what are evo 9 springs install height?

[Aproductions]

I am using evo 8/9 springs and need the install height for them. Also what should the valve stem tip height be?

thanks.

 

[Aproductions]

Does anyone know this at all? I need it for the build.

 

[VETTE_50_TH]

I cant tell you the height but they are the same as the dsm springs. Install them straight up

 

[flaatr]

Advantage?

-Raffi

 

[ViciousLord]

wait wait wait! Evo springs work on 2g? Dammit i knew i should have held out selling my evo stuff!

 

[Aproductions]

this is what i found.

Some general data used in the test to "standardize" the results a bit.

Installed height general numbers (1.560) for comparison; this includes the mitsu locator given at an average value of 40.

.410 will be used for cam lift.

As follows;
DSM
Coil Bind
1.115
60
1.175 SAFE

1.560 = 68lbs
.030
1.530 = 72lbs
.410 LIFT
1.120 = 192lbs

But we're under where we need to be. When performing this last squeeze there was no daylight left. ABORT ABORT! DSM spring is KO'd. Even if we pull the shim its still over.


EVO
Coil Bind
1.035
60
1.095 SAFE

Installed height general numbers (1.560) for comparison; this includes the mitsu locator given at an average value of 40.

1.560 = 65lbs
.030 shim
1.530 = 72lbs
.410 will be used to simulate cam lift
1.120 = 154lbs

In referance to our original coil bind number, we can see we still have room on the Evo spring. Showing the benefits of the semi-beehive springs and its much looser coils. It would take a 60 thou shim to max this scenario out.


weight

DSM
Spring: 56.3g
Retainer: 13.7g

Evo
Spring: 39g
Retainer: 3.9g

The Evo Springs have lower coil bind specs, due to the semi bee hive construction, But the DSM springs are actually stronger? other than the coil bind being at a lower height, and that they are way lighter?

 

[Aproductions]

so which of the numbers for the evo specs do I need to give the machinist?

 

[Aproductions]

Does anyone know for sure what the info is to install them?

 

[Aproductions]

has anyone put them in their cars?