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Street Class Unlimited Class
DOHC SOHC Ion Updated 1/05 For the most recent list of the fastest five cars click here. |
Ian's Turbo F.A.Q. - Page 3by:Qksl2The last option is a full stand alone fuel system. I personally like the Haltec system. However, this is a whole different ball game, and I do not recommend this for anyone who does not want to really spend some time getting everything dialed in right. You'll definitely want to have a shop help you with this! The cost is going to be well over $1000. Update: The Turbosaturns.net guys are working on what's called the Megasquirt, which is a DIY fuel management system. It is not a full stand alone in that it does not control timing. However, it has complete control over the fuel system. It will allow us to run very large injectors and tune completely for boost. Chris and Mike are also in on this, and a big thanks to Canadian Ben for pioneering the subject. So far, several turbo Saturns are running this with great success.
It allows for total control of your fuel system, the use of nearly
any size or impedance injectors, and is very cost effective. The
entire system can run you less than $250 including sensors. It uses
a VE (volumetric efficiency) table to calculate the injector pulse
width (time that the injectors are open when firing for each revolution
of the motor). Because so many of us are switching over to this
system, it is becoming easier, faster, and better to use by the
day. Thanks to the work of many of the board members, we are rapidly
accumulating several VE tables all ready to go...your car will fire
up on the first crank. The idea is that, if as many of us use this
as possible, we can all help iron out fuel maps that will work for
many different situations. Just as the Turbosaturns.net turbo manifolds
are the answer to your manifold Please visit the board (www.turbosaturns.net) and check out the Megasquirt section. Its full of useful information, as well as some FAQs, and info on how it applies to a Saturn application. This is an involved project for sure but very well worth it. It may seem intimidating at first, but I assure you it will become more understandable the more you research this. It is YOUR responsibility to look into this, to research, and to understand it. Question: I was just thinking about this the other day.
Would it be reasonable to get the Megasquirt now, install it on
my car, So what do you think? Seriously, would it be a good idea? Or should I just wait until the later part of life? It's easy to build a high compression, cammed, pumped up n/a Saturn and run 16's. This happens, and it happens often! Why? Simple, we'll spend $3000 on building up a sweet array of parts, but the tuning will be so far off you won't make any power. Just as the MS is the greatest thing to have happened to turbocharging Saturns as of late, it's the ultimate tuning solution for slow n/a Saturns. That along with a WBO2 sensor will be the setup to be desired. I see an easy 10-15 horsepower in tuning a n/a Saturn with the Megasquirt. For the cost, as well, you can't beat it! Information Board: http://turbosaturns.net/forum/viewforum.php?f=16 Recommended Fuel Pump Walbro 255lph (also the same as the BBK and Holley fuel pump). This fuel pump WILL fit the Saturn. However, it WILL also require
custom modification. The Walbro is a reputable brand with very reasonably
priced fuel pumps, which flow more volume than the stock pump. It
is not a pressure based pump, though. If you plan on running a RRFPR
or high fuel pressure, add an MSD inline pump for extra pressure
potential. Simply adding an MSD inline to the stock system will
not give you more volume. It is highly recommended that you wire
the pump with thicker gauge wire and double ground it, if necessary.
When I complete this modification, I'll have detailed info and pics.
Until then, we atleast know there is an option that works, even
if it isn't bolt on. Plus, every time I see the word, Walbro, I
think of a walrus. I Update: Titan has installed a 255lph walbro on his 97SC2 without any modifications. It's a direct bolt-in! There is no perceivable nosie eminating from the fuel pump while the car is running, you can only hear it on startup just like the normal pump. Originally we were worried that the stock regulator wouldn't be able to hold back the extra fuel but the fuel pressure has remained the same. If your looking to make 300whp or more this modification is highly recomended. If you have a 1997 or later car than you will need the GSS317 fuel pump. Were still working on a walbro pump for pre-97 Saturns. Recommended Spark Plugs NGK BKR7E(s-11) (DOHC and SOHC) You can go with a "6" heat range plug, which is "hotter" and more prone to detonation. The stock heat range is a "5". "7" has been optimal for boost ranging from 4 to 20 pounds among our communities experience. Start your gap at .025 or so and work your way up until the boost blows out the spark. The car may idle differently on cold mornings (with a slight misfire). The MSD DIS-2 will take care of most of this. Otherwise, it's fine once you are on the road. These plugs are available from Saab and Volvo dealers, as most Kragen/Autozone's will NOT keep these in stock. Advanced auto parts has them in stock and Pep boys carries them as well but they always seem to have to order them. Look for the factory turbocharged cars... Ignition The MSD DIS-2 is optional and works fine on OBD-I cars (up to 95).
Contact MSD for OBD-II cars. MSD wires and the Intercooler I very highly recommend an intercooler with your turbo setup. It will cool off the intake charge greatly, and a cooler intake charge means more power and more detonation resistance. This is pivotal with an engine not designed for boost. It allows for a buffer zone against detonation and more consistency while running repeatedly. A great intercooler is the Starion intercooler.These can be found on Ebay commonly for not a lot of money. They utilize the same core as the Lancer Evolution, so it flows very well and is efficient. Other options are the ginormous Twistec intercooler, or a custom Spearco. Mounting a front mount is not too difficult on most Saturns. It will require trimming of some of the plastic baffling, though. Intercooler Piping The best piping to use is 2 inch "hot" and 2.25 inch
"cold". The reason for this is the velocity and air density
change as it goes A blow off valve is necessary. It relieves pressure in the intake piping created by the spinning
turbo between shifts when the throttle plate closes. It is to prevent
damage to the turbo from spinning backwards, known as compressor
surge. I like the Turbo XS units, though HKS and Blitz also make
very nice ones. These can be commonly found on Ebay or other parts
places. The vacuum line reference should go to the intake manifold
for an accurate reading. Look for a small article soon on making
your own "vacuum distributor". |
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