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cbaber · 03-23-2012, 08:52 PM

Whats in the car now, a B18C Vtec or B18A/B18B non-Vtec? I hate to burst your bubble but 32 MPG in your current car is probably better than you will do with your new CRX. B-series engines are designed for performance, not economy. The B16 block you have developed about 170HP in its original form. Hardly qualifies it as being economical. Whats even worse is if the current motor in your car is non-Vtec b18. A non-vtec head on a b16 block will not be fast or economical. The only good thing that I can think of from having the non-vtec motor in your car now is that you probably have the tranny from it to. The b18 non-vtec transmissions are geared taller than the B16 and B18C's which will aid in fuel economy.

The 1.6L size is misleading in this case. In my civic I have a 1.6L but its a D-series. I can get over 40MPG but a B16 (no matter what head) will not achieve this. I had a couple of cars with B series motors. A had a civic hatchback with a B18B in it. Around 28-30 MPG was normal. I had an Integra with a B18C. Could get around 28-30 also. You will get better than those because of less weight in the CRX chassis, but no where near 40MPG. You need to find a D16 engine. With that light of a car, any D16 engine will get you around 40 MPG.

By the way, I noticed you were looking for a VX engine. If you are willing to rebuild it, I have a 1998 Civic HX D16Y5 longblock sitting in my garage. The #2 cylinder is bad. Only about 25 psi compression. But it did run until I pulled it out for a new engine.

03-23-2012, 08:52 PM	#3 (permalink)
cbaber Master EcoModder Join Date: Feb 2012 Location: Missouri Posts: 540 Lean and Mean - '98 Honda Civic HX Team Honda 90 day: 46.69 mpg (US) Thanks: 30 Thanked 190 Times in 110 Posts	Whats in the car now, a B18C Vtec or B18A/B18B non-Vtec? I hate to burst your bubble but 32 MPG in your current car is probably better than you will do with your new CRX. B-series engines are designed for performance, not economy. The B16 block you have developed about 170HP in its original form. Hardly qualifies it as being economical. Whats even worse is if the current motor in your car is non-Vtec b18. A non-vtec head on a b16 block will not be fast or economical. The only good thing that I can think of from having the non-vtec motor in your car now is that you probably have the tranny from it to. The b18 non-vtec transmissions are geared taller than the B16 and B18C's which will aid in fuel economy. The 1.6L size is misleading in this case. In my civic I have a 1.6L but its a D-series. I can get over 40MPG but a B16 (no matter what head) will not achieve this. I had a couple of cars with B series motors. A had a civic hatchback with a B18B in it. Around 28-30 MPG was normal. I had an Integra with a B18C. Could get around 28-30 also. You will get better than those because of less weight in the CRX chassis, but no where near 40MPG. You need to find a D16 engine. With that light of a car, any D16 engine will get you around 40 MPG. By the way, I noticed you were looking for a VX engine. If you are willing to rebuild it, I have a 1998 Civic HX D16Y5 longblock sitting in my garage. The #2 cylinder is bad. Only about 25 psi compression. But it did run until I pulled it out for a new engine. __________________ 1998 Honda Civic HX - My Project Thread Last edited by cbaber; 03-23-2012 at 08:58 PM..