Where to buy valve springs

manga_blue · Postby **manga_blue** » Mon Sep 10, 2012 8:52 pm

The car has been sounding more like a threshing machine lately. Time to set valve clearances I thought. Turns out I couldn't even measure the gap on 10 of them, with so little preload on the springs that I could push the buckets down with my little finger. One of them couldn't even extend fully and the gap was at least 34 thou. The valve closing pressure must be so low that I can't understand how the car was running at all. Not happy - these springs have only done 20k and about 20 meetings.

This is an NA8. Standard base circle diameters. Mazdaspeed shim-under buckets. I run it up to 7500 on almost every shift but it's pretty unlikely I'll ever use this head to spin past 8000rpm.

Can anyone tell me what springs might do the job and where I can buy them?

Postby **NitroDann** » Mon Sep 10, 2012 8:55 pm

wozzah for one.

Dann

StillIC · Postby **StillIC** » Mon Sep 10, 2012 10:43 pm

I bought my Supertech springs from 949Racing.

Are we even now?

manga_blue · Postby **manga_blue** » Tue Sep 11, 2012 12:09 am

Not yet, StillIC, they're probably over spec for me and definitely over my price point.

Thanks Dann, will try wozzah tomorrow.

ralt · Postby **ralt** » Tue Sep 11, 2012 12:43 am

Hi.
You could look at Eibach valve springs.

project.r.racing · Postby **project.r.racing** » Tue Sep 11, 2012 8:51 am

considering that you wanna hit 8000rpm. the supertech ones will not be over spec or over priced.

Postby **NitroDann** » Tue Sep 11, 2012 9:06 am

Stock is fine for 7200rpm all day long with some baby cams. So what makes you think you need huge spec for another 800 on stock cams?

Dann

project.r.racing · Postby **project.r.racing** » Tue Sep 11, 2012 9:20 am

well if stock is fine, then why the need for the thread? wouldn't someone just go buy some more stock ones or pull some good used ones from a low km engine? or am i thinking just too simple?

manga_blue · Postby **manga_blue** » Tue Sep 11, 2012 11:44 am

No, I know that stock won't do it. A stock NA8 is redlined at 7200rpm. NA8 springs are different from NA6 ones and they barely make it to 7200 new. Stock spring spec is min length of 39.5mm with a load of 50-56lbf. My original set was just out of spec (average around 39mm at 50lbf at 160,000kms) and started falling off from 6600rpm. I replaced them with mid spec used stock springs which started to fall off at 7000. The springs that I have in the car now were originally about 25% stiffer than stock and were logging virtually linear acceleration to 7500+. It's very disappointing that they've fatigued so fast. They were not ebay dodgies.

So that's all I need - about 25% stiffer but with better metallurgy. Looks like the Eibach spec is good enough, just need to know about quality. Seems like I might have to wait until wozzah's back first though.

ralt · Postby **ralt** » Tue Sep 11, 2012 12:08 pm

Hi.
Eibach will do the job. Quality is very good.

sailaholic · Postby **sailaholic** » Tue Sep 11, 2012 12:29 pm

Hmmmmmmmmmm! Interesting your having problems with stock and near stock . Might also have to talk to woz when he is back.

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