d15b4 dual carb

**m2h** · 04-09-2003 03:44 PM

any simple mod or bolt on parts can get more horse form it?

**Rowie** · 04-09-2003 03:58 PM

extractors, exhaust , get the carby's jetted , or go EFI

**m2h** · 04-09-2003 05:30 PM

hum........... extractors, any special kind of extractors i should looking at?
is there anything i should be looking for when i am buying it?

**Setanta** · 05-09-2003 07:34 AM

Intake/Header/Exhaust

Go to a 2 inch system for that motor and high-flow cat and muffler (don't go cannon sytle etc - it's not worth it with that engine. Header is a hassle - hurricane (I think) made one but it's not much chop - a custom setup may be better, but will be more costly. Intake - a pod is actually a better way to go than insert as the D15 is open to the engine bay and heat-soaks badly - set the pod under your front bumper as a CAI to see some improvement - you'll need to use custom ducting.

The carbs can be re-jetted - Peter at Hanny's in Smithfield has the info on this.

Change the cam, HCCNSW might have the mugen grind specs so you could get a regrind or billet. Alternatively I think Crow(???) did a grind - but the US will definitely have one given the 4th gen enthusiasts there and a their original lack of the DOHC ZC. Try www.automotiveforums.com and go to the Honda -> 4th generation Civic forums and ask, there's enough people using the D15/D16 there. Bump the compression by shaving the head.

Finally, there were twin 40mm webber carb manifolds built for the D series SOHC in the '90s - If you can track one down it will make a nice difference. Again, the US is your best bet.

Finally - forget all of the above and get a ZC in there or a SOHC VTEC

Cheers

**m2h** · 05-09-2003 10:45 AM

yeh, after hearing all other ppl saying stop wasting time on this engine and do a swap. So, now i hear new things, Sohc vtec....
what engine code is that? is the sohc vtec engine same as ZC that can bolt on without modification?

Thanks for answering all my questions

**wynode** · 05-09-2003 10:49 AM

If its an EG, I say put in a b16. It have about 20kW more thand teh d16a8.

**Setanta** · 05-09-2003 03:56 PM

I'm pretty sure that the d15 twin-carb was ED(EF) only, so he's talking a 4th gen. The EG breeze got the 1.3 or 1.5(?) single-carb.

**CAT_SPEW** · 20-09-2003 06:56 PM

I got the same car as you, and I am thinking about converting the engine in the near future.
What would you guys recommmend? I want it to have a bit more power than it does now but I'm not too familiar with which engine to put in?
B18C? B16A? I think the b18c is the VTI-R engine from an integra??? Are they ahrd to come by? Expensive?

I would most probably be doing the mechanical work at home as my dad is a mechanic, but does anyone know a rough price figure I would be looking at for everything I would need?
Thnx.

**vti-2** · 20-09-2003 06:59 PM

The B18C is from the DC2, it isn't as cheap or easy to come by as the B16A.

**CAT_SPEW** · 20-09-2003 07:39 PM

i'm guessing the b16a is sohc vtec? So how much more power would I be looking at? Around 20KW?
Would it make much difference?

**vti-2** · 20-09-2003 08:19 PM

Here is a link with engine specs for all the Civic models...

http://www.ozhonda.com/forums/viewtopic.php?t=4

The B16A is a DOHC VTEC and should give a good 22kW increase over the 1.6L DOHC non-VTEC. That is in standard form. Once you start doing mods you will start getting much larger increases in HP.

Yes it is a big difference and yes it is worth it. :mrgreen: