241 head on 408ci
On The Tree
Joined: Jan 2010
Posts: 110
Likes: 0
From: west coast
Manley Forged -2cc Flat Top Pistons - 3.905" bore
Stock GM 3.622" Stroke Crankshaft
Forged 383
Manley Forged -2cc Flat Top Pistons - 3.905" bore
Scat 4.000" Stroke 4340 Steel Crankshaft
i think they are the same size piston but then again those are forged kit's from SDPC
383 for me now! it's only $300 more so why not right?
Last edited by 1slowfbody; Feb 24, 2010 at 06:54 PM.
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TECH Addict
Joined: Sep 2009
Posts: 2,481
Likes: 5
From: PA/MD
If you want to stay N/A with 10+:1 compression stay away from the 317 castings, they are the same as the 241s but the chamber is opened up bigger to 72cc where the 241s have a 66cc chamber. You have to take too much "meat" off the face of the 317s and the face will be too thin and also might run into intake fitment issues if you mill too much off. For a finish cheap good ouut of the box head look at the Patriot 2.5 ls6 heads, or pickup a used set of 243s and get the ported/ milled.
If you have $2,500+ to spend on heads go for AFRs or Trickflow heads...not sure about the AFRs, but I know with the TFs you also need to buy roller tip rockers.
If you have $2,500+ to spend on heads go for AFRs or Trickflow heads...not sure about the AFRs, but I know with the TFs you also need to buy roller tip rockers.
TECH Addict
Joined: Sep 2009
Posts: 2,481
Likes: 5
From: PA/MD
If you want to stay N/A with 10+:1 compression stay away from the 317 castings, they are the same as the 241s but the chamber is opened up bigger to 72cc where the 241s have a 66cc chamber. You have to take too much "meat" off the face of the 317s and the face will be too thin and also might run into intake fitment issues if you mill too much off. For a finish cheap good ouut of the box head look at the Patriot 2.5 ls6 heads, or pickup a used set of 243s and get the ported/ milled.
If you have $2,500+ to spend on heads go for AFRs or Trickflow heads...not sure about the AFRs, but I know with the TFs you also need to buy roller tip rockers.
If you have $2,500+ to spend on heads go for AFRs or Trickflow heads...not sure about the AFRs, but I know with the TFs you also need to buy roller tip rockers.
TECH Resident
Joined: Jan 2009
Posts: 873
Likes: 1
From: oakland, ca
If you are asking simply will the 241s work, the answer is yes..will they work well thats another subject..I would go with a minimum of stage 1 ls6 prcs.. But thats just my opinion..if you are strapped for cash try to find a used set of 243s they should get you going in the right direction.
On The Tree
Joined: Jan 2010
Posts: 110
Likes: 0
From: west coast
lol i'm just goin off of what the SDPC site says! anyways i'm goin with the 383 kit from them with a callies crank, flat top pistons but i'm not sure what rods i'm goin with yet because from what i've been told I beam rods would work great for me if i was goin with the m112 but now that i'm goin with a larger roots style i have to upgrade to the H beam rods, I beams are good for up to 650 crankHP and with the new blower, heads and blower cam i should be well above 650 at the crank . . . i might be above 650 at the wheels lol
TECH Addict
Joined: Sep 2009
Posts: 2,481
Likes: 5
From: PA/MD
so the 241 works! im using those heads for now intul i save up for some l92,i know those 241 are not gonna give me too much top end but its just to get the car going and have a little fun with it.....
I loved my 241's that were only pocket ported on my '02 WS6 A4. They only flowed about 260 to 265 cfm maxed out and with a Comp. 216/220 cam and FLP's w/Borla CB, and Vig3600 my WS6 ran consistant 11.78 to 11.81 times with stock gears in the stock 10 bolt. Most were surprised by my times in a full weight car. I only hope i get the money to have my 241's reworked with similar cam size, header and CB and run high 11.6's on my '02 SS A4. If ported right i don't see why 241's wouldn't treat you right. Best of work on your setup.
TECH Addict
Joined: Sep 2009
Posts: 2,481
Likes: 5
From: PA/MD
I loved my 241's that were only pocket ported on my '02 WS6 A4. They only flowed about 260 to 265 cfm maxed out and with a Comp. 216/220 cam and FLP's w/Borla CB, and Vig3600 my WS6 ran consistant 11.78 to 11.81 times with stock gears in the stock 10 bolt. Most were surprised by my times in a full weight car. I only hope i get the money to have my 241's reworked with similar cam size, header and CB and run high 11.6's on my '02 SS A4. If ported right i don't see why 241's wouldn't treat you right. Best of work on your setup.
