[busychild]

I have a start on how I want to setup a D16a6 for NA. I looks to be the following:
Zdyne SECU
machined/balanced bottom end
Exospeed Stage 2 head pkg.
Exospeed SR 909 cam
Si tranny
shaved/balanced flywheel
upgraded clutch

I need suggestions on the following:
Pistons?
Intake manifold
Throttle body
FPR
Fuel rail
Injectors(none right now)
header
head(vtec or non-vtec)
spark plugs
gaskets
I had the idea of going boost but scratched that idea in favor of NA. The SECU includes Vtec and Nitrous, and a small shot of n20 looks to be a little farther down the way... Only limitations is that it is emissions legal and to run on PUMP GAS.


This is my project car and I prefer to take my time and learn as much as I can along the way. I hope to learn from you guys experiences and ideas too. Thanks!

 

[robtec]

i am sure that exospeed heads perform very well,but do you consider other options??endyn,alaniz, etc...same for the cam,crower,skunk,crane etc..i have the crower stage 2 and it performs.

for pistons ,you can use pm7,11.5cr on an a6 and 12.5cr on a z6

im,i hear that there are clereance issues with the skunk im.dont know about the edelbrock,you can use the y8 im.with a b series tb.

about the fpr ,in my opinion all fpr do the same.y have an arossped and it works fine.

you can use a cometic head gasket,they are great.

good luck with the project

 

[Guest]

I'm going to throw out some things...not because I like to hear myself talk, but because I did the EXACT same thing 2 years ago.

1. Forget the Zdyne. For naturally aspirated(NA), it's just not worth the $1000 price tag. With ghettodyne, Turboedit and even the V-AFC available, that's a grand that can be better spent elsewhere. On the dyno, I was able to squeeze an extra 9 hp tuning the Zdyne. I thought that was great until I saw someone squeeze an extra 8 hp out of an adjustable fuel pressure regulator and fiddling with ignition timing.

2. Look at the hybrid ZC/Si instead of a stock Si tranny. Drive a DX and Si tranny back to back. You feel a difference...you get this same improvement between a Si and hybrid ZC/Si. Each gear pulls harder and every shift puts you in the exact same place in your powerband.

3. The big attraction of a y8/z6 head is that you bolt it on and you get high compression and an aggressive cam(the high lobe, anyway). You're already talking aggressive cams and high compression pistons...going with a vtec head would overly complicate things.

4. NA, there's no reason to start thinking upgrade fuel injectors/fuel rail until you're making over 160 hp. A good adjustable fuel pressure regulator will do fine. For good measure, get your stock fuel injectors cleaned.

5. If you're thinking NOS...I would be looking at something easy and safe like the ZEX wet kit. Less chance of mixture problems like some dry kits(kaboom!). An upgraded fuel pump would be a good idea.

6. The y8 intake manifold is a good design. It will involve juggling some sensors around(MAP and IAT) but as previously mentioned, you can use the larger GSR throttle body.

7. Port match the intake and exhaust manifolds to the head. Increases/smooths air flow into and out of the head..making more power.

8. Pistons...aftermarket is expensive and again, NA doesn't justify the expense. I like the D16a1 pistons for the compression. If you want to make them tougher, look into http://www.swaintech.com/price.html. Get the tops coated to reflect heat and the sides coated for better seal and heat dispersment. It's not expensive and it works.

9. If you want to play around with compression specs this is a great tool: http://www.knology.net/~jediklc/D.htm I would say over 11:1 is the point you start seeing diminishing returns on power improvement versus headaches for tuning out possible detonation and pump gas reliability.

10. Use a metal head gasket from a D16z6. Get a set of ARP head studs. This will seal your block/head way better then stock. Those stupid D16a6 paper head gaskets blow like a cheap hooker.

11. Lightened flywheels are great, I love mine. Look for an aluminum flywheel with a steel friction surface. I've never run one but I hear chromoly is great for strength/weight but it's expensive...
Personally, I wouldn't get anything lighter then 12lbs on a daily driver. Some people will claim the 8lb flywheel is great for the street but these are the same nuts running stripped interiors and roll cages for commuters.


Okay...I'm done. For now.

 

[Guest]

Pistons: the budget way would be the P29 pistons which would help increase the compression on your block.
Intake manifold: Ideally, the best would be something like the Edelbrock or the Skunk2, but a Y8 mani is good enough for budget setups.
Throttle body: if using the Y8 mani, you can fit some B series stock TB on there. but a ported a6 one will be good as well if staying with the A6 manifold.
FPR: its not the best, but the B&M style will serve its function to help tune for basic setups.
Fuel rail: stock is fine... no need to upgrade.
Injectors(none right now): depends on how much power you want to make, for mild all motor A6 applications, the stock injectors will be fine.
header: I suggest investing in a Bisimoto header for the D series. if you are really serious in wanting more power out of this motor, this is the header for you.
head(vtec or non-vtec): A6 nonvtec head for more options of camshafts, VTEC head because of the vtec function... your preference.
spark plugs: NGK are fine.
gaskets: OEM

 

[busychild]

thanks guys! Anyone here have dynos on any head cam packages using the D16 with an a6 head?

As for injectors, would stock injectors work even when I bump up to nitrous?

For cams, can any tell me where I would not want to go with as far as emissions laws? I would have no problem with a loapy idle as long as I pass the sniffer in TX. :wink:

 

[busychild]

b u m p

 

[Guest]

Fuel injector choice depends on what kind of nitrous kit you go with.

If you get a dry kit that depends wholly on the fuel injectors for all fuel delivery, then you'd probably want to look at some kind of upgrade.

If you go with a wet kit that uses auxilary fuel injection(there are several different kinds and manufacturers), then the stock fuel injectors aren't being asked to do any extra work and will work without a hiccup.

And I can't stress enough...whichever way you choose, don't try this with a 15 year old tired ass fuel pump. It's asking for trouble.

 

[busychild]

SO...can I use p29 pistons with LS rods? If the machine shot needs to do it, what do i tell them specifically? H E L P

I have the following now:
D16a6(block,Head,IM,TB,exh. Manifold)
Zdyne SECU
Si tranny
shaved/balanced flywheel
upgraded clutch
resistor box
Y8 Intake manifold**
b18b TB**

**pending**[/i]

 

[busychild]

bump