Slowest vs. the Fastest

[Footer]

Now I’m just assuming a R3 from the factory would be the fastest Avanti. Maybe a 300 hp 327 would be right there. What would be the slowest?  400 2 barrel or my 305? Hard to get real comparable horsepower numbers.  Mike

[mfg]

1 hour ago, Footer said:

Now I’m just assuming a R3 from the factory would be the fastest Avanti. Maybe a 300 hp 327 would be right there. What would be the slowest?  400 2 barrel or my 305? Hard to get real comparable horsepower numbers.  Mike

I’d definitely say your 305 CI Chevy would be slower than an R3 Avanti or an Avanti equipped with a 400 CI…with either a two barrel carb or four barrel,

[Stacey]

Agree, a 305 is a boat anchor as far as the power goes.  

[Dwight FitzSimons]

Weren't some 305 HO (high output) engines installed in Avanti IIs?  Those made decent power.  I once had an '84 Pontiac Trans Am with this engine (BW T-5 5-speed trans) and it was reasonably powerful for the time.

[mfg]

5 hours ago, Dwight FitzSimons said:

Weren't some 305 HO (high output) engines installed in Avanti IIs?  Those made decent power.  I once had an '84 Pontiac Trans Am with this engine (BW T-5 5-speed trans) and it was reasonably powerful for the time.

I think they had 35-30 extra HP… a quick visual for those is the dual snorkel air cleaner assy.