| to run a little higher (psi) than without them. 0.035 should put you right about 15psi... Its just an empirical determination though.. Do what you need. As for boost spikes, yes - you will get it with boost jets. However, the spike with 0.035" jets will be small (perhaps 2psi). This is not as bad as it sounds though. You will note that when shifting to 3rd gear and going wot will cause the psi to hit maybe 16psi, then fall to 14psi through the RPM band. Same thing for 4th gear too, maybe a little more dramatic and hit 17, then fall. But these spikes actually happen below peak VE so the likelyhood of it detonating is very low. It actually is beneficial to a degree because you get that extra 0.5s of additional boost before it stabilizes. You will also note that as your RPM increases, your psi may fall off just a bit. This is normal behavior and actually helps to keep intake charge temps down (to avoid detonation)as RPM increases. As engine RPM increases, the turbos are spinning faster and faster to keep up with the increased demand of air(while maintaining pressure) so their efficiency starts falling off at higher RPM. This is also why you see stock turbo dynos where the torque curve looks very peaky. Stock turbos just peter out. =)
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