Jetting in the real world may not be what it says

[lewtot184]

one has to keep in mind that holley claims 2% flow change per jet size. 2% isn't much; half a step up or down, maybe.

 

[Canyon707]

I really see the value of a good a/f data collector.

 

[Canyon707]

This has been a good discussion . A/F reads are key

 

[HEMI-ITIS]

I was able to shave almost a 1/2 second when I started logging. Plus I was able to test without going to the track!

 

[383man]

This has been a good discussion . A/F reads are key

Yes that is so true. I would love to see some AF ratio readings on the different jets with the same hole size and different #'s.

I hear ya Al about the air bleeds but we were just talking about the jets that flow fuel. I am not aware of any air bleeds with the same hole size and a different #. Ron

 

[383man]

Well what you think is what you think.

You can count on that. Ron

 

[SUPERSTOCKRACER]

time for you guys to get into the year 2017,

BLP Jets, actual orifice sizing. Bit trickier than the holley sizes but actually much more accurate. 1/2 size too

 

[383man]

time for you guys to get into the year 2017,

BLP Jets, actual orifice sizing. Bit trickier than the holley sizes but actually much more accurate. 1/2 size too

Interesting ? Ron

 

[Budnicks]

We are leaving air bleeds out of this conversation?? And 2 carbs makes it that much more FUN

Yep & they are opposite of main jets,
smaller means fatter/less air & larger means leaner/more air

"damn" talk about extremely hard to read #'s both Main jets & Bleeds
"get out the ol' magnifying glass"

 

[HEMI-ITIS]

I need my glasses AND a magnifying glass to read the bleed

 

[383man]

I need my glasses AND a magnifying glass to read the bleed

Same hear as I definetly need the magnifying glass to read most of them. I already got biofocals !! Ron

 

[66Satellite47]

383 Ron, looking back on this thread, I see I missed a proper response to you that I should have made. Using your method of orifice size and verifying the results of the change is REALLY the proof in the pudding. The results are what counts not the "number" or orifice size, so if you use the same approach, should be just great. But the actual flow through a jet can actually vary independent of the orifice size.

 

[Canyon707]

I have learned that here from this thread. Good lessons

 

[66Satellite47]

I sure know I'm never too old to learn from others!!

 

[HEMI-ITIS]

I learn something new every day

It's remembering it that's a problem.I have CRS & CSS

 

[383man]

I learn something new every day

It's remembering it that's a problem.I have CRS & CSS

I agree as no matter how much we learn in life we can always learn more. And I found it surprises me sometimes where I learn things. When I worked at the dealer as I tech I had my own 5 ft file cabinet that I kept alot of my training books in. I found that many times since we cant remember everything we learn that I needed to just know where the info was on a certain system I may be working on to guide me sometimes or may just need that wire diagrahm to get the right color wire. So it was important to me to know where the info was I needed at times so I kept important books and info in my own file cabinet. And having CRS that file cabinet helped alot ! Ron

 

[dvw]

What do you think changing jet size even 4% is worth? I can tell you in my testing very little. Unless you are off to start with.
Doug

 

[cudatom]

I just wish they would stamp the numbers better on jets & bleeds!!

Agreed, I carry a magnifying lense in my tool kit and still struggle some timed.

 

[HEMI-ITIS]

What do you think changing jet size even 4% is worth? I can tell you in my testing very little. Unless you are off to start with.
Doug

Doug,do you even have air bleeds to fine tune?

 

[dvw]

Doug,do you even have air bleeds to fine tune?

Never even tried. The funny part is almost everyone in N/SS that runs a Mopar in the F/X classes runs some type of modified Holley, Quick Fuel etc. Mine runs Edelbrocks. It is quicker than most of them.
Doug