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replacing the connecting rods.

HardBaz

New member
Joined
Jan 27, 2025
tomorrow, I might get hands on a b230F with 86k miles (Factory) i plan on decking the head 2-3mm. I got a 16T turbo i want to swap in later this year, should i replace the connecting rods if i get that motor and will i need to polish the crank journal? or should i wait??

With the connecting rods out, can I still swap it in with the other pulleys and pumps still connected to the block? like powersteering AC alternator?

Ps. I plan on putting in H style connecting rods... with a boost range of 15-25 PSI if i get the turbo connected
 
That depends on what rods you have now. 13mm rods and a 16T will be fine.

Decking the head 2-3mm will put you in the 10.5:1-11:1 range, are you sure you want that for turbo?
 
Decking the head 2-3mm will put you in the 10.5:1-11:1 range, are you sure you want that for turbo?
what would be preferred for a turbo setup? not decking at all?? Also ill if its better as is, i have an extra head from my current motor that i can just toss in if i were to +t
 
what would be preferred for a turbo setup? not decking at all?? Also ill if its better as is, i have an extra head from my current motor that i can just toss in if i were to +t
B230FT is 8.3:1, B230F is 9.2:1 at best. I've ran 10.1:1 NA with A, V, and H with no issues, it didn't like the T with the stock timing map even with 93 octane. This was also with an optimal chamber shape to deter detonation. There's plenty of people running 9:1 and a TD04HL. The compression ratio you choose should be determined by the cam's volumetric efficiency and boost you want to run. A T cam and 16T would be very different from a KLR T3 and 16T.
 
yeah i was thinking of decking the head and getting a chip, but now idk. well when i put the turbo on. Oh im not sure if i mentioned it, but the motor has a ipd cam and cam gear.
previously i was thinking of getting an H or a K cam
 
Just to clarify, did you get a B230F or a B230FT?
Either way, people have +t'd NA engines forever without changing the compression.
If you already have a turbo engine, then it's gonna be fine with a 16T instead of the stock 13C.
It usually takes way more torque / power than that to bend stock rods.
 
Well then just do it in true tb fashion, put turbo on and turn up the boost until Kool Aid Man pays a visit, then turn it back a notch.

People have done it a million times without much additional work, there are so many threads on here about it.
 
Yea I have seen a lot of posts suggesting that, I might stick with 1 bar of boost

I might have the motor dropped off at my house from a friend… the guy over the phone made me think twice like j can’t haul the motor and trans 60 minutes away to my house
 
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