[Fabio213]

Ok so I've done a lot of research on staying N/A with my d15b7. So what I had planned was a 272 delta cam,head milled to 0.070,and I already have all the other bolt ons that everyone has. So then I heard that gas mileage will suffer because of the high compression and the cam so I didn't like that anymore because I need to stay gas reliable cuz I drive 350 miles a week but I still want a fast little honda. So here is where my thoughts of jumping on the vtech wagon began so if I do z6 head how much can I mill it before having to buy a cam? Or if I stay with the d15b7 all motor what can I do for me to still get good gas mileage?


My setup now is a6 cam,headers,exhaust,intake.

 

[baajaa]

If you tune it I doubt gas millage would suffer all that much. What compression are you looking for exactly?

Im sure more power could be had out of swapping and milling the z6 head, and using the z6 intake manifold.

 

[Nasty_Canasta]

I would stay with the B7/A6 head. Mill it, get a cam, adjustable cam gear,
springs and retainers, and a good tune / street tune. The B7/A6 head is a
great flowing head. It just needs a little help.

 

[TheSaint]

im at the same decision at the moment
i currently have a D15b7 with a6 cam and z6/y1 intake manifold
and im really suprised at the performance i get from it

BUT
i picked up an entire D16y1 (aus version of D16z6) for only $50
the block is stuffed - got overboosted and snapped a con-rod
but the head is all good and the entire engine had only like 140k kms on it

so im in the process of rebuilding the z6/y1 head and prepping for the conversion

apprently if i use the D16y8 head gasket the difference in compression makes up for the lost 97cc of the D15 block - no milling required

i still have no idea what cam to use tho =/

 

[Fabio213]

baajaa
i want to stay around 11.1 compression and to Nasty_Canasta:i dont know if i want to tune right away or if i have the money at the moment so yea what can i do if i dont wanna tune right away?

 

[Fabio213]

THE SAINT:
yea man the setup we got now makes pretty good power but we gotta go bigger than everyone else in our town, and thats cool what ur doing with that block hope it comes out nice and on the cam option well everyone always says 272 delta is a really good cam but i dont know if ur like me that drives a lot then i dont know what to tell u.

 

[christopher_davis]

stay b7 and keep it simple. Many many happy people with b7 head, like stated above it just needs a little cam help.

 

[ninjajp]

im at the same decision at the moment
i currently have a D15b7 with a6 cam and z6/y1 intake manifold
and im really suprised at the performance i get from it

BUT
i picked up an entire D16y1 (aus version of D16z6) for only $50
the block is stuffed - got overboosted and snapped a con-rod
but the head is all good and the entire engine had only like 140k kms on it

so im in the process of rebuilding the z6/y1 head and prepping for the conversion

apprently if i use the D16y8 head gasket the difference in compression makes up for the lost 97cc of the D15 block - no milling required

i still have no idea what cam to use tho =/

use the z6 it has more aggressive timing. Usually a good y8 z6 combo is the z6 bottom with the y8 head, z6 bottoms although similar dont have oil issues. The delta 272 is a cam made for anyone who doesnt like bisimotos prices. They come recommended by alot of people who trust their work. Its pretty much all you would need in the aftermarket field. good NA apps, good boosting apps. good all around cam.


Chris davis is right too though, the b7/a6 build is one of the most popular among nonvtec builds, just get yourself a z6,y7/y8 cam,and gears. I know the y7 isnt vtec but its a good one nonetheless. y7/y8 builds are common too amongst mini me's.

 

[TheSaint]

i already have
- Audm D15b7
- Usdm D16a6 Cam
- Bisi Cam Gear
- Usdm D16z6 intake manifold
- ebay 4-2-1 header
- fujita cai black
- Jdm D15b Vtec Gearbox

i was planning the following
- Audm D15b7 Block (already on car)
- Jdm D15b Vtec Gearbox (already on car)
- D16y1 Head (same as D16z6 - have it in shed)
- very light pnp on the head
- 1mm oversized intake valves
- 2mm oversized exhaust valves
- some sort of cam
- re-use bisi cam gear (to be honest its not very good tho)
- re-use z6 intake manifold
- D16y8 headgasket

im happy with the D15b7/a6 cam setup - but i would like a tad more torque and a bit more shazaam in the top end - but i duno =/

whats the 272 vtec crossover like? smooth or aggressive?

 

[Nasty_Canasta]

baajaa
i want to stay around 11.1 compression and to Nasty_Canasta:i dont know if i want to tune right away or if i have the money at the moment so yea what can i do if i dont wanna tune right away?

If you don't want to tune, just set your ignition timing to 18 BTDC. So build the
B7/A6 as you would and just wait.

Also, chipping your ECU is pretty cheap. A Willem chip burner is also cheap. You can
have the ECU chipped or do it yourself. I paid $25 for the chipping kit and $32 for
the Willem Burner. Add in a bunch of homemade street tune crap and I got off pretty
cheap. $57 for tuning ability. Even if you paid someone $50 to chip your P06, you're
talking $82 for everything you need. A good, used wideband would put you at about
$182.

For all you A6 cam guys here, the ZC cam is noticeably more aggressive
on these setups. I ran an A6 for a long time...then switched to ZC. I flip flopped
from ZC to A6 and back to ZC for an experiment over the last couple weeks
and the difference is real. Through the entire powerband.

Edit - By reading the cam numbers, you'd never think there'd be that big of a
difference.

 

[ninjajp]

with a good zc? as an owner of one i believe it. The a6 is supposed to be similar to the ZC but cmon now, the japanese always give themselves the better equipment, some people might not care or think it matters, but it does.

 

[Nasty_Canasta]

with a good zc? as an owner of one i believe it. The a6 is supposed to be similar to the ZC but cmon now, the japanese always give themselves the better equipment, some people might not care or think it matters, but it does.

Yep. The intake on the ZC is .233". Mine is like new. No wear. And I'm not the
kind of guy to throw a header or something on my car and "feel" the power.
But it really is noticeable. When I tossed the A6 cam back in my car as an experiment,
I thought I had put the cam on retarded even though I hadn't.

I believe the SOHC ZC was rated at 10 hp more than the A6. Correct? The
only difference is the cam. Not saying it has added 10 whp by any means...
but whatever power it has over the A6, you can feel it. Feels more "alive"
for lack of a better word.

I also run my lash tight. Nice snug 7 on the intake and a snug 9 on the exhaust.
Used that for both cams.

 

[the hoove]

i already have
- Audm D15b7
- Usdm D16a6 Cam
- Bisi Cam Gear
- Usdm D16z6 intake manifold
- ebay 4-2-1 header
- fujita cai black
- Jdm D15b Vtec Gearbox

i was planning the following
- Audm D15b7 Block (already on car)
- Jdm D15b Vtec Gearbox (already on car)
- D16y1 Head (same as D16z6 - have it in shed)
- very light pnp on the head
- 1mm oversized intake valves Not needed
- 2mm oversized exhaust valves Def not needed
- some sort of cam
- re-use bisi cam gear (to be honest its not very good tho)
- re-use z6 intake manifold
- D16y8 headgasket

im happy with the D15b7/a6 cam setup - but i would like a tad more torque and a bit more shazaam in the top end - but i duno =/

whats the 272 vtec crossover like? smooth or aggressive?

you will not need oversized valves. z6 heads are good to over 400 hp with the stock valve size and ports. just a simple cleanup on the ports is all ou need. going 2mm over is just plain stupid and you may run into clearencing issues going that big. bigger is not always better with N/A

 

[Nasty_Canasta]

you will not need oversized valves. z6 heads are good to over 400 hp with the stock valve size and ports. just a simple cleanup on the ports is all ou need. going 2mm over is just plain stupid and you may run into clearencing issues going that big. bigger is not always better with N/A

Amen. You can keep internals virtually stock with NA. Just upgrade the
valvetrain. Springs and retainers are your best bet. Then call it a day
unless you wanna go baller for the fuck of it..then upgrade a bunch of
crap.

I only wish aftermarket D15 rods were more abundant. That's my only bitch.
With an upgraded VT and some rods in a B7, I would have zero fear of
mad NoTecs, yo.

 

[the hoove]

doesnt fjt make high strength d15 rods.

 

[Nasty_Canasta]

doesnt fjt make high strength d15 rods.

They do...but there's the wait...and the group buys. Whenever they're
around, I never have the extra cash (3 year old boy). Just wish they
were laying around like D16 rods.

 

[the hoove]

They do...but there's the wait...and the group buys. Whenever they're
around, I never have the extra cash (3 year old boy). Just wish they
were laying around like D16 rods.

ya it can be hard to sup up a d15 cuz the aftermarket support include just slapping d16 parts on them to make them faster! LOL

 

[Nasty_Canasta]

ya it can be hard to sup up a d15 cuz the aftermarket support include just slapping d16 parts on them to make them faster! LOL

Totally. I love the D15/B7 blocks too. I like the way the B7 pulls...those
damn chicken leg rods are the downfall. I've owned my share of SOHC
vtec engines. I just love the simplicity of NoTec.

 

[Fabio213]

If you don't want to tune, just set your ignition timing to 18 BTDC. So build the
B7/A6 as you would and just wait.

Also, chipping your ECU is pretty cheap. A Willem chip burner is also cheap. You can
have the ECU chipped or do it yourself. I paid $25 for the chipping kit and $32 for
the Willem Burner. Add in a bunch of homemade street tune crap and I got off pretty
cheap. $57 for tuning ability. Even if you paid someone $50 to chip your P06, you're
talking $82 for everything you need. A good, used wideband would put you at about
$182.

For all you A6 cam guys here, the ZC cam is noticeably more aggressive
on these setups. I ran an A6 for a long time...then switched to ZC. I flip flopped
from ZC to A6 and back to ZC for an experiment over the last couple weeks
and the difference is real. Through the entire powerband.

Edit - By reading the cam numbers, you'd never think there'd be that big of a
difference.

O damn i didnt think tunning was that cheap, well it would be nice to try to do it myself so where can i get that chipping kit and that willem burner? which one should i get like is there a model i should get?
Oh and about that zc camshaft should i get that one instead of delta 272 what do u think?

 

[Nasty_Canasta]

O damn i didnt think tunning was that cheap, well it would be nice to try to do it myself so where can i get that chipping kit and that willem burner? which one should i get like is there a model i should get?
Oh and about that zc camshaft should i get that one instead of delta 272 what do u think?

eBay has the Willem Dual USB Burner. Get that one. Also comes with a chip.
Mine was $32 shipped. Takes a couple weeks 'cuz it comes from Hong Kong.

Stay with the Delta. I plan on sending one of my A6 cams there for a regrind.
Delta is good shit.