What cam for a 408 in my heavy ass truck?
09-24-2005, 03:09 PM
#22
Originally Posted by 1slow01Z71
Im thinkin 225-250 shot. The first stage will be my ny-trex kit with a 150 wet shot then a second stage dry shot with 75-100. I will spray 150 out of the hole and then when I hit second gear turn the second stage on. I am going to run a window switch so I dont fry my itty bitty 60e. 
It has 2 grand of hard parts in it so Im hoping it will hold up fine. Im hoping for 500hp on motor alone and traction will only be the push of a button away. 
It has 2 grand of hard parts in it so Im hoping it will hold up fine. Im hoping for 500hp on motor alone and traction will only be the push of a button away. Philip S.
09-24-2005, 03:14 PM
#24
Originally Posted by 1slow01Z71
Goodyear AT/D2 32"ers all around they will be fine hopefully. If not Ill start researching tires.
09-24-2005, 04:13 PM
#25
Tin Foil Hat Wearin' Fool
Thread Starter
iTrader: (36)
Join Date: Oct 2004
Location: Austin, TX
Posts: 23,027
Likes: 0
Received 0 Likes
on
0 Posts
I will take some videos of it mainly kicking MjHoawrds *** up and down the 1/8th mile. Im thinkin 4wd burnouts shouldnt be a problem since with a stock engine, tune, exhaust, intake, 3000 stall and a 100shot it would psin all four for about 4 foot. I hope that it will spin em through first in 4hi.
Im thinkin 4wd burnouts shouldnt be a problem since with a stock engine, tune, exhaust, intake, 3000 stall and a 100shot it would psin all four for about 4 foot. I hope that it will spin em through first in 4hi. 
09-25-2005, 09:46 AM
#28
Tin Foil Hat Wearin' Fool
Thread Starter
iTrader: (36)
Join Date: Oct 2004
Location: Austin, TX
Posts: 23,027
Likes: 0
Received 0 Likes
on
0 Posts
I think I want to go a little bit bigger than that though. It would produce alot of tq down low but Im not sure it would breath good enough up top once I get my stage 2 heads on it and ahve the idle like I want too. I want my 408 to idle like an ls1 does with about a 232 cam in it. I liked the way my 5.3 idled with a 222/224 on a 112lsa.
09-25-2005, 11:57 AM
#29
TECH Senior Member
Forget the theory of high peak HP with that much mass to move.
You want a cam that will produce massive amounts of trq early in the band.
Cam idle is relative to how much overlap it has (lope), not to how big it is.
A 408 set up for an F-Body,is not the same as a 408 for a 6K lbs truck.
Strage 2 heads doesn't say much, on average they only have 2.02 intake valves, not what you would call massive air movers.
You want a cam that will produce massive amounts of trq early in the band.
Cam idle is relative to how much overlap it has (lope), not to how big it is.
A 408 set up for an F-Body,is not the same as a 408 for a 6K lbs truck.
Strage 2 heads doesn't say much, on average they only have 2.02 intake valves, not what you would call massive air movers.
09-25-2005, 03:27 PM
#30
Tin Foil Hat Wearin' Fool
Thread Starter
iTrader: (36)
Join Date: Oct 2004
Location: Austin, TX
Posts: 23,027
Likes: 0
Received 0 Likes
on
0 Posts
Everything you said is true. Im am not sure what the exact specs are on the heads that Im going with but they are the largest that will fit in a 6L head. They are cnc ported and tested on a flow bench and are damn nice. As far as having massive amounts of torque down low Im not too worried about it. If I am going to race somebody and I think I need the extra kick Ill hit the bottle opener and have an extra 150 on tap and moer than that in torque and then the second stage will always be on stand by if needed. I want a cam that is going to be jsut small enough not to make it a pain in the *** to drive daily and I think the cam Im tlaking about is the one. Yes you car guys can get awya with a much bigger cam due to your weight. My truck weighs in at 5400#s or so with a full tank of gas.
So predator if you were doing this build and wanted to achieve what I have outlined what cam specs would you go with?
So predator if you were doing this build and wanted to achieve what I have outlined what cam specs would you go with?
09-25-2005, 03:34 PM
#31
TECH Fanatic
iTrader: (2)
Join Date: Dec 2002
Location: Orange county n.y.
Posts: 1,107
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by destroyerSS
I would say something in the low 240's with around 615 lift on a 112lsa. That way you'll get some lope but it will still drive nice too 
09-25-2005, 03:39 PM
#32
Tin Foil Hat Wearin' Fool
Thread Starter
iTrader: (36)
Join Date: Oct 2004
Location: Austin, TX
Posts: 23,027
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by destroyerSS
so you want a cam that will sound like a 230 ish cam in a 346 and still give you top end power
The cam that Im tlaking about is basically that but jsut a bit more conservative.
09-25-2005, 03:45 PM
#34
A nice mild one. i pulled a 427 out of Camaro one time and put it in my 73 4X4 Truck. Belive me when I say it will calm the most evil motor you got. The Camaro would turn 10.58's with the crane cam in it. I went with a 280 durtation comp. cam and never regreted it. The torque with a big bore motor