Big Port Or Small Port ??

[dougyboy]

hey me again i wont to know if i have a big port or small port motor?? as i wont to order a loom to sute the motor.just wont to make sure its right sorry i am a noob with the toyotas il post some pics cheers.

[carbonboy]

JFC....

 

With painted cam covers, that takes the first indicator out (colour of writing), no TVIS plate & can't see any of the plate that goes between the block & intake manifold, both bigports (later versions) & smallports had 7-rib blocks.... Could even be a mix 'n match of manifold/block/head, unless it's history is known how do you know what it is?

 

:hmm:

 

Short of yanking the head off & measuring the valve size, I have nothing. :(

Edited November 25, 2011 by carbonboy

[_FNQ_rolla_]

I agree with “Carbonboy” its too hard just looking at a picture to tell.

 

Are you asking what sensors do I have so I can get the correct wiring harness to suit the motor you have;

A) does it have an Air Flow Meter (a sensor just after the air cleaner)

B) does it have an MAP sensor (a sensor that has a vacuum hose to the intake manifold)

 

Or are you asking what head, the easiest way I could think of is to remove the inlet manifold and take a picture of the inlet port sizes.

 

The below pictures are taken from Bill Sherwoods 4AGE page

 

 

4AGE Big Port Above

 

 

4AGE Small Port Above

 

BTW,,,,, its not too hard to run spell check

Edited November 25, 2011 by _FNQ_rolla_

[dougyboy]

JFC....

 

With painted cam covers, that takes the first indicator out (colour of writing), no TVIS plate & can't see any of the plate that goes between the block & intake manifold, both bigports (later versions) & smallports had 7-rib blocks.... Could even be a mix 'n match of manifold/block/head, unless it's history is known how do you know what it is?

 

:hmm:

 

Short of yanking the head off & measuring the valve size, I have nothing. :(

 

dam well i got te car like this so its all new to me i have a loom in my ebay for a small port rolla frunt wheel drive car i wont to get the loom so i can fit it up on the motor in my ae71.

the covers came like that i will be sanding them back soon

sucks big time thanks for the help info but yeah still lost

[dougyboy]

I agree with “Carbonboy” its too hard just looking at a picture to tell.

 

Are you asking what sensors do I have so I can get the correct wiring harness to suit the motor you have;

A) does it have an Air Flow Meter (a sensor just after the air cleaner)

B) does it have an MAP sensor (a sensor that has a vacuum hose to the intake manifold)

 

Or are you asking what head, the easiest way I could think of is to remove the inlet manifold and take a picture of the inlet port sizes.

 

The below pictures are taken from Bill Sherwoods 4AGE page

 

 

4AGE Big Port Above

 

 

4AGE Big Port Above

 

BTW,,,,, its not too hard to run spell check

ok thanks it dus not have a air flow meter but it had a haltech in it,the loom is cut up to shit missing plugs its a mess.

so il take the manifold off and post pics tomorrow somtime thanks for the help.

 

allso i do yous spell check with every post as I'm not all that good at my spelling and gramer so sorry this is the best i can do.

[_FNQ_rolla_]

Before you do anything, what are you trying to do figure out?

 

1) what loom do you need to get this motor working or

2) what head do I have on the motor

[dougyboy]

what loom i need to get this motor running mate i have one on my ebay its for a small port.

 

this is the link you think i can get it to work?

http://my.ebay.com.au/ws/eBayISAPI.dll?MyEbay&gbh=1 thanks for you help relly!

[dougyboy]

wow I'm a tool! this is the link man i feel silly!

 

http://www.ebay.com.au/itm/280778944078?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649

[Hiro Protagonist]

Looks to me like a bigport, at least as far as the intake plenum (which has been cut and shut though for RWD though) and cam covers are concerned. The small rectangular section on the plenum is where the TVIS label normally goes (smallports have a plain ribbed plenum with no markings), and the cam covers only have one level of bolt holes for the spark plug valley cover which also means bigport (smallport have two levels). As has been said though, cam covers can be swapped over easily and the plenum could be a red herring too because of the RWD conversion.

Edited November 25, 2011 by Hiro Protagonist

[altezzaclub]

Have you got the workshop manual for the AE86??

 

Its on the web somewhere, I d'loaded a copy ages back and printed it. That will have wiring diagramns and engine info in it.

[timgte]

Its a bigport. Has a bigport manifold fitted. Smallport manifolds look completely different and they are not interchangable. I have had both types in the past.

[dougyboy]

thaks so much for your help everyone i do aprichate it alot so I'm pretty sure i have a big port motor il look into the wiring to see if i have the same sencers on the head cheers will get back to yous

[dougyboy]

i have a map sencer on the fire wall so I'm relly sure its a big port. thanks peeps

[Hiro Protagonist]

i have a map sencer on the fire wall so I'm relly sure its a big port. thanks peeps

 

In Aus both the bigport and smallport were MAP-sensored...

[dougyboy]

Ok well all i can do it get a loom and try it i spose