1.5 faith unquestionable - uberkomprimierter

[gldgti]

hi guys,

noticed someone doing a 1.5 turbo project - very happy to see. being in australia, theres not really any such thing as a 1.6 or 1.9.

some of you may remember i posted a proposal about a 1.5 supercharger project a little whil ago. well, doing a lot of research and investigation, plus learning even more by progressing further in my studies (mechanical engineering) im now able to say this project WILL happen.

things i havnt yet resolved:

> to rebuild or not to rebuild
> clutched supercharger or "always on"?
> pressure release valve necessary or not
> new injector nozzles a good idea?
> what boost to run - 9psi, 12 psi, 15psi, 24 psi....30 psi - i could do any of these. i want power, but i also want longevity

things im sure about:

> using a toyota sc14 or sc12, whichever i can get my hands on
> intercooling - lots of room infront of my radiator
> keeping the install hidden from the outside to lull ricers into a false sense of security
> using gasser efi manifold (will be polished and portmatched)

things i've altready got which will make it a good mod

> free flowing 2" exhaust
> access to cold air from the front (non blocked off grill)
> long ratio 5 speed gb
> nice hard suspension


if anyone wants to offer up suggestions, it'll be well recieved. cheers all

aydan

[jtanguay]

One thing is for sure.  If you attempt to go with 30 psi boost, the engine will be stressed to its limits.  I have no doubt that it would be possible to beef up the motor.

Raceware studs, somehow fit a 1.9 metal hg on a 1.5...

If you can coat the combustion chamber + valve faces + piston crown, that should make the engine more capable of receiving the amount of fuel necessary for 30 psi boost.  

A clutched supercharger would be amazing for daily driveability.  Just kick it on as you need it.

I've seen a few 1.6 TD pumps up for sale on ebay (rebuilt) for around $200 USD.  Would it be possible to mount one on a 1.5 properly?  That mixed in with some good injectors, and it would really wake the 1.5 up

[burn_your_money]

I have some TD parts on ebay that may help you

EDIT, sorry I didn't realize how long that link was

Here is a shorter one

http://search.ebay.ca/_W0QQsassZburn_your_moneyQQhtZ-1

[rabbid79]

Aydan,

I'm assuming your rebuilding your engine for more strength.  If so, do the head bolts, and head gasket.  I'm sure you're already aware of the 11 mm Raceware (and possibly ARP from techtonics tuning) fasteners that are available.  I don't know of a source for metal head gaskets for the 76.5 mm bore/mechanical lifter heads though.  zsimports.com sells 1, 2, or 3 notch "diesel/turbo diesel" head gaskets for 11 or 12 mm head bolt solid-lifter engines.  I'm guessing these are better than the original head gaskets that came on our 1.5 L engines.  I'm not sure how feasible it is to modify a 1.9 gasket.  Between the coolant passages, oil passages and the fact that the 1.9 had a much larger bore, I think there may be too many differences.

I think newer/bigger injector nozzles are a good idea for several reasons.  First, you'll need a bigger nozzle to inject more fuel in the already small injection window.  Smaller injectors will cause fuel to be injected well into the power stroke, which will result in unburned fuel (lost HP and black smoke), and higher EGTs.  After installing the larger nozzles, have the injectors pop-tested and adjust the breaking pressure to be at least as high as the TDs.  As I understand it, the breaking pressures needs to be higher to help offset the higher dynamic compression ratio of the boosted engine.  This will help ensure that there's enough differential between the injection pressure and the cylinder pressure to quickly inject, and fully atomize the fuel.

I would personally be in favor of a clutched SC, although I have no idea what it would take to implement a system like that.

As far as what boost to run, I have the same delimma.  Since my turbo won't be wastegated (VNT), I'm kind of at the mercy of its open nozzle boost characteristics (which I'm hoping is around 15 lbs.)  From there it can only go up.  I'm not too worried about how to limit how much boost it has initially.  They say to lower your EGTs, add more boost.  What I am worried about is fueling and how much heat it will add when I start to go with significantly more fuel than stock.

[gldgti]

thanks guys.

well its definately a rebuild thing then, which is ok, means i need to save up longer then.

im not overly worried avout skyrocketing egts with the supercharger, given i'll be intercooling and there will be no restriction in the exhaust, so i dont think i'll be coating things with ceramic (as much as i do actually like the idea.

my aim will to be to run adequate boost to give me a situation where, given the injectors and nozzles are overhauled, i can get good power (not crazy) at all revs so in the future be able to maybe put a "super IP" in. for beginning, i'll be keeping my regular pump, and likely start with relativelt low boost (10-12 psi).

[burn_your_money]

I have some TD parts on ebay that may help you

http://search.ebay.ca/ws/search/SaleSearch?sofocus=bs&satitle=&sacat... etc, yada, yada, colon slash slash

This would be more appropriate in the "For Sale" forum.  The link is sooooo long that now I have to scroll until next tuesday to read anything that anyone else writes in this thread.  Very irksome...  You might consider shortening it (tinyurl?), moving it, or erasing it altogether.  :wink:

Andrew

Sorry bud, I quickly made my post and then went to look at another thread. I didn't realize that this forum doesn't automatically shorten the URLs like on vortex. I editted my original post. While you were in "next tuesday" did you happen to catch fridays winning lottery numbers?