New Air Cooled Engine
04-24-2016, 12:51 PM
#16
2-Valve Engine Update: latest set of camshafts are still in hardening process. This should be accomplished by the end of this week. The plan, however, is to begin dyno testing with the last set but with the other modifications made over the past months of engineering.
4-Valve Engine Update: latest head design to be reviewed tomorrow.
4-Valve Engine Update: latest head design to be reviewed tomorrow.
04-27-2016, 03:15 PM
#17
Latest Information on 2-valve, normally aspirated, air cooled engine: 442 HP and 442 Nm Torque – and this is without the newly designed camshafts which are still being hardened.
05-08-2016, 07:47 PM
#18
Update: the specially camshafts came in wrong for the fourth time from one of the world's leading camshaft suppliers. Given this, they sent a messenger yesterday, Saturday, to pick them up and we expect them back by Tuesday. Assuming the fourth time is the charm, I expect the engine to be run with them by week's end. Nevertheless, work on the 4-valve engine continues.
05-17-2016, 02:30 PM
#19
New camshafts in. 443.5 HP. Disappointing to everyone. Engineers working on several ideas including yet another set of camshafts. Do not want to increase RPM above 7400 on this engine. Am sure, we will reach at least 445 HP nevertheless. 4-valve version should go above 8500.
05-20-2016, 03:39 PM
#20
Good news. Latest dyno run of Cartridge 4 liter, 2-valve, normally aspirated, air cooled engine on street gasoline and with a catalytic converter produced 455 HP and 453 Nm of torque.
05-23-2016, 07:52 PM
#21
The news gets better. As we look at the engine, we are finding a few things that will gain, perhaps, one or two more HP.
The next step is to dismantle the entire motor, look for any problem areas or parts and, if any, correct. Thereafter, an entire new engine will be built for endurance dyno testing. Testing should be completed by the end of summer.
Assuming endurance runs show no problems, I will determine in what spec (level of lightness through the use of, e.g., carbon fiber and titanium) a complete engine and Bosch ECU can be sold and at what price.
The next step is to dismantle the entire motor, look for any problem areas or parts and, if any, correct. Thereafter, an entire new engine will be built for endurance dyno testing. Testing should be completed by the end of summer.
Assuming endurance runs show no problems, I will determine in what spec (level of lightness through the use of, e.g., carbon fiber and titanium) a complete engine and Bosch ECU can be sold and at what price.
05-24-2016, 07:28 PM
#24
Is this Brake HP and PS or SAE measured? What is the fuel consumption at peak torque and HP?
05-24-2016, 07:55 PM
#25
Rennlist Member
PM estimated price with donor 964 or 993 motor. For the 450 2 valve option. (really).
05-27-2016, 12:55 AM
#27
The 3.8L RSR engines made around 398 - 405 BHP depending on dyno's. They all seemed to perform about the same on the track. No one had any sort of engine advantage back then.
455HP even in SAE numbers is still up around 450. That's a quantum leap ahead with engine power.
05-27-2016, 06:55 PM
#28
Thank you.
By RSR, do you mean 964? In any event, the 2-valve engine we are doing functions on street gasoline with a catalytic converter. And the 4-valve engine we are working on is also intended to function on street gas and use a cat.
P.S. We are up to 457 DIN.
By RSR, do you mean 964? In any event, the 2-valve engine we are doing functions on street gasoline with a catalytic converter. And the 4-valve engine we are working on is also intended to function on street gas and use a cat.
P.S. We are up to 457 DIN.
05-27-2016, 07:04 PM
#29
A number of people have asked about using an older 964 or 993 engine in building one of the new engines (2-valve or 4-valve).
Unfortunately, given all of the parts in our new engines that are different from those in the older engines, the only part that might be used from an old engine is the case if it is in excellent condition. Virtually everything else is new and it would make no sense, financial or otherwise, to mix a few minor old parts into the new engines.
Unfortunately, given all of the parts in our new engines that are different from those in the older engines, the only part that might be used from an old engine is the case if it is in excellent condition. Virtually everything else is new and it would make no sense, financial or otherwise, to mix a few minor old parts into the new engines.
05-27-2016, 07:31 PM
#30
No. The last of the air cooled RSR engines. 993.