I recently aquired a free dx motor from a 93 civic. It cam with an auto tranny, but it was all free. I want to build it up on a budget. It has to be reliable as a daily driver. I would like advice on pistons to raise the compession ratio. If anyone could suggest good, cheap pistons and an idea of their compession ratio in a d15b7. Also, what else can I do (all motor) to make this motor a little more powerful? Thanks.
After reading a couple comments, this is not a race motor! I'm doing this to basically learn how to work on a motor. If I build it, and it's slower than the 70 hp I have in my car now, then I've learned something. To the people who wish to contribute, I also need suggestions on an ecu. Thanks.


[Modified by civicmatt, 7:17 AM 10/27/2002]

 

dude.... why?? its not VTEC let alone even a single camer. yeah you got a deal with it for free, but you really cant build up a Dx into a heavy duty machine.

 

variable valve timing is so overrated.....i think theres a site that specializes in mini-me build ups and so forth......it's a D series website like this....hmmm....whats the name.....anyone?

 

I have the same motor...strong motor
I'm lookin to maybe do the turbo buildup they have in the FI forum
400 bucks plus S&H from thailand...I cant remember crap about it right now
the d16 and d15 both have 75mm pistons n stuff trying to figure a few more things out
I figure its good for around 200-250hp then BOOM it'll blow

ditch the auto tranny too..won't do anygood

 

yeh the d15b7, is kinda underrated, for someone that has a hatch or something light that they can throw it into, its a great project motor to build and learn on, I hate vtec, all my motors that Ive built/used are non vtec, Vtec can sometimes get int the way of things. Jason Whitfeild had that green crx with a 1.5 in it, the thing ran 10's, nuff said. But as far as all motor, carbuerate it, run like 12:1 compression pistons, build the head with titanium retianers, springs, , and some good ol ferra vales, as far as a cam, get a cutom one made or I think the bullfrog cam is a good one.

 

utter bullshit. u gave no reasoning to back up your points.

 

hahahahaha
overrated.
thats why you see 14 second DX hatchbacks ALL THE TIME right?

Look, the d15 isnt a bad motor. but if your gonna pump ALOT of money into it (like pistons, rods, headwork etc) the money you spend on it could be put down for a GSR swap and you would get the same performance and have a MUCH BETTER base for future modifications.

 

yea but i could say "why build a 4 banger..u could get a v8 and be x much faster for x less money blah blah", its all preference, its not about "smokin dem foos yo..build a 2.6 liter ( which im sure would rip)" for everyone, some set ups are gonna appeal to different use. a lot of people dog on motors they have never worked with.

 

Well stated my colored chum, your stock is rising my friend.

 

I posted alot on this subject a few weeks ago...

https://honda-tech.com/zerothread?id=307918

liam

 

2 simple FACTS.........

D15B7 went 15.08 with simple bolt ons and TUNING, made 118 whp
D16Z6 went 15.02 with same bolt ons 3 weeks later.

Yes, I use slicks. That way I'm consistant and can measure small differences in mods.

 

I can believe this. The major differences are the z6 is much stronger then the b7. But for an all motor application either should work fine.

liam

 

if an EX auto would be better than a DX for acceleration i have one for sale!

 

Mista Bone hit the nail on the head, although I won't be drag racing. 118whp is very close to what I'm looking for. I want more pep than my d15b8 and I need reliability. This is for a daily driver/weekend autocrosser. Thank you.

 

I'm ooking for some good Honda pistons to put in the motor to raise the compression ratio. Pistons from other hondas tend to be cheap, and they'll do the job. Can anyone recommend pistons?

 

Hybrid Motorsports had the cheapest SRP pistons when i called around. I was building a D16z6 and needed to lower the compression and implant a stronger piston. Eagle rods have been the cheapest i have found, I think NOPI has those. Make sure you upgraded to a thicker metal head gasket. After these items unless you are just running ungodly boost you just need to concetrate on fuel. Which in my opinion is sometimes more important that the hardware.
FUEL FUEL FUEL is so important.

 

Thank you, but what the hell are you talking about? I'm asking about an all motor setup! I just want to get from A to B quicker that my cx motor! NA! Thanks anyway.

 

he didnt ask if he should get a GSR swap or ITR/H22A4 swap, he asked if we could help him play with this dinky D15, and all i did was suggest a headswap.....chill

 

88-91 crx cam work fine with d15's...

 

That is exactly what i plan to do. I've heard good things about the old si cam. what about some kind of oe pistons from another d-series? How else could I raise my compression ratio.

 

dont use zc pistons in a d15b7...they dont fit with the stock rods

liam

 

Thanks.

 

please explain.

 

ezboard.com, D-series forum. All the info you need on single cam.

 

uh, you might wanna look at WHO is listed on that page as main brains.

I'm there, but always willing to learn MORE, and WHY.


[Modified by Mista Bone, 10:23 AM 10/29/2002]