16v engines for mk1.... (subject now)...head refitting

TassieGTi · 08-07-2005, 10:03 AM

1.8 Inlets are the smaller ones whether left or right, whereas the 9a 2.0 is the bigger one.
Big is not always better and light flywheels are awful on road cars driving around the street.

black betty · 08-07-2005, 01:29 PM

early kr (1.8 ) from golfs in the late 80's had 50mm inlets

in the uk i have owned kr 1.8 with 50mm inlets and a 1991 passat 1.8 with 40mm inlets

the 50mm inlet car had less torque but revved harder and had much more power at the tope end

hope that helps

Golfwise · 08-07-2005, 01:42 PM

Sometimes we forget that other places are flat whereas we have lots of hills in Tassie even our local race track has a whopper so torque to us is good.

**GoLfMan** · 08-07-2005, 02:08 PM

Originally Posted by Golfwise

Sometimes we forget that other places are flat whereas we have lots of hills in Tassie even our local race track has a whopper so torque to us is good.

i think torque is good fullstop!!!! you dont wanna always rev an engine to the stratosphere to reach its full potential.

**finemk1** · 08-07-2005, 03:46 PM

measured mine up and there the 40mm ones with TB on the left side this has got me thinking in i want the 50mm one now but you say the 9a motors had the intake on the right side, do 50mm left side intake manifolds exsist?

the 50mm inlet car had less torque but revved harder and had much more power at the tope end

so using a 40mm intake and a lightweight crank pully and windage tray could result in the same top end revs as the 50mm thus keepin the low down torque of a 40mm?

black betty · 08-07-2005, 05:50 PM

you can get 40mm and 50 mm inlets for both sides

throttle body mount on right side are generally found on scirroco 16v's in europe and us

most other models i.e. corrado, golf, ibiza and passat have throttle body mount on left hand side (as you face the engine from front of car)

scirroco inlets are usually more expensive (esp 50mm ones) as are used in 16v g60 conversions as well as mk 1 16v conversions

**Golf Loon** · 09-07-2005, 12:01 AM

Originally Posted by black betty

early kr (1.8 ) in the uk i have owned kr 1.8 with 50mm inlets and a 1991 passat 1.8 with 40mm inlets

the 50mm inlet car had less torque but revved harder and had much more power at the top end

So If I have a 2L with the 50mm inlet and a lightened flywheel, will that make it have more go from the offset?

I have a feeling its going to be largely psychological. Any 16v in a Mk1 will be a lot a fun and feel even faster than it is.

black betty · 10-07-2005, 01:50 PM

i d go the 50mm ones

this can be a controversial area though

do a search for this topic on clubgti uk forums

a guy known as GVK has done the transfer on a 2.0 9a from 40 to 50mm

he always has it rolling roaded and results will be up there somewhere

good luck

VanKronenburg · 10-07-2005, 08:21 PM

Originally Posted by TassieGTi

1.8 Inlets are the smaller ones whether left or right, whereas the 9a 2.0 is the bigger one.
Big is not always better and light flywheels are awful on road cars driving around the street.

The later KR and SEAT spec 1.8 16v Digi 2 ADL motors also came with a 50mm intake, so it wasn't just the 2.0s

VanKronenburg · 10-07-2005, 08:24 PM

Also, you don't need the 'Rocco intake for plug lead clearance. I used a Saab 900 16v 90deg exit dizzy cap instead of the stocker and it cures any problems. There are a few others that fit but the Saab one is the only one I've tried personally.

10lb flywheel is a good compromise with an 02A, as is an 8lb with the 020.