if the maatouk boys such as GH can produce these amazing times with a SOHC , twin cam can stick it up its ass ! never been a fan on 26/30 , doesnt belong in a VL i say

^^^ i kinda agree im a fan of single cam and after what gh747 has done with one i think the single can make the power 99.9% of willnever go past

I have had all of them and really doesn't bother me either way as a modification is a modification.... Tell me how much of the high powered single cams have standard parts from Holden still? Anyways the 26 head coversion is cheap in gist of things, mine before rebuilding it has stock ports, valves, inlet and throttles and made 600rwkw through the glide and 9" and was still making power but blew a hose so we stopped. All the complete top end can be bought for $1000 minus the turbos and I'm sure you can't make that sort of power with the same bolt ons on a single cam. But at the end if the day you can't use the power on the street either way you go.

I also like prefer looking at a wrinkle red rocker cover Some original photos have not been recovered yet.

DOHC engines can be tuned for a wider range of torque with or without VCT than SOHC engines. usually means smoother idle, earlier boost response, broad flatter torque curve. sure total power may be the same in dyno figures but the graph will be vastly different. They rev quicker due to less valve train weight mass needing to move. this equates to less valve spring seat/open pressures which mean less wear'n'tear, less chance of a valve dropping. Rb26 heads are solid, so top end gains are built in. RB25's are hydraulic but due to lower spring tensions can rev happily to 7500 in standard form. Personally, I've tuned them all and 20/25/26/30 @ full song with a waste screamer dumping flames as you smack the next gear is the bomb regardless of the head. Tin Cans just look bigger and therefore must be better Some original photos have not been recovered yet.