4agze rebuild Options

[Corolla_TC]

Hello everyone. My name is Brandon and I have a 1994 Corolla with a 4agze swap that we are rebuilding and twincharging.

E58 manual transmission w/ LSD
ae92 4agze bottom end
HKS head gasket
4age "blue top" bigport head and intake
SC12 modified to fit
TOGA HV oil pump
RX7 550cc injectors
Garrett T3/T4 50 trim turbo
Garrett fmic
HKS SSQV
Tial 38mm wastegate
Tubular manifold
Techno Toy Tuning adjustable cam gears
WRX spark plugs
Greddy profec EBC
AEM fuel and ignition controller


Old twincharge setup and pics



Rebuild progress

pulling the old motor


engine pulled


assembled and ready to go back in


putting it back in


new motor in

[Culpable04]

the VW set-up is designed with fuel economy in mind, not performance, twin charge + performance = fail, the supercharger will be taking more power than it can produce at higher RPMs thus, stealing for the turbo. Twincharge will have a great powerline tho. but if top end power is what you're after you should get rid of the supercharger.


This is an awesome project, I was thinking about a 4agte using a 4agze bottom and blue head and a GT28RS turbo, I even have a E58 tranny sitting around.

Good luck with everything,

[shubert_ae102]

the VW set-up is designed with fuel economy in mind, not performance, twin charge + performance = fail, the supercharger will be taking more power than it can produce at higher RPMs thus, stealing for the turbo. Twincharge will have a great powerline tho. but if top end power is what you're after you should get rid of the supercharger.


This is an awesome project, I was thinking about a 4agte using a 4agze bottom and blue head and a GT28RS turbo, I even have a E58 tranny sitting around.

Good luck with everything,

the vw twincharged was not designed with just economy in mind , yes it can get 40 miles a gallon , but 170 hp and more in tq. is very high for a low boost 1.4 liter. the instantanious and continuous torque that keeps building in this setup is the winning factor , as described here:

http://www.automobilesreview.com/reviews/vw-jetta-gli/37/

i did about 80% of the designing and work on this particular engine and setup in this thread , and people in australia (before the vw market twincharge) have done this with upwards of 300 whp , with just a gt25. the main deciding factor on this build was the want for a 300+whp car with outstanding pull throgh out the rev range.

by boosting through the s/c ( like most twincharged gze's)theres also a lot more switches , controls , etc. to work out in the design also (not to mention the ginormous amounts of compressor presuure differences with s/c after throttle and turbo before throttle). with the s/c boosting through the turbo (s/c>turbo>intercooler), its a strait forward process , with no restrictions as far as the sc12 being able to turn the volume of air the turbo will be producing(like in turbo>s/c>intercooler).

yes super chargers can "multiply" boost , but a small 920 cfm per revolution sc12 isnt the s/c for the job. but however pushing its factory boost thru the turbo( 10 lbs) till the turbo spools (and then well after while the turbo is spooling , kind like feeding the turbo 10 lbs. of boost) ,it puts no limitations or restrictions in the system. the s/c and turbo both are free to spool whenever. one or the other at different rpms , or both in high rpms.

This post has been edited by shubert_ae102: May 25, 2009 - 1:45 AM