Sean is reaming out my stock intake manifold and I am going to cut the pinched neck off and have a pipe and throttle plate welded on. After modification, the stock plenum should be close to 2 liters.

So.

What size throttle body should I get? Choices are 60,70,80,90mm. Will be running 20-30psi.

I make 108,920 horsepower and this is my engine.

 

WTF is this bastard for?!?!??!

 

Good 'ol Wartsila engines. Can't live with them. Can't beat the **** out of their absolutely incompetent sales staff.

 

Whatever size you want, since you'll quickly discover that 2 liters is too small and the stock runners are garbage anyway.

Or you can graft a B18 manifold onto the motor and run a 65-70mm TB, or try a 90mm Q45 TB. The larger the throttle body, the better the flow (to a point) and the worse the low-speed driveability is.

 

OK Mr Wet Blanket do you really think the aftermarket honda IM plenums are really 3 liters?

 

Wouldn't the low-speed problem be (partially) fixed by using a progressive throttle linkage?

 

Q45 if the rest of your car is man enough to justify it.

 

??? My motor above is a diesel motor and is not carbed.

How was low speed driveability for you Jay? Did you notice a change after going from your stock IM/TB to the flipside/q45?

Unlike when my car was stock, about 90% of my driving is not at WOT. Stock I think I was indeed at WOT 90% of the time.

 

Do you really think that a stock BP mani flows half as well as any aftermarket b18 mani, much less a nice edelbrock mani?

 

With a progressive linkage on the Q45 the drive-ability was equal to the stock throttle body. I'm a big fan of an aftermarket IM/TB combo, I would recommend staying far away from anything made by Flipside Customs. I personally think you're wasting your time with the oem manifold regardless of which throttle body is on it. Stop trying to polish turds.

 

I run a Ford 70MM 5.0 TB with no issues and low speed, I had to use a helper spring though I mounted on my plenum because the throttle spring was too weak.