nope, no water/meth. i was under the impression that that was only necessary if you saw consistently high AITs. i appreciate the suggestion though since its another item i've considered.

 

ya the psi explanation is BS. I was running 16-17psi on the stock block, 100% perfect on 93/meth.

Thats tune related (timing or AFR) or just not enough octane. Meth would fix that.

But you can try headers and report back. If you are doin your own labor, its a pretty cheap mod

 

The water/meth system will help reduce IAT but as well reduced the likely hood of detination/preignition in the combustion chamber through the cooling affect of the water and additional fueling of the methanol. You will have to be retuned to extract the benifits of the water/meth system. ie, more boost or more timing = more power............Also you will be able to run leaner AFR's safley with the meth.

 

mos def i would do the install myself, and i'm gonna try my hardest to get the headers on the cheap.

thanks for chiming in str8dum1 - your posts were a lot of the reason i had confidence in going straight to the 2.87 pulley. did u have any pinging with the 2.87 pulley, but before the meth? fwiw, the best i can get out here in cali without going to race gas is 91 octane.

OP - sorry for the thread jack. i was planning to make a thread on this topic myself later this year.

 

all things being equal, i'd rather just put the 2.87 back on with water/meth like you suggested

 

i never ran the car past 10 psi without meth so I dunno. I was thinking you just had 91, that's probably why you are pinging past xxx hp.

A simple on/off meth kit with a 600cc nozzle is perfect. I actually still have my old pump. all you;d need is to tap your washer tank and buy a nozzle. easy and cheap.

 

I think headers are worth it if you can install it your self it helps to have a lift to. Because there is no real proof that there are gains with them or without I had mine on before the Vortech. I would also do it again as well the 2.87 pulley is the best bang for the buck mod Im ready to jump to it now lol.

 

Superchargers like a certain amount of back pressure. Physics behind it being, that if you have the exhaust flowing too freely, the fuel/air charge leaves out the exhaust before it has time to detonate. Why this is not the same for turbo's I don't know.

Read this: Interesting results.

https://my350z.com/forum/forced-indu...g-results.html

 

WTF? your statement makes absolutley no sense what so ever.

 

392 WHP on dynojet 03 350z with full bolt ons and stage 2 cams with vortech kit and STOCK 3.33 pulley. uprev dynotuned

 

ya, that makes no sense at all. This is a 4 stroke motor so the valves stay closed until the cams open it. There is nothing to do with the exhaust backpressure holding the gascharge in the cylinder to keep it detonating. it's fully burnt by the time those valves open. if not, the cam timing needs adjusted.

you're thinking of 2 stroke engines where there are no valves and the exhaust gases are evacuated from the cylinder by the tuning of the pipes.

 

I believe Synjin is speaking about this post:

https://my350z.com/forum/8387118-post6.html

 

ya, the exhaust valves are closed as the piston moves down while the intake valves are opening. If there is any overlap it's so small that there is no net effect.

That post also states that there is no negative effect even on an n/a engine of decreased backpressure.

I know this 1 person in the world had a fluke and gained hp from putting cats back on his car but the thousands that gain hp from removing them offsets that 1 odd finding. That **** happens in life. There is always something that doesn't fit the norm. It doesn't disprove all the research and facts though. Who knows what else was going on with that engine. They were old cats, how does he even know they weren't destroyed and blown out since they were old cats put back on?

i know personally i gained power from dropping cats and adding headers to increase my flow.

 

You will prob run out of MAF before you run out of flow, especially with an upgraded pulley.

 

good to know but useless for this thread.

just tune to map in the utec.