I'm going with an 0-235 just because I have one

Lucky you Paul, The installation should be similar with the exception of injection. Is your engine complete with exhaust manifold, oil cooler muffler and etc. What cowling?, prop?

Ron,

I have selected the IO-233 as well.  I understand it uses a dynafocal mount which I purchased from Zenith along with the cowl.  I also am sending my R wing tank back to Zenith to install a fuel return plumb point in the top of the tank.  I have a lot of hours behind Lycoming and feel it will be a very reliable engine option. 

I understand the dry weight is 197lbs. which is a bit heavier than Jabiru (182 lbs)

Tom Palmer

I dont have an exhaust or oil cooler. i plan on a remote cooler and will more than likly  build my own exhaust (4 into 2 without a muffler) unless something turns up. I have an alt. from a GEO STORM that I've made a mount and bracket for, and a light wt. starter. I'll be building my own mount also (strat not dynafocal) 

IO233 price sheet format is little messed up from cut/paste.

Roller Tappet System (most Models)                                                                                         No Charge

Automatic Upgrades           Crankshaft Dynamic Balancing                                                    No Charge

                                                Precision Static Balancing (Pistons and rods to ½ gram)          No Charge

                                                Port and Polish/ Volumetric Cylinder Matching                           No Charge

Oil System                             Christen Inverted Oil System (minus hoses)                          $1,000

                                                 Sky Tec L/W Inline Starter                                                     $   475

Starter                                    Sky Tec L/W High Torque                                                      $   475

                                                    Airflow Performance Injection                                               No Charge

Fuel Injection Systems          Precision Silver Hawk Injection                                             No Charge

                                                 Slick (1 L-Imp 1 R- STD)                                                        No Charge

                                                Retard Mag (ea) substitute for Impulse Mag                          No Charge

Ignition                                   2^nd Impulse Mag (ea) instead of Plain                                     $    380                                                                         Delete one side of ignition system                                          $  - 300

                                                Delete entire ignition system                                                     $  - 600

                                                Thunderbolt Show Gray                                                           No Charge

Engine Color                         Gloss Black                                                                             No Charge

                                                 Two-Tone Show Gray/Gloss Black                                        $     200

                                                Custom Color (most colors)                                                    $     200

                                               Two-Tone custom colors (most colors)                                   $     400

                                                Rocker Box Covers                                                                 $     425

Chrome (4 Cylinder)           Intake Pipes                                                                             $     355

                                                Push Rod Tubes                                                                      $     535

                                                Full Chrome Kit (includes all above)                                       $  1,100

                                                Rocker Box Covers                                                                 $     687

Chrome (6 Cylinder)            Intake Pipes                                                                            $     483

                                                Push Rod Tubes                                                                      $     800

                                                Full Chrome Kit (includes all above)                                       $  1,800

Thunderbolt Engines 2010 Price Sheet

What if you've already built your wings? How can you run the return line for a Fuel Injection? Just curious if anyone has done this.

That's me. Wings are done and painted when I decided on the IO-233. I,m not wanting to cut into my wing where the tank return that I pluged is located. But here is my theory. The return flow is always going to be less than the flow from the tank obviously since it cant pump more out than is commimg in. The return head pressure at the pump would be sleightly greater than the the fuel supply pressure at the pump since the head of the return at the tank is slightly above the gas level in the tank. So why not connect the pump return into the supply line just before the gas colator instead of running a separate line to the tank? The flow from the tank would be decreased by the amount of the pump return and the supply line pressure may increase some minor amount which would be benificial. I would appreciate comments on this theory.

I belive that is a safeer and simplier wat to return fuel, hopefully you have valves to each tank. If you return fuel only to one tank there is a possibility of overfilling that tank in flight. The plane I have now tends to use fuel from the left tant more then the right and at fifst I was dumping fuel in flight. Now I run the right tank to about half then switch to both, I beleve this is due to a higher vent presure in the left tank. Also since I prefer not to use airports my plane is sometimes parked on uneven ground, if you can"t keep the fuel from going down hill one tank may overflow. Fuel lines and systems need to be safe and simple. good luck

Ron

We have a CH 750m do you know if there is a firewall forward kit for it?

Bruce