Early tvis red top from e9 gti small or bigport?
04-19-2018, 10:29 PM
Post: #1
Early tvis red top from e9 gti small or bigport?
Hello,
Its been a while i was here i have a question as says subject i have from my dismantled e9 gti red top 4age engine i have trouble to understand if it is bigport or smallport if it got tvis the block is 7rib. Some local guy want head and intake if it is small port. Another option i have to use it for my spare engine which is 7rib block with blue top head but i am not sure if it can be fitted. The block on the e9 was having damaged piston bearings i am not sure if it is worth rebuilding it i will be as well not able to use the intake as it is reversed i think. In future i plan to swap the spare engine to my coupe as the old engine is getting tired as i feel it. The spare was running really strong as i remember in my first coupe but was taken out as the chassis was over rusted and not worth saving. Any ideas what will be the best for me? Thank you.

85' AE86 GT coupe lifetime project since 2005
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04-20-2018, 12:04 AM (This post was last modified: 04-20-2018 06:52 AM by jondee86.)
Post: #2
Early tvis red top from e9 gti small or bigport?
When looking at the intake ports, the bigport has the ports arranged
in two pairs with more space between 2 and 3 than between 1 and 2
or 3 and 4. The smallport has four equally spaced ports, and it also has
an external oil drain at the rear of the head on the intake side. The
bigport does not have this drain.

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04-20-2018, 08:57 AM
Post: #3
Early tvis red top from e9 gti small or bigport?
Top head ist smallport bottom is bigport Wink

[Image: AEU86 AE86 - Early tvis red top from e9 ...r bigport?]

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04-20-2018, 09:14 AM
Post: #4
Early tvis red top from e9 gti small or bigport?
If the engine has a TVIS intake, it's a bigport. In AE92's this would have black and red lettering (black "twincam", red "16 valve").
Smallport has no TVIS, and a different spark plug cover, has all red lettering on one cam cover (red "twincam 16 valve")

'84 Corolla AE86 GT coupe......daily driver
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'81 poor guy with a money-pit


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