Rolls

what is the purpose of injecting the methanol along with it, I'm a bit confused? the methanol doesn't absorb the heat as well as the water, it also combusts meaning you need to lean out the fuel a bit.

if anyone hears any info about the people who might have had something to do with this me and willy would love to hear, just hit us up with a PM. pack of c unts filling it with oil, don't even know how to torch a car.

But it doesn't, the top end would be identical with or without VCT as it isn't active after 4.5k. Basically if you do a dyno run with VCT on and off. you'll see the top end is the same, it is only the bottom/mid range that is fatter with the VCT on for the 1 to 4.5k window. edit: Oh right johhno, I guess thats not really the VCT doing it though, it is the different cam profile, but I get what you are saying.

Yeah that's what I thought, cheers for that.

Yeah it certainly does make staying on peak torque for longer a lot easier. I guess I just always found it difficult to flog through the hills/circuit with an auto, compression lock when shifting down, kicks out unexpectedly when it changes up around a corner etc. Though for a purely street driven car I can see the appeal.

I really doubt it will make any positive difference. Porting is usually for when you are making massive power and need the extra flow, you don't do it for low down response. For low down response you'd be better off making a custom intake manifold with massive long intake runners, or increasing the stroke, but as mentioned before once you spend any money this project becomes stupid and you should have just invested it into an rb25/30.

That is the whole point, porting a head usually decreases velocity and makes it worse down low.

Do you get the same benefits combining water/meth with E85 as you do with 98 octane? Or is there sort of an octane limit where the increased knock resistance doesn't help you extract any more power? Thanks for the answers anyway, I might look into it in the future.

Yeah on the strip the auto will always be preferable, Id say on a circuit the manual would be almost certainly preferable though. However I guess I was more asking about daily driving as that is what I assume you guys are using your cars mainly for.

Not hating on automatics but just curious what draws you guys to them, apart from it being nicer in stop start traffic around town what makes you guys stick with them?

What sort of gains would you expect on an rb25 with a ~250kw turbo that has maxed its capabilities out (eg hot intake air), would it let you run much more ignition timing to make a difference?

Would never replace with second hand personally, even if its known to be good.

Quite a few people do this when converting neo or 26s, just chop the ignitor module off and wire them up that way and it should run fine. If the coils are relatively new shouldn't be an issue. What is the reason for wanting to do this, are you transplanting an R34 rb26 in an R32?

My mates with rotaries would fould plugs trying to start and flooding it, then it wouldn't even splutter just turned over with nothing. It is easy enough to pull one and see if its black with soot, usually a bit of steel wool on them to brush them clean is all they need.

VCT only helps down low/midrange by advancing the intake cam. Above 4.5 or 5k (can't remember the factory point) it turns off as it would kill top end power.

Use these, everything else sucks. Agree that blowing a cooler pipe off scares the shit out of you, sounds like you put a piston through the block and then it won't idle, worst feeling ever.

Air pressure does not directly correlate to how much air you have, you need air temperature as well and you need to know load. That is why I believe it can be less accurate, obviously the maf sensor isn't perfect though and only has a certain range that it works in. Basically Im under the impression that there is more guessing with a MAP + IAT to get a table that can plot load vs rpm in a way that will be correct in all situations. Someone feel free to correct me though, that was just my understanding.

Do the 33 and 34 ecus ? I didn't know that.

on a turbo car air temp just sounds like such a useful sensor to have even with a MAF, no idea how people try and tune a microleb without one.

whoops

Yeah I always thought a MAF gave your far more information than a MAP + air temp sensor. MAF tells you how much air there is, MAP + air temp lets you guess how much air there is.

Pretty much never unless you are too stooge to get big enough injectors and compensate by increasing rail pressure, that or you are running some stupid hp and decide a rising rate makes things easier to tune.

chain them to the back of a car

Can you do a non linear scale with nistune? I know you can with some other ecus.

What turbo? edit: just saw your post, how on earth do you get a GT3076 on boost by 3k? Most people are seeing 3.5 to 4k ? Was that with some ridiculous ramp rate?