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What valvesprings are best/good quality to use with R-cam?

I have been using Scat single springs 2 years now but when took the head of for more modifications found one spring cracked. Snapped in half when twisting it by hand.
Thank god it didnt snapped totally in the dyno week before.

I have measured "gulmärkta" springs but too close to coil bind and too weak seat pressure in my opinion.

Using cheap springs is wrong place to save money,i get it now.

My other engine that im building habe Agap 272-13.3 cam and i allready have new set of those Scat Single HD:s but after one cracked with my daily driver with R-cam i need some better springs in that also.

max race rpm?

Jens Gustavsson skrev: ↑tis sep 26, 2023 7:27 pm max race rpm?

7000rpm limiter.

Those Scat springs i used to shim 47.5/85kg and worked niçe. Except cracking and pretty poor quality.

Stock Volvo B20 works fine.

Erland

Erland Cox skrev: ↑sön okt 01, 2023 4:41 pm Stock Volvo B20 works fine.

Erland

Thats too easy and simple.
I allready have Isky double springs with dampers for Datsun A12 engine and i gonna try those, 46.5kg seat pressure and 88.5kg full lift.
Made centering washer 4.5mm thick under the spring so now i can get 36mm assemblyheight and my crmo retaimers allready modified to work with double springs same sized as those Iskys that are little bit smaller diameter than Volvo dual springs.

Any good succestions for good springs to use with Agap 272-13.3 cam?