bigport cams in smallport 4agze

**LO01UX** · 07-09-2009, 04:48 PM

Im guessing this has been asked many a times but I've searched and can't find anything...

Can 4age 16v bigport cams be put into a 4agze 16v (which I have been told all have smallport cams)??

If so is all I need to do is redo the valve clearances?

Also what other cheap and easy to do mods can u do on a gze?

**trdee** · 07-09-2009, 04:54 PM

yes u can swap them. best bang for buck would be a bigger crank pulley or smaller s/c pulley imo

**feral4mr2** · 07-09-2009, 11:00 PM

i agree, a pulley upgrade before you want to mess with the cams.

**LO01UX** · 09-09-2009, 12:49 PM

Your sig is so tru feralmr2

Yea I've got a smaller sc pulley from pulley bros coming I think its 103mm

I've just got the standard 16v sitting at home n wana use some of the parts like cams n throttle boddy

**feral4mr2** · 09-09-2009, 06:40 PM

be sure it's a early 3 rib 4age bigport, otherwise it wont have the 7.56 cams.

**fully seca** · 09-09-2009, 07:01 PM

hey there
i have the ae92 afm gze so do they have smallport cams not the bigport cam
coz an't they ar bigport

**trdee** · 09-09-2009, 07:15 PM

I beleive all gze's are supposed to have the 232deg 7.1mm lift "smallport" cams unless someone can prove otherwise

**LO01UX** · 09-09-2009, 07:38 PM

The 4age I've got at home have tvis (which I thought was on all bigports) and is out of a 87 model ae82

**Hiro** · 09-09-2009, 09:47 PM

Originally Posted by LO01UX

The 4age I've got at home have tvis (which I thought was on all bigports) and is out of a 87 model ae82

There are two bigport 4AGEs though, the 3-rib (originally had blue and black writing on the cam cover) and the 7-rib (red and black writing). It is only the 3-rib bigports that have the more aggressive cams, as well as smaller/lighter internals. Supposedly the last of the AE82s had the 7-rib, but quite a few have had engine changes by now so you can't always go by what was there stock.

**TERRA Operative** · 09-09-2009, 10:20 PM

My AE101 GZE had smallport cams. I installed bigport cams with HKS cam gears, was a direct replacement.
Just use a set of verniers to measure the cams to make sure they're the bigport cams.

**LO01UX** · 09-09-2009, 10:24 PM

Ok kool, was there any noticeable difference?

**TERRA Operative** · 09-09-2009, 10:28 PM

A little. Bit better midrange to top end, according to the bum dyno. Wasn't huge though (like a pulley).
I've played with the cam timing a bit too, so it's a bit different from stock now (and develops more boost due to less overlap. 10PSI on stock pulleys)