216Resident

Hello all, first time posting but long time reader of all the different Honda forums. I'm looking for suggestions on what I'd need to do to get between 150-200hp in an all motor y8. Going to be daily driven but not very far. Taking any and all suggestions into consideration. Thank you for your time

ontariorider

150-200whp out of a single cam is no joke. Are you trying to stay within a class rule or any reason why you don't want to go b series? It will probably be cheaper and faster to just do a gsr swap...

BattleGround

You should be able to do it. You'll need to at minimum clean up the ports on the head. You'll need a very aggressive cam. and you'll need around 12:1 compression and make peak power around 7500rpm. The engine won't last as long revving that high but they can make a lot more than stock if they are tuned to the extreme RPM limits. It will cost less and get way better mpg to put on a basic small turbo but sometimes NA is life haha

pogeeboy27

iTrader: (3)

Sounds like way too much effort for a small return. Go B series.

216Resident

To everybody suggesting go the B series route, I've already thought about that but I'm wanting to do something different. There's not very many fast single cams around me. I'm not on a budget at this point in time so price isn't something I'm too worried about. 150-200 was just a rough goal.

chad

150 hp in a d series just to be different is just stOOpid....

solorex

Long time reader and your first post is kinda in the wrong forum. There is a recipe to get around the 160hp mark with a D-series. Lots of people have done it, but like above you need good port work, an aggressive cam and at a minimum P29 pistons to bump up the compression you need 12:1 or greater. If you are indeed a longtime reader of forums surely you know about: D-series.org

Start reading. Tons of threads there.

pogeeboy27

iTrader: (3)

OP see Bisimoto Engineering.

bigG

iTrader: (6)

76mm bore with d17 crank w high comp pistons obx itbs custom camshaft professionally ported head and custom header

dirty19

iTrader: (1)

Why ? Seems like a unreasonable unreliable source.
Try a B series or a poor mans R engine build

jdblock

It's already been done. It won't be different.

DaIll1

put a Hayabusa in it

davegt27

I am also curious about the original posters question
class rules prevent me from doing a lot of stuff but this CRX race car I have has an integra ECU

Pro-SeriesFab

The only real consideration I have for the d-series is if you can do a lot of the work for yourself . . . if you don't have an air compressor/porting tools, space to work on it, engine building tools (mics/torque wrench/bore gauge,etc) then you'll spend the same money in a motor but end up with a lot less HP than you could with almost any other series of Honda engine. The only real saving grace of the d series (and I have a place in my heart for them) is you don't have to spend money on swap kits/ECUs since most of the cars we start with come with them stock.

If you can do a lot yourself, you can make 150whp+ for not much since you can buy a z6/y8 for ~$300 or an "undesirable" d series (d15b2, d15b7, d16y7) for next to nothing and use parts from it with a better head and intake. The last two d series engines I bought, (stock d15b1, d15b6 with a rod knock) I paid $50 for both of them.

Port the head/get a valve job, keep the y8 intake and cut open the plenum/port/weld it back up, get a cam from BC/Rocket/Bisi/Whoever and shoot for peak HP out past 8000, run as much compression as your fuel/tuning will allow.

davegt27

I did find this link would these CAMs work?

Fast Road, Rally, Race & Turbo Camshafts for Honda D16A9 Engines.

almost all the D series CAMs are regrinds as far as I can tell
my last motor I built



I think part of the problem is the first thing people do with Honda motors is do a engine swap, so no one makes parts for the original motor and a lot of the old school guys that had
the knowledge have moved on.
when I do a search I get dates of 2007 or older
https://en.wikipedia.org/wiki/Honda_D_engine

Pro-SeriesFab

The cheap ones are anyways . . .

The next step up are those chinese cores you buy from newland or someone like that.

The "billet" cores that are being offered for the d series, I have no idea who is making them. All the guys I see offering cams for them never post pictures of their Bercos or Landis 3Ls or Okumas which tells me they are being made by someone else.

I bought a piece of 4340 and made my own since no one makes anything for the y7 head anyways.

davegt27

I asked my machine shop instructor if camshafts could be cut on an CNC machine he said no it take some million dollar special cam cutting grinder/machine

are you saying you have a cam grinding machine?

Pro-SeriesFab

I made my own blank, basically a camshaft that is complete except the lobes are completely round. If you installed it, it would hold the valves open the entire time.

I sent the cam to a cam grinder in NC (I would name him but it didn't end well other than me finally getting the camshaft after several months) to cut the lobes, finish grinding to size the journals, and then nitriding the cam.

Bercos are like ~$50k new, I'm sure much less used. The design is basically from the 1930s and was used up until CNCs became popular by the major cam grinders in the 70s. They still work very well, they are just a lot slower as the Landis/Okuma stuff. I could see the new Okumas being over $100k but I've never talked to a rep about one.

Aquafina

iTrader: (3)

150 is easy on a budget (an actual budget, not ebay knockoff bolt ons and expecting to hit 200whp kind of budget). 200 will require a serious budget and more easily obtainable with a Z6 head.

davegt27

info is hard to find seems Honda people the first thing they do is swap the whole motor

I did find info on a mini me swap which is a ZC motor I think

to get even close to 200 HP I would need over bore 0.40 ??
bigger valves ??
custom pistons ??
custom rods ??
fully ported head ??
I have plenty of sidedraft carbs but haven't seen any sidedraft manifolds for the D16A6

vtecmaster85

dang havent seen Aquafina post in a long time! but yea ive seen a d15b hit like 150 with some headwork and more compression and i believe either the stock cam or a regrind.

Aquafina

iTrader: (3)

I stick to the trans forum for the most part.

Last D I built did 155whp/133wtq. Pretty mild setup. Regrind cams, valve job and bowl port, 13.5:1, Edelbrock IM, custom SMSP header.

siregcivic

hello, i am a tuner and i just tuned a sohc that put out numbers that impressed me... he had d15b vtec 12:1 forged pistons ported head and cam.. cam wasnt to wild it idles like stock.. skuk2 manifold and tb and ebay header car made 179 hp 140tq i know this is unbelieveable, tuned on a dynojet... but i also tuned a gsr integra with a dc header and exhaust the very next day and got 179 132 tq so i know the dyno doesnt read high..

here is a pic of the graphs red line is sohc blue line is gsr

JRCivic1

So, you tuned a basically stock GSR engine with an average header and some type of cat-back system and made 179 wheel HP ???

Chance EG

My thought too lol. "doesn't read high" my ***