In a word, the porting numbers @ .350 are absolutly horrible on a 1UZ, are the 3uz any better?! I mean yes, In a forced induction your forcing the air through and even the most horrible heads can flow, but. I see the restriction causing huge back pressure, now maybe this is because there isn't an oversize valve/more agressive cam profile, however, the stock lift, and stock head flow numbers, are absolutly awful.
Anyone have a billett head, or know of any other heads we can retrofit, because coming from the 2j, that head design being a G design was bad enough. The F design of theese motors, what the hell is going on here, the 1U is a bad ass little motor, but the heads, my god are they awful. Anyone know what guys are doing over 1400+ hp? If we could only retrofit a set of ford mod heads to theese motors
then we'd be set, but 124cfm at .300 is a joke!
What are the top drag guys doing, billett heads? F that, there's no need to cutt out the cooling, what about welding up the heads and recutting? Is there anything we can do to get the head flow up around 250-300cfm without praying to a higher power or spending a massive amount of money reengineering?
I mean it's all relative, I can just pump more boost into the motor, but the beauty of bigger displacement is...so we dont have to do that to make power, but now I'm seeing the bottleneck here is the heads, the bottom end I know will hold 2000...top end on the other hand is a major restriction.
So what do we have?
Anyone have a billett head, or know of any other heads we can retrofit, because coming from the 2j, that head design being a G design was bad enough. The F design of theese motors, what the hell is going on here, the 1U is a bad ass little motor, but the heads, my god are they awful. Anyone know what guys are doing over 1400+ hp? If we could only retrofit a set of ford mod heads to theese motors
![Wink ;) ;)](https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f609.png)
What are the top drag guys doing, billett heads? F that, there's no need to cutt out the cooling, what about welding up the heads and recutting? Is there anything we can do to get the head flow up around 250-300cfm without praying to a higher power or spending a massive amount of money reengineering?
I mean it's all relative, I can just pump more boost into the motor, but the beauty of bigger displacement is...so we dont have to do that to make power, but now I'm seeing the bottleneck here is the heads, the bottom end I know will hold 2000...top end on the other hand is a major restriction.
So what do we have?