For those who dont believe in turbocharging the 2.0 DOHC

GsiTurbo · Post by **GsiTurbo** » Sun May 21, 2006 5:10 am

Found these photos on the web, and thought I must share. This is one impressive build-up...I just dont get non-adjustable cam gears. I mean, whoever build this up, does have some cash to spare, and I do not mean spare change. So the only explenation is that there are no gains?? But then again, if it was me, I'd put them on, even if its for the looks only.

Motor A, with drysump and internally wastegated T3/04 sized turbo

Motor B, with something much larger....

oh yeah!

Dyno graph, but I dont know what motor it is
After conversion from metric system, it made:

284 hp & 301 ft-lbs of torque. Note the 2nd plot line from the bottom...this represents EGT temp in C, while the one below is in my believe drivetrain/tires power loss as a function of power and rpm. Quite interesting.

Below is also a vid (24MB) of turbocharged Opel Speedster. Note the speedo needle position...also, the two gauges in the centre console. The top one appears to be oil temp, bottom one the EGT (both in C degrees)

Right-click and Save As

Tom

exist3nce · Post by **exist3nce** » Mon May 22, 2006 6:44 pm

nice find. Is it the the same 2.0 DOHC from the Optra?

GsiTurbo · Post by **GsiTurbo** » Mon May 22, 2006 9:55 pm

A variant of the motor found in the Opel Speedster, with lower compression pistons. But otherwise identical.

Joso · Post by **Joso** » Thu May 25, 2006 9:41 am

Nice engine and nice car

Do you know the max. speed the car reaches?

aveosam · Post by **aveosam** » Fri Jun 02, 2006 12:57 pm

GsiTurbo wrote:A variant of the motor found in the Opel Speedster, with lower compression pistons. But otherwise identical.

how come when I look up opel speedster it tells me that it has an ecotec engine in it? is the u20sed an ecotec? is it the same ecotec as cobalts or is this different?

GsiTurbo · Post by **GsiTurbo** » Fri Jun 02, 2006 1:30 pm

North American Ecotec and European Ecotec, apart from the name, have nothing in common.

aveosam · Post by **aveosam** » Fri Jun 02, 2006 1:34 pm

ok cool i figured they were different i was just checking

Post by **Efratech** » Fri Jun 02, 2006 2:22 pm

the first difference is that the 'american' ecotecs are chain driven... these engines were used for the BTCC Astra touring cars for 4 years in a row (about 300bhp NA), i dont know if they're using it on the same engine on the new Astra

exist3nce · Post by **exist3nce** » Mon Jun 05, 2006 3:01 am

GsiTurbo wrote:A variant of the motor found in the Opel Speedster, with lower compression pistons. But otherwise identical.

Would I be able to use parts from such an engine to build up my u20sed? low comp pistons for example?

aveosam · Post by **aveosam** » Mon Jun 05, 2006 4:43 am

would a Courtenay Sport Power Cap fit and work on a U20sed engine?

GsiTurbo · Post by **GsiTurbo** » Mon Jun 05, 2006 4:52 am

Nope, only XE model.

Roadrunner 16V · Post by **Roadrunner 16V** » Sat Sep 23, 2006 9:33 pm

the speedster had a Z20LET engine with Z20LEH pistons. kompression is 8,6:1

gse_turbo · Post by **gse_turbo** » Tue Sep 26, 2006 1:24 am

i agree with tom on the cam gears, so tom, before i can make the 600bhp i'm gunning for you'll need to help me find a set!
Garrett

AND YESS!!! I WILL SEE 600BHP!!!