gen 2 integra vx swap - Page 2 - Fuelly Forums
Thread Tools Display Modes
Old 09-09-2008, 07:29 PM   #11
Join Date: Oct 2008
Posts: 72
Country: United States
Location: Littleton, CO
So to sum up the advantages in practical terms, if I understand you correctly, the Y5 has more power and pollutes less. I would certainly expect an engine thats 7% larger to have more power and torque. On the other hand, I would then expect the fuel economy to be within 7%, in order to qualify as "similar mileage" However comparing the 96 HX to the 95 VX, the fuel economy is 20% less. If power is what you want, I agree the HX is the better choice, although IMO there are better, but if fuel economy is the overriding consideration, nothing touches the VX. Just my opinion.

nowhhs is offline   Reply With Quote
Old 09-10-2008, 09:56 AM   #12
Registered Member
suspendedhatch's Avatar
Join Date: Apr 2008
Posts: 445
Country: United States
Send a message via AIM to suspendedhatch
Loserkidwac, your swap/project is awesome and I wouldn't change to a Y5 because then you'd have to convert to OBD2 (I would only recommend this to people with a 96+ Del Sol). IMO you'd achieve a better result by pursuing those aero mods you mentioned in your build thread which I always keep an eye on.

The only similarity between the Y5 and Z1 heads is that they use the same cam. All of the Y5's superiority is built into the head design. The only exception is that the CKF is mounted at the crank. In order to use a Y5 ECU, you'd need this sensor so you need the Y5 block.

Originally Posted by nowhhs View Post
comparing the 96 HX to the 95 VX, the fuel economy is 20% less.
That is not a fair comparison. You didn't read my post closely because I mentioned that the HX is in a heavier, less aerodynamic chassis with larger wheels and with more accessories driven off the crank (ie power steering, air conditioning was more common than the VX). Take these out of the equation and the D16Y5 gets similar if not better mpg than the D15Z1.

Since we are talking about the D15Z1 vs the D16Y5, you'd have to compare a stock VX to a D16Y5 swapped VX. In that case the Y5 VX would get better mpg as well as all the other benefits I listed to the Y5 including more power and lower emissions. The Y5 is also more reliable. For instance if you have a small vacuum leak on a VX, you get bucking and all kinds of driveability problems. On an HX the OBD2 system is smart enough to back off the mixture and timing so you wont notice any driveability problems; just a drop in mpg and a CEL.

My car is a pretty good example of this. I've already taken this thread way off base and I apologize for that. But I will say that when I'm not tuning the car or driving the piss out of it, I get similar mpg to the stock engine using an engine that is very similar to the Y5.


Civic VX, D15Z7, 5 Speed LSD, AEM EMS, AEM UEGO, AEM Twin Fire, Distributor-less, Waste Spark
suspendedhatch is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Extreme front airdam - a test landspeed Experiments, Modifications and DIY 14 05-16-2008 07:38 AM
Is there a OBDI or OBDII conversion for older vehicles? kozaz General Fuel Topics 3 11-13-2007 07:32 PM
Advantages of owning an old car mrmad General Discussion (Off-Topic) 11 09-03-2007 02:13 PM
GS Meet Brenham, TX zpiloto General Fuel Topics 3 04-26-2007 07:04 PM
Hey people: enter your location in your profile please MetroMPG Fuelly Web Support and Community News 7 02-18-2007 07:58 AM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -8. The time now is 01:55 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.