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Old 02-07-2023, 11:27 AM   #76
ShockingZ
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Drives: Chevy Camaro ZL1
Join Date: Feb 2023
Location: Floriduh
Posts: 121
Quote:
Originally Posted by clg82 View Post
That is truly what is confusing too me. But he is insistent that I would notice issues. Is my high side or my low side fuel pumps going bad already? He mentioned that adding a JMS is like boosting an 80W light bulb to 100W. Sure it will work but at what sacrifice for efficiency. Also mentioned he's always had issues with LT1-LT4 GM vehicles and adding boosters.
Whomever your tuner is, should be replaced. There are loads of guys using the JMS with the LT1/4. They work perfectly and you are only upping the voltage to the pump from 15 to 17.3v. Its no big deal but it makes a huge difference for the low side. Then when the low side is pushing well, the high side gets better as well as the injectors.

I'd seriously get a second opinion from another tuner. Call Ted and JRE he will set you straight with about 40 years of tuning experience.
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