Forced Induction Guys (supercharger)

[OSF]

Hey just wondering if anyone is running a tune with a supercharger set-up?
I know it says DYNO all over the question - but - I bet there's someone out there that is cheap enough to do it
I was (hoping) maybe I could get really close without going to the dyno... I just saw these guys blow up a race motor doing crazy long pulls so im a little freaked out about my 160k motor adding to the pile.
The loss of couple ponies wouldnt be that much of a deal, if that's all it would be.

[griff364]

If you've got the ability to know what your A/F ratio is and have the ability to add fuel where you need to, then your engine won't blow.

I've got a wideband O2 sensor and the InTuner. I've got the wideband reading 12.8 through all the rpm's. I've read and asked a lot about what number to tune it to. I got some 13.0's and 12.6's. I decided on 12.8. Forcing the air in will work under the same principal. Make sure you've got enough fuel, ensure the engine has enough supporting modifications to handle the extra power, and it won't blow. You can also data log with the intuner. Viewing your data logs will allow you to see if you have any knock retard going on, which as you probably already know, will destroy the bottom end of an engine, or with small amounts of knock, take power away because of the ECU pulling the timing.

I've got an aftermarket cam, valve springs, trunion kit for the rockers, felpro head gasket, ARP headstuds, strengthened pushrods, LT Headers, and 3" exhaust. I don't even have a supercharger yet, but I'm making sure I set myself up to be able to support the extra power it gives before I get it.

Custom tunes will obviously go a lot more indepth than simply adding fuel with a tuner. They can make sure your engine and spark timing is perfect, and let you know if your fuel injectors and pump are right for the amount of fuel you need to push in.

[OSF]

for the most part, nothing has happened yet. the person I'm getting the pro charger from used t work there. he actually had it on his previous truck which was the same as mine., his father also has the same truck (guess they make a family day at the dealer lol) and he (his father) has been running the same unit for around 5yrs. he has no mods, bone stock and not even an intercooler.
the guy that used to work at procharger said they test every unit on stock motors, except for nhra cars. so I was pretty surprised when I was told I don't even have to change out my injectors. this whole thing sort of ,"happened all of the sudden" so I really haven't had any time to research much, so I'm sort of scrambling at the last moment so-to-speak.
my mods at the moment are: cai, shorties, cat back (dumped) and a Lew tune., unfortunately Lew won't touch a forced motor so I'm kinda stuck at this point.
thanks for the reply

[griff364]

I can't recommend (and I don't think anyone else will) forcing air in an engine and not ensuring you have enough fuel. Trust me, there will be times you floor this thing and if you don't have enough fuel, you're going to ruin your engine. You're going to need the warm and fuzzy of knowing your engine is drinking enough fuel. Being to lean will lead to detonation, a bent rod, and scoring in the cylinders... Hello engine rebuild.

You're currently tuned to the amount of air your engine naturally sucks in with the current mods you have. Forcing more air in will naturally require more fuel to be added. It's not about horsepower, it's about not damaging your motor.

I'm tuning with the inTuner. I'm able to data log any detonation I have (as well as a few other things). There are two ways to prevent detonation.
1) ensure you have enough fuel
2) If you are getting enough fuel, retard the timing

I use a wideband A/F gauge to know what my A/F ratio is at. I've tuned it to 12.7-12.9. Probably a tad rich, but on the safe side. I was still getting knock (detonation) at 4100 rpm and 5300 rpm. I retarded the timing 2 degrees with the inTuner and all knock went away. Now I know that when I floor this thing, my engine is safe. Of course, I'm wearing it down, but not prematurely. An A/F gauge is going to run you about $150 give or take. Then you need an O2 bung welded into your exhaust so that you can screw the sensor in.

The one thing I wish the inTuner would log is fuel injector duty cycle. I don't know how hard my injectors are working at this point. I will be asking someone who has expensive tuning software to log this for me. Maybe the Diablo Sport guys will put an update out that will make this option available.

To sum this up; do not supercharge your engine without a plan to give it enough fuel.

[OSF]

thanks for the feedback , I am aware of the fuel needs and do plan on taking a good look at injectors and a hv fuel pump.
I too am wondering about the current injector readings. I was told that one can adjust the amount of pressure in the fuel rails by dropping the vacuum-hence building more pressure in the rails., I'm not even going to try it because I'm not familiar enough with the running process. I just hate to pass up a procharger that would cost me less than $100 in products from my company...I think most people would jump on the opportunity.
I just wish I could install this without the worries of grenading my motor
I guess nothing worthwhile comes easy...

I recently just picked up a wideband af gauge, the only bummer is the tiny area I have to drill and weld too bad it can't go on the drivers side where there's more than enough room lol

[griff364]

Go ahead and buy it and install it, but DO NOT do any WOT throttle runs until you can ensure there's enough fuel. You'll get the enjoyment of being able to merge with traffic on the interstate a little faster.