Dcoe jetting... Someone check me here

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speedfreek88
Posts: 29
Joined: Mon May 07, 2012 11:29 am

Dcoe jetting... Someone check me here

Post by speedfreek88 »

Never had a turbo carb engine to work on and I've been trying to narrow down what all I need to order for my carb. I'm thinking from my research that I need to drop down from the 36 vents and need a 2.50 (or 3.00?) needle and seat... But really I'm lost. Could anyone give me advice on a starting point for my jetting?

Engine specs:
2007cc (78x90.5)
40x35 ported heads
W120 cam
Weber dcoe 40
Garrett t3 .63/.60 turbo

After looking at similar combos here's what I'm thinking but I may be way off...
2.50 n&s
F11 e tubes
55 idle jets
165 mains
200 airs
30 vents
??? Pump jets
madmike
Posts: 3146
Joined: Mon Jul 24, 2006 3:11 pm

Re: Dcoe jetting... Someone check me here

Post by madmike »

I forget what's in my DCOE40 :roll: :lol: for a needle&seat but I think it's ether a
250 or 275? and set floats
55 -70 idles, I just ordered some more
mains 155 & 165 or 165&170,, yes u can have two different ones :wink:
175 airs or 200?
F7&F11 E-tubes again u can mix them up :wink:
30 vents
I just drilled my squirter jets to 1/16th" :shock: :lol:
or find some .70's
what u used to control Timing?
set FP to 3 1/2 lbs,,, is ur FPR boost referenced?
hope I'm helpful? :lol: I have a dash mounted AFR gauge,so If u don't have one yet find one,you don't want too lean on 'Boost'
things go 'BANG!!!
speedfreek88
Posts: 29
Joined: Mon May 07, 2012 11:29 am

Re: Dcoe jetting... Someone check me here

Post by speedfreek88 »

Got a wideband waiting to go in this weekend when I wire the whole buggy... Ignition I went with megajolt, and fuel is Holley blue, 3/8" lines, malpassi boost referenced regulator. That is actually really helpful! So split the mains and e tubes and the idles somewhere between 55-70. Do you think the 200 airs will be too big? I know every engine is different but I'm just looking for the average norms...
rs58rag
Posts: 58
Joined: Fri May 10, 2013 7:36 pm

Re: Dcoe jetting... Someone check me here

Post by rs58rag »

Use what you are thinking and 170 airs. Get holley red kit for your blue pump to bring pressure down. Don't know if malpassi f/p regulator will restrict fuel flow but boost referenced holley 12-804 f/p reg. works great
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