Please explain how my turbo works. Pic included

[Mike89]

Good afternoon all.

Got this turbo home yesterday, looks great, set up for running at 7000 ft. (thats what i run in the hills as well) what i was told is it is running from 6-7 lbs now.

Talked to the guys in Red Deer that set it up and he explained the best he could over the phone, problem is i live 8 hours aways from him and I will need to do my own tuning.

Now for running at home (1000ft) i will be running av gas ( 100).I need to turn the boost down to about 4.5 and i don't know how. By using this pic i attatched please tell me how my turbo works. I have a A/F gauge, boondocker box, and boost gauge set up one my handlbars. (don't know if that helps at all) There's the blue thing with the dial, the big silver knobby thing on the right hand side. Pardon my ignorance but i would really like to learn how this thing works, so I can tune it my self. Make fun if you want but i need to start somewhere and i really want to learn.

MIKE

 

[shadow conspiracy]

I believe that blue thing would be your boost controller. You can adjust your boost from there.

 

[Mike89]

ok, what does the silver knobbing thing do? is that a blow by of some sort?

 

[backcountryislife]

ok, what does the silver knobbing thing do? is that a blow by of some sort?

that's your blow off valve for when you chop the throttle, keeps turbo from damaging the butterflies.

 

[Mike89]

that's your blow off valve for when you chop the throttle, keeps turbo from damaging the butterflies.

Butterflies- AKA- reeds??

So all I would do then is turn the boost down using the blue dial?? How many clicks per lb of boost?? I do not need to touch the blow off valve at all??

MIKE

 

[smoothdawg]

I think if I were you I would get a friend who is familar with turbos to come over and look at your setup. Your friend doesn't have to have your exact setup, any is good. Then I'd have him talk to your turbo builder. Afterwards he can explain what all of the components are and how to use them.

If none of your buddies are running turbos then ask on the forum if somebody in your area is. Maybe if you bought them a beer they would be willing to look at it for you.

 

[Mike89]

OK, here i thought you guys on snowest knew everything.

 

[Goin For Snow]

OK, here i thought you guys on snowest knew everything.

They do know everything, and they are just doing you a HUGE favor suggesting you familiarize yourself totally before playing with your new toy. Lots-o-cash can disappear quickly with flick of the knob!
Keep reading. lots on forum.

 

[glassman]

That silver thingy is a blow off valve. It releases pressure in the charge tube when you let of the throttle. You probably dont need that, and it likely wont ever do anything if you are running lower boost. Your boost is controlled by the actuator( little cannister right behind the turbo with a rod coming off of it) which is connected to your wastegate. The pressure for that is controlled by that blue boost controller. Be advised that the actuators are designed to run in certain boost levels so just turning the boost controller down may not get you to the desired lower levels. If you want to be safe, unhook the rod from the actuator to the waste gate and lengthen it a little (say 1/4") then reattach it. Your wastegate will be open a little, and subsequently you wont build as much boost until you are familiar with your set up.
What you really need to learn is how to run your fuel controller. This will save you alot of grief.
The butterflies mentioned are the vanes inside the turbo (fan)
Good luck.

 

[Offroad Engineering]

The blue knob is basically a bleeder valve comprised of a ball bearing with a spring pushing it against a bleed hole. The knob screws in against the spring and the tighter you twist the knob, the more pressure it puts and the more boost pressure the turbo has to make before it forces the wastegate open to start regulating boost.

The big silver object on the intake piping is the blow off valve. Once the throttle bodies close it throws a pressure wave back through the intake and starts building pressure in the piping since the turbo is still spinning.

This rapid increase in pressure is hard on bearings and in extreme cases will break the shaft connecting the turbine and compressor wheels.

The rubber line should be running from the motor side of the throttle bodies to the wastegate and a difference in pressure between the motor side of the throttle body and the intake piping will allow the valve to open thus discharging the excess pressure.

This achieves a second effect of allowing the turbo to spool up against a lower pressure thus giving faster respool times.

To lower your boost to 4 lbs you will need to make sure that the wastegate is capable of going that low and you need to ensure that the spring in the blow off valve is that low as well.

You can pull the blow off valve apart and see what spring is in it and if needed order a lighter one from Tial to correspond with your 4 psi boost.

You then need to verify that it is a 4 lb actuator on the turbo. If you open the boost controller all the way or just remove it and splice the hose together the turbo will only make wastegate (actuator) pressure.

Have fun with the turbo, it might be worth splashing race gas in it until you know you have it turned down low enough for av gas.

 

[Vertical-Extreme]

All good advice. You should read as many threads as possible here on the turbo cat forum. Some are good , some are bad, but they will give you a better understanding of what you bought. Also try and get the builder to go out on a ride with you and show you the in's and outs of the kit

 

[cpatts2000]

I think you should call the manufacturer of the turbo kit, looks like a quantum velocity, and have them send you a copy of the installation instructions. If you read through them and identify the parts you can start to understand what is going on. Maybe even their website has instructions you can download. I know that the first turbo I had I did the install and learned a ton. Just my .02

 

[Tonysnoo]

I would search through the threads about reading the O2 guage.....fuel pressure.......boost........rpm. They will be an important tuning aids for you.

There are many many posts on M8 turbos and their setups....and their problems. I would suggest grabbing your favorite beverage(s) and plan on sitting down for quite a few evenings and doing a ton of reading.

Go easy on the snow. You have a forgiving turbo sled but resist the need for speed for a while.

Good luck!

 

[av8er]

go to www.boondockers.com and download the install instructions

read them cover to cover while sitting in front of your sled and identify the parts while u look at the sled, all the while reading the instructions it will school u on what you don't know

 

[Johnmaster]

Good for you for stepping out of your comfort zone and buying a turbo sled, I am the first of my group to do it, it was kind of daunting at first so I know where you are at. Once you get familiar with your sled you will know it inside and out. There is a wealth of information in this forum, read as much as you can get your hands on but take it with a grain of salt. I don't think I would have had the courage to go for it without all the info I learned from the members here, great advice and opinions. Best of luck, hope you can get it out and have some fun with it.

 

[Mike89]

Thanks for all the info guys, I've been learning a lot the last 24 hours

Installed is a 7 lb actuator and the dial is open pretty much all the way. I will have to see if i can get a actuator that get be used with less boost and check the spring in the tial blow off.

 

[Mike89]

Is this the rod i should lengthen a bit for a bit less boost? Why would the spring need to change in the blow off?

 

[maniac mechanic]

Yes that is the rod you need to adjust, just make sure the arm still bottoms out and keeps the valve closed, if you set it so the valve is slightly open it will not spool up as good. The Blow off will not need any adjustment on that one, as it has the proper spring in it already. Some Blow off valves run a very heavy spring, and will not open under low boost operation, thus not work. This setup has a soft enough spring to open slightly even at an idle, that way it will open just off boost quickly. with this spring, you will be good for any boost that you can run with just the stock injectors and fuel pump.

Jeff

 

[Mike89]

ok thanks jeff,

Just to let anyone on the forum know, Jeff gives amazing service and stands behind his product. Glad the sled I bought had his turbo on it.

 

[scaredycat]

good advice all around

my thoughts

his adjustability is pretty limited anyhow as hes only running a single port vacuum pot with a cheater hose to his wastegate controller....dual port is better if you want more adjustability and external is the bomb if you want to weld - pin the internal and do some exhaust fab work

more money..more money

oops wait...maybe dont listen...too much info...lol