Newb 91 CRX HF
 

Hello, been lurking for a few weeks. I just purchased a 91 CRX HF (unmolested) and from California for the first 17 years of its life. I have only been through 1 tank of gas so far, got 40.8 mpg BUT! the car does have larger wheels, 195/60/14 and i found out 1 day into my current tank that my right front tire only had 16PSI in it!!! So i am hoping for better results on this tank, i will find out tomorrow. I have also just purchased a federal ECU to put in and i have also purchased 4 used factory wheels, just need to blast and paint them and find some good tires. Every tire store around here only sells the 175/70/13 should i do this, buy the 165/70/13 on the internet, or the 155/80/13. Hoping to get some insight from others on here, if it helps the rims i found were 13x5 not the original 13x4.5 I am hoping also that the federal ECU gives me a slight boost in mpg also. I have been doing alot of engine off coasting and engine on neutral coasting and trying to maintain 55-60mph on the highway. I am typically a 90% hwy driver averaging 65-75 miles a day. I bought the CRX because im sick and tired of my v6 ranger getting 15.5 -18 mpg. The way i see it the CRX will have paid for itself in 10 months. I did have to pay a premium for the car 2,000 mostly because they are extremely rare, and its unmolested, new exhaust freshly rebuilt engine and VERY little rust only in the typically quarters none anywhere else. Well i plan on inputting as much to this forum as i can, enjoying reading everyones stories, and everyones help!!

Thanks!

CRX HF envy. I has it. Post a pic or 2!

As for tires, I'd say: keep the 14 inch rims and get some gen. 1 Insight tires - 165/65/14 Bridgestone Potenza RE92's. Ben (SVOboy) put them on his CRX and was amazed at how nicely they roll.

Did you account for the larger tire size (if they actually are.. just guessing here) throwing off your odometer reading? It would have caused it to under-report, making your calculated MPG lower than actual.

And - welcome to the forum.

ArinCRX -

Welcome to EM! What MetroMPG said. I use sites like this to correct my MPG calculations in my fuel log :

Tire size calculator

I cross-reference the odometer against a portable GPS to verify what the tire size calculator says.

CarloSW2

yes...
 

Yes I did account for the tire difference, I don't have my sheet with me to get an exact # but its between 2 & 3 MPG (too low) difference. So you would keep the 14's?? I would love some vx wheels but wow they are hard to find

I think you will find that LRR tires > wheel weight. The RE92's are hard to beat for LRR.

todays fill-up
 

Well with the increased PSI in my tires and even more eoc, and trying to keep it at 55-58 MPH I got 45.39 MPG I'm pretty happy with that. Also this was in cold weather, I will be installing the federal ecu Saturday, we shall hope that helps another 3-4 MPG.

yes, go with the 14 inch rims.

I bought a 91 CRX HF a few weeks ago also. The brakes are locked and the engine has a miss and it needs exhaust work. Nice car, no time yet to fix it.

welcome to em

The civic HX, 4 bolt civic hybrid (first generation) and Honda Insight rims are all pretty decent 14" rims, the civic HF rims are not only narrower but lighter weight compared to other steel rims, the VX rims I think are the only common alloy rims that will be a direct fit, 155/80R13 tires are not avalible as low rolling resistance tires, 175/70R13 are and there is debate but it seems like it is worth going with a wider LRR tire over an unknown narrower tire, of course some of that can be made up if you can get a higher max side wall pressure, of course if you go over that side wall pressure you are doing so at your own risk.

Sorry to open an old thread. But, I have a 90 CRX HF. I have 185/60/14 tires on mine and I am getting mid to upper 40's. I am running Yokohama Avid TRZ tires. They are NOT LRR tires. I get my correct miles traveled by dividing the indicated by .9715. I had a bunch of issues initially. The PO had a SI ECU in the car. The EGR ports in the intake were very clogged and the EGR valve was sticking. It is running great now and my mileage has finally kind of become consistent. I think I would go to the 13" wheels and the proper size tires if I had to do it over again. I want to put rear wheel skirts on the car but the 14 inch wheels stick out a bit too much. I will have to curve the skirts out a little.