Need your opinions

[allan442]

Hi members! I'm thinking of having my D15b engine "port and shave" and later on i'll have a racing camgear? is it a nice thing to do? Thank you

[ghosthunter]

Hi members! I'm thinking of having my D15b engine "port and shave" and later on i'll have a racing camgear? is it a nice thing to do? Thank you

No such thing as "nice thing do to" when you are modding for performance.

Best to have your modification path planned out in advance so your mods now will not be wasted by mods in the future.

[dr. d]

well, nothing is free. if you want performance, you can have it in exchange for engine longevity.

[niky]

Hi members! I'm thinking of having my D15b engine "port and shave" and later on i'll have a racing camgear? is it a nice thing to do? Thank you

Are you willing to spend enough money to swap a B16A into your car to achieve the performance you want? If not, don't bother. It's much easier to swap in a Japanese D15B VTEC for extra power than to build up a local D15B.

A "port and polish" is one of the last items on the budget, and has the least effect on power... at least until you've fully built the engine. Best to have it done at a place that can flowbench the head and decide how much more flow you need.

A fully built local D15B (non-VTEC) will make quite a bit of top-end power, but it still won't be anywhere near as powerful as a B16A or a 2 liter engine with simple mods.

[allan442]

Hi Niky! Mine is already D15b VTEC japan. thanks for your input.

[niky]

Ah. Then if you're committed, go ahead. Just remember, once you've done all the simple things, every hp after will cost you much more.

Cams, camgears and P06 first. Then port and polish if you're not satisfied. The PnP has to be matched to whatever cams you get and your overall power gains and targets.

[isa1023]

Hi members! I'm thinking of having my D15b engine "port and shave" and later on i'll have a racing camgear? is it a nice thing to do? Thank you

Do the IHE, racing camshafts and adjustable camgears before PnP. Then re-chip or piggyback the P08 ECU.

:devil:

Despite the SOHC layout, that is one rev-happy engine you can redline to almost 8000 on slight proper mods.

Then, if you want more evil, add high compression pistons and raise the compression.
:evil:

[allan442]

Guys thanks for your inputs. however i just want to know if after getting all these performance enhancements would it change my fuel consumption and if "yes" do you have any idea what's it gonna be?

[niky]

Guys thanks for your inputs. however i just want to know if after getting all these performance enhancements would it change my fuel consumption and if "yes" do you have any idea what's it gonna be?

If you have to ask about fuel consumption, you don't want racing cams. Seriously. Expect a drop of around 1-2 km/l in city driving... much more if you go hog wild with cylinder head mods and over-port it.

[mda_]

usually, more hp = lesser fuel economy

[rex31angel]

usually, more hp = lesser fuel economy

+1 dito..

[isa1023]

usually, more hp = lesser fuel economy

+1 dito..

Not always necassarily true...

Fuel economy will still depend of the degree of modification and intervention done on the ECU's fuel mapping to maximise power and torque from intake, engine internal and exhaust mods.

[allan442]

So adjustable racing camgears will right away cut 1-2 km on my FC still without PnP? And i have another question when I had my D15b Vtec engine installed I did not change my box so I guess i still have the stock one. Should I change my box to something else for more power?

[LeapFrog]

* TS - look for Honda/Acura Performance by Mike Ancas. Baka makatulong ito sa mods mo. HTH.

[Type 100]

So adjustable racing camgears will right away cut 1-2 km on my FC still without PnP? And i have another question when I had my D15b Vtec engine installed I did not change my box so I guess i still have the stock one. Should I change my box to something else for more power?

Yes.

Or invest in a piggyback ECU/fuel controller that will let you retain the stock ECU...but you could probably swap the whole thing out altogether, since this is a D15B we're talking about - a pretty old engine by now and a known quantity in tuning circles.

Modding the car while retaining the stock box is like giving your kid a pair of nunchucks. By themselves the nunchucks are potentially deadly, but without any knowledge of using them the poor kid won't fare too well.

[isa1023]

Should I change my box to something else for more power?

Yes.

Your D15B has VTEC and its camshaft has 20 lobes unlike you're old ph16.

Another option would be piggybacking it with a VTEC-fuel controller.

Or standalone ECU management (which will be more expensive than buying a P08).

Then re-tune after installing your modifications.

[allan442]

Yes.

Your D15B has VTEC and its camshaft has 20 lobes unlike you're old ph16.

Another option would be piggybacking it with a VTEC-fuel controller.

Or standalone ECU management (which will be more expensive than buying a P08).

Then re-tune after installing your modifications.

What do you mean piggyback with VTEC-fuel controller? Where can i buy stuff like this and how much would it cost me?

[ghosthunter]

What do you mean piggyback with VTEC-fuel controller? Where can i buy stuff like this and how much would it cost me?

It is a device that plugs in between the engine & ECU. It modifies the signals going to the ECU so you can get the engine to perform the way you want it.

You can buy them from car tuner shops.

BUT these devices are not plug-in and go. They will need to be "tuned" properly.

If not tuned properly, you can lose power & fuel efficiency more easily than gaining power.

You will need to have your car tuned on a DYNO. There are only a few shops in metro manila with a DYNO.

A dyno is a big machine that measures your engine's output (in wheel horsepower) through the car's wheels.