Quote:
Originally Posted by 2023_ZL1-AUTO
So my understanding for the 6th gen ZL1's and e85, is the limitation is the high side pump and can that not only be addressed via a CAM and not a voltage mod like JMS?
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The entire system is limited at some point. With absolutely no mods and just a flex sensor you can run between E60-70 depending on the elevation and target AFR. I still prefer at least a JMS booster to keep low side consistent. Once you do some bolt-ons the low side starts to fall off. Then after you address low side, you can run E50-60 with headers, cai, one size smaller upper pulley. If you port blower, then you need +30 injectors and LPE high side in order to run the same E content without touching the cam.
If you do cam then you can get to 750-760whp before the LT4 injectors are tapped on E60. So you still need +30's, then you can get to 820whp or so before the LT4 hpfp is maxed. So then you do LPE hpfp and can get to 900whp on E60 before injectors are tapped again. So now you need a real low side and +65's to go further.
Or go port injection and low side, the you can make 800+whp on full E without touching the DI system or cam.
With the current cost of DI fuel components, port injection is an attractive solution being you have a tuner that understands how to dial it in.