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 305 TBI Upgrades 
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Joined: Mon Jul 29, 2019 3:05 pm
Posts: 1
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Post 305 TBI Upgrades
Yes I know its archaic technology.

I own a 91 RS convertible with the 305 TBI motor. I would like more horsepower but I am not ready to commit to a full driveline swap at this time.
The car is used far more for day trips and cruising so I am not looking to create a street stormer.

My question is simple.

What modifications would you recommend? I would put a preference on something that could be repurposed in an engine swap.
My thought would be investing in new headers and exhaust.

The engine is relatively unmolested at this point, I have only replaced the air intake with a dual snorkel from the older 5L HO carburated, which required a spacer.

I have enough mechanical aptitude to be dangerous but enough common sense to know what is beyond my capabilites.


Mon Jul 29, 2019 9:25 pm
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Joined: Wed Sep 03, 2014 8:59 pm
Posts: 303
Location: Barrie
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Post Re: 305 TBI Upgrades
Headers and exhaust are always a good place to start!

Have you had a look at the RPO sticker on the car? Curious what rear gear is in the car.....a lot of the 305 TBI cars had something terrible in them like a 2.73. Swapping to a something like a 3.23 would definitely give it a little more pep in its step.

Tue Jul 30, 2019 6:39 am
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