Anyone know if they will fit into an S13 SR head without any modification ?

Please only actual info, supporting reasons why too.

 

no they don't, they are totally different from a regular sr20

 

They are valve springs, they are circular and about the same stuff, now if you've test fit them and the inner springs are too small ID for the seat that makes sense, but I have a feeling you are just guessing based on the head being different.

Have you in fact tested them on an S13 head, or at least measured the seat on an S13 and the spring diameter from a GTiR ?

 

Actually, the head is very much the same as a regular SR20. I'm wagering that it's fine, but I haven't done it. I'm pretty sure you can use the mechanical lifters out of there, too. The rockers are identical, and so are the shims.

 

So far from the itty bitty bit that i've been able to find, the rnn14 uses an installed height of 38mm, the rest of them a 40mm height, do you think I could use extra stock shims under them to correct for the difference reasonably ?

I've seen the rockers a good bit and they have retainer clips that hold them to the lifters, and im pretty sure the lifters wont swap over, however havent tried it personally.

My whole reason for wanting to use the stock GTiR springs, is that I may be able to get a set with the GTiR cams, for a good deal, and just want to use them for now with a set of tomei lifters.

 

GTIR heads are totally differnt in every way from a regular SR head
GTIR Intake ports and wider apart, Combustion chambers are Hemispherical, Solid lifters are built into the head (pivot head screws in) head stud sockets are positioned different

Just buy a BC kit from Enjuku
Brian Crower Valve Spring and Retainer Kit for Nissan SR20DET - Enjuku

I installed this kit on mine

 

None of that has anything to do with the valve springs, like I said, so far the only difference is the installed height, which should be able to be fixed with shims at the bottom.

$200 for lifters, or $200 for lifters and $200 for springs / retainers, when I know the GTiR springs will be fine with the lift on the stock cams. I'd rather not spend the extra money to put upgraded springs in this head right now as i've got another head sitting for an actual build and will either go for the bc spring kit, or possibly the supertech kit when the time comes along with tomei or jwt cams.

 

I was correcting wrong information

Why gehtto rig something which will either give you crappy compession by the valves not sealing the chamber completly
or possiblely floating a valve?

its $200 for Valves and Retainers

you can get Solid lifters from RHD japan.

so your building 2 engines? why not save money for the other engine and just keep this engine stock

 

Its $200 for springs and retainers.

I have a lifter or two that want to play games collapsing and coming back to life. Just want to fix this issue for now so nothing goes to hell before I can build the other.

 

Blah... I ment Valve Spings


the valve springs have nothing to do with the Lifters
If its your lifters that having problems this is what you need
The Nismo Shop : West Covina Nissan : Nissan OEM Hydraulic Lifters - SR20DET