1991 chevy silverado 305 to 350 swap
08-28-2015, 09:55 PM
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1991 chevy silverado 305 to 350 swap
Hey I'm new to this so plz bare with me I just had a mechanic swap 305 to 350 didn't change any of those parts as described in the other post so my question is with chip or witch ecm should I switch to .....and another problem I am having is on take off around 20 to 30 Mph when I floor it it revs real high so I have to let off the gas or I feel like motor is gonna blow lol...any ideas on this any help will be appreciated
08-28-2015, 10:08 PM
#2
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Re: 1991 chevy silverado 305 to 350 swap
What car did you have, TBI, TPI?, carb?
What is on the new motor for induction?
What is on the new motor for induction?
08-28-2015, 10:29 PM
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08-28-2015, 11:00 PM
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Re: 1991 chevy silverado 305 to 350 swap
So you have the stock Chevy silverado induction system on the engine now?, Are you using the computer as well
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08-29-2015, 01:48 AM
#8
Re: 1991 chevy silverado 305 to 350 swap
You're saying your "mechanic" put in a 350 but didn't change any of the calibration items like injector sizing or ECM/prom? Your "mechanic" is an idiot. You're going to need the injectors and ECM/prom for a 350 in your vehicle at minimum. Be sure the calibration includes the transmission type you have and the appropriate gear ratio--an ECM/prom for 4.11 gears won't play well if you have 3.42s.
Trans not upshifting properly?
Trans works fine, you're not used to how it is supposed to sound?
No way to tell from here.
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