confused327

i am putting together a 327 with 58cc heads and flat top pistons. i was wondering how big of a cam to use(i was thinking a cc268), i want it to run on perferably 87-octane but if thats not possible 92 must. the car will be a street car and i dont want to spin it that high. the tranny is a th400 and the rear will be either a 3.08 or a 3.42. a lope would be nice but not necesary, i wont sacrifice performance for a sound. i think i know what i want but have no idea how to get it
every little bit is apreciated

spinout

go with EX274H will work well for you im running a 327 with76cc heads and dome tops Im running the EX284H but with your setup it would be too much for your engine

killer305

i would recomend calling comp cams giving them your specs and haveing them recomend a cam

confused327

i saw the 274 but i dont want to put in a stall converter or wont it be necessary? thats why i thought the 268 according to the website with it i coould use the stock converter.
thanks for the replys.

GPZ28

I run the XE 268 in my 67 elky with 327 and its a nice mix of power and sound. I do however have a very small stall hughes convertor, Its like 2000. I dont even think it is really needed. Go with the 342's or it will be real soggy down low.

confused327

how much difference in power would there be between th 268 and 274?? if its not much ill go with the 268. if you dont have any proven #'s just give a guess.
thanks

stale

Check this article out, the guys build a pretty beefy 327 that runs on pump gas:

http://www.rodandcustommagazine.com/techarticles/74620/

confused327

yes youve shown me that before but now i am wondering which cam the 268 or 274
stats for the 268

Intake Duration 050 inch Lift: 224
Exhaust Duration 050 inch Lift: 230
Duration at 050 inch Lift: 224 int./230 exh.
Advertised Intake Duration: 268
Advertised Exhaust Duration: 280
Advertised Duration: 268 int./280 exh.
Intake Valve Lift with Factory Rocker Arm Ratio: 0.477
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.480
Valve Lift with Factory Rocker Arm Ratio: 0.477 int./0.480 exh. lift
Lobe Separation (degrees): 110

stats on the 274

Intake Duration 050 inch Lift: 230
Exhaust Duration 050 inch Lift: 236
Duration at 050 inch Lift: 230 int./236 exh.
Advertised Intake Duration: 274
Advertised Exhaust Duration: 286
Advertised Duration: 274 int./286 exh.
Intake Valve Lift with Factory Rocker Arm Ratio: 0.487
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.490
Valve Lift with Factory Rocker Arm Ratio: 0.487 int./0.490 exh. lift
Lobe Separation (degrees): 110


whats the difference of the two power wise?
will i actually need to put a stall converter in with the 274?
remember this is a 327 and thanks forthe replys

stale

Sounds like you need to get yourself a copy of Desktop Dyno and plug those numbers in to see what a power curve might look like.

2 z28s

on my desk top dyno with small tube headers the 268 made 366 hp @5500and 406 torque @ 3500. the 274 made 373 hp @5500 and 404 torque @4000. i also guess that your comp ratio was 10:1. hope this helps

confused327

Thats great!! Was that w/ a 327. It sounds like way more power than i was expecting. I think the 268 will do because of the improved idle and 7 hp isnt that much. What was the entire set up for that motor if you dont mind me asking??? thanks that helps alot>

Green95Z28

My girlfriend is running a 327 w/ dome top pistons with 64cc heads (10.47:1) we WERE running the edelbroke (shattered a lifter so now they have a new name) performer RPM cam and intake with world products sportsman 2 heads, the car ran a best of 12.31@110 (it only weighs 2900 in full street trim with driver) Now we are running the isky z35 w/ a victor junior intake and we have yet to run it down the track, both were GREAT setups and both have good choppy idles

confused327

Thats great but my heads are no where near sportsman II's they are stock 58cc heads with 1.94 valves and bowl work done by me. So 12.3 is a little out of reach N/A, i think. but thanks for the info i may look at a set of those when i get tired of this set-up and have a bit more $$$.

is yor g/f's car a 3rd gen??? thats what im working with

Green95Z28

no its a chevy vega What I am saying is that the edelbroke cam and intake combo is a VERY viable combo for a low 13 second combination in a camaro

sheppard00

a third gen is pritty heavy so I would go with the 3.42's and the xe268 I know it's not "needed" but I would also run a 2500 stall in that combo. it will make a huge diff int the seat of the pants and track time's that little enging needs all the help it can get to move that car and that size stall is very streetable and at least kinda gets you in your powrband off of the line. if you run an off the shelf stall then order a 3000 bucause it will stall a little lower behind your 327 and they usualy don't stall to the advertised rating either. an rpm airgap would be my choice of intake but it wont clear the stock hood.