Required fuel for oversized pistons?
#1
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
93 1.6, Wiseco Pistons, Eagle Rods, MS DIYPNP.
I have just had my bottom end built with oversized pistons (K554M785 Bore:78.50mm (+0.020 Bore) Compression Ratio: 8.5:1) and Eagle Rods.
As the cylinders have been re-bored will I need to change the required fuel in MS? I would imagine several on here have used the above set up so if I do need to change the req fuel I would be grateful if someone could tell me what it should be as I have no idea how to work it out![Dunno](https://www.miataturbo.net/images/smilies/dunno.gif)
Barry
I have just had my bottom end built with oversized pistons (K554M785 Bore:78.50mm (+0.020 Bore) Compression Ratio: 8.5:1) and Eagle Rods.
As the cylinders have been re-bored will I need to change the required fuel in MS? I would imagine several on here have used the above set up so if I do need to change the req fuel I would be grateful if someone could tell me what it should be as I have no idea how to work it out
![Dunno](https://www.miataturbo.net/images/smilies/dunno.gif)
Barry
#3
Boost Pope
![](/mt2011/images_td/ranks/supporter1.gif)
![](/mt2011/images_td/ranks/smod.png)
iTrader: (8)
Join Date: Sep 2005
Location: Chicago. (The less-murder part.)
Posts: 33,339
Total Cats: 6,793
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
The stock displacement is 1,598cc, with a bore of 78mm
With your 78.5mm pistons, the displacement is now 1,618cc, an increase of 1%.
So either:
A: multiply your Req_Fuel value by 1.01, or
B: Forget about it. This is a trivial change.
With your 78.5mm pistons, the displacement is now 1,618cc, an increase of 1%.
So either:
A: multiply your Req_Fuel value by 1.01, or
B: Forget about it. This is a trivial change.
Thread
Thread Starter
Forum
Replies
Last Post
stoves
Suspension, Brakes, Drivetrain
5
04-21-2016 03:00 PM