any Mini-Mi swaps here WITHOUT a turbo?
02-20-2003, 12:31 AM
#1
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any Mini-Mi swaps here WITHOUT a turbo?
hey guys I posted earlier if anyone had done a D15B7 to D16Z6 swap... since maybe that was too specific, I am reaching out to all those who have done any mini-me swap in general (without custom turbo). I was wondering if this swap is worth my time and money. Forget HP numbers; what kind of power difference have any of you felt since swapping your head to VTEC? Does this little VTEC give a healthy push in the high-RPM's, or is it just noticable to you because you know your car so well? Also, for those who have dyno'd, I would expect power increase at any engine speed, because of the compresion ratio in addition to VTEC. Any thoughts?
02-20-2003, 12:39 AM
#2
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Posts: 13,991
Re:any Mini-Mi swaps here WITHOUT a turbo?
I have a thought.. I think you are putting to much thought into this little swap.. Its about a 20-25hp gain or so. Its not like "holy ---- this thing is fast!" its like "ya its a little bit quicker"
just go out and buy a z6 head and put that mother ****** on.
Sometimes I think all of you guys try to think things out way to much.
go with Nike's slogan...
"Just Do It"
lol,
Jeff
just go out and buy a z6 head and put that mother ****** on.
Sometimes I think all of you guys try to think things out way to much.
go with Nike's slogan...
"Just Do It"
lol,
Jeff
02-20-2003, 02:19 AM
#3
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Join Date: Dec 2002
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Re:any Mini-Mi swaps here WITHOUT a turbo?
abaz is right its a nice little hey im fast than i was. if you do the right stuff to it you can go far. i ran a 14 flat with my z6 this past summer . on steet tires with slicks a bit more strip experience i bet i oculd of hit 13's.
but one thing most people odnt know is you get what you pay for. your not gonna get 200 hp for a couple hundre bucks in a new head.
scarponze
but one thing most people odnt know is you get what you pay for. your not gonna get 200 hp for a couple hundre bucks in a new head.
scarponze
02-20-2003, 04:18 PM
#4
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Re:any Mini-Mi swaps here WITHOUT a turbo?
Actually, I've done the minis. Sorry I didn't post earlier, but I don't really watch the Hybrid forum, just FI. 
As Jeff said, it is a small swpa. Nothing to go bragging about, but it gives you a little advantage over the little 4g Si's.
You'll pull strong through 1st and 2nd, an you'll also notice 3rd pulls a little stronger. Other than that, 4th and 5th are just as weak as they were before.
Now, if you're planning on doing a mini, don't use the Z6. The Y8 will cause you less problems with your distributor in the long run. Since it bolts right up. The problem with the Z6 is that the "ears" that you bolt the distributor down with don't line up, so you have to hack two of them off just so you can get your ignition timing set correct. This makes a sloppy/ghettofied looking engine bay. Plus if you plan on doing something different down the road, you can't because you distirbutor is all hacked up.
Speaking of timing, use whatever timing belt of whatever head you're using. That's a must. The stoch A6 won't fit either of those heads.
Oh ya.. don't forget to pop your oil jet on your A6 block. Too much oil pressure in the head if you don't.
Hrm, what else.. oh ya, don't use an RPM switch for VTec. Get a good controller if you plan on keeping that head swap. Maybe start with the RPM switch, if you like it, get a controller. They're a lot easier to tune..
As Jeff said, it is a small swpa. Nothing to go bragging about, but it gives you a little advantage over the little 4g Si's.
You'll pull strong through 1st and 2nd, an you'll also notice 3rd pulls a little stronger. Other than that, 4th and 5th are just as weak as they were before.
Now, if you're planning on doing a mini, don't use the Z6. The Y8 will cause you less problems with your distributor in the long run. Since it bolts right up. The problem with the Z6 is that the "ears" that you bolt the distributor down with don't line up, so you have to hack two of them off just so you can get your ignition timing set correct. This makes a sloppy/ghettofied looking engine bay. Plus if you plan on doing something different down the road, you can't because you distirbutor is all hacked up.
Speaking of timing, use whatever timing belt of whatever head you're using. That's a must. The stoch A6 won't fit either of those heads.
