FS: 4age complete head, 4age head twin cam Options

[yungazzdriver]

hey you guys i have a complete twin cam 4age head with everything including head bolts and fwd intake manifold from an fx-16 well the head is in great condition with the vlave covers. well if you need some pics well write back or email me at yungazzdriver@netscape.net and name your price or..............I'd definately be willing to trade for a celica stock bumper or stock right fender please let me know.

[nik]

thanks for clearing that up bee now my question in a NA motor the small port is easier to make power up to 200 horse than the big port with like 11.0:1 pistons

[Kwanza26]

thanks for clearing that up bee now my question in a NA motor the small port is easier to make power up to 200 horse than the big port with like 11.0:1 pistons

Personally speaking... I like the smallport more... but in terms of possibly making power... they're basically the same thing. The MAJOR difference between the two is TVIS, but if you're looking to make 200+hp n/a... TVIS is gonna have to go anyways since it's gonna act as a mid-range hinderence (not to mention it'll be mostly useless at that power range). This is where the smallport has a slight advantage. The bigport's intake ports are a little bit too big to generate decent midrange velocity without TVIS... but with TVIS, running cams big enough to make 200hp... TVIS causes very noticeable power dips caused by vaccum lag in the actual butterfly system and by the sudden velocity loss (this has been noted many times before with 4AG and 3SGTE peoples and their dyno graphs at all sorts of power ranges). If we're talking the entire motors, as in smallport 4AG versus bigport 4AG... I'd go the the smallport every single time. Smallport is stronger (vsersus the early 40mm crank bigports), and the head is more tuner friendly because of the lack of TVIS. However... since we're talking 7AGE... it's a matter of prefrence. I personally would do smallport because it's more tuner friendly and if you want to go with bigger ports, you can always port out the smallport... meanwhile with the bigport... you're pretty much stuck.

To add a bit more... this head could have also come from a 1st gen MR2. Actually... more than likely... it did since Corolla FX16's are quite rare... and the layout of the intake manifold yells MR2.

This post has been edited by Kwanza26: Nov 22, 2005 - 1:03 AM