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FR Fitting instructions • 250hp kit • R5 Turbo competition
Renault 5 Turbo — Official 250hp Kit Fitting Instructions
April 1982 • Competition performance kit • C7K Turbo engine • Official Renault fitting procedure
250 hp
Competition kit
C7K Turbo
Garrett T3
April 1982 edition
Presentation of the R5 Turbo 250hp kit fitting instructions
The Renault 5 Turbo 250hp kit fitting instructions are the official Renault technical document published in April 1982 detailing the complete installation procedure for the competition preparation kit taking the 840-730 engine to 250 hp. This document is intended for competition mechanics working on the Renault 5 Turbo entered in rally : it precisely describes all the modifications to be made to the standard 160 hp DIN engine to reach the kit's target power, including the engine components, the turbocharging and the fuel supply circuit.
This 250hp kit was designed in the context of Group B homologation and the French Rally Championship events. It covers the cylinder head modifications, the specific timing, the forged pistons, the turbocharger upgrade and the injection adjustment, building on the solid mechanical base of the C7K engine. It accompanies the R5 Turbo performance parts available on our site.
General technical characteristics
Document reference
| Document type | 250hp performance kit fitting instructions |
| Publisher | Renault / Renault Sport |
| Publication date | April 1982 |
| Model covered | Renault 5 Turbo — 840-730 R8220 engine |
| Application | 250hp competition kit — Group B / Rally |
Full fitting instructions
Contents of the fitting instructions
The instructions cover the entire procedure for installing the 250hp kit on the standard 840-730 engine:
| Chapter | Contents |
| Presentation of the 250hp kit | Kit contents • Parts included • Engine prerequisites |
| Cylinder head & timing | Prepared cylinder head • Specific camshaft • Timing adjustment |
| Pistons & rings | Forged pistons • Reduced compression ratio • Fitting and clearances |
| Turbocharger | Garrett T3 upgrade • Adjusted wastegate • Boost pressure |
| Fuel supply & injection | K-Jetronic adjustment • Injector flow rate • Base pressure |
| Cooling | Air-to-air intercooler • Turbo oil circuit • Water radiator |
| Adjustments after fitting | Running-in • Tuning • 250hp check values |
C7K Turbo engine base
| Parameter | Standard (160 hp) | 250hp kit |
| Power | 160 hp DIN | 250 hp |
| Displacement | 1,397 cm³ | 1,397 cm³ |
| Turbocharger | Garrett T3 A/R 0.36 | Upgraded Garrett T3 |
| Injection | Bosch K-Jetronic | Retuned K-Jetronic |
| Gearbox | 5-speed — type 369 | Reinforced 369 |
250 hp
+90 hp
April 1982
840-730
Competition
Group B
Additional Renault 5 Turbo technical documents
To complement these fitting instructions, find all the R5 Turbo technical documentation available on the site:
| R5 Turbo MR221 repair manual | K-Jetronic injection technical manual |
| R5 Turbo technical training — 1980 edition | R5 Turbo 2 technical manual |
| R5 Turbo owner's handbook | Wishbone bush guide |
For the preparation of your C7K engine, also find theR5 Turbo 265hp camshaft, the R5 Turbo forged conrod and the200hp R5 Turbo intercooler available in stock.
Looking for parts for your Renault 5 Turbo?
C7K engine, Garrett T3 turbo, K-Jetronic injection, performance parts — our catalogue covers the full range of R5 Turbo references.