HairyHarry

So I recently got an automatic 1993 Honda Del Sol Si as a parts source for my automatic 1993 Honda Del Sol S. I was wondering if it's possible to do and if it is, would it be worth the time for an extra 20+ horsepower? The parts car is fully drive-able with no CEL or any noticeable problems.

NotARaCist

iTrader: (1)

Yes, it is possible. You'll need to swap over the entire longblock, transmission, engine wiring harness, and ECU. As for "worth it", that's entirely subjective, and up to you. Just realize that you're talking about 23 "brand new to the crank" HP, whereas neither motor is brand new, and the power you actually feel is to the wheels, so in all reality, you're only looking at a 5, maybe 7 WHP gain, if that.

HairyHarry

I read in the FAQs about a 'mini-me' swap of the two engines I have. Would that be more costly/complicated than just swapping everything? And I should be able to throw the D15 into the parts car right?

NotARaCist

iTrader: (1)

Since you're working with autotragic transmissions, a mini-me would not be viable. You need to stick with an OEM ECU, and there is no OEM ECU for a "mini-me", because it isn't an OEM combination. Basically, unless you want to 5MT convert, just forget about a mini-me.

Yes, you can swap the motors between the cars (along with all of the other stuff I mentioned) and be good to go.

HairyHarry

Alright thanks for the info. If it were up to me, I would be driving manual by now but I'm stuck dealing with autos for stupid-ish reasons lol. Do you know where I can find a DIY of how to remove the engine harness or can you give me a basic 'how to' like "Step 1: remove the dash..."?

NotARaCist

iTrader: (1)

You don't even need to pull the dash. Just unplug it and pull it out. Be gentle, and keep an eye out for those silly little zip tie looking clips, but it's extremely easy to just pull out.

HairyHarry

Okay cool. I also just realized there is cruise control in the Si. Will putting in the D15 affect it or not?

NotARaCist

iTrader: (1)

I could be wrong, but I believe the cruise control has it's own control module outside of the ECU - you should be fine. Just make sure you have a place to hook up the vacuum line, and if you don't, make one with a T.

94EG8

You don't need to swap the trans on OBD1 vehicles. It will be faster if you keep the stock D15B7 trans due to the lower overdrive gear.

Cruise control has it's own separate module under the dash on the driver's side.

The easiest way to do this seeing as how you have both cars is to just swap the underdash harness, the short harness that runs from just inside the driver's side of the firewall to the driver's side headlight and the engine harness, along with the engine. Don't forget you'll also want to swap the gas pedal and the brake light switch. None of it's hard, just a little time consuming.

HairyHarry

Doing this wouldn't decrease the life of the transmission?

HairyHarry

I didn't want to start a new thread as this is sort of related to this one so...

There seems to be a fluid that is pooling up on the intake manifold and I don't know what it is. Is it fuel or oil? And what would be the cause/solution to it?

And once again, this place won't let me upload any photos. So I'll try to describe the color of the fluid. It isn't black, but a transparent dark reddish-brown and the areas where the fluid dried, there is a gold/yellow stain. There isn't much, maybe a few drops' worth in a pool, but there are three pools (one in between each tube leading to the engine).

NotARaCist

iTrader: (1)

That could be oil leaking from your valve cover gasket, or it could be gas leaking from an injector seal. Either way, both are cheap to replace. Don't worry about uploading pictures here - upload them to an image hosting site, like Imgur: The most awesome images on the Internet, and then post the BBCode link here.

HairyHarry

NotARaCist

iTrader: (1)

Still could be either (when I had pooling there, it was fuel) but the discoloration on top of your intake manifold flange means it might still be your valve cover gasket. Replace the valve cover gasket, clean that **** up with a rag and some degreaser, and see if it comes back.

tony_2018

Guessing games....

Clean it up and locate the leak.

94EG8

No.

HairyHarry

Alright so before I seal the deal to swap engines, what are some ways to inspect my D16Z6 to make sure it's in good, worthwhile condition? Like visually and while I'm driving?

I did drive the car for a good 2 hours straight in D4 getting it back to my house and it didn't seem like anything was wrong, but I just want to make sure because my D15 is in pretty good condition and I don't want to swap a good engine with a bad one.

jonsey1886

Compression test
Leakdown Test

eghatch9295

iTrader: (1)

waste of time. WASTE OF TIME. waste of time. WASTE OF TIME! why bother with this swap? there are so many better things you could be doing for the time/effort, like a manual conversion. (insert pussified excuse as to why you can't), replacing dirty old suspension parts and bushings, brake and suspension upgrades...etc. swapping from a **** guzzling b7 to an anemic z6 strapped to a slushbox for 10 or so whp is a WASTE OF TIME!

HairyHarry

Yeah it could be a waste of time, but I have no job or anything else to do really. Which also leads to me not having money to do those other mods/upgrades (yet). Doing this swap will at least give me more experience working with the engine and also give me increased power (which I've actually noticed the D16 having compared to my D15).

However, I still haven't made up my mind about doing it yet.

eghatch9295

iTrader: (1)

sell the z6. they go for 4-500, probably 500 as it is tax time