[fredio54]

Originally Posted by bleedsblue0023

Dp is direct port injection rather than wet or dry inj. So instead of running a manifold shot you spray into the head, minimizing loss and maximizing power and atomization (thats what I meant by no puddleing, since you arn't spraying a gas/no2 mix though your mani, that backfire doesnt happen)

right, gotcha, i wouldnt have it any other way. even fuel mix is VERY important.

At least in the part of the US that I live in no2 is legal in your car, just not hooked up, meaning turn the bottle off and you are fine. As far as fill ups go you might be surprised to find how many there are.

ditto in nz, its legal so long as its off. where do you think i do the vast majority of my "spirited" driving? thats right, on the street where no2 is illegal. also, i strongly doubt that i can fill that no2 bottle at the top of ruapehu before my desent after using it all up on the ascent before a day of skiing etc etc ;-) nz != usa and i dont like cities.

It WILL aid spool. Nitrous/fuel mix added in your "spin-up" or "lag" rev range via a window switch/nitrous controller/MSNS (if you have the option) and a wide open throttle switch makes sure you only run the shot you need during the time you need it: foot to the floor, waiting for the turbo to spool. The best part about the system is the lack of hard explosive wear and tear of your engine. If 50hp worth of no2 removes the lag for you over say
2000-3750rpm, hell go with a dry shot with $300 and 2 hrs max install time you have on demand anti lag. since you are not running w/ it for horsepower the bottle should last quite awhile.

yes, i know it aids spool, but its also on and off, ie, it wont keep my throttle response steady and smooth on a micro second basis that i need.

thing is i'll still get lag, so i'll get nitrous below x psi, and then a dip and then lots of boost. there is no way of transitioning a system like that without excessive staged injectors for it. and that would still only be a hack for my purposes.

the legality of any als system is up for grabs ESPECIALY a wasted spark/rich system. Even and air induction/rich system is going to get you noticed.

if its switchable, and doesnt involve fuels in the exhaust, and brakes that dont work because the throttle is always open, then i cant see it being an issue. they generally only regulate against things that lots of ppl do, and not many at all do that (or id have found some dude with a project that had done it going "heres how"). also, the retard version is easy to switch on and off in software, so couldnt be proved to be installed at all.

noise wise, i'm sure you are right, but our laws are a bit different thats for sure, and sitting at 3k (with the als switch off) with 1m from the rear of the vehicle on a 45 degree angle from the exhaust must measure X decibels or something like that. because its so custom, it will be certed and effectively i am the manufacturer, and it is the original exhaust system, so the cops wont be able to take it based on that (if the bastards can catch me).

Have you ever been next to a gt car running als? You'd prolly get arrested b/c of noise alone.

yeah, i know its loud :-)

Just throwing ideas out there..Could it be that the set up alone be flawed? The light back of the ute with improper rubber or suspension leading to a non progressive slide condition? Exessive lag causing a boost hit that unsettles the car itself sounds like a turbine sizing issue. Can you resize the holstat housing with out scrapping your set up? or run a smaller impeller?

the exhaust side is the smallest available for the hy/hx series, its only 9cm2... evo tdo5s are 7cm2 and support 2/3 the hp. it spools ok, but it unspools very quickly and the spool isnt instant, and thus no good for skids.

as for the vehicular aspect, no, its sweet. when the wastegate was open, i could skid it to 70mph top of third with ease and perfect control (wet). no problem. its the contrast between 17psi and 2psi that kills me. if it was 3psi and 1psi, its not too big a deal. for reference, it was probably making about 190hp at the crank from duty cycle logs at the time. a bit more than a stock fe3 courtesy of the free exhaust and slick intake and 3.5psi of boost in the top end. it was very nice to drive like that.

reducing the boost pressure to a half its current level could solve the issue somewhat too, but that also reduces the power ;-) if i cant get something working, i'll buy a td05 of vfXX or t28 and set the boost to 10 or 15psi or so and see how it goes like that. silvia and subby and evo ppl have no issues with those turbos for response, so i should be ok too. i'll be pretty severely limited by a little turbo like that though. for winter and track use though, it will be ideal.

thanks again for your input, the more the merrier :-)

ps, there is some serious crap in that pdf i linked. and some really good info to balance it. eg, it says copper spark plugs > iridium > platinum whereas the copper should be on the rhs of platinum...

cheers, fred.