Re: G60 Questions, Boost kick in, (Long)(for a rocco)

["Wm. Josiah Erikson" <wje97@hamp.hampshire.edu>]

This sounds like a KICKASS idea. I've seen turbo/supercharger kits for MR2's, but
never for a VW : )
    As far as dealing with predetonation, have you thought about trying to graft
in Saab APC? That would be really cool... I think some listmembers were talking
about it awhile back. APC supposedly monitors turbo boost, ignition timing, engine
load, emissions, and maybe a couple other things, and automatically adjusts fuel
mixture, ignition timing and turbo boost for optimum power/mpg. My ex gf has a
Saab 900 Turbo 16v, and it's neat to notice how the higher octane gas you put in
it, the higher the turbo will boost. This because the car is sensing preignition
and not allowing the boost to go above a certain level when you run low octane. It
runs fine on 87, but it's a lot faster on 93 (yet another case where higher octane
= more power, indirectly).
    -Josiah
    '84 GTI
    '87 QSW
    http://bork.hampshire.edu

XXSpArCoXx@aol.com wrote:

>         OK I've been thinking over the route of my new block. I was just
> going to build a 2.1 16v naturally aspirated motor with high compression and
> an electromotive map able brain. No biggie been done before and it would
> probably be a fun motor.
>
>         Then I was thinking I've built a 1.9 16v high compression motor which
> is fun but loud and narrow power band. How would the auto industry get rid of
> this problem. forced induction? OK so now I'm thinking a turbo or super
> charger on the block. Now the problem is I have to decide where I want the
> boost to really kick in. With a turbo I have a choice of how slow or how fast
> it will spool up.
>
>         Now if I was going to have a turbo I would want it to build up good
> pressure in its mid range so I would have a insane top end. Well, 16v bottom
> end power isn't that great. NOS would work to get rid of lag but I don't want
> that I can just do that to my motor now and avoid building a new motor. Then
> I was thinking twin turbo's running sequentially like an RX7. But it doesn't
> look like I would have enough room for two small turbos. Well, maybe really
> small ones and I don't think I would be happy doing that work to have two
> tiny turbos with little boost.
>
>         Now comes the G charger question. Can I get a g charger to build
> power in the low and mid range and have the turbo take over in the mid and
> high end. I've seen this done in a few Porsche 911s. But they aren't using G
> chargers.  Most of the ones I saw where custom geared for specific boost
> pressure at specific Rpm's. Can I get something like that done to a G charger?
>
>         Now I know there are other chargers out there but I want to stick to
> a G charger. I haven't decided on a turbo yet. One thing I did decide on was
> I was going to have a High compression and low boost charger or chargers.
> Probably the 9.5 to stock 10.1 range on the block before boost build up.
> Another thing I'm taking from Porsche guys.
>
>         Another question is how do turbos deal with knock. Last I heard more
> then 12.1 to 1 compression would cause knock and detonation. Do they use dual
> knock sensors or is it in the ECU's mapping to deal with that. If its the ECU
> I would have no problem. If its not then well Hmm I have more problems to
> deal with then hood and engine bay clearance.
>
> Thanks for the time for reading this.
> Oh if you got nothing nice to say keep it to yourself and lets not let this
> get out of hand on the list.
> Thanks
> ~Danny~
>
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