5 psi for a built d16a6? any advice on the setup? - Honda Forum / Acura Forum

crx4life2002 · 08-05-2002, 11:48 PM

i am debating setting up my d16a6 for turbo. im looking to boost at 5 or 6 psi and plan on intercooling it. i have a b&m fuel pressure regulator as well as port polish 5 angle valve job shaved .40 for compression at 11 to 1 chipped ecu jg throttle body headr back intake and 1.8 ls injectors. should i build my lower end for just 5or 6 psi or am i safe to boost away
i think the 1.8 injectors will flow enough and i can richen it with the fpr. do i need a vortech fmu? any advice would be helpful. all motor just doesnt do it for me anymore. thx

Honda_Guy · 08-06-2002, 12:24 AM

Is this going to be a street car? Because if it is, you'll be in trouble already. 11:1 compression is going to be really pushing it on pump gas, and thats without the boost. Dont mill the head any more than necessary to make it flat. If all you want is 5-6psi, then the stock bottom end should take it. 5-6psi doesnt even really need an intercooler, but it will help make things extra safe. I dunno about the fuel stuff.

PSIKOTICsi · 08-06-2002, 07:58 AM

the b18a injectors wont help any because they flow the same as the d16a6 injectors(240cc). you are gonna need a fmu because what ekse is gonna be adding the fuel needs for a turbo setup. 11:1 cr isnt gonna help you any......the lower the compression the better for turbocharging. your stock bottom end can handle 5-6 psi.

crxrocks · 08-06-2002, 08:20 AM

But, can the stock bottom end support 5-6psi at 11:1?

Chris

5gencivic · 08-06-2002, 09:54 AM

Quote:

Originally posted by crxrocks
But, can the stock bottom end support 5-6psi at 11:1?

Chris

in theory or the real world?
in theory yes you could make it work... in the real world... street conditions, gasoline quality and tuning will say anywhere from probably not to no.
so i'd get a stock head and then try this...

crxcel · 08-06-2002, 03:57 PM

I have a jrsc with 9.5:1 compression and it already has detonation problems so I can imagine what 11:1 would do to it. Without race gas i say a meltdown.

skidtron89 · 08-06-2002, 05:13 PM

Quote:

Originally posted by crxcel
I have a jrsc with 9.5:1 compression and it already has detonation problems so I can imagine what 11:1 would do to it. Without race gas i say a meltdown.

I totally believe you but that is mostly due to the in-efficiency of the supercharger compared to a turbocharger. He could probably get away with 10.0:1 but much higher than that is gonna take more tuning parts than the whole cars worth. BTW like the guy above said just get a stock head and then you can run 8psi if your careful......

crx4life2002 · 08-07-2002, 12:44 AM

what if i run 2 head gasketrs to make up for the .40 i shaved off the head to drop the compression to almost stock level? is this kosher or should i re work my stock head for the boost

Honda_Guy · 08-07-2002, 04:31 AM

Quote:

Originally posted by crx4life2002
what if i run 2 head gasketrs to make up for the .40 i shaved off the head to drop the compression to almost stock level? is this kosher or should i re work my stock head for the boost

Not the best idea to run 2 gaskets. Perhaps you could get an extra thick metal one or something, but ideally you start out with a stock height(unmilled) head.

5gencivic · 08-07-2002, 05:12 AM

if you're having problems with your supercharger boosting on a 9.5:1 compression ratio then it's a fuel problem or something else. you should ask a question listing your mods and psi as well as the conditionn of the car and they'll beable to help you out.
two head gaskets or even a thicker metal headgasket is not a good idea in my opinion. lowering compression with gaskets is a good way to get gaskets to fail. you are essentially adding a larger ammount of area for the pressure inside the combustion chamber to push on. the thicker that area is the more it can push the more likely the gasket to fail.
i'd start looking on ebay and find yourself a good stock head. get a valve job and port job done on that and then swap heads out when you install the turbocharger. shouldn't be much of a problem just a bit more time.

to answer your original question more clearly... can you run a turbo on 11:1 compression ratio? yes you can, however it will take a good long dyno session and a fat wallet to provide all the fuel mods you will need to accomplish this goal. also the stock internals of your motor are alreaedy being pushed past what they normally take... adding boost ontop of that stresses them even more.

skidtron89 · 08-07-2002, 09:05 AM

5gencivic says it all right there.........

just not in the usual a-hole way I would though. I think the guy on the other post is still crying about my talking ZC motor reply.

crxcel · 08-07-2002, 01:15 PM

what does your car run in the quarter SKid