jonnyc

iTrader: (18)

what cam specs would you run wth this setup

stock ls1 bottom end.241 heads milled to 60cc.valves are 2.02/1.60.its going in a 69 firebird.should weigh close to 3400# and i'm running a t56.
looking to get great torque and mid range power.don't really care about peak hp #s
here is the flow sheet


thanks

JPH

iTrader: (2)

carb motor i take it, or fuel injected?

jonnyc

iTrader: (18)

fuel injected w/ls6 intake

JPH

iTrader: (2)

224/224 .585/.585 112+4 will be a great trq. monster, and pulls hard all the way to 6200k, peaking around 6100. as long as you keep a 3:42-3:55 gear in it, it will pull hard man.

jonnyc

iTrader: (18)

the car will have a 9" rear with 3.89 gears.my first thoughts were to go with a 228 or 230 cam.but i was wondering if a split pattern cam would be better or not.

Asmodeus

what is your exhaust system going to be like, and what size primaries are you going to use?

jonnyc

iTrader: (18)

i would like to run 1 7/8 lt's but i think everyone only has 1 3/4 for the swap.unless i make my own.dual all the way back with gmmg chamber 1st gen.probably run 3" tubing and crossover.

Asmodeus

are you looking to stay away from flycutting?

JPH

iTrader: (2)

224/228 .590/.590 112+4 (crane LSHS lobes) is the biggest i would put in it, along with 1 3/4" primary tubes w/merge style collector. like amdeous said, fly cutting might be an issue, as well a pushrod length. all that stuff would have to be verifyed by final assembly. good luck

jonnyc

iTrader: (18)

i'm not against flycutting.i figured that with 60cc heads i would probably have to flycut anyways unless i went with a small cam.
i was looking at maybe futral 232"/234" .598"/.598" 112LSA,tsp 232/234, .595"/.598" 112lsa,or tr 230/236 .592/.602 112 LSA.

Asmodeus

lobe choices are up to you, both crane and comp have good profiles, but if you don't mind flycutting and a choppy idle, and want some great midrange torque, You might want to look around a 230/234 111+1. With a 60cc chamber and .040 cometic gaskets, the 224/228 would net you a DCR of 9.26, which would be a bit much for pump gas. The 230/234 111+1 would net you a 8.89 DCR (my spreadsheet does read this a little bit high, by about a tenth of a point) which would run on 93. 10 degrees of overlap (relatively easy to tune for example a t-rex has 25 degrees!), with overlap centered over TDC, 49 degree EVO = good torque in the low-mid range (your compression is going to help this a lot too), 45 degree IVC should peak right at 6300, so shifts at 6500 would be perfect. You would have to flycut for this more than likely to achaive safe clearance, but it would be worth it. High compression + good quench + good EVO = torquemonster!

jonnyc

iTrader: (18)

the flycutting doesn't bother me.my only other problem id californias crappy 91 octane gas.but as much as this car will get driven i can always add 5 gallons of race gas with 10 gallons of 91.
i actually would like a nice choppy idle and with this car i don't have to worry about smog.i just want to make sure my brake booster has enough vaccum to work right.

what do you think about the lg G5X1 228/232 .588/.574 112

PREDATOR-Z

X1 is good but I would go custom:

227/230 .643/.604 112+4 LSA, your heads carry well till past .600 lifts so you can benefit from the extra lift.

jonnyc

iTrader: (18)

just curious,what do you think about the asa cam for these heads.i've read post that this cam make great mid-range power.you think the asa would work well with these heads or go with Asmodeus suggesion with the 230/234 111+1 cam.
with the asa being low lift,you think a can get away with not flycutting on that cam 226/236 525/525 110lsa

Asmodeus

the duration is the factor in PTV clearance, not lift.. at max lift, the piston should be at or near the bottom of the hole already. the asa cam would leave a lot on the table. for example, look at your flow numbers. Now ignore everything over .525.. why would you want to cut the heads off from flowing to their potential? It'd be like putting a restrictor on your motor. The ASA cam is a good cam.. but it was designed to run a class that had restrictions on it.. like they had to use stock springs.. so they had to kee[p the lift down. It's not made for max effort stuff. Just make sure your intake manifold can breathe and you're going to make killer power with those heads and a good cam to take advantage of them..

jonnyc

iTrader: (18)

can someone tell me what the dcr would be with this cam 228/234 .607/.598 110 +2 and these heads.i'm clueless on figuring this out.
thanks

JudgeGuns

iTrader: (1)

if you are really serious about more torque and mid range and really don't care about peak horsepower go with a reverse cam 230/224 or something in that range and keep your lift under 585 to save your valves in case you tip 6500 rpm :0 more lsa will give you better low end and midrange no lower than 114
and do not get aggressive on the cam lobe lift angle.

my .02 G/L !

most these cams here are hi revving cams hi horsepower cams