Supernatural LT1s

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Arctic91
Posts: 69
Joined: Sat Jun 18, 2016 4:23 pm

Supernatural LT1s

Post by Arctic91 » Fri Nov 08, 2019 12:07 am

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
Scott
89 CTTC #027 (Black/Black Aerobody Coupe)
90 ZR-1 #2547 (Turquoise Metallic/Black)
92 SNAT 400 (Polo Green/Beige Convertible)
95 SNAT 450 (Black/Black Aerobody Coupe)
91 ZR-1 #1231 (Arctic White/Saddle) - SOLD

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BIGJOHN
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Location: Ledyard, CT.

Re: Supernatural LT1s

Post by BIGJOHN » 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

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Arctic91
Posts: 69
Joined: Sat Jun 18, 2016 4:23 pm

Re: Supernatural LT1s

Post by Arctic91 » Sat Nov 09, 2019 12:19 am

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
Scott
89 CTTC #027 (Black/Black Aerobody Coupe)
90 ZR-1 #2547 (Turquoise Metallic/Black)
92 SNAT 400 (Polo Green/Beige Convertible)
95 SNAT 450 (Black/Black Aerobody Coupe)
91 ZR-1 #1231 (Arctic White/Saddle) - SOLD

PretendHero
Posts: 4
Joined: Mon Aug 26, 2019 11:02 pm

Re: Supernatural LT1s

Post by PretendHero » Mon Nov 18, 2019 10:27 pm

Not sure this is what you are looking for, but hopefully it helps.
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Arctic91
Posts: 69
Joined: Sat Jun 18, 2016 4:23 pm

Re: Supernatural LT1s

Post by Arctic91 » Tue Nov 19, 2019 12:48 am

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
Scott
89 CTTC #027 (Black/Black Aerobody Coupe)
90 ZR-1 #2547 (Turquoise Metallic/Black)
92 SNAT 400 (Polo Green/Beige Convertible)
95 SNAT 450 (Black/Black Aerobody Coupe)
91 ZR-1 #1231 (Arctic White/Saddle) - SOLD

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