DCOE 40's jets max out - Toyota Nation Forum : Toyota Car and Truck Forums

solid · 01-16-2005, 11:05 AM

Has anyone ever jetted the DCOE 40 webers Main and Air correct over 200 plus and still have good results? New racer on the block. have a 3tc usual up grade.Thank you.

automatic · 01-19-2005, 09:17 AM

Air corr. yes, mains, no.
Running Alcohol or something?
Was wondering why you'd go over 200 on the mains.

Flashmn · 01-19-2005, 02:02 PM

200 on both? sounds like someone is doing things he doesnt know

solid · 01-30-2005, 02:22 AM

when I first bought them used, the engine would pop.I took it to a shop.the guy told me to keep jetting the out the mains until the engine bogs down. I've gone to 170 mains & 200 air. And it feels like it floats on top end. And your right I don"t know what i'm doing ,thats why I ask questions? and I enjoy racing,just to have fun.

automatic · 01-31-2005, 09:20 AM

Yeah,the ogre has spoken,lol.
I've actually noticed that the Webers will tend to fire through themselves more often when rich rather than lean like your mechanic said. He's not far off though; if either rich, or lean, those carbs will let you know.
Have you done an idle tune, using the air mixture screws to get everything balanced out?
What's the rest of your jetting currently?
Idle jets, emulsion tubes, venturis?

solid · 01-31-2005, 06:46 PM

ok! Automatic, thanks for the response. the idle jets are 55, emulsion tube F11, venturi is 33 there's something written where you times venturi size 33mm X 1.25 to see if its compatible to what I need which is the DCOE 40. Is that right or what? anyways would like your opinion!

automatic · 02-10-2005, 06:13 PM

You need to first balance out both carbs as close as you can, using a Uni-syn, or another type of synchronizer tool. Then the idle mixture screws can be turned out, a quarter turn at a time to try and get the highest,smoothest idle, you'll have to lower the idle at the linkeage a couple times during the procedure.
If you haven't done this yet, you'll be in for an improvement.
The rest of the jetting you mentioned sounds pretty close.
Are your main jets 125?
air corrector 200?
Those should be close to what I'd think you'd need.
Don't know what that formula you mentioned refers to.