TBI Heads

[Aidan Kesler]

Anyone know the detailed specs of the TBI heads from 87-95. Combustion chamber cc, intake and exhaust runners cc, anything else that's useful would be great.

 

[PlayingWithTBI]

https://www.thirdgen.org/forums/tech-general-engine/495557-191-193-specs-comparison.html

FYI my 193 heads are sitting on the shelf and I bought these - flow better than Vortec heads too.
https://www.summitracing.com/parts/sum-162108/make/chevrolet

 

[Aidan Kesler]

https://www.thirdgen.org/forums/tech-general-engine/495557-191-193-specs-comparison.html

FYI my 193 heads are sitting on the shelf and I bought these - flow better than Vortec heads too.
https://www.summitracing.com/parts/sum-162108/make/chevrolet

I'm just wanting to know the specs of the stock TBI heads form those years.

 

[PlayingWithTBI]

I'm just wanting to know the specs of the stock TBI heads form those years.

The 1st link should tell you, HTH.

 

[Aidan Kesler]

The 1st link should tell you, HTH.

Oh, i didnt see it. Thanks

 

[884x4310ci]

64cc chamber 1.94 intake 1.50 exhaust. Is all I know off the top.

 

[Erik the Awful]

It's hard to find good data. I usually use OutintheShop's casting number listing, but it shows 193s as 58cc and 1.84/1.50 valves. The ones I have on my workbench right now are 1.94/1.60 and I believe 64cc, which lines up with the thread from thirdgen. My machinist said there are differences between the 305 and 350 TBI heads, but you'd think the casting numbers would narrow it down more. Ugh. If I get a burette any time soon, I'll post the cc.

 

[PlayingWithTBI]

IIRC @L31MaxExpress posted intake and exhaust runners some time ago but, I can't remember where - CRS

 

[884x4310ci]

The 305 heads have the 187 casting number. 350 has 191 193.

 

[badco]

Since everyone likes them i have 3 or more sets make offer and pay shipping