69blackwhss

iTrader: (9)

hey i have just got some 241's an i was thinkin bot geting them ported dan wantin to know if its a good idea are not. an whats the hp an tq gain from getting them ported over stock? also i have the fast 92mm would anybody know what is the the stock hp an tq on a stock fast 92mm an then what is the hp an tq if the fast 92 was ported. thanks for any help guys.
jason

brian_rs/ss

meh...i would spend my money on a set of stock 243's...they are just an all around better head.

Titanws6

iTrader: (35)

x2...port the fast and get the 243s. This along with your bolt-ons and exhaust will help determine just how much you will gain.
There is a 243 head package for $900 in the classifieds, it inlcudes all gaskets, hardware, lifters, good deal IMO. Just needs new springs and a cam

brian_rs/ss

^yeah i saw that too. that would be a good package for you OP.


and maybe sell those 241's? grab a decent cam and spirngs? trust me the classifieds can help you out a lot. i know for sure there a bunch of good cams floating around the classifieds.

69blackwhss

iTrader: (9)

hey guys thanks i have the 853 heads now i bout the motor for a ls1 swap in a 69 camaro. am goin with the trex cam an the 660 lift springs an harden push rods an the nick will. tb 92mm with the 241's an fast 92mm intake an a hptuner an 42# injec. i just want 420hp an 400tq at the tires if more would be nice just dont got the money to get the 243 heads. i got the 241's for $150 from the classifieds an the intake from there too.
do u guys think that i need the portin work done to get my hp an tq goal?
i have a big block 454 now an its to much tq on the dyno its 386hp an 593tq an thats with out the 100 shot of no2 just to much tq. lol an plus the driveable of the ls1 is much better an gas miles an lighter like 300 are 400 lbs lighter.

brian_rs/ss

first off you shouldn't have bought a t-rex cam if you want driveability, especially with 241 heads, a high lift high duration cam like that needs really good flow to utilize its potential(241's aint gonna cut it). secondly i would have gone with a single plane intake...but thats just me. thirdly to effectively port 241's it's going to cost you....so why not just buy 243's? you say you don't have the money but you insist on wasting money by slightly porting 241's? when stock 243's can be had for about 400-450 and they flow better with less turbulence and have a slightly higher comp ratio. so to achieve the same thing with 241's would cost you more...trust me sell the 853's, sell the 241's, and buy 243's. with all the money you spent in other places why in the world would skimp on the heads? i don't get it...

Jordan S.

iTrader: (17)

I had ported 241's and didn't like them. I would go with a stock 243 head. A small motor needs small intake runners. Hogging out a 241 will make a stock ci motor lazy unless its got a power adder.

69blackwhss

iTrader: (9)

hey ok i got ya good idea just hope i can find someone who will buy the heads now i was just goin to run a setup like my buddy has an he is runin 10.20 with just the intake an cam setup an tunin an supe. work done

brian_rs/ss

yeah i would say put em up on the classifieds(your local classifieds too) with pics and religiously bump till u get a buyer. you also might want to look into finding other crap you can sell, anything somebody might want. and try to sell it all at the same time. also i would say hold off on porting the intake for now. yes its a good idea, but i would say 243's are priority #1.

Titanws6

iTrader: (35)

I just installed my stock 243s and put down 417/397 at the rear. My goals were 420/400 as well. I did this with a custom grind cam and stock maf, stock ported TB, stock LS6 intake, 30# injectors and full exhaust. You are heading in the right direction, but the 241s will hold you up. And like the others have said, it will cost you more to get a good port/valve job on them than to just buy the 243s.
Plus, down the road, you can always port and mill the 243s for even more flow and compression. I paid $650 for my 243s with the sodium valves and already installed upgraded springs. You COULD do the 241s stock to get close to your goals, but then you'll need a BIG Lift cam to get there with horrible streetability. From what I have learned on here, HEADS are where the power is and goals in mind, you wanna do it right from the get go.

69blackwhss

iTrader: (9)

ok i tryed to put the old heads on here in the classifieds but it wont let me i read something on here i have to be a member for 6 months are post 50 postes. so i got a few to go then lol are do u know away around this hold up buddy

69blackwhss

iTrader: (9)

man thats great u hit ur goal i hope to do the same thing in the winter lol am goin to try an sell my heads 853's an 241's now an the stock intake an tb, an hope i can get a good deal on the 243's thanks jason

orangeapeel

iTrader: (18)

FWIW A set of properly CNC'd and blended 241's will be about like a set of ported 243's. Its the same program run on the CNC. The CC will be the only small difference. If you get them milled then it wont matter.

And again, if you get the right person to tune your car it doesnt matter what kind of cam you have within reason. Most of these shelf grinds can be tame enough to DD with no surging/bucking/stalling. Granted gearing or converters will play a factor in what is useable.

OP - You are the first person I have ever heard complain about having a BBC with too much torque.

69blackwhss

iTrader: (9)

ya ya i know but when u brake a 2500 dollar tko 600 with in 25,000 miles come on lol i put down just over 682 tq at the wheels with the no2. an i just wanted to upgrade to fuel injectin an get better gas miles. u know an the motor will be bot 400 lbs lighter then the bbc i have now
am going to keep the bbc for a 66-67 nova for my dad when we find one that is for him.

69blackwhss

iTrader: (9)

what do u all think the 853 heads will go for with out the rocker arm? an then the same on the 241's heads. also the stock ls1 intake with the fuel rail? an all the egr stuff, an the stock manifold? all the parts i have has less then 37,000 miles the but the 241's have 31,000 miles on them. thanks for the info guys

thewholefnshow1

iTrader: (2)

I'm not head expert but if 241's are ported right and milled they can be a good head. Look at the sigs and that was before the true duals that was with kooks catted Y-pipe.

blue98Z

iTrader: (29)

Agreed!!

I have a set and have talked to TSP about a 2.5 P&P and was told they would flow right with the 243's. This also included the upgraded valves to 2.02 and 1.57 and milled to a 62cc from the 64cc that they are. All for $850. So why spend $900 on a set of stock 243's when you can spend less and get the same. You add the $150 you have spent already to the $850 and thats $1000 compared to $1750 if you went with the 243's. The savings would buy those injectors you'll need and pay for the tune.

There are plenty of guys on here making good power with p&p 241's so don't let the hype fool you. Stock for stock the 243's are better, but once work is done there isnt a difference in either. Just my .02

69blackwhss

iTrader: (9)

thanks buddy for ur 2 cents lol that a old one. am lookin for the 243's an everone wants 500-700 for there used heads so if i can sell the 241 guess i stay with them u know i aint wanting to blow 300-600 dollars for 30 hp it aint that big of a deal with me i just want 420hp an over 400 tq which my buddy told me 2day with his set up trex cam 660 lift springs an hardend stock length rods an fast 90/90 an hptuner with 6speed an 12 bolt with slicks with the 241 heads stock made 457hp an 409 tq thats good for me an am goin with a fast 92/92 o be both will be runin a nick willison tb an stock maf... an same cam an valve train so i sould be rite with him i hope an using 42# injectors. ill be usin a covette fuel rail tho for the ls1 swap tho the motor will me goin into a 69 camaro ss.