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Supernatural LT1s

Posted: Fri Nov 08, 2019 12:07 am
by Arctic91
Does anyone happen to know what accounted for the hp/torque gains over the years with the LT1-based Supernatural motors? Started with 400 and eventually peaked at 450, from what I can tell.

Were the same internal components used over the course of the run or were changes adopted over time? Any changes to exhaust? Was the tuning further refined and some increased performance unlocked that way?

I was asked what was different between a SNAT 400 and a SNAT 450 that gave the latter an extra 50 horses, and really didn't have a solid answer.

Thanks,
Scott
:beer

Re: Supernatural LT1s

Posted: Fri Nov 08, 2019 11:29 am
by BIGJOHN
The difference on mine changing from 400 to 450 was LT4 intake, different head Porting, Roller Rockers, headers And tune.

:beer

Re: Supernatural LT1s

Posted: Sat Nov 09, 2019 12:19 am
by Arctic91
BIGJOHN wrote: Fri Nov 08, 2019 11:29 am The difference on mine changing from 400 to 450 was LT4 intake, different head Porting, Roller Rockers, headers And tune.

:beer
Thanks, mate. That's more detail than I've been able to discern about the differences following hours of online searching.

:thumbs
Scott

Re: Supernatural LT1s

Posted: Mon Nov 18, 2019 10:27 pm
by PretendHero
Not sure this is what you are looking for, but hopefully it helps.

Re: Supernatural LT1s

Posted: Tue Nov 19, 2019 12:48 am
by Arctic91
PretendHero wrote: Mon Nov 18, 2019 10:27 pm Not sure this is what you are looking for, but hopefully it helps.
Thanks. I appreciate the response, but am hoping to learn what changes were made to the LT1 builds between 1992-95 to differentiate a "Supernatural 450" from a "Supernatural 400". What changes were made to get the extra hp and torque? The LT5 was a different animal and I can understand the elevated numbers from that motor.

:beer
Scott