4AGE cam talk.

[Jebus]

Was breifly discussed in another thread but would like to know more.

Mr Revhead says there are two types of camshafts for 16V 4AGE's.

One of them being 240 degree, the other being 232 degree.

Bluetop TVIS = 240
Red Top TVIS = 232
Red Top SmallPort = 232
GZE = 232

Why did toyota give the red top tvis the big port head, and then give it the cam shaft with the lower duration? Doesnt that just seem daft going against the flow characterists and head design, when the blue top seemed fine with the bigger cams, they made the red top TVIS extra crap with smaller cams.

What gain roughly can be had from using the 240 camshafts in a motor that originally had 232 camshafts? Probaly only a few horsies but it all adds up.

And with cam timing settings, does anyone know any that differ from these on Club4ag

For more bottom end power retard the exhaust 4° and advance the intake 3°. For more top end, advance intake 4°and exhaust 3° from stock settings.

Cheers

[NA Drifter]

you will also find not only duration is reduced, but also lift.. from like 7.4mm? to 7.1mm .. somthing like that..
It make me wonder for a while too, but I think they did it because of the smallport doesn't have T-VIS and to make it still "driveable", they reduce the cam profile so the car can idle properly, and have good low end town driving capability etc?
Also probably that's why redtop t-vis motor is the worst one out of all?

[ants_ae92]

Bluetop TVIS = 240
Red Top TVIS = 232
Red Top SmallPort = 232
GZE = 232
Cheers

red top tvis with 232 degrees?

I am pretty sure any big port has 240deg cams?

[CozmoNz]

if such the case, why do all the ze boys, swap their cams for blue top, and not redtop?

[ants_ae92]

Then why with the same port size, intake manifld etc, does it make less power but at the same rpm as the blue top?

If every thing is the same except the larger internals, if they used smaller duration shouldnt it make power at a lower rpm?

Possibly also because there are lots of blue tops????

[vvega]

Then why with the same port size, intake manifld etc, does it make less power but at the same rpm as the blue top?

If every thing is the same except the larger internals, if they used smaller duration shouldnt it make power at a lower rpm?

Possibly also because there are lots of blue tops????

to me this makes no sence ??

v

[Silent Knight]

Then why with the same port size, intake manifld etc, does it make less power but at the same rpm as the blue top?

If every thing is the same except the larger internals, if they used smaller duration shouldnt it make power at a lower rpm?

Possibly also because there are lots of blue tops????

to me this makes no sence ??

v

n00b obviously he said that there's more blue tops so it MUST mean that they make better power at low RPM.

[Punter]

n00b obviously he said that there's more blue tops so it MUST mean that they make better power at low RPM.

Ahhhh power in numbers......

[JamesM]

lol.. does anyone keep on topic?

[Jebus]

hmm, i agree with antz. Im trying to figure out why they would give the red top TVIS the smaller cams, when the head is the exact same as a blue top (which has the larger cams)

Can anyone confirm what Mr Revhead said?

[crnkin]

from what i understand what you said in the first post is right

I had a redtop tvis and the cams were defs different to bluetop. BTW anyone got some blue top cams

[Jebus]

I do

However are destined for my red top

[ChaosAD]

The search button is your friend.
http://forums.toyspeed.org.nz/viewtopic.php?t=34727&highlight=bluetop

[AE85coupe]

so does anyone know how much gain there is in using bluetop cams in a red top?

[Bazda]

I put bluetop cams into my 4agte, very minimal gain but every bit helps.

[EVLGTZ]

I put bluetop cams into my 4agte, very minimal gain but every bit helps.

indeed it does, worth doing if ya got the time and a spare set of blueys

[wanado13's]

I have a set of blue tops I'm going to put in my ae92 gtz when I do my cambelt in the next couple of months. Although Bazda and evilgtz had no problems with just chuckin them in i've been told by a few people you have to check some things first. If anyone has done this check and knows what you have to measure and what the measurements need to be could they please put them up?

[Bazda]

check ur valve clearances.
cant remember off by hart what they, somewhere around 0.2m-0.3mm

[blackie]

if such the case, why do all the ze boys, swap their cams for blue top, and not redtop?

... because as stated above, bluetops are 240deg vs 232 for red..

[Jebus]

Thats exactly what he was getting at