I was just guessing =P I figured the less space between the valve and bore wall the less flow... hehe.
My Daily: NooB's Delivery Vehicle
My wife's Daily: Series B RA40 Liftback 22RE, power steering, AC. Cushy as.
Current Project: NooB 3TGTE swap
Back Burner: 1964 Toyopet ToyoAce, and a Series B TA45 GT coupe
Too many cars
Just buy a valve spring load test bench. Or weight scale what is made to use in that purpose with hydraulic press or with bench drill.
Classic personal weight scale can use also, but usually had to add some sheet metal over scale to stop bending the scale cover.
Rates are measured install height, and open. = install height + lift.
To that 2TG valve clearance to bore, its faaar away... There is squish ;-) like ~5mm. And with same size bore than combustion chamber, the valve is in angle, so its not cut flow. 2valve real hemis always accept as big as possible, but if that needed, depends at some other things also. With stock intake ports.. No needed.
- Celica TA-22 -74 2T-G Turbo
- IQ 1.0 -09
- Lexus IS250 -06
Ok guys here are the spring specs I got from Sleeka Spares, what does it all mean?Hi Mate,
Sorry for the late reply, I have the specs now.
Spring height 1.85”
OD of Outer spring 1.325”
ID of inner spring .710”
Seat Pressure 1.650:65 & 1.530:95
Open Pressure 1.160:220 & 1.100:240
Coil Bind .895
V.S.I Shim 302
I hope this helps.
Spring height in inches & rated pressure Lbs
A lot stiffer than stock ones,
- Celica TA-22 -74 2T-G Turbo
- IQ 1.0 -09
- Lexus IS250 -06
What that means is RR4's, 310lbs/inch as in the best springs for 2tg/3tgeu/3tgeu.
Don't bother with any others they are the shizzle or go look at other specs if you like...
Camshaft duration is all about the Lift @ Duration not the "Advertised duration"
If you look at charts of Lift/Duration you will see the difference.
Will leave it at that.
It's a part number of performance springs.
Have sussed out other spring manufactrures "but to no avail"
Means as you say:
1.650"inch at 65 lbs per inch
1.100"inch at 240 lbs per inch
What is your cam lift?
0.400"?
0.410"?
0.420"?
Lets just say RR4's are great lb's / inch and good coil bind rate.
This calculator give good info ... just need to know all these details...
http://dairally.net/daihard/chas/Mis...alveSpring.htm
- Celica TA-22 -74 2T-G Turbo
- IQ 1.0 -09
- Lexus IS250 -06
In a 4AGE you will get one advantage using O/S valves on machined, but otherwise stock seats.... the first .100" of lift you will SUBSTANTIALLY improve flow... but the advantage goes away quickly.
The reason you can't just open up a stock seat to O/S specs is there would not be enough seat left for the head to retain. It would be likely that the seat would not last.
Information is POWER... learn the facts!!
Well said, I have flow benched many 4AGE heads, 16v and 20v, when selecting a cam, the first thing I do is flow bench the head, no point putting 11.00mm lift cams in, if the head runs flat at 8.00mm, once I have got the lift worked out, then it's onto the duration depending on what sort of rev range is required.
It amazes me how many people port their heads without doing a before and after on a flow bench, it's rare I see someone do a before and after and actually get a gain, some heads look awesome but flow worse than standard.
i go for more lift if its shim under and stay around 250 to 260 duration at 50 thou ,cams with to fat a nose are getting up there any cam after 265 duration at 50 thou is going on full race cam
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