Questions on my 4age??

[KameleonK]

ok so i have a Frankenstein 4age not sure exactly wat i have but would like to know....my question is how can i tell which one i have without having to take it apart....i have no problem takin it apart its just i wont be able till next month.....this is my daily driver so i kinda need to know wat am runnin....also need to know so i can gap my spark plugs right.....is their anythin really wrong wit gapin them wrong??? cuz i know if its a smallport head i have to gap them .032 and if its a bigport i have to gap them .043 so kinda dont want to have wrong gapping cuz i dont know what the consequences may be.....i have looked up but i cant say i have gotten an answer so i decided to post...

[vinny of destruction]

The easiest way to tell is .. Does it have TVIS intake? Does it have AFM or Map sensor? How many ribs are on the block 3 or 7?

[jondee86]

Smallport head has an external oil drain at the rear of the head on the
inlet side. A short hose that plugs into a hole on the block. Hard to miss

Cheers... jondee86

[KameleonK]

does not have tvis....AFM is their....dont know how many ribs i got since i havent opened thats y i was askin to see if their was another way lol

will check to see if the if the hose is their.....

[vinny of destruction]

No on the outside of the block under the intake you should see either 3 or 7 ribs/fins going up the side
like this
I stole this pic from Banpei Its a 7 rib


The large port intake will have 8 intake runners going to the head while the small port only has 4
Large port (blue top)

Heres the top view of a red top (small port)

[KameleonK]

ok kool thanks guys i finally found out wat am runnin....

running a 7 rib wit a big port no tvis

[Uzelac]

And what you have on intake ?

[banpei]

A bunch of carbs?

[KameleonK]

well it dont say tvis on it so not really sure asumin i dont have any lol its a stock manifold lol wat more can i say i thought their were no tvis manifold and tvis manifold.....

[robokill]

don't assume your crank. because the 7 ribbed lower block was first with a 40 mm crank with 18 mm pin. Compared to the late version 4age with 42 mm crank and 20 mm piston pin.