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Q&A regarding engines, turbos, and intercoolers and power upgrades
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It is necessary to mount arp screws to increase boost

Sat Apr 22, 2017 9:34 pm

Do you need to mount ARP screws to increase the boost of a Gen 2 or is it not absolutely necessary?

You have to increase the diameter of the block to mount the arp screws? Are they wider than the originals?

Thancks
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Re: It is necessary to mount arp screws to increase boost

Sat Apr 22, 2017 10:19 pm

Do you mean ARP head studs?

The factory head gasket on the 2nd gen 3sgte is composite and not metal like the 3rd gen, so with age, a large increase in boost can cause it to fail. I don't think installing ARP head bolts alone will decrease the risk.

If you want to make a difference, I would personally take the cylinder head to a machine shop and have them deck it flat if required. Then reinstall with a metal head gasket and ARP studs.

ARP head studs for the 3sgte are plug and play (no block mods required)

If you don't change anything, I wouldn't risk increasing the boost much more than 10 psi, but there are lots of discussions on this forum regarding this topic.
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