351W with Victor Jr heads, more HP needed
Hi All, I'd like to pick a few of the clever brains out there.
I have a 351W (69 Block) with Victor Jr Heads (small port work) and would like to know if anyone has some advice to get that little bit more out of it, especially over the 1/4 mile.
Heres the specs, 351W, Crane solid 245/250@50, Victor Jr heads with mild porting, Edelbrock RPM Air-Gap dual plane Manifold, Barry Grant 750cfm, 9.5 to 1 compression, forged pistons, balanced standard bottom end with arp bolts. 1-5/8 tri-y headers, 2.5 inch exhaust. Msd ignition (dizzy and 6AL) 16 degrees base and 35 total.
This combo produced 340 rwhp and has run a 12.3@111 in an XW Falcon, roughly 3450 lb car, toploader and 3.7 rear with 26" tall street slick type tyres, crossing the line at about 5500 rpm and a best of 1.8 60ft
It drives great, has strong torque down low, but I guess I would be happy to trade some low end torque for some top end HP as racing only seems to use 4500-6500 rpm
My question....what can I do without pulling the engine down and stroking, decking etc to get the car to run a high 11.99 et ?
Would a 4-1 set of headers help, maybe something bigger than the 1-5/8" I have now ?? I cannot find a 351W 4-1 header here in Australia, they seem to sell lots of variations of 302W 4-1's....would these fit ??
I also have a Victor Jr single plane manifold sitting doing nothing, would that help ??
Any help would be greatly appreciated