:lol:

Charlie's :rules:

My motor is a total creampuff which is quite appropriate for a creamsicle. :theresa:

And it looks like it's gonna get 'Welded' too. :thumbsup:

I like to back the primary and secondary throttle plate to 0 then open them the same amount until you can get a reasonable idle. You may have to open the primaries a little more when you get close. Then set the idle mixture with the highest rpm and making sure all 4 screws are the same. You can fatten them up a little from max rpm to help drivability. I don't think 2.5 turns is a problem. It could be covering up a slighty lean jet or improper squirter cam.

Can you visualize the look of disappointment on the faces of bystanders watching that rig pull up, the doors open...........and seeing my car in the back. :lmao:

Somewhat similar to Roseanne Barr walking on to the stage of a strip club. :(

Thanks for the input Todd. It appears I may have a base to tune from and can start experimenting with idle input ranges. I may be too focused on transfer slot exposure, but I now have references marked for .025" exposure and a 1/4 turn out equals zero so that reduces a previous unknown element. As noted I can alter the fuel screw range with the idle air jets which is a luxury I've never had the car. The squirters are .031, previous carb's were drilled to .033. Previous motor liked the dark green cam so I'm looking forward to experimenting with cams on this carb. The way it responded to removing slack from the pump linkages would indicate the circuit may be on the lean side.

Freezing fog right now.........not a good tuning day!

I have used a couple of the Holley HP carbs in the past on 350 small blocks. After reading the posts on your carb settings I went out and checked the settings on my carbs. The Holley 650 HP with mechanical secondarys that I ran on the Camaro had the idle mixture screws at ¾ turn out. The Holley 750 HP I ran had the Idle mixture screws out 1-1/4 turn.

The pump discharge nozzle I used on the 650 HP was .029 on the primary and .031 on the secondary. The fuel pressure was 5 psi for the tune. I tried a higher pressure fuel pump one time (7.5 psi) and it threw the tune off. The carb was very sensitive to the pressure change.

I agree with Greg about dialing in the tune on the chassis dyno… saves a lot of time and you get to see the results of the changes on a graph. It’s also fun to stand back and watch your car all wound up.

:thumbsup:

This is the mechanical secondary Holley 650 HP I'm referring to... it's not an ultra HP just a regular HP... not sure what the difference is.

http://i1048.photobucket.com/albums/...ps6eeb15ae.jpg


A little off subject here... but do you recognize this bike?

http://i1048.photobucket.com/albums/...ps4cc08bce.jpg

:idea:

:sieg:

I just noticed this new emoticon is labeled "Sieg"... :lol: :lmao:

Sieg ain't no dummy...he came up with a plan where he only gets charged $.01 when someone uses it, but when he does, it's free. :thumbsup:

I looked back at my notes and my screws were 1.5 turns out. When I said a lean jet, I meant your actual main jets. They can cause a hesitation and a rich idle mixture will help. I found that my car needed a really agressive pump cam. I used the orange cam but it comes down to your own configuration. With an idle mixture that is to fat, you stand a good chance of fouling plugs. I'd see at what idle mixture screw adjustment get you to your highest idle and use that as your baseline. Then you can adjust accel cam and jets and tweak the idle mixture a hair if needed.

What idle air bleed jets were in this carb? Mine has 70's but the unknown factor (to me) is the impact of the idle bypass system in the baseplate. Holley says it does not impact other circuits.......but it does impact the tune.......especially if trying to compare to you 4150 :headscratch:

Look at the features on this page to see some of the changes: http://www.holley.com/0-80802HB.asp

Even though it may bore you now that you're into techie-tuning. :mock:
NEVER! It's got a motor and wheels!

In the backyard:
http://sieg.smugmug.com/Motorcycles/...G%209562-M.jpg

Hey! I earned that fair and square after damn near two months of trying to get an archaic Gen 1 running. :sieg:

Maybe Davie if you work hard enough at your lucrative mod job Jody will give you a special one! http://www.desmonorthwest.com/forums...es/pictime.gif

Skip - Is there is a smiley appropriate for you?.......maybe a string of them but certainly not a singular one. http://www.desmonorthwest.com/forums...walkingdog.gifhttp://www.desmonorthwest.com/forums...milies/ban.gifhttp://www.desmonorthwest.com/forums...ies/sign06.gifhttp://www.desmonorthwest.com/forums...stirthepot.gif http://www.desmonorthwest.com/forums...readjacked.gifhttp://www.desmonorthwest.com/forums...fighting72.gifhttp://www.desmonorthwest.com/forums...es/dousing.gif http://www.desmonorthwest.com/forums...es/muahaha.gif


:cheers:

The idle air bleeds in my 650 HP are 68's.

Using squirters, springs, cams, floats, power valves, jets, and such seems so primitive and old fashioned....Lol.

These days I call my tuner, we plug in the lap top, push a few buttons and I'm good to go. Seriously the new stuff is awesome :mock:

Nice form on the trials bike :thumbsup:

Thanks for checking the bleeds. :thumbsup:

What happens when you can't reach your tuner and you have a corrupt map? :popcorn2: :mock: :popcorn2:

Don't have much talent on the trials bike but I really enjoy it. :thumbsup:

am I the only one that tunes by ear, butt and vac gauge?
I have never worried about turn count.

Fetch a decent idle around 800, or till you read 0 hg at the venturi port. Register a slight idle circuit from the secondary blades. Turn the mixture screws in till you detect idle change then back out 1 turn. Then Butt tune the accel pump cams and squirters.

You got me... I'll have to start working on plan B.... maybe a back up ECM... extra sensors... triple A membership :headscratch:

:cheers:

:idea: :thumbsup:

Now show us your personnal MX track :warning:

That's my preferred way once I find a base which hopefully is the case. :thumbsup: Typically I'll find high/low range of the mixture screw, center it and fine tune with vac guage for max vac which is around 11" with this cam @ 9,50-1,000. The pump cams and squirters are the fun part. :unibrow:

This is the best guide I have: http://www.holley.com/data/Products/.../199R10321.pdf

:bitchslap: You forgot spare batteries! :D

Friends house 10 minutes away count? :unibrow:



Crappy audio courtesy of GoPro :rolleyes:

I was going to ask if that was the same camera because of the audio. Did they resolve that for you yet?

Looks like maybe a hare scramble? My girlfriends' 13 year old daughter's preferred dirt bike contest over motocross.:thumbsup:

I agree with you guys on the "tune by ear" scenario.... Most of us grew up doing this and it isn't rocket science.... UNTIL... Until you've got some issue that isn't being tuned out by ear and butt... and I think that's where Sieg is/was.

The ol' ear/butt tune works like a charm when everything is going "swell".

Regarding GoPro:
I'm not done arguing with them about their defective products and engineering IMO................:warning:

Old Skool just like me and my car. :sieg:

The carb's I enjoyed tuning we're the pair of side-draft Weber DCOE's put a hose in the stack and listen to the music and tune the other venturi's to the same note. :sieg:

:thumbsup:

just checking, I thought I might have been going crazy. :lostmarbles:

Its hard to tell what stage he is in without hanging on the fender with him.

Me too!

I understand how difficult it is to troubleshoot without having eyes and ears on the issue and I really appreciate everyone's efforts. :thumbsup:

Your welcome Sieg...glad I could help.

Nuts! Quoted me before I caught my typo............thankfully I have the perfect smiley for it. :sieg:

Skip, you've definitely kept me smiling through all this! :thumbsup:

How can you tune in this weather!

http://sieg.smugmug.com/Other/No-Roo...MAG3494-XL.jpg

Even Rev iced up this morning.

http://photos.smugmug.com/photos/i-m...m6XMg9L-XL.jpg

26* with freezing fog this morning and it didn't keep that goofy mutt from swimming. :lol:

To 'Sieger System' guy... :D

I edited my post quoting yours.

I think you'll like my 'reason for editing'.

No joke, it's gonna get so cold here the septic tank cleaning guy told me that since it's supposed to be sub 0° overnight, that I need to put an old blanket on top of the septic tank cover so he can try and get it open tomorrow!


What a look on that pooch's frozen mugg. :lol:

Mercy edit...............:lmao:

:idea: Drizzle water on that cover and leave him a hammer and chisel with smiley note of course.

That look is target fixation on a tree that's home to a squirrel he's been trying to catch for a year now. He wasn't phased by the temp, we were out another 30 minutes and he had no desire to leave the orchard. :)

I like your solution for the septic sanitation guy!

LOL

Ok, a squirrel hunt explains the look.:warning:

I do have some actual 5 letter tech advice.



EZ EFI. :clap:

I made waffles!! OH and It's 80* here. Had to pull a rear-end apart out in the driveway and I got a lil sweaty :relax:

I have a 4 letter dream........

MAST :unibrow:

:action-smiley-027: :action-smiley-027: :action-smiley-027: :action-smiley-027: :action-smiley-027: :action-smiley-027: :action-smiley-027: :action-smiley-027: :action-smiley-027: :action-smiley-027: :action-smiley-027: :action-smiley-027: :action-smiley-027: :action-smiley-027:

:sieg: me

When I first decided to do an LS engine build with EFI I was concerned about support... that's the reason I went with a GM ECM. There's lots of support for parts, and tuning. I didn't want to get into a system that may or may not be supported five years from now. That was my logic choosing a system just in case you ever decide to go there :D

On your motocross video I was expecting a view looking forward... maybe some passing :thumbsup:

Good logic on the ECM and your choice of builders. :thumbsup:

Here's a forward view from Central Oregon, still no passing, at my age I wait til they fall down. :rules:

http://youtu.be/HqWLJxIECuw