Relentless
Well Known Member
Busy week at Titan Engines. Bart, Sue, and I are rounding third with Oshkosh preparations. I have so much to share but Ill focus this thread on status of R409 testing and experience with EFii system on R409. Over the past few weeks we have been focusing our efforts on fine tuning peak performance on R409 with AX50 cylinders. The new chamber is much more efficient than traditional cylinders so we wanted to get the most out them. One problem we where running into was lack of fuel at the top end. We tried our own ECi fuel system as well as brand B fuel injection. With these we were able to reach 229hp at 2800rpm and about 434lbs of torque at 2400, impressive but not quite what we expected. I had recently sold a X370 engine to a guy that wanted the new EFii system. So we agreed to install it for him with the assistance of Robert Paisley from Protech and run it on the dyno to break in engine. To our surprise the system was easy to install and even easier to fine tune the customers engine. After this experience I decided to order up a Dual EFii system for my RV8 and test it on the R409. Good decision, the power came up to 234hp and the torque jumped to 454lbs at 2400 rpm... Bart has been for the past two days and I can't wait to put this back on the RV8 this weekend, note the time of this tread.
Here are some pics installing a traditional cooling box on R409. I thought it would take massive modifications but a few carbon pieces and it went on quite nicely. That box has to be tight with this much horsepower. Stay tuned or better yet come buy Titan booth 268 in front of Building A at Oshkosh. If all goes well this week my Titan Rv8 will be center stage sporting a new R409 and all new EFii electric fuel and ignition system. Thanks Robert for pulling out all the stops to get me one of your systems in such short time!
Note total engine weight right off dyno 293.6lbs! To remind ya'll, the Lycoming angle valve 390 we tested a few months ago weighted in at 331lbs without baffling and only made 205hp
Efii system on dyno
R409 234hp at 2780rpm and 454lbs torque at 2400rpm
Fitting standard 360 Vans airbox to AX50 cylinders
One layup required on #4 cylinder, fits nice!
Carbon gap seals on bottom of cylinders works great
Here are some pics installing a traditional cooling box on R409. I thought it would take massive modifications but a few carbon pieces and it went on quite nicely. That box has to be tight with this much horsepower. Stay tuned or better yet come buy Titan booth 268 in front of Building A at Oshkosh. If all goes well this week my Titan Rv8 will be center stage sporting a new R409 and all new EFii electric fuel and ignition system. Thanks Robert for pulling out all the stops to get me one of your systems in such short time!
Note total engine weight right off dyno 293.6lbs! To remind ya'll, the Lycoming angle valve 390 we tested a few months ago weighted in at 331lbs without baffling and only made 205hp
Efii system on dyno
R409 234hp at 2780rpm and 454lbs torque at 2400rpm
Fitting standard 360 Vans airbox to AX50 cylinders
One layup required on #4 cylinder, fits nice!
Carbon gap seals on bottom of cylinders works great