do i need to tune this?

**98regal** · 04-12-2012

I have a 98 regal GS sc 3800 bought it with a blown motor bought a na 3800 and top swaped the na 3800 used the sc motor fuel rails injectors and all nessecary top swap procedures do i need to tune my pcm being it was already tuned to run a sc 3800 all pros and cons appreciated thanks guys

**Scottydoggs** · 04-12-2012

yes, you are now running a high compression block.

**Austins01GP** · 04-12-2012

i would either way tunes are great

**Tuner-Extraordinaire** · 04-12-2012

Originally Posted by 98regal

I have a 98 regal GS sc 3800 bought it with a blown motor bought a na 3800 and top swaped the na 3800 used the sc motor fuel rails injectors and all nessecary top swap procedures do i need to tune my pcm being it was already tuned to run a sc 3800 all pros and cons appreciated thanks guys

Definitely.

Or get a larger pulley.

**98regal** · 04-12-2012

it has a stock pulley and all stock airbox no mods to engine and im not sure where around me does tuning

**Tuner-Extraordinaire** · 04-12-2012

headers, rockers at least then since high compression.

**Swiggles** · 04-12-2012

if you get a 4.0 pulley youll be safe until you get a tune. you should be monitoring your knock too. you definitely need to tune it though. stay off the throttle until you do.

**darkhorizon** · 04-12-2012

asking for alot of trouble here... I wouldnt worry about getting it tuned as much as I would worry about getting some boost taken out of it... or something like an intercooler or headers installed.