Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB
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Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB (https://www.ft86club.com/forums/index.php)
-   Engine, Exhaust, Transmission (https://www.ft86club.com/forums/forumdisplay.php?f=8)
-   -   The Ultimate FA20 ITB thread. (https://www.ft86club.com/forums/showthread.php?t=125122)

Tokay444 10-11-2020 10:29 PM
54mm should be the minimum.

Turdinator 10-11-2020 10:41 PM
Quote:
Originally Posted by Tokay444 (Post 3375070)
54mm should be the minimum.
Based on what? That sounds way too big to me. If you can make 270hp on 50mm ITBs on a 3SGE beams revving over 9k rpm what would make you think the FA20 (that cant even safely sustain revs to 8k) would need TBs that big?

Edit: After some googling I am guessing you are used to Hondas. FA20 =/= K20. FA20 is lower revving and doesn't have the Vtec big cam to deal with.

Tokay444 10-12-2020 12:15 PM
Based on wanting make any real gains.

PulsarBeeerz 10-12-2020 02:54 PM
Quote:
Originally Posted by Turdinator (Post 3375067)
It seems like they are using 4AGE 20v ITBs. The start of the thread lists the throttle sizes as 45mm for the Sard and 48mm for the Greddy. I would have thought the 48mms would be enough for this motor. Do we know which was used in for this dyno? The Sard does seem to have a greater volume plenum and shorter runners which I think would be preferable. Maybe a mix and match would net better results. I also know you can get 50mm TBs from people like Toda. So if its only the TB size that is restricting things there are ways around that if you are prepared to spend a little extra.

The first dyno used the Greddy 48mm ITBs and supplied plenum. The second dyno used the Sard ITBs and no plenum. SUR Fab a NZ company that makes some very nice CNC 50mm ITBs for the 3SGE as well. But IDk at least with the plenum installed you could get the same affect or better from the RacerX IM for >$900. Swapping out ITs easily doubles the cost..

x808drifter 10-12-2020 03:38 PM
Stock head flows 265cfm.
With the butterfly's so close to the actual valves honestly the sizes on both the kits are way too big.

Read:
https://racehead.com.au/designing-pe...-should-i-use/

Source of head flow
https://dsportmag.com/the-tech/educa...ylinder-heads/

Tokay444 10-12-2020 11:18 PM
Lol.

botbs 06-25-2022 05:12 PM
http://www.youtube.com/watch?v=4Q_7aoHgppE

cyde01 06-28-2022 04:36 AM
Quote:
Originally Posted by botbs (Post 3531111)
They needed a motec ecu to get it to work :(

Drifter X 06-28-2022 04:39 AM
Quote:
Originally Posted by cyde01 (Post 3531584)
They needed a motec ecu to get it to work :(

Yeah they removed the MAFS which the stock ECU needs, so they needed a standalone.


Sent from my iPhone using Tapatalk

blsfrs 06-28-2022 09:47 AM
I'd be curious to know how the ecu monitors intake air volume without a MAF or MAP. If not monitored it's almost like having multiple carburetors.

churchx 06-28-2022 11:21 AM
Just install 4 sensors :D

blsfrs 06-28-2022 01:47 PM
Quote:
Originally Posted by churchx (Post 3531642)
Just install 4 sensors :D
Easier said than done. (IMHO)

churchx 06-29-2022 12:32 AM
Obviously. Kind of trolled a bit :)

Teseo 06-29-2022 12:40 AM
Then you are at the territory of FI price wise


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