jpmelfi
Senior Member
- Joined
- Nov 17, 2016
- Threads
- 23
- Messages
- 565
- Reaction score
- 627
- Location
- New Jersey
- Vehicle(s)
- CTR #706, 07 S2k
The mono scroll turbocharger combines with cast aluminium pistons, aluminium VTEC rocker arms, forged conrods and a lightweight crankshaft to minimise the overall weight, size and rotational mass of the engine.To add to what Brian mentioned. A few pros/cons and info for those not familiar:
E85 (Vegetable Race Gas)
+Pros
+Yes, it makes more power than typical premium pump gas. Generally, you can run more timing and boost safely.
+Burns cooler than gasoline (lower engine temps and intake temps)
+If not E85 capable from the factory - the car must be tuned. Tuners can make the car much stronger with it!
+Could be used with water/meth injection for even higher boost levels (See turbo efficiency below for downside)
-Cons
-More fuel has to be injected into the cylinder by an increase of 20%-30% resulting in worse fuel economy. Stock CTR fuel pump and injectors may or may not have enough flow to use E85. In time, we will know.
-E85 does not have lubricating properties like gasoline, fuel pump life shortened (I learned from experience). Injectors? Nothing has happened to them yet.
-Using a stock or small turbo and increasing boost takes these turbo's out of their efficiency. More boost = higher intake air temps
-Running high boost? Use meth/water and consider a larger intercooler. Both not necessary, but will help reduce heat soak and IAT.
Brian is on the right path. Although, the turbo will be an eventual choke point for more power, ultimately the engine is the limitation. Honda put R&D into the motor for enthusiasts to enjoy for a daily use and/or on occasional track days. We will find out what the limits are of the factory block and internals. Remember this is a mass produced engine. I did not read that Honda put forged internals (I could be wrong here), titanium etc into the motor for durability. That usually costs more money and therefore so does the product.
Lastly, about the stock boost pressure and lag. From what I have read from FK2R reviews and tests, 17 lbs of boost is what I have found. With higher summer temps and higher humidity in the US the ECU might increase the boost to keep power consistent. Increasing the boost pressure on the factory turbo shouldn't have more turbo lag.
I have checked CTR and competitors' compression ratios, bore and stroke, weight, stock boost pressure etc to see what type of power gains are reasonable. It was interesting.
That is the info for the engine in the FK2 civic. Maybe they updated some intervals for the FK8... But it's probably the same internally
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