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Viceral · 01-15-2012, 12:22 AM

So I've needed to replace the engine in my 88 crx si and after doing a bit of research it seemed like the d15z1 with the hf transmission was the way to go. But just as I was about to get the engine, it got snatched up and I ended up with the 3 stage VtecE d15b instead, on t the advice of my very knowledgeable "car-guy." Basically he was saying that while B probably wasn't quite as fuel efficient, it wasn't much of a difference and well worth the additional hp. My question is what kind of economy could I expect from both of these engines in an otherwise stock Crx Si, and whether I should still go ahead with the HF tranny with the B?

01-15-2012, 12:22 AM	#1 (permalink)
Viceral EcoModding Lurker Join Date: Jan 2012 Location: Denver Posts: 12 Serenity - '88 Honda Crx Si 90 day: 41.7 mpg (US) Thanks: 2 Thanked 1 Time in 1 Post	D15B vs D15Z1 So I've needed to replace the engine in my 88 crx si and after doing a bit of research it seemed like the d15z1 with the hf transmission was the way to go. But just as I was about to get the engine, it got snatched up and I ended up with the 3 stage VtecE d15b instead, on t the advice of my very knowledgeable "car-guy." Basically he was saying that while B probably wasn't quite as fuel efficient, it wasn't much of a difference and well worth the additional hp. My question is what kind of economy could I expect from both of these engines in an otherwise stock Crx Si, and whether I should still go ahead with the HF tranny with the B?