Oh ya.. don't forget to pop your oil jet on your A6 block. Too much oil pressure in the head if you don't.
Hrm, what else.. oh ya, don't use an RPM switch for VTec. Get a good controller if you plan on keeping that head swap. Maybe start with the RPM switch, if you like it, get a controller. They're a lot easier to tune..
02-20-2003, 08:09 PM
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Re:any Mini-Mi swaps here WITHOUT a turbo?
02-20-2003, 09:54 PM
#8
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Re:any Mini-Mi swaps here WITHOUT a turbo?
hey guys thanx for the quick replies. By the way, TurboEF9, I think a Z6 would be a better bet for me since I am using a '94 Civic, OBD1, so the ECU mod from a Z6 would not require an expensive conversion -- the P28 fits right on. When you talk about a hacked distributor, are you referring just to my stock one? I know about that one, but I wouldn't have to hack up a Z6 distributor would I?
Also, I don't expect huge gains for a couple hundred bucks, but if the power difference will be about as minimal as what guys say a free-flowing exhaust and intake does, I don't know if it's worth the risk. I don't know what VTEC feels like, so I don't really have an idea of what to expect. I know little about these engines, and I am learning, but I would hate to get in over my head for some barely noticable difference. You guys describe exactly what I am looking for... a little more push in 1st and 2nd, and maybe 3rd. Something so I can have more of an edge over a V6 Camry, because right now they own me.
Sorry for thinking so much, Jeff, better to plan too much than too little.
Also, I don't expect huge gains for a couple hundred bucks, but if the power difference will be about as minimal as what guys say a free-flowing exhaust and intake does, I don't know if it's worth the risk. I don't know what VTEC feels like, so I don't really have an idea of what to expect. I know little about these engines, and I am learning, but I would hate to get in over my head for some barely noticable difference. You guys describe exactly what I am looking for... a little more push in 1st and 2nd, and maybe 3rd. Something so I can have more of an edge over a V6 Camry, because right now they own me.
Sorry for thinking so much, Jeff, better to plan too much than too little.
02-20-2003, 10:21 PM
#9
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Re:any Mini-Mi swaps here WITHOUT a turbo?
Oh, I missed that you saud B7 and not B2.. Ya, depending on how your car is setup you may need a different distributor.
I haven't seen a DX EG.. It has multipoint fuel injection? If so, you have a distributor with a CYP sensor and you won't have to worry about swapping distributors. It should bolt right ot your Z6 head. Now, the thing is, though, I don't know if the B7 will raise the compression like a A6/Z6 block/head.
Now, I know in the EFs the B2/Z6 or B2/Y8 the compression is actually supposed to be HIGHER than the A6/Z6. I don't know. I haven't actually tried all of that..
As for VTec, with a P28.. you're talking a little bit more thank a few hundred dollars. P28's are going for $200+ on eBay, and Z6 heads? Couple hundred as well.
I haven't seen a DX EG.. It has multipoint fuel injection? If so, you have a distributor with a CYP sensor and you won't have to worry about swapping distributors. It should bolt right ot your Z6 head. Now, the thing is, though, I don't know if the B7 will raise the compression like a A6/Z6 block/head.
Now, I know in the EFs the B2/Z6 or B2/Y8 the compression is actually supposed to be HIGHER than the A6/Z6. I don't know. I haven't actually tried all of that..
As for VTec, with a P28.. you're talking a little bit more thank a few hundred dollars. P28's are going for $200+ on eBay, and Z6 heads? Couple hundred as well.
02-20-2003, 11:05 PM
#10
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Re:any Mini-Mi swaps here WITHOUT a turbo?
hey no worries on the issues of compression and distributor, Jeff has already talked me through all of that. I just wonered if you had some new information for me. Just for the record, ECU's are going for like $140 on Ebay (not new), and I probably will use my stock distributor. I have made an Excel sheet of all expenses I will incur with this, right down to the last head bolt, gasket, and timing belt. I have got it down to $403 right now, without buying a Z6 intake or T-body. I refer you now to my earlier threads in this forum, all within the last 2 weeks. Enjoy
