selfinfliction

will have finished pics this evening when i pick up the head...

stock Intake ----- Exhaust (these taken from zzp's site)

.100 76 ----------- 72.5
.200 152 --------- 138.5
.300 216.5 ------- 156
.350 232 --------- 158.5
.400 242 --------- 161
.450 247 --------- 163.5

my# Intake ----- Exhaust (ported by HPS, +1mm valves)

.100 76 ------------ 69.4
.200 158.8 -------- 141.6
.300 232.2 -------- 173.4
.350 256.2--------- 179.6
.400 271.8 -------- 183.4
.450 280.0 ------- 186.9

Not too shabby for a $500 port job 33cfm gains on intake, 23cfm on exhaust



<edit> the head i sent him was ported by another company, i bought it on here a few weeks ago. so where it says "1st test" that is the numbers from the prior port job and +1mm valves

MrSlickSter06SS

wow for 500 bucks thats not to shabby, gotta hook me up lol

selfinfliction

he said he may be able to do it cheaper, but didn't want to promise anything mine was alot cheaper than that just because we do alot of business with him. $500 includes flowing it as well.

the only thing he wanted to do but couldn't in time, was to get a junkyard warped/cracked head so he could cut it apart and see the internals. he said he may be able to get alot more out of it, but has never worked on one of these before and didn't want to risk messing up a good one.

selfinfliction

pics:

slowswap

Exhaust could probably be opened up more yet. Not to bad though.

selfinfliction

lol those exhaust ports are matched to zzp's 1.75" primaries. @ a 14% gain

YzRider452

So sick. Im doing mine myself. Hope it turns out ok.

lsjwannabe

iTrader: (1)

Great job

euthanasia

iTrader: (1)

Bigger gains are picked up by working in the port aka bowl area and runners. Heres what my self ported head flowed with the stock valves. The bigger numbers at higher lift don't mean much unless you have cams with the valve lift to use it.
.100 = 75
.200 = 141
.300 = 184.5
.350 = 191
.400 = 196.45
.450 = 198.65
.500 = 200.5
.550 = 204.3

Billig ss/sc

iTrader: (5)

You gotta dyno it soon and give us before/after results

selfinfliction

real good numbers. his issue was that it's the first small head he's ever done.. even had to fab up a plate for his flowbench so it would mount. i wish i was able to get that extra head so he could do whatever it was he needed to do.

your info also assures that he was correct by stating the oversized valves wouldn't help much at all on these heads?

yeah that won't work, alot of other stuff going on at the same time. no way to compare the gains legitimately

euthanasia

iTrader: (1)

Yeah im sure when he gets a spare head he can further improve on his numbers. After flowing my head and seeing the numbers I got from it with the stock valves. I decided not to go with the bigger valves since I got the numbers I was looking for with the stocks. I really dont see the cost of the bigger valves being worth the little gain.