What compression ratio should I be running on a turbo bug

[advinnie]

Yes it definitely has .36 stamped on the hot side and .46 on the cold. It’s a airesearch turbo

[buguy]

Well that should work pretty well then. Mine is a 42/48 and its a bit too big.

[advinnie]

Just thought when I was running the turbo cylinder three was only producing 50 psi on a compression check so only three cylinders where powering the turbo all of the exhaust gases from number 3 cylinder was coming out of the crankcase breather

[buguy]

When I first built mine, when I put my heater boxes on the forward cylinders I was too far up and only had one bolt in it. It was blowing all of it out to the atmosphere! I was sad when it wouldn't build boost! worked a bit better once I put the exhaust on!

[advinnie]

Well new pistons are here and have just finished putting them on heads should be with me early next week so I will get them cc’ed and see what compression ratios I will get them grid the barrels into the heads so hopefully the engine will be done by xmas and in the car by new year

[buguy]

Nice! You move faster than me!

[madmike]

Do it a favor and 'Balance them Pistons'

[advinnie]

All ready done mate

[advinnie]

Is this port for meth/water injection nozzle?
If not what is it for

[madmike]

Hell if I know ?
Don't know where Art placed his?
Got any Distrucktions for the W.I. Kit?

[Clonebug]

Water Injection is not usually used in a draw through turbo system. The fuel being pulled through the Venturi on the carb achieves somewhat the same thing.
In order to run W/I on a draw through you would want to spray it after the turbo.You would then need a solenoid that can stay shut in vacuum to keep the engine from pulling water out in normal cruise conditions. That is about 10-20 lbs of vacuum on my boost/vac gauge when driving off boost or coasting off throttle.
Therefore you need to design the system to work that way. I have one nozzle below the throttle plate and one above the throttle plate. one kicks on at 5 lbs and the second kicks on a 9 lbs.

The problem with a draw through is you don't know what your IAT's are under boost so you would be guessing how much water to inject.
I watch my IAT's and use the calculators online to set my injection amount.
I am at 3.0 gph at 22 lbs boost according to nozzle size.

It will cost between $200.00 and $450.00 to get a correct WI system depending if you build it yourself or buy a complete system.

I recommend a 300 psi pump from "Devil's Own" and their nozzles and then build the rest yourself. You can get the pushloc 1/4 inch fittings from a local Hydraulics Store or maybe Hardware Store and use the 1/4 inch clear plastic line too.
I used an old lawnmower tank as my water storage....it was free.......

[advinnie]

Cheers mate. I think what I have to do first is see what my intake air temperatures are. Anyone got any photos of how they have fitted there air intake temperature sensors ?

[Clonebug]

Usually the only way you can get your IAT's is if you have EFI with all the cool logging capabilities.......another great reason to upgrade......

PLX has a Intake temp sensor and if you had their O2 sensor with multigauge it would be a simple add on and you could read it right on the gauge.

I have their AFR O2 and the EGT gauge outputting into my multigauge.

http://www.plxdevices.com/Wideband-O2-T ... 002719.htm

IAT sensor.

http://www.plxdevices.com/Air-Intake-Te ... 002214.htm

With that style of sensor it might read too slow for boosted applications but it does state for intercoolers and aftercoolers.

My sensor is a GM intake sensor with an open end and is very fast reacting. It displays on my TunerStudio and I can also log it along with any other data I desire. So far it has worked even with my WI spraying water/Alcohol on it so I guess it could handle fuel too.

[advinnie]

Cheers mate

[buguy]

Where would you take your readings at on a drawthrough? Surely the intake itself would be cold as hell!
Maybe down wind of the turbo?