Civic EG

Hey guys been awhile. Here is my question, I have a D15B engine in my 92 Si hatch and I have decided after careful thinking that I would like to build my car NA. HP number is a wishful 250 to the wheels. (and i realize this may have been asked before but I am super lazy when it comes to forums and searching) So you can either answer or dont I understand either way. Anywho, Which engine is better to build NA, a D16Z6 or my D15B? Thanx for the advice in advance

You will never make 250whp NA with a D series. Sorry bud.

Unless you are Bisimoto, I doubt you will ever see those numbers.

poorman type-r wrote:You will never make 250whp NA with a D series. Sorry bud.

Unless you are Bisimoto, I doubt you will ever see those numbers.

Never say never!!!!

broken wrote:Hey guys been awhile. Here is my question, I have a D15B engine in my 92 Si hatch and I have decided after careful thinking that I would like to build my car NA. HP number is a wishful 250 to the wheels. (and i realize this may have been asked before but I am super lazy when it comes to forums and searching) So you can either answer or dont I understand either way. Anywho, Which engine is better to build NA, a D16Z6 or my D15B? Thanx for the advice in advance

For your NA route since parts for a JDM D15B are not too easy to find. id say go D16z6. Keep in mind it's a SOHC, not saying that it's not possible, because everything is possible it just depends how deep your pockets are but it will definately be alot more expensive then going the turbo route..

For a SOHC NA is never Ideal but it can be done!! you just have to have the resources to do and BIG pockets!!!!

Well he said in my Si hatch so I am guessing it's his DD. If you even come close to those numbers it will not be street driven. You would have to run C16 fuel which is pretty pricey lol.

poorman type-r wrote:Well he said in my Si hatch so I am guessing it's his DD. If you even come close to those numbers it will not be street driven. You would have to run C16 fuel which is pretty pricey lol.

oK so it's do-able. never say never.. lol

For the cost of that build u could buy a nice k and tweak it a little

i dont even know if 200 na hp would be worth the money you would have to spend. yeah it would be awesome but it would cost... alot

Sad but true it's hard to get those kind of numbers on a sohc motor but if your mind is set on it go for it it's cool seeing people still rocking the single cam

Thx for the input guys. I knew I would get some good answers. The car is my DD, but I have a turbo Daytona as well that is my play car. The NA build is gonna be done so I guess I will get a D16Z6 and build it. If 250 sounds to high or unreachable then I am gonna go to whatever I can hopefully close to 200. Adding 100 horse to a motor NA should not be that impossible but expensive may be the case. You guys are awsome and I will have to update when I begin the build. Motor will be getting built out of the car and installed when completed. Which should make the DD side of things not even be a problem. I have a nice shop in my backyard to build the motor in. Any suggestions on internals manufacturer wise? IE: pistons, rotating assembly? Oh and Singles are the shit always will be IMO

broken wrote:Oh and Singles are the shit always will be IMO

if your looking for an inexpensive build(Compared to N/A power) to get 200-250whp then I would recommend a small turbo such as a td04 off a WRX or a t25. They would spool instantly almost off of idle so you wont have turbo lag.

For the engine I would recommend Forged Rods, OEM Rod Bearings, Vitara Pistons, ARP Rod Bolts, ARP Headbolts, and a new headgasket. Going with a Stage 1 or 2 Cam wouldn't be a bad idea either. If you do this your engine will be reliable at the hp levels you are seeking.

I would recommend a Good Quality turbo manifold and a good quality turbo, You can get td04 WRX turbos and t25 turbos from junkyards. The Blow off valve you, and oil plate you get should also be quality parts.

Most of the rest of your parts can be found off ebay, Intercooler, piping, couplers, gauges, etc.

The above setup would make for a Good Daily Driver that can get 30+mpg if you want to and run 92octane pump gas and should be able to get the power you want. It will be alot cheaper then building a 200whp D15b.

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Another option is all you want is some fun part of the time. Is nitrous. If tuned correctly a wet 75shot kit is safe on a D Series. I would recommend stronger rods if your going for a 100shot wet kit. The benefit is its cheap to install, and you only make the power you want when you want your power so it always feels fast and you wont wear your engine out as quickly.

Its not as good of an option if your doing road coarse events. If your doing drag racing/freeway pulls its a good option though.

Well the nitrous is not even an option. I plan to street drive the car and drag strips are not in my plans. Been there done that. Got bored. No offense please. As for the turbo I realize from past projects that a turbo setup can be the cheap route compared to NA but, there is just something that has been itching me about NA. And though the D15 in my car is not the original engine picking up a D16Z6 to build and drop back in is the route I plan to take. I like the SOHC motors and I really wanna see what they can do.
I love keeping cars close to stock in looks and engines. Plus I think NA power on a road coarse would be alot of fun I appreciate the info on manufacturers though I figured Vitara would be one of the piston names. Had them in my old Prelude (that was a turbo build) And ARP was a lready a given and I had bought a set for my old engine that had the bad crank. I believe in ARP bolts in even stock motors cause why the hell not. Same with cometic HG's

If your pockets are deep and you want the best rods available, I would get Carrillo Rods. I heard they were the strongest most durable on the market. Supertech Valvetrain would be nice and maybe the Level X cam from Bisimoto. You could even stroke the z6 and make the displacement higher. Maybe even TWM ITB's

yes.. stroke the motor it will help the torque and power of the motor

you can get a d17 block outta a 01-05 civic (non si)
and stoke the z6 with the d17 crank,rods and piston

so if you do stroke you need to buy rods for that motor(d17) or same length

bisimoto has prob the best parts
get his header, cam, cam gear, valvetrain. PnP the head.. eagle intake manifold (itb's are for looks.. they add very lil hp more torque tho)
exhaust. icebox intake.. the hondata s300.. you can hit close to 200