DHLA40 Jetting / Setup help!

[MarkMk1Golf]

Hi

Dont know any VW forum with carbs, so ill give it ago on here.

My problem is that someone has "DIY" drilled some of my jets so i have to start over.

Engine is running, and can idle and rev without any problems.

My problem is "part throttle driving" and full gas from low rpm while driving, the engine stutteres/shakes/nosedive until i reach abit higher rpms. Same problem for part throttle driving, if i want to slighty increase my speed in 5th gear, the engine stutteres/shakes/nosedive.

Info on my engine:

2.0L
10.8:1 compression
16v
DHLA40
Chokes / Venturis : 32
Sport Camcat cams 283/279

What would you recommend for main jets, air correctors, idle jets, idle jet holders etc ?

Really hope someone can help

Thanks

[MarkMk1Golf]

Hey Pumaracing

First off, thanks for the reply - Any help is appreciated.

Im not doing this engine swap for the bhp, only for the sound of carbs, and it looks much nicer in the enginebay, compared to a 1.8 8v which i had before.

Its a standard 2.0L 9A bottom with a standard PL head. The inlet manifold is a Redline one, which should be OK.

Ive already had it on a dyno and it made 160.2 bhp, so you´re right about the 150-160 range The guy doing the dyno test should have fixed my part throttle problems, but he couldnt :/ (Lack of knowledge)

Could these part throttle problems have anything to do with 32mm chokes ?

I can do my carb specs as they are right now.

Chokes : 32
Main Jets : 142
Air Corrector : 210
Emulssion : .6
Idle Jet : 0.7 (Used to be 0.52)
Idle Jet holder : 4x 150 (Used to be a 7850.1)
Acc Pump jet: 0.45 (Used to be 0.4)

Looking forward to hearing from you.

Thanks

[MarkMk1Golf]

Back again

Followed your guide somewhat, but still having issues when opening the throttle slighty. Its more or less the same "Part throttle / midrange" problem i had before, now its just more serious. Before the change it was at cruising speed, now its also in very slowly acceleration.

Chokes : 36
Main jets: 142
Air corrector : 210
Idle jets : 0.5
Idle jet holder : .2
Pump jets : 0.45

Can you give any advice on what to do next ?

[MarkMk1Golf]

Alright - I got some 0.7 idle jets from the last setup, i will try these with the new chokes + idle jet holders.

[MarkMk1Golf]

Thanks Dave, i will have a look at it.

Though i got it running perfectly yesterday with the old chokes.