I've got a drop-in single and dual valvespring upgrade.

[SuperHatch]

But I'll keep you all in suspense for now, I'll have pictures and exact specs tonight.

[SuperHatch]

As promised...

On the left, stock... on the right, the mystery spring (notice less coils)



Diameter is the same...



Free height is the same...



Stock retainer in stock spring...



Stock retainer in mystery spring...



Stock on left, mystery outter on left, mystery inner on right...



Inner on stock retainer...



Stock retainer with dual setup...



Stock spring specs...

55lb @ 1.400 in137lb @ 0.975 inCoil Bind @ 0.960 in

Mystery Outer...

64lb @ 1.400 in145lb @ 0.975 inCoil Bind @ 0.795 in

Mystery dual...

90lb @ 1.400 in205lb @ 0.975 inCoil Bind @ 0.800 in

As you can see, the mystery outer alone is slightly stiffer than stock and allows ~0.165 more valve opening.

The mystery dual allows 0.160 more opening and is significantly stiffer than stock.

So what springs are these??? Manley replacement springs for a Honda H22. In addition to the springs, the H22 Titanium Retainers can be bored out to fit the 7mm valvestem of the VH valves.

I'll be running this dual setup in my motor. Mettler, I'll be in touch about some cams...

[gs14racer]

So what your saying is you can drop in the singles or duals with the stock vh retainer and no machine work?

[konatown]

That's fantastic work!

Mettler put me down for a set also!

[perana]

Thats F**king fantastic good work .What the hell is a h22? Can this be orderd at any performance shop. once again good work man

[SuperHatch]

Thats F**king fantastic good work .What the hell is a h22? Can this be orderd at any performance shop. once again good work man

A Honda Prelude stock engine is an H22...

[SuperHatch]

So what your saying is you can drop in the singles or duals with the stock vh retainer and no machine work?

Singles, yes... duals... I'm working on confirming that.

[perana]

So ur still not sure about the double springs,but the outer defnately works.The outer should still be an upgrade. I'm going to get 2 sets tommorow,ester weekend everthings closed

[SuperHatch]

So ur still not sure about the double springs,but the outer defnately works.The outer should still be an upgrade. I'm going to get 2 sets tommorow,ester weekend everthings closed

http://www.fabre.com.au/

Call them to get the Manley parts in AU...

I'll have confirmation on the inners next weekend. The worst case is the need for custom retainers and/or modification to the valve seat.

[perana]

Do u perhaps have a part no. I dont mind doing a bit of machine work.Cant wate to do some performance upgrades to my vh

[riu]

wow this is really phenomenal. i can't wait to graduate from school so that i'll finally have time to start my build

[SuperHatch]

Do u perhaps have a part no.

22110-16

You'll need 2 sets...

[TXCumtrensh]

Great work.. first valve springs, next CAMSHAFTS!!!

Too bad the JWT SR camshafts wont "bolt in"... it would be game over

[Mettler]

Maybe it's just me... but the free height looks different between the two ? Optical illusion perhaps?

Anyways, great find mate! As far as the cams go, I'll keep you posted. It's going to take a while, finances are somewhat limited with regards to prototyping, but I do intend to go through with it in the next couple of months.

[mtcookson]

Maybe it's just me... but the free height looks different between the two ? Optical illusion perhaps?

I was thinking the same thing.

[SuperHatch]

I was thinking the same thing.

Well, The free height isn't EXACTLY the same. The stock spring in this picture is 0.030" taller than the H22 spring. I measured another stock spring and the difference was 0.020".

[mtcookson]

Definitely an optical illusion then because I don't think we can see a .030" difference all too well.

[Nyloc]

Awesome detective work! Thanks for sharing the knowledge

[SeanDean]

So these will work on both intake and exhaust sides?

[SuperHatch]

So these will work on both intake and exhaust sides?

Yes, The intake and exhaust springs are the same.

One other thing I'm working on...

The stock Intake valves have a 7mm stem and the exhaust valves have a 8mm stem. 8mm is rather large and I believe is a result from the sodium filled design.

Manley can make any custom intake and exhaust valves, but they have a limited supply of exhaust blanks with an 8mm stem.

I don't know if anyone else has noticed or not, but the stock exhaust valves have an 8mm stem except for a taper to 7mm where the retainer attaches. I'd assume this was done to keep the retainers the same on the intake and exhaust valves and to reduce cost.

I need to find a replacement valve guide for the exhaust side that will allow me to run an exhaust valve with a 7mm stem. This will provide many more material choices for exhaust valves and I can still run the same retainer on the intake and exhaust valves. (And no, the outer diamter of the intake and exhaust guides are not the same, I'm not that lucky)

Also, Manley will have no problem taking their Titanium Honda Prelude retianers and boring them out to work with the 7mm stem size of the VH valves.

[Q45tech]

How will the HLA react to this 50% stronger spring?

[db_autotek]

Thats interesting 45tech, I was wondering the exact same thing, as I know from experience alot about HLAs, early miatas had tons of problems with these. I'm inclined to believe that you would definately have to change fluid weights! And dino oil would never do (who uses that anyways). Good news is the VH seems to have some excellent oil flow charachteristics so the hla oil galley wouldnt have to be bored out (like in race 4cyls) to keep it wet. But I'm babling, my concern is that with the .02-.03 difference + increased stiffness that the hla could reliably maintain the valves' zero clearance. Input/ideas/thoughts?

[perana]

I did not think about HLAs when I purchased the spring.But everything is trial and error on theese engines, so if anything goes wrong nico will be the first to know.I will be fitting it in a couple of weeks time.bussy on a lexus powerd 300zx up until then.The lexus fans have it so easy hey,sump in the back motors smaller aftermarket support is not bad.

[db_autotek]

A lexus powered 300zx? ha haa.

[perana]

Yeah its a joke.But a pretty cheep and easy fitting joke,its not mine by the way.Easier than the RB30det swap I did in January.

[db_autotek]

Yeah. I was trying to figure out which Lex engine was going to provide better overall output than the 300zx platform, considering all the easilly available mods for the 300zx. which one are you swapping in?

[perana]

It was a na.The motor 1uz 4.0l v8.in new zealand Z cars are not as loved as in the US,theres not much after maket for them.most guys just go for skylines or silvias,a good z32tt m/t can be had for $5000.The reason I say its easy is because I have a vh45 in one off my cars, this swap was first done in one of my others.But after it burned I found out how rare this car is I returned it to stock

[gs14racer]

Thats interesting 45tech, I was wondering the exact same thing, as I know from experience alot about HLAs, early miatas had tons of problems with these. I'm inclined to believe that you would definately have to change fluid weights! And dino oil would never do (who uses that anyways). Good news is the VH seems to have some excellent oil flow charachteristics so the hla oil galley wouldnt have to be bored out (like in race 4cyls) to keep it wet. But I'm babling, my concern is that with the .02-.03 difference + increased stiffness that the hla could reliably maintain the valves' zero clearance. Input/ideas/thoughts?

As far as I can tell the sr20det uses the same lifters as the vh45. And people have been running double the spring rates on sr20's for years with the stock HLA.

Very soon I will have a direct comparisson to see if its possible to use 4 sr20det solid lifter kits in a vh to convert it to solid lift.

[Mettler]

Solid lifters work pretty sweet but it's noisier, and then you have the issue that they'll eventually wear & require replacing.

Also... do solid lifters have an oil hole going up through the middle of them ?

[gs14racer]

Yes they do have the oil hole, i know some people who have over 50k miles on there solid liftered sr20's. If the lash is set correctly wear should be very minimal. The only thing with them is up keep. It is recommended that every 8k miles you check the lash and reshim if nescacary.

If your car only comes out on weekends or is trailered to the track like mine, it should last you a long time.