Boost gauge reading

[04mellowyellow]

I'm running a 2.75 upper pulley and I'm not sure what the lower pulley size is but the newly installed boost gauge is reading about 14 PSI and the temp outside was 54 degrees today. Vacuum was reading 18 while in park. Any suggestions on what the lower pulley size could be? I have no other mods beside a K&N drop in filter and a handheld programmer tune.

 

[Black00Bolt]

the easiest way to find out is crawl under there and measure it

 

[mcarbine]

Yeah just measure the outside diameter since thats the easiest and post it up and we will let you know. The 2.75 should be good for about 2 psi so my gues would be that you have a 4lb lower but like stated the only way to tell for sure is measure :thumbsup:

 

[04mellowyellow]

It looks like a LFP/JLP lower pulley. The measurement I'm getting is 9.25" and that was from outside to outside edge of the pulley.

 

[mcarbine]

Should be a 6#er

 

[04mellowyellow]

Should be a 6#er

You would think with the RR 2.75 upper pulley I would be pulling more boost. :shrug:

 

[Black00Bolt]

the stock airbox is probably holding you back from higher boost levels.when i had a 6# on mine with a 2.8 upper is was making 16psi but i also have an open airaid cai.