leeperryracing

here's what up...i'm in the proccess of assembling a 410ci procharged motor for my Z28 but at the same I want to give the built 355 in the sport coupe a little more power on nuts. I really cant afford to supercharge both cars and i'm already running nitrous on the 355(built 2 1/2 yrs ago with only 8200 miles logged on it). My best run on the 355 was last season with an 11.96 @ 116.45, 1.97 60ft(squeezing a 125 shot off the line). It runs 13.2-13.3's @ 108 all day on ***** and these runs are at 5800ft above sea level(denver). Right now the combo is:
fully forged and arp studded 4 bolt 355, 9:7:1 cr
performer rpm alum. heads 170/70cc, 2.02/1.60 valves
rpm air-gap mainfold with holley 750dp mechanical secs.
comp XR288 nitrous cam 236/248 @ .050, .520in/.540ex @ .050

I was thinking if I went a with really nice set of 64cc, 210-215ish heads(no more than $1500), a victor jr. and a cam with about the same duration but much closer to .600" lift on a 112 lsa(keeping it nitrous friendly) and get my edge 9.5" converter re-stalled from 3200-about 36-3800rpms and I should be darn close or right around where I am with nitrous now, don't you think? i'll still spray like a 100 shot for little kicker(this motor would live till the end of the world on a 100 shot!). The 64cc heads would bump the CR up to about 10:5:1-10:6:1?? am I missing anything out in order to get to my goal? I don't know about you guys but its a very great feeling when you whip a blown/turbo car with a pure ***** N/A motor

ross

I think a set ok AFR 195s would do the job for you with a came swap use a cam with a 106-110 lobe sep you are hitting it with less than a 200 shot. those heads and a good cam with an RPM not a victor intake you will have a good combo and yes you should be real close if not in the 11s on mule alone.

leeperryracing

I was thinking of a set of patriot CNC ported super street heads: 215cc/64cc, 2.08/1.60 valves, titanium retainers, double springs good to .650" lift etc.
Ross did you mean an RPM air gap manifold and not a victor jr? why not a single plane manifold? what about this cam?
lunati hyd. roller prt#lun-54850lun(grind#RRB1-242-252)
2500-6500, adv. duration 300in/310ex, dur. @.050 242/252 .595in/.612ex @.050 110lsa...im looking for a cam that will make real good power on and off the bottle, if you know of a badder cam, please inform me...I drive it on the street a lot in the summer so I don't want a cam that barely idles

89formula350b2l

iTrader: (11)

I thought the xr288 was 236/242 @ .05?

Sonix

iTrader: (1)

He's got the 288 nitrous cam, that's why the even longer exhaust duration

I think that lunati cam you've got planned should work really nice.

I think carcraft or hotrod did some back to back trials with an RPM vs a Victor junior intake. The victor only picked up 5HP at the top end, and lost 20 (avg) on the lower end. It just wasn't worth it, when you look at area under the curve.

89formula350b2l

iTrader: (11)

ross

The patriot heads I have seen work decent. The AFRs I know will do the job.And the 215s will work but the 195s will be better and outflow the patriots also. I like the cam 89 formula picked better. A head like the AFR will have a strong ex side so the big split for nitrous will not be needed. The dual plane rpm manifold is so that you have a much better hole shot small cubic inches need a little help to get motivated. Here are the specs for a motor I put together on a budget for a friend 355ci with trw 2256 flat tops zero decked stock crank and eagle sir rods comp 294s custom ground with a 106 lobe sep and 1.6 rockers dart iron heads I ported just bowels and short sides, performer RPM air gap with a 650 cfm holley HEi ign., hooker long tubes dual 3'' ex with bullets 10'' converter and a 3.73 gear car ran
11.80 on motor and with a 200 shot it went 10.30s

89formula350b2l

iTrader: (11)

pretty badass engine