1.8t Drag beetle
Posted: Tue Jul 29, 2025 4:55 am
After damaging my 1600 turbo engine over winter I put in a 1.8 20vt engine from a passat in the back of my beetle,
its a APU engine from a 1999 passat using some parts from a mk3 golf tdi sump oil pump alternator etc, with a set of aftermarket con rods and some N/A 20v Cams (higher lift) it has a gt35r turbo and 1400 cc injectors on E85
The Gearbox is a 5 rib with weddle gears (3.11 , 1.93 , 1 .22 , 0.93 with a 4.57 final drive) and a spool
The adaptor plate is an aluminium one made in the 80's in germany and it uses alot of B1 audi 80 parts and was designed to fit a mk1 gti engine in a beetle and it used audi 80 pressure plate and clutch disc, I had to drill and tap the flywheel to allow me to use a beetle style pressure plate and use a 21mm spacer to set the height its now got a stage 3 kennedy with a RLR black magic disc
It has a small aluminium radiator designed for a old Mini which i put larger inlet and outlet on and a fan that i have set to run all the time.
Current PB from the weekend is [email protected] I had it on the dyno with the old pressure plate (from an audi 80 1.6td) unfortunately it slipped at 340hp I also found that I had an issue with the cam timing after the dyno (I had it set one tooth advanced on the inlet cam) which made it very laggy fixed that and it went from running high 12's straight into the 11's
its a APU engine from a 1999 passat using some parts from a mk3 golf tdi sump oil pump alternator etc, with a set of aftermarket con rods and some N/A 20v Cams (higher lift) it has a gt35r turbo and 1400 cc injectors on E85
The Gearbox is a 5 rib with weddle gears (3.11 , 1.93 , 1 .22 , 0.93 with a 4.57 final drive) and a spool
The adaptor plate is an aluminium one made in the 80's in germany and it uses alot of B1 audi 80 parts and was designed to fit a mk1 gti engine in a beetle and it used audi 80 pressure plate and clutch disc, I had to drill and tap the flywheel to allow me to use a beetle style pressure plate and use a 21mm spacer to set the height its now got a stage 3 kennedy with a RLR black magic disc
It has a small aluminium radiator designed for a old Mini which i put larger inlet and outlet on and a fan that i have set to run all the time.
Current PB from the weekend is [email protected] I had it on the dyno with the old pressure plate (from an audi 80 1.6td) unfortunately it slipped at 340hp I also found that I had an issue with the cam timing after the dyno (I had it set one tooth advanced on the inlet cam) which made it very laggy fixed that and it went from running high 12's straight into the 11's