Hey, I posted this in the all motor section but then I realised I`m probably gonna get more responses here.
I bought a mint 89 civic shell last summer that I`m slowly rebuilding from the ground up. Now it`s time for me to think about the motor. I have about 1500$ to spend on the engine. These are the parts that came with the car and parts I already have:

-Brand new d16a6 stage 2 ported head with 3 angle valve job. The head has been milled down 0.040"
-cbr929RR 40 mm ITB setup
-Cheap OBX intake manifold with straight runners for the ITB setup
-D-series header
-2.25" exhaust with magnaflow resonator and magnaflow oval muffler (should be real quiet )

The head came with no valvetrain or camshaft. So I was thinking about finding a d16a6 block in good shape (or rebuilt), adding a good lumpy cam that makes power up to 8000 rpms and some kind of engine management. So here are my questions:

1) what camshaft do you recomend for my setup, I don`t want to rev past 8000 rpms to stay safe so I want a cam that will give me power up to that RPM while keeping the stock valve springs and retainers. Is that possible? (a lumpy idle is a plus of course ) I would want the most agressive cam that my OEM valve springs & retainers can take.

2) I will need something to tune the the engine with the ITB setup and cam, will I need to convert to obd1 and use crome or is there a program that I can use to tune my setup while remaining ob0?

3) Are the d15b2 and d16a6 valve springs and retainers the same? I`ve heard the d16a6 vave springs and retainers can rev quite high and handle a big cam, is that true?

keep in mind my budget is around 1500$ for cam, cam gear and tuning program.

 

For the camshaft there are lots of ways to go, try contacting Will @ Exospeed for there SR909 Regrind also tell him the specs of the head. Cam gear any 88-91 Si specific atleast 6-bolt design. I read somewhere that OE sohc valve springs can handle up to 9k before valvefloat, but I wouldnt set that in stone as for tuning it all depends on budget just dont buy any ebay chips...

GL with everything!
Serdar

 

exospeed stage 3 cam(race a6) cam and get your ecu chipped for turbo edit. that will work. if not contact will of exospeed heres his name send him and instant message and tell him about your set-up. exospeedAMcrx try that to contact him. hes king at d16a6 i think

 

Consider getting in to your block and making sure everything is 100% balanced and functioning before going up to those rpm's.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by greasemonky50 &raquo;</TD></TR><TR><TD CLASS="quote">exospeed stage 3 cam(race a6) cam and get your ecu chipped for turbo edit.</TD></TR></TABLE>
I would still definately upgrade the springs and retainers if you are planning on trying to make power that high.
$1500 is plenty tp pick up the cam (Exospeed), springs & retainers (several choices), cam gear (I like Fidanza & JG) and turbo edit. Just make sure you get a 91' PM6 ECU

 

Wow thanks for the info guys!
I am gonna contact will at exospeed and his stg3 cam looks like a good choice, I`m gonna search a bit more on that!
Man that thing is gonna sound sweet in the end

 

I would check these out ... the numbers look very promising.

http://www.akmee.com/sohc-vtec

Remember, all SOHC cams are interchangable, granted that you use the corresponding cam gear.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by thenick &raquo;</TD></TR><TR><TD CLASS="quote">I would check these out ... the numbers look very promising.

http://www.akmee.com/sohc-vtec

Remember, all SOHC cams are interchangable, granted that you use the corresponding cam gear. </TD></TR></TABLE>
^^that is a nice setup. You would probably do even better with a better header

 

that akmee cam is for sohc vtec, I`m non-vtach

I don`t think I would need to blue print my block if I will only rev to 8000 rpms. The OEM d16a6 rev limiter is 7600 rpms so I`m sure it can handle 8000 rpms. I heard the problem with these engines is after 7k rpms the oil pressure drops. I know theres a trick you can do in the block where you unscrew something that has a spring inside it (oh how acurate), you put washers in and the spring will be stiffer, raising your oil pressure and keeping it high for high rpms. One of my friend with a d16y8 is running with crower stg3 cam and his engine sees 9000 rpms daily without problem with high oil press, and d16a6 blocks are supposed to be tougher than d16y8 right?

 

Yes A6's are supposed to be tougher. I would check out the S2000 oil filter. I heard because they're smaller they allow for more oil pressure. In any case, you can always head over to http://www.d-series.org and do some research there

 

I would try talking to Web Camshafts, great service and turn around time, or if you are looking for something on the cheap try Delta Cams.

 

Check out JG, they offer 4 cams for the A6...
http://www.jgenginedynamics.co...S.pdf

 

s2000 oil filter is BIGGER not smaller

 

https://honda-tech.com/zerothread/1607278

Does it really raise the oil pressure that much? I doubt it raises it enough to rev safely above 7500 rpms.

Thanks again for the links, that jg stage 3 272 degree cam looks tasty. The specs of the exospeed race a6 and the jg stage 3 cam are what I`m looking for (powerband from 3000 to 8000-8200 rpms). I guess now its just a matter of comparing prices and quality between companies.

I would like people to post what cam they have on their d15/16 non vtec and say their feedback on it, thanks.

I`ll tell you guys a secret. I`m really anxious about feeling the performance improvement because that is by far my main goal. I don`t want something extremely fast but still fun and reliable. I could skip on my car`s suspension and brakes and build a 200 whp B series but I don`t want to for now. However I can`t wait to hear the sound of that A6 with ITBs and cams. A stock A6 with an intake is already loud, can`t imagine it with my setup plus that rough idle sound hmmmm. A car`s intake sound is my ricey side, hey everybody`s got one