4AGE 16V valve weights

[nick.parker]

Hi,
I am looking for inlet and exhaust valve weights for 16V 4AGE. I dont want to take my head off to do this (I might die haha). I found some oversized aftermarket valves here :- http://www.importperformanceparts.ne...es-toyota.html

I emailed these guys and got the response that :-
They are dished,undercut and weigh 40grams E and 43I

I'm Interested to seen if I'd need stronger springs than stock to work them...hence asking about stock valve weights...

Cheers, Nick

Edit : I realise the valves arent a 'bolt on' modification!!!! and I will need new valve seats yada yada...

[nick.parker]

This would be some good info to add to Takai's thread here :
http://www.toymods.net/forums/showth...=4age+advanced

[-GT-]

*subscibes to thread*

Sorry, nothing useful to contribute, just looking to learn something from someone else's hard work...

[Ben Wilson]

I can get my hands on some spare valves if nobody else has any.

[kingmick]

If your going aftermarket valves, you might as well up the spring rate to suit what you will be doing with engine.
i only have complete heads, and i dont have the spring compressor here.

[nick.parker]

Hi,
Yep, intend on changing the springs as I just bought a 256deg, 8.35mm exh cam off ebay, which will be my new exh cam (probably to go with a stock inlet 240 cam). Hence I need new springs anyhow (stockies bind above 8.1mm apparently). Also the 256 would go nice on the inlet with my Wade 267 on exh, at the expensive of a bulletproof low end though...decisions decisions.. Yep, Ben that would be great if you could weight them.
Cheers, Nick

[myne]

--4age Intake valve specs--
Head Diameter = 1.201in. --- 29.5mm
Stem Diameter = 0.236in. --- 06.0mm
Overall Length = 3.925in. --- 99.7mm
--4age Exhaust valve specs--
Head Diameter = 1.004in. --- 25.5mm
Stem Diameter = 0.236in. --- 06.0mm
Overall Length = 3.925in. --- 99.7mm

--B16a Intake Valve specs--
Head Diameter: 33mm
Stem Diameter: 5.48mm
Valve Length: 102.5mm
--B16a Exhaust Valve specs--
Head Diameter: 28mm
Stem Diameter: 5.45mm
Valve Length: 102.5mm

I figure these weights should be a reasonable comparison, since the valves are similarly sized.
http://www.crower.com/cat/import/hon...s_valves.shtml

[Ben Wilson]

Yep, Ben that would be great if you could weight them.

No worries, the're in a mates shed somwhere, I'll have a scrounge next time I'm over there.

[30psi 4agte]

just curious : What size are those valves nick ??

[nick.parker]

Hi,
Follow the link and all shall be revealed . The inlets are 1.5mm o/s (32mm) and the exhausts are 2mm o/s (27.5mm).
Cheers, Nick

[30psi 4agte]

they are basicly the valves i use. - exactly the same size anyhow .
they arent nitrided though

[Ben Wilson]

For comparison, these are some inlet flow figures a friend of mine got for atlantic valves vs standard, not sure how much porting he did here. I think these numbers are @25"

lift---4age std---------4a atlantic
mm-----29.5mm v---------32mm v
4-------111.6-------------123.3
8-------159.1-------------199.2
12------183.4(197hp)------230.8(247hp)
16------185---------------243.5

FWIW - These are the figures for a stock integra type R - damn...

mm-----type r
4-------114.3
8-------201.1
12------249.2(267hp)
16------262

[Ben Wilson]

I finally got around to weighing some last night. Stock bigport valves:

Inlet - 41g
Ex - 36g

Sorry it took so long...

[nick.parker]

Thanks for the info Ben. Was your friends 4A a bigport?

[takai]

All the valves are the same size from memory, bigport and smallport. 20v on the other hand....

I wonder what it would take to get valve guides made up for a 5.45mm stem