Quote:
Originally Posted by sw20kosh
Yes it is not suited for high boost on pump gas. You adjust boost and ignition timing accordingly to keep knock at bay. If you are running a good safe tune there is no reason to avoid boost on this motor. A higher compressing motor will yield more power per psi so just keep your expectations realistic and run a safe tune / lower boost.
@ mkivsoopra 's and my turbo motors running at 6-7 psi (275 whp) hard at the tracks here are running strong. @ CSG Mike 's JRSC'd motor has been pushed harder than anyone's FI setup. @ ImperiousRex 's turbo motor has been pushed hard through time attack competitions and is holding up great. All of these people understand the concept of knock and how it destroys engines and so they run the appropriate tunes, psi levels and fuel octane to keep things safe for high performance duty.
For a street car on pump gas you need to keep expectations realistic of what the motor, with low octane, can do. If you just need to run 30 psi of boost and make 300+ whp on 91 octane safely then look elsewhere for a low CR motor. |
Yup, it's good to see these motors are being boosted and boosted properly. I myself am a commuter first and weekend warrior second. A high compression, low boost setup is ideal for me. I should have made my assertions clearer as to what amount of boost this engine can reasonably withstand and why the 12.5:1 compression ratio sucks for that sledgehammer, in-your-face type of boost most would associate with an all-out turbo rig.