Author Topic: valve timing? (Read 2599 times)

GERGSE30XR8 · « **on:** May 05, 2008, 10:05:02 AM »

Hi, just got me an E30 318is. i'm changing the t/chain & a busted guide, was wondering if there were any gains to be had from messing with the valve timing seings it appears to be adjustable on the gears, i'm high flowing the exhaust and inlet & would like to optimize outright performance by maybe tweaking the cam timing abit, i was thinking of advancing the inlet cam a bit but not sure what to do with the exhaust cam? i am a mechanic so i know i've gotta be careful with valves hitting pistrons etc. this subject may have already been covered but i'm pretty new to this forum stuff so please excuze my ignorance [and spelling]. Any help would be greatly appreciated....Thanks

nomad · « **Reply #1 on:** May 05, 2008, 10:33:27 AM »

I read 5* intake cam advance helps but not sure. I only get 91 octane gas here so I'm afraid of inducing detonation with some of these mods. Can't do chips either as they require more octane.

mikedz · « **Reply #2 on:** May 05, 2008, 10:39:31 AM »

I've read the same thing 5 on the intake and the exhaust it seems is just left alone.

GERGSE30XR8 · « **Reply #3 on:** May 06, 2008, 06:33:25 AM »

Sweet! i'll give that a go, thanks for the info guys.

Kingsly · « **Reply #4 on:** October 13, 2008, 11:12:10 PM »

Sorry to resurrect a thread but what ever happened? Did advanced intake timing help/change anything? Safe?