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RE: ignition upgrade
Dont know who sent the original but heres my thoughts.
> IMHO, I dont think they are needed, and both the ignition and
>throttle body would be a complete waste of money! see my web page
NOT. For the MOST part I agree about ignition upgrades on a stock
motor. Althought some mods can allow more efficient combustion which
gives more power. On modified Turbo motors they get to be more important
But TB upgrades can a do make a difference. On a STOCK 4kq NO.
But puttingh a 4kq TB on an old Coupe makes a Noticable difference. As
does a new TB on the A4 V6 12v. Very Noticable. And on a Modified 4kq
with a Cam it will help. Esp if the head gets ported like you mentioned
he should do. At that point, the TB is restricting Airflow into the
motor. But stock the head and Cam, exhaust are bigger problems.
> I know of VW motors (basically the same CIS) running 500hp
> nitro dragsters running off the stock ignition! There is no way you
>will notice a significant power increase, or even be able to compare it
>to a turbo swap!!!!!!!
This is very true. I'd rather just do a turbo swap but I have
seen NA Coupes and 4kq's run with ur-q's and Turboed 4ktq's. So it can be
done. And to do it you WILL need ported heads, Cam, TB, Exhaust, 2.3l
Motor with big Valve Head and higher Compression. Etc. At this point
ignition could help.
> Put your money into the cylinder head (ports,
>valve size, cam), exhaust, and even compression (NG motor) to get power
>first. Most after market VW tuners dropped their throttle body upgrades
>because they did not offer any upgrade on stock. Bosch has a great book
>out, it actually describes both the ignition and fuel systems, and talks
>about how they are
Yep, I agree. In Order I'd do Exhaust, then 4kq Manifold and DP
if you have a coupe, Cam or Port, Then Cam or port (I'd do both at the
same time), and then TB, THEN ignition upgrades.
1985 4000 quattro / silver / daily driver
1983 ur-q / black / fixing it up
1984 4000 quattro / modified/ awaiting Turbo Transplant.
1987 4000 quattro / Saphire Metallic Blue/ Girlfriend's
1996 A6q / Volcano / Dads Car
*****1985 5kt / PARTING OUT!