what do you guys think of this setup???

355cid, all cast internals, 4 valve relief pistons
aftermarket heads, probably trick flow's 56cc's off summit (what would my compression be?)
voodoo lunati cam (about 230 duration @ .050, and 500 valve lift)
accel super ram base manifold, and upper manifold
SLP LS1 injectors (25lbs)
stock TPI fuel rails
custom chip (burnt by myself with data logging, and moates hardware and software)
full exhaust, headers and 3" catback with 3" catco cat
stock MAF sensor
subframe connectors
rear lift bars (B&M adjustable)
torque arm (B&M adjustable)
pan hard rod (B&M adjustable)
rear shocks (adjustable) not sure of the make
10 bolt rear, with new axles, and a posi-tracks differential, with 3.73 gears
700-R4 transmission with TCI rebuild kit

This is all in or going in my 89' formula firebird, that had an original 305 TPI but now has a 355 with 305 heads. i'm looking for suggestions for my new setup, and/or possible hp numbers, and 1/4 miles numbers too. thanks a lot everyone!

 

I'd go with at least hyperutectic pistons over cast ones.

 

should be high 12's i'd think.
if you're doing that much to the rear suspension, might consider spohns products as well.
maybe gas-a-just rear shocks, unless you were going for the big dollar ones.
is it a roller block?

 

all the things i've listed i currently own, but have yet to install, well except for the heads and the intake, but i'm set on getting the intake. the heads im not too sure about. no its not a roller block. i cant go with hyperchenetic b/c im using what i already have. i have another motor though and it has .030 over pistons in it too, but im not sure what kind of pistons are in it.

 

here, this site is accurate:

United Engine and Machine Co.

Now that's with a lot of assumtions so.... Deck height is quite crucial

 

awesome sonic, thanks a LOT. that sounds like its right, so about 10:1

 

for example though, I opened up my 58 cc heads to 64cc's, which is the same volume as a closed chambered 350 head, but then had the block decked to .015", and have the exact same CR. So those two factors have a fairly equal effect.
I just used the stock .025 piston depth, and added .020" which is what most aftermarket pistons have on them (lower pin height, to make up for the block being decked during rebuilding, which is normal...), and guessed at .045" Still a guess. before you buy heads, when you have the motor semi apart, (heads off) measure your deck height.

the cam you want (voodoo, ~230duration) sounds like the 60103, 227intake, 234exhaust @ .050. That's the cam I just tossed in my motor. with 305 heads and flat top pistons. (similar combo eh? )

 

oh man, really???? thats crazy. what intake setup are you running???

 

mines a budget build, performer RPM spreadbore 7103 (I think), with stock non-cc q-jet. It'll scream, may1 is deadline.

 

thats carb right haha, sorry
what power are you looking to make? also, what other work did you do to those 305 heads (i assume they are 305 TPI heads, the same ones i have)

and yes, that is the same exact cam i have

 

yep, same stock carb that came on many GM motors over the years. not the computer controlled style that came on the 3rd gens (except in canada, hence...)

i'm hoping 350HP at the crank. i'm at a high altitude though, so that has to be factored in there. i'll probably dyno it mid may after i've got it all dialed in.

416's are the perimeter bolt version of the 081, for the '82-'86 305s, then they went to the 081s. same heads though basically.

I ported them up really well (I hope), put in screw in studs, 1.6 rockers, etc.

 

wow, but you made them 64cc??? crazy.

what would be better, or would they be relatively the same:

flat top pistons with 64cc heads or
dished pistons with 56cc heads

(both setups make the same compression)

ps
plz check out this thread, i need some help https://www.thirdgen.org/forums/tech...ease-give.html

 

it's not that hard, after deshrouding for 1.94 intakes (oh yea, did that too), and sanding and polishing the chambers, bam 64ccs. My machinist told me it wasn't possible too...?

pretty close to the same. The 64 cc heads might be more useful to re-use down the line though. oh yea, flat tops are better for flame travel and quench, then factory style dish pistons, unless you're talking about reverse dome, those are nice. ok, so the first one.


and no way i'm touching that thread. You have a good plan, I think you're on the right track, but it's more of a personal opinion based on what you like, and a thread based on opinion will just lead to an arguement. Good luck.

 

haha true, i just wanted to see what people thought thanks though