SteelmanLS1

iTrader: (1)

Putting a 408 together, block is from a 02 Chevy 2500HD 6.0L Iron block.

Eagle Forged Crank 4.000
Eagle H-Beam Forged Rods
Arias Pistons 4.030 -4cc Flat top
TSP 248/254 .615/.622 Cam
Ported F.A.S.T. 92mm Intake/92mm N.W. TB
Bigger Injectors /w Better FP
Double Roller Timing Chain
Harland 1.7:1 Roller Rockers
Hardened Pushrods
LS7 Lifters (Maybe Morrels not sure yet)
LS6 Ported Oil Pump


Now I just need heads.. I want the MOST HP/TQ I can get out of this motor since I am spending so much money, I want to do it right the first time... This car is not a DD, but more of a Weekend Warrior.. It does get drove daily, but I have other vehicles...

2001 Pewter WS6

iTrader: (43)

Mill the heads to 64cc you will be around 12:1 cr. I run mine on Sunoco 93 with zero issues... except traction...

SteelmanLS1

iTrader: (1)

I only have 91 octane around here.. Do you have a AIM so I can talk to you a little about your motor?

njc.corp

the tfs 225 would do the job well?

SteelmanLS1

iTrader: (1)

Yes probably would

transAm-98

iTrader: (1)

I did TFS 225's. in theory the 225's should help keep the tq up versus the 235's. but people have made good #'s on both. Don't be afraid the bump the compression up either, I'm also on 91 onctane.

SteelmanLS1

iTrader: (1)

Whew nice numbers.. Can you share with me a little bit more about your motor and what cam? How streetable?

SteelmanLS1

iTrader: (1)

TF 225's sound like a good head... Do they flow better than the AFR 225?

transAm-98

iTrader: (1)

I'm not gonna get into TFS vs AFR because it's a never ending argument. But both are great performing heads based on who owns which

My setup is an LME 408 with TFS 225's running 11.9:1 comp ratio. Cam is a custom grind 246/250 .610 lift with a 115* LSA and a locally ported FAST 90 on top. I'm still running some old 1 3/4's headers but we plan on playing with that this winter. There's nothing really wild about the setup it's just really well matched combo.

Jason 98 TA

iTrader: (4)

Don't forget the new PRC 237cc cylinder heads. They're the best bang for the buck & flow 340+cfm while still being stock rocker arm friendly.

03 BUSA

iTrader: (25)

I voted TFS, I feel either the 225 or 235 would be just fine. The 235 would allow for bigger ci in the future. I too would look at compression, head gasket thickness and such.

knappbunch

put the 235's on my 402 and it made 516hp with 490 torque at like 4800 with alot left in the tune we will be pulling it out soon hopefully.

03 BUSA

iTrader: (25)

^^^^Wow, that is not a bad tq number at all for a set of 235's. Give us some other details on the car for comparison, auto/M6 compression, cam style solid/hyd.

knappbunch

fresh build with fast 92/92, tfs 235, harland sharpe rockers, 11.5.1 comp., h beam rods diamond pistons , ls7 lifters, double roller tc, 4340 crank, comp cams custom grind will have specs in a few days, A4 with 3300 stall, 3.73 gears, still lean up top have the walbro pump but we are trying to get the racetronics kit on it after christmas. also has a bad 02 sensor.

03 BUSA

iTrader: (25)

That is impressive, my 427 with L92 topend and G5X3 cam only made 535 and 525 tq. Amazing what good parts will do. Good job man.

SteelmanLS1

iTrader: (1)

Thats good numbers on a A4 whew

gtodoug

iTrader: (1)

I'm making 530/500 on my little 403 from LME.

11.8SCR
8.75DCR
AFR 225's
LG G5X4
1 3/4" LG Pro's
Stock exhaust
ported fast 90 setup

03 BUSA

iTrader: (25)

What do you mean stock exhaust?? That is insane.

SteelmanLS1

iTrader: (1)

Remember guys dyno numbers aren't EVERYTHING.. If a customer put down 530/481 with a steel driveshaft and a ford 9" on a dyno... with the factory 10 bolt and stock driveshaft he is going to put down Way more 560-570/510 range.

So make sure and list your drive line as well

Shawn @ VA Speed

iTrader: (3)

any of the 225cc or bigger aftermarket heads will get the job done,the key is to get the entire combo to work well together,i'll tell you a big secret-shelf cams only work in one engine great,everything else they work ok in,get a custom grind for your combo.