Hey all has anybody used a thumpr cam shaft in there 5L? I heard bout these the other day n I'm curious bout em. I can't seem to find much on the net.

Never heard of it

Well all I can find is there made in Germany n good quality. They can be put in factory 5L with high stall n gears. N obviously valve springs n new lifters. N give a good lumpy note at idol n yet don't need a heap of comp. basically I'm chasing the note without spending big buks n sendin the cars performance backwards. I understand u need comp for overlap n duration but apparently these cams u don't.

Unless ur gunna open the motor up and give it some extra comp, stick to a tried and tested crane 276/284. It won't sound mega lumpy but at least it won't drive like a POS

With so many tried and tested cam manafacturers, why bother with something unknown..? Just save your time and get crow, comp cams, come racing etc etc

Well turns out comp cams actually sell the range of thumpr cams. Can't get specs on there site thou

I can't find anything. Regardless. With a stock 304 you cant have big lumpy idle without it being a slug.

Well looked further into and spoke to a few different comp cams suppliers. They are basically a hot rodder's cam. Lumpy note with aid in performance. So it can b done. Here's the link http://www.compcams.com/Thumpr/ There is nothing listed for the holden 5L on the site but a few suppliers have em stock. N I got the specs on the cam.

Specs are?

227@50 intake 241@50 exhaust. 479 intake lift n 465 exhaust lift. Lobe sep. 107. The lift isn't real big which is obviously good with low comp, as u prob know 107 lsa is a grumpy thing. N spoke to the guys that normal tune my cars. It will work well.

And the other supporting mods? What's the rest of the engine.