Question about 351 head swap

[JKady]

Did you do the lower as well? That's where the power is in porting those manifolds.

 

[white95]

That intake on even the most basic 351w is a major restriction.

 

[JKady]

That intake on even the most basic 351w is a major restriction.

He doesn't have it on a 351 though...

 

[3.8L_Aaron]

Did you do the lower as well? That's where the power is in porting those manifolds.

I haven't yet, pulling it, and the heads today, going to clean them all up and port-match them all to the upper plenum

 

[JKady]

I haven't yet, pulling it, and the heads today, going to clean them all up and port-match them all to the upper plenum

If you don't open the whole port up I wouldn't take the time to pull it, gain is negligible at best without real port work.

 

[3.8L_Aaron]

If you don't open the whole port up I wouldn't take the time to pull it, gain is negligible at best without real port work.

I'm using the whole port. I'll e doing a 7 angle on them as well eventually.

 

[JKady]

I'm using the whole port. I'll e doing a 7 angle on them as well eventually.

I was talking about the intake, I misread your post and it sounded like you were just port matching the lower and leaving the rest.

 

[87hurricane]

So maybe it's just me, but porting a stock throttle body seems like a waste of time since you can't make the butterfly bigger.

 

[BLWNBYU]

So maybe it's just me, but porting a stock throttle body seems like a waste of time since you can't make the butterfly bigger.

Just......stop

Sent from my SM-G900V using Tapatalk

 

[rz5.0]

So maybe it's just me, but porting a stock throttle body seems like a waste of time since you can't make the butterfly bigger.

It's usually port match with the intake..