I have a 2.1 Kenne Bell just installed, up and running. With the stock pulley I'm making 11# and it's a blast to drive. With the underdrive I'm making 6#. My engine is completely stock so would 11# be safe if I'm not laying into it every 2 minutes?
Safe is a relative term . One guys safe isn’t another . Stock head gaskets ? Stock head bolts ? What’s the rest of the combo .
Your combo makes less with an underdrive because the smaller Crank pulley spins the blower slower.
You need to give the engine what it likes . Read the plugs for timing and fuel . Keep an eye on afr etc .
You’re asking about boost id love to know what the afr and timing is at ?
@a91what What ya think ?
Set it at ? That’s one thing . It needs to be pulling timing in boost . If it keeps adding the engine will not last longer then a few more times around the block .The engine is all stock. Head gaskets stock. I have shorties and full exhaust only. My cousin set the timing, I'll have to ask exactly what he set it at. And I still need to get an afr gauge. I've only driven it around the block.
Set it at ? That’s one thing . It needs to be pilling timing in boost . If it keeps adding the engine will not last longer then a few more times around the block .
i wouldn’t push it much further then 11 psi with everything bone stock