dzl

I can't find ---- for a comparison on this and I'm figuring its became a matter of "what you find will work" but maybe one of you can confirm.

My build will be pretty ------- basic. Right now I'm just looking for a block, I'll end up throwing this in either a CRX or a EG, whatever shell I find at the right price. Whatever block I go with will be your basic vitara\eagle setup with a GT28.

My question is on head design. I've read that the A6 head flows better than the Y8 and Y7. That doesn't seem right to me but maybe someone can confirm around here? Is it worth holding out and waiting for a Y8/Z6 versus the A6? And my last question is will I have difficulty making a Y8 (if I were to nab one) work with ODB-I? I haven't researched that yet but it would probably be an easy question for one of you.

I found a lead on a 98 HB around here that has mismatched body panels, blown shocks and a blown transmission for $500. If I can pick it up, then I suppose its Y8 time.

edit: if this should be in the hybrid section my bad, wasnt sure which.

Thanks.
Joshua


edit #2: jeff just cleared ---- up for me.

https://www.homemadeturbo.com/forum/...threadid=27914

Z6 it'll be.

Tom-Guy

Wrong, the A6 flows best. A Z6 making more power is a reflection on camshaft, increased CR, and IM.

If you are going to build an engine.. a Delta 272 regrind for an A6 runs $75, and you can get Z6/Y8 IMs for free if you ask around.

I'd save all the ------- around and build an A6. Get a B-series TB port matched to fit, and your intake tract is done.

FYI, AVOID AVOID AVOID hybrid engine combos using a mixture of D15/D16A/D16Z/D16Y parts unless you know absolutely what you are doing. There is a lot of ---- out there that will bolt up like it was meant to be there that will throw mechanical timing way the hell off and you be confused. Cam gears, cams, crank pulleys, etc, change around a lot.

BTW, if you go A6 keep in min that '88 A6 cam is cut on the D15 index and has the corresponding cam pulley... you can ---- ---- up mixing and matching with later A6 stuff.

dzl

Thanks Joseph. Why are people giving away the IMs if they're the best combo? I didn't have any plans on doing a hybrid combo.

I was stoked earlier today, I had found a 98 HB that had rear ended someone. The front end was mixed and matched and the door locks were fucked, blown shocks, and bad transmission. Only $500 bucks though. It was the perfect egg for my project but it looks like they've already sold it.

Tom-Guy

Uh, D-series occurred in 95% of Civics for almost 15 years. D-series stuff is everywhere, and a crummy IM is free if you keep your ear to the ground and ask around, are cool with people, etc. I give ---- like that away, personally.

dzl

Well, making progress. Found an the Y8 IM from a guy on here for $60 bucks. I don't know people well enough to grab it for free yet. Also found a guy on another board selling a D16A6 w/tranny from a 91 crx si for $200. I think he is on here too.. not sure. Anyways, going to get back to him tonight and hopefully pick up that combo. Woot.

I know Joseph, you're so ------- excited you can't hide that boner of yours. I mean, ----, a D16 build, thats never happened before.

Tom-Guy

LOL

dzl

Another gay question. I've noticed a bunch of decent CRX chassis' for under $200 bucks but they're all first gens. I know some of the first gens were carbed, but a D series regardless. Will I run into ECU issues? I can't seem to find anything saying so, but I don't want to assume and get myself into a wiring mess.

Tom-Guy

It's pre-OBD0 if you get a fuel injected one. They are D15A3, more properly EW3 engines. The interchange of parts with later drivetrains is like the parts interchange between ZC and LS.

SunshineSketches

its more common to do a browntop or blacktop 86-89 integra d16a1 swap into those first gen rexes. www.redpepperracing.com is a pretty good resource for those.

for the more modern d's i would stick to an 88-91 crx

here is a little writeup i made years ago on sohchonda.com

Honda D16 vs. D15, 4th gen vs. 5th gen


Sure when asked you can say how the d16 is different than the d15 you can say it has a different stroke, different rods and crank, different compression height on the pistons. But what are more of the obvious things that are different? You may wonder why someone would need to know what all is compatible between the d15 and d16? In my case I bought a bare d16 block and only had parts from a d15 to piece it together. On this journey I learned a lot about little incompatibilities that could have been avoided ultimately saving time and money.

Differences:
(mainly based on the 5th gen D16Z6 and D15Z1 vs. 88-95 D15 engines)

Timing belt tensioner: the same on the D15Z1 and D16Z6 ONLY D15BX and D16A6 share a larger diameter tensioner and different style spring. The D16Y series have a different part number all together.

Timing Cover: 88-95 D15BX are the same, D15Z1 and D16Z6 appear to be the same. You cannot interchange the 88-95 timing cover with the 92-95 vtec models, they aren't compatible.

Oil pan and Pickup: I ordered a D16Z6 oil pan and pickup from a wrecking yard and upon receiving them i compared to my D15B8 parts, the pickup was more shallow and I assumed the pan was shallow as well. The bolt pattern between them is the same however. From this I can say all 88-95 oil pans and pickups bolt patterns are the same. I do not know about the 96-00. Just be aware there are different pans/pickups out there.

Waterpump: This is confusing to me. The D15BX water pump shares the same part number as the D16A6. This pump is not compatible with a D16Z6 or D15Z1 (These share their own pump) The D16Y8 is the same as a Z1 and Z6. The Y7 has a different part number. I do not know about the HX

Motor mount (Driver side): D16z6 and D15z1 are different than the other 92-95 D15's. I think that the 88-95 D15 all have the same mount, minus the actual motor mount part that bolts on. Looked at a d16y7 mount and it appears to be the same as the z1/z6 mount.

Cam Gear: 88-95 are all the same, 96-00 same

Crank Pulley: i have ran into different pulleys, one of mine has 5 timing marks on it and in my honda books it says they should have 4 timing marks. I do not know the details on this. 5th gen has a 4 V 4th gen has 3 V (on alternator)

Alternator and Mount: The alternator is the same 88-95 but pulley is different, see above. The lower mount is compatible 88-95 as well as the upper one, i noticed the 88-91 upper mount is missing a hole that is used in the 92-95 to hold the wiring harness.

Oil Pumps: According to part numbers, all the engines share the same oil pump in their generation. The 88-91 all have the same part number. 92-95 same, 96-00 same. Pretty sure 88-95 are the same.

Clutches and Flywheels: all compatible, something about 88 and 89 clutches and sharing different number of splines based on the transmission input shaft... i don't know much about this.

Distributor: D15Z1 and D16Z6 are the same. D15B7/B8 are the same. D16A6 has different plug than 88-91 d15 (Crank angle sensor for MPFI)

Intake manifold brace is different between 1.5 and 1.6 due to deck height. A spacer fixes this problem.

valve cover info:

88-95 d15bx d16a6 same
z6 ?? unknown
y5/y8 ?? unknown
z1 and y7 valve covers do not interchange unless you clearance the z1 cover to clear y7 rocker arms! read a post about it below

Generation

88-91 vs. 92-95

Differences: Water neck out of head is different angle, 5th gen thermostat has sensor in it. Water tube out of water pump is different.




sorry it has shitty 96+ info, the only experience with them i have is my y7 in my car

Tom-Guy

So am I. My web gallery is hosted on RPR, btw.


I don't know what that is supposed to mean.

All the D16 internals will tuck neatly into a D16A1 swap, but the CG transmission you find with those swaps need going through. Cheap CRXs, cheap swaps, but some of the money you save goes to freshening up the transmission.