Originally Posted by
B18C5-EG
SR's are also Hydraulic lifters not solid.
So I was off by a little bit, still flows better. Also keep in mind 2UZ VVTI heads have a little better flow then 1UZ heads (not by much however). As far as the lift goes it's about the same actually, just not as much after market support, of course you can always have custom ground cams. How is an LS1 easier to work on? This is'int a drag strip and those cars get rebuilt after almost every race.
The only reason pushrod engines are still around is because their cheaper to manufacture. And your "drag strip" pushrod engines might see 2-3 races and run fantastic but then there getting torn down for a full rebuild, Formula 1 engines run an entire season before being sent back to be rebuilt, all running OHC setups kicking 12k for hours not 6-7 seconds. Pushrod engines have proven what they can do, i understand that, but i still believe OHC designs are far superior. Cobra V8 is 32v OHC and look at what it can do, stout as fuck and accepts a .650+ lift
How do you come up with it flowing better that looks
pretty well the same as the 204cfm my heads flow on the intake,
and 25 cfm LESS on the exhaust @ .300 lift, we dont even have to
look at the .500 lift numbers where that head still hasnt hit 225cfm
and my truck heads are at 250cfm, exhaust side being what 135 cfm vs 175
cfm.
The ONLY thing easier on the 1uz to "work on" your example of changing a
camshaft, which realistically, you think that removing four cams, all
of the caps holding them on, reinstalling the replacement cams
caps, timing all of them up, etc, let alone if you needed to change valve
springs is really going to take less time than an LS1 cam swap ?
Other than the cam example, everything else realistically will take less
time on an LS1, intake manifold, injectors, front accessory repairs (dont
know about the 1UZ offhand, but Q45, VG30, SR20 if you havent noticed
all still use individual belts and a bunch of brackets.)
Pushrod motors are still around because they can be just as powerful, and
very often put to shame, overhead cam motors, the LS1 just making a great
example of this.
If you want to see your prized 1UZ head flow really look bad, please feel
free to compare it to a stock L92 (truck) head....
Are you really talking about the cobra engine being impressive ? The one that takes a supercharger to make 390 HP ?
Please post up head flow numbers for that one next, I can see it now, it'll be down 20 cfm intake, and 40 cfm exhaust, and you'll still be saying it flows better.
