Hi all. After a long adventure, i finally changed my old engine wich has some problem of torque and power
and putted in the car the PRV from the R25 V6 Turbo i bought last year from ebay in france for 100euros
In the auction i bought also the gearbox from the R25, wich is the UN1 with a shorter differential gears.
I begun to work to put the engine in the car in january, with the help of my mechanic and my friend Andrea (cineman )
We startet in january trying the engine on the shelf, with all his cabling and ECUs. After some trying we managed to start the engine easily.
So, knowing the engine was working we started all the process:
We changed the Lower Crankcase of the R25 engine, with one like the Delorean's one with his mounting point, and with the same oil cup. We modified the oil cup for having an oil return for the Turbo.
You have to be an insane person for doing such work. See our very professional attitude.
We opened the R25 gearbox and reversed the differential, for using the shorter gear in the delorean the correct way, and we modified the leverage for using it in the delorean.
Then we tooked out the original engine and gearbox, and putted in the new engine with the gearbox.
We cabled all the things like the schematics we had from Renault and like we did the first time...and then the engine didnt want to start at all for a pair of month
We checked everything, sensors, timing, compressione, we tried 3 different ECU and power ignition module with no luck. The engine was always making strange things, seeming it was out of timing, or too rich or other things...
In the end, we tried to change the original injector connector and the engine suddenly started firt turn.
Very very strange and still we dont know why the hell it was doing like that... maybe oxidation on the connector ?! but the injector were working...
However then we worked on all the other things.
We keeped the original exhaust tubing, putting the Turbos where the old cat was. We modified the original muffler for having the input from the Turbos and for staying in place. Maybe in the future I will change che muffler...but for now it was the fastest solution, and i like the engine not too noisy.
We putted an intercooler just down the Alternator (the 105A from R25), and modified various things from the original R25 air intake.
I changed also all the shocks with the new Ed Uding adjustable one, with also a new strut-bar and front springs and mounted the new aluminium sport radiator.
This is the quite final resoults:
testing pressure indicator
I'm trying the car this day with Andrea and i can tell that i'm very happy
until 3000rpms the PRV stays about in the atmo range, then the Turbos kick from 3000rpms to 6000rpms to 0.7 Bar, and it give a great accelleration and costant torque.
we tried also to not limit the pression from the turbo, opening the wastegate, and the engine gives a HUGE kick but is not roadable and safe to use it...Maybe we will put the max boost to about 1.0-1.2 bar in the future but for now is ok. I still dont have take time and power figure, but the car is VERY fast, he can do climby road in 5th gear
and when doing high speed a push of gas make you faster then you want
The works to do are still very much but finally i have a nice working engine with EFI, lot of power and no problem
I want to thanks my mechanics, Andrea (cineman), Florent who helped us to find ECUs from R25... and all the one who didnt believed it was not possible to do it, cause i'm smart
Here are some infos about the parts:
Engine Z7U 702 from a 1988 Renault 25 , 2458cc , 8.6:1 compression . Stock from R25 with 185hp.
EFI injection and accension and Even Firing PRV
Turbo Garrett T3 oil and water cooled
Gearbox UN1 from R25 with reversed differtial. 3.89:1 final, shorter gear.
Boosting setted to stock 0.7bar. We will put it around 1bar after some initial road testing.
Here you can find the complete photos album
http://picasaweb.google.it/Giascarcio/PRV25LV6Turbo#
http://picasaweb.google.it/Giascarcio/F ... OCOMPLETO#
If you have any questions, ask here to me or Andrea