Boost?? Can not open here at work!

[Skydog]

What kind of boost on bone stock motor for short runs 500 feet runs or so. Will not let motor get heat soaked. On 112-115 octane 600 feet
I think it was like 18 psi or so?

Thank you Skydog

 

[tonykof]

According to the Boost calculator using Mike Knapps specs I get 22lbs @ sea level = 110.2 oct
tk

 

[Ted Jannetty]

What kind of boost on bone stock motor for short runs 500 feet runs or so. Will not let motor get heat soaked. On 112-115 octane 600 feet
I think it was like 18 psi or so?

Thank you Skydog

You still have to retorque the head but I run 22 psi on 116 motor octane and I pull timing with boost.

 

[Skydog]

Retorque the head? Does every one do this Ted? I just did the headgasket and bolts to your specs this summer?

THANK YOU !!!!

 

[Ted Jannetty]

Retorque the head? Does every one do this Ted? I just did the headgasket and bolts to your specs this summer?

THANK YOU !!!!

I didn't know if you were talkng about your sled specifically.

Anyone who Runs Boost should retorque the head especially above 7 psi.

 

[Skydog]

Right on buddy!!!!! THANK YOU !!!!!!!!!

 

[lakercr]

Right on buddy!!!!! THANK YOU !!!!!!!!!

Baby steps Matt. I wouldn't reccomend going out and doing your first pull at 18-20lbs. Take it up 1-2lbs at a time and see how everything behaves. Final RPM, a/f are both going to move around a bit as you bring up the boost. Don't tune too many things at one time either. Get a good baseline on your fuel curve for the boost you want to run, and then bring in the meth. You're going to be making some adjustments again once the injection is spraying.

As an example, I spent about 4 hours taking a customer's Apex up to 12 lbs from 7lbs, monitoring everything along the way. The more boost you throw at it the less forgiving a bad tune is going to be, and the motor isn't that forgiving to begin with...

 

[Skydog]

THANK YOU GUYS!!!!!

YOU guys and this SITE ROCKS!!!

 

[Skydog]

You guys think i should pull a few deg of timming out with a key?

Thank you Skydog

 

[mulot30th]

You guys think i should pull a few deg of timming out with a key?

Thank you Skydog

not really, but using a boost retard device.

 

[lakercr]

You guys think i should pull a few deg of timming out with a key?

Thank you Skydog

Heh, just buy the MSD already - you know you want to.

 

[Skydog]

ha ha i know!!!

 

[rxrider]

Skydog want boost - always more

Good advice on taking small steps.
I did follow that recommendation too going from 10 lbs and up to 16. First step was adjusting wastegate 3 turns up, net 1 lbs then I took her up 1 lbs at the time, doing multiple test runs at each lbs on the way.

Take your time buddy you'll get there

 

[wantboost]

when you guys are adjusting from say 10lbs to 16 what adjustments are needed?

 

[rxrider]

When the controller is installed turn the dial counterclockwise to make sure it will not add boost. First thing is testriding the sled. ON the lake, give the sled 3/4 throttle, watch the boost meter, if readings are within what you expect them to be, give it WOT and watch the boost meter carefully, at WOT it shall indicate the same amount of boost as before. This has to be done to verify the boost controller install. With the Dial fully closed air will go from the compressor to the wastegate bell freely and the controller is not altering the airflow, thus you have verified the installation to be correct.

Now start to turn the dial up 1/2 turn at the time. Do multiple testruns, most important is watching your boost pressure, next test run watch your AFRs. If everything is in check, turn the dial another half turn. You may not start to build more boost on the first few turns on the dial, nothing to worry about, just continue the routine. When your boost starts to rise, carefully watch your boost meter then watch your AFR meter. Continue until desired boost is reached.

Please allow your engine to cool between runs, do not run too many back to back runs in a row. Also, when going up in boost, run good racefuel when testriding, it's a cheap insurance if boost goes over the top or AFRs rise into the danger zone.

Remember, watching your boost meter is of the most importance, boost out of control will detonate an engine even run on racefuel if the motor is not prepared for the a certain boost level by having retarded ignition, lowered compression and so on.