Kennedy98z28

iTrader: (3)

My factory motor went south at the track. I am looking to buy a 408 this winter. How much hp and tq are you putting down? What size cam are you running? The car is not a daily driver either. I have done a ton of searches.

Z'mnypit

iTrader: (58)

FFHP is building mine, obvisouly no dyno #'s yet but will soon come. The cam is a custom grind cam, 244/248 .612/.615 113lsa. Im thinking maybe around 475hp NA and 600hp or more on the jug. The CR is right at 10.7-1, & topping it off is a set of Patriot Stage III LS6 heads. If you do a search you'll find the flow #'s I posted.

Kennedy98z28

iTrader: (3)

What intake are you going to use?

Brandon Boomhauer

iTrader: (10)

the FAST 90/90 is the setup to run now, unless youwant to go with a carb style setup.

Zmnypit, that cam and a half decent set of heads should put you over 475 no problem.

Z'mnypit

iTrader: (58)

Im going to run the LS6 intake, Ill fork out the money for the fast later.

Brandon- I was try to lowball my estimates, that way it didnt seem to drastic.

DAPSUPRSLO

iTrader: (14)

On a motor that does not see over 7000rpm with a hydraulic cam I'd definately stay with the fast 90/90 combo. Now if you've got a solid with .700" and up lift and over 7500 rpm now we're talking carb intake

Shane_G

iTrader: (6)

Texas Speed.

Elite_Hot_Rod

I'd build it myself and use the money I saved not having a shop assemble it for me to buy the best internals possible. Buy a new 6.0 ltr block and a Lunati Pro Billet rotating assembly and find a good machine shop to do the balancing, get a cam and a good set of heads and put it together.

VINCE

iTrader: (1)

Check the signature..

Kennedy98z28

iTrader: (3)

Anyone else?

ArcticZ28

iTrader: (14)

HPE built mine. It actually just arrived. I went with them because of recommendations and talked with Erik for a while, who definitely knows his sh*t. HPE also does their own machining/building in shop, which not many others do. It's all up to you, I just felt most comfortable with them.

WS6 #3392

What size of cam and which heads did you go with?

2001 Pewter WS6

iTrader: (43)

I did !!! I had a local machine shop do the short block (crank-rods-pistons) and I assembled the rest. Are you close to PA?? The shop I used was about 30 minutes from Morgantown WV.

Elite_Hot_Rod

Your set up is just about the same as mine, what kind of power does it make?

mikemodano9c

compression seems a little low?

Bryan @ Speed Inc.

iTrader: (19)

i think the fast 90/90 still outflows the carb intake. i could be wrong though. i saw some magazine build up an iron block 402 w/ a huge turbo and said they originally put the carb intake on w/ efi but got better results with the fast 90/90.

Bryan @ Speed Inc.

iTrader: (19)

not if he got the 68cc chamber heads. that's where my 402 sits. 10.6-10.7

Z'mnypit

iTrader: (58)

My heads have 62cc chambers. The pistons are -15cc. I plan on spraying the motor & didnt want a real high CR. I know there have been guys sprying on 11.3/11.5-1 but I didnt even want to think about doing that. Not saying its a bad thing. Plus, I could always have the heads milled if I want to change it up a bit.

ArcticZ28

iTrader: (14)

I'm using a custom Futral 244/248 .635/.627 112 +4 cam. However, my money tree was recently cut down, so I'm using the stock 6.0 heads from my old 375 engine.

DAPSUPRSLO

iTrader: (14)

Wen both are ported properly there is no comparison, especially in the higher lifts areas where any lsx style manifold really limits the true potential of a head. I think you're right about the gmpp intake though, I believe the fast is superior up to about the .550" or so area, then it's all gmpp.