. The compression may be a bit too much but it does make a bit of a difference.

Re: Who’s a fan of low compression?

> Graham Motzing wrote:

> -------------------------------------------------------

> Ah man I just wrote this on that thread about the eurokit, then I was

> like 'nobody wants to hear an old man ranting about low compression' so

> I didn't post it.

>

> Yeah especially on big over square setups, I don't really have a good

> reason to explain it but I'll think about it. It seems like on the

> hobbit and v1 especially, with the 47+ mm kits, letting them get through

> the lower rpm with lower load and bmep.

>

> It's always better for the combustion process to get an earlier spark

> event and have everything fully burn, I think the short stroke makes

> things happen faster, and it takes longer to propagate the flame front

> across a bigger bore, so lower compression kinda softens things up.

> Makes it so it's not so violent when it does hit, so instead of putting

> all that extra heat into the piston and head and detonation, it's

> pushing the piston down. You can kinda feel it like smoothly building

> pressure on each hit rather than slamming hard, maybe? Maybe I'm nuts? I

> don't know.

>

> Big dome, tight narrow squish, like less than 40%, push the timing as

> hard as you can and pound fuel to the fucker, sure to blast.

Old men don't grow old by being stupid, don't be afraid to share the smarts, know many will not listen, but if they make it to where you are they MAY remember what you said. :)

Re: Who’s a fan of low compression?

Alan Jackson /

at least ive discovered another possible reason why my thought processes work as they do

libra here too.

Libras always have something witty to say, making them great conversationalists. ...

Librans crave for attention and will get upset if they are ignored.......

Librans usually die.......

Re: Who’s a fan of low compression?

Astrological signs: the only tuning data less relevant than compression pressure

Re: Who’s a fan of low compression?

Totally normal JBOT /

^

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