ok guys heres the deal...im really wanting to put my 454 together just to see how well i like the BBC thing,if i dont,then its back to the bottle fed 383 ;)

anyways,ive got a really good deal on a set of L2465F 0.030 forged 454 pistons.....basically,heres what the combo would be:

-0.030 454
-L2465F pistons (.215 dome) 9.7:1 w/ 116 cc heads
-049 oval ports stock valve size no port work
-solid roller cam
255/265 dur. @ .50
lobecenter 110
lift 630-650 with 1.7 rocker

4000 stall
4.10s
28" ET Drags
77 camaro 3500 lbs

---so guys what do you think of this setup?id like to leave the heads as is now,with some pocket work and larger valves installed down the road...i have a few concerns,but im new to the BBC so im not sure..

i know 049 chambers are all over the place cc wise,but will compression in te low 9's be too little for the cam,even with the 454+ cubes?

also,how well do you think this setup will do?it is gonna be sprayed also,but i would like some N/A #s in the mid/high 11's atleast(being thats what my old 383 would run)

tell me guys what you think and what you would change if you dont mind ;)

p.s....how well will the external balance work on the 454?im using stock length rods which is why i ask,should be shifting @ 62-6300 im thinking

Too much cam for the heads. It will be real lazy, especially with the low compression.

Build it accordingly, with the proper planning for compression and quench, where cam matches compression, heads. Build it as a total package. If not, you will be very disappointed. This goes for any build.

oh i was under the impression these heads were very decent....

i was just worried about the comp. being kinda low...i was running 10.9:1 in my 385 with a 258/266 @ 0.50 and it definately wasnt lazy,but i didnt know if maybe the extra cubes would make up for the lower compression....

and how well would the gearing/high stall help combat the soggy lowend?

Those heads are fine. You have to CC them to see where they actually are size wise. Your low end will probably be fine due to those oval ports. Just make sure on your piston to valve clearance. A little more compression would help out power some though.
I had issues with a set of TRW 2399s. I had to get new pistons and i had less duration and lift than your cam. You may be OK but check it closely.
With 4.10s and a 4000 stall you will be fine.

what would be the optimum c/r needed for this setup?

I'm right at 10.3:1 on my 454 with 781 oval ports which are very close to 049s. I can run 92 octane with no issues but it all depends on your whole setup. I would shoot for 10:1 at least or go with a little smaller cam.
I hope that you aren't running power brakes with that cam, seems like the vacuum might be a little low.

For that cam to work you would need to bump compression upwards of 11.0:1 (once your in this range your out of pump gas so go for the gusto and really crank up the compression). With everything else you have and high compression it would be a killer combo. Unleaded pump gas sucks with big blocks that really like higher compression (more so than small blocks in my opinion).

With what you have I would go with the CompCams Magnum grind number 288R part number 11-692-8 which specs out as 246° / 246° @ 0.050" and 0.623"/0.623" lift with a LSA of 110°. I personally think a big block needs a split duration cam that favors the exhaust so I looked at Crower and they have an old grind part number 01476 that has specs of 252° / 254° @ 0.050" and 0.585"/0.578" lift with a LSA of 112°. The slightly wider LSA will allow a little more duration without as adversely effecting vacuum; though both cams will have a rough idle.

Since I would favor the CompCam with more lift, you might consider running a Harland Sharp 1.8 roller rocker to favor the exhaust side. Once again verify you don't get into coil bind, and have enough valve to piston clearance.


Larger Dave

hey thanks for the info

lets say i did bump the comp. up to 13.1,what would your thoughts be....it would be nice if i could run the #'s N/A so i dont have so much on my plate at one time ;)

I think the best thing you can do is bigger valves and some bowl work, this will make power everywhere, and work with your cam choice better.

ivr run same pistons in denver with a little smaller roller cam.my car had tons of bottom end ,and i know you'll make way more cyl pressure than i was. car weighed 3500 pounds with me and ran 11.50s all day with street tires and full exh.:)and as usual i agree with 67rs502 that you need bigger valves and head work those 049s will support alot more power than people give them credit for:thumbsup:

13:1 is fine if you don't mind paying like $10 a gallon for fuel.

13:1 is fine if you don't mind paying like $10 a gallon for fuel.

One word - Avgas

100LL is 115 octane and has enough lead to make AlGore cry.

Oh, yeah - last I paid was $4.18/gal