8V Carbs

[mitch750]

So Bdays comin up soon, and was thinking of buying myself something...

checking out some vids on utube and came across heaps of vdubs with carbs,

my mk2 is an 8V and has k-jet so dont know if that changes anything but ive seen some vids of 8V's with these carbs and they sound pretty cool, dunno much about them but they look tough so thought id start a thread.

Anyone that wants to share info go ahead, worth it? expensive? manageable? fun? headache? whatever let us know

[Jarred]

Generally, going from EFI to carbs is a backwards step.

Since you havn't posted a pic, I'm going to assume you are talking about a twin DCOE setup. With manifold and with carbs rebuilt it would set you back around 1,000. plus a bit more and you can get brand new, take a little off and you can get some that need rebuilding. (not for the faint hearted) Then add another 3-500 bucks to get them tuned properly.

You'll make similar power, with less driveability, and worse economy, and worse reliability.

btw, your car is actually EFI (digifant)

[mitch750]

Thanks for the info jarred, i didnt know much about them so thought id just ask, but now they definitely sound like a headache.

annnnnyyywayyy, moving on to another subject,

Ill be doing an engine swap down the road maybe next year, and I'm caught up between 2 engines, the 20V 1.8t, or a mk4 r32 engine...

since youve done a vr6, i was wondering how hard and if it was worth it?

i know the r32 sounds ridiculous, but the only reason im thinking about it is cause im most likely going to import a damaged r32 from the states to fix mine, and if the engine is good in it..then...PLONK

Ive always been stuck on the 20V though.. just looks easier

[Jarred]

there is plenty of info on VR and 20VT swaps into mk 2's both on this forum, on other forums, and on dedicated websites.

Neither swap is for the feight-hearted, or light wallet-ed.

[ozgti]

I have bike carbs if you're interested.

[mitch750]

I have bike carbs if you're interested.

were they on your mk2?

have any experience with them?

[ozgti]

8V Carbs

Nope. Going 16v hopefully so not going to need them. Unless I carb the 16... Which could be a possibility!

[mitch750]

Jarred help me out, are this alright for a k-jet?

so you havent used them oz? sorry i dont know much about carbs.. and the process involved in set up!

[mitch750]

my engine

[ryana89]

^That's a Digifant engine.

[Flea]

I had twin webbers on my Gemini, they always needed tuning.

I'd keep it injected. If you like the look, why not go for individual throttle bodies?

[mitch750]

psh, they just sound like a headache tbh.

ill look into the throttle bodies or maybe ill just leave it as is before i ruin something!

[jayjay]

I've tried mounting twin DCOEs on my counterflow 8v. It was an absolute pain in the ass. Most of the carbed 8v's you'll see on youtube are from Left Hand Drive car's, where the brake booster sits on the other side of the engine bay. On our cars (right hand drive) there is precious little room for a trumpet or air filter for cylinder #1, in fact, there's only about 3-4 inches from the end of the carb body to the firewall.

I've toyed with this same idea for a long time. These is all indicative pricing of getting someone to install it (cheaply i might add)

Carbs
- $1000 to buy
- $1000 to install, set up and tune/refurbish
- ongoing cost of re-tuning, etc

Individual throttle bodies (or really any standalone management)
- $2000 parts
- $1000 install
- $1000 tuning

This does not add up, unless you have a legitimate reason to keep your 8v, especially when 20v/vr6s are so abundant.

In terms of performance, there's a guy in the US who's running the most ridiculous home-brew 8v counterflow set-up, and he's only cracked 190whp. On methanol. At nearly 9000 rpm. with 15:1 compression.

An otherwise stock polo gti (20vt) which has been flashed will put out that much power. If you wanna go fast, any thing but your current motor will get there.

[gecko2k]

8V Carbs

Quick question for the pros here:

Let's say you do all the work yourself where possible, which conversion would be cheaper at the end of the day: 16V on ITBs or 20VT.

Skill level is not relevant apart from ITB tuning maybe.


Sent from my iPhone using Tapatalk

[ryana89]

Quick question for the pros here:

Let's say you do all the work yourself where possible, which conversion would be cheaper at the end of the day: 16V on ITBs or 20VT.

Skill level is not relevant apart from ITB tuning maybe.


Sent from my iPhone using Tapatalk

The ABF would be cheaper/easier, but less power potential.
After all, it was (too an extent) seemingly designed to go in a MK2/3

Depends who you're gonna source all those "extra" bits and pieces from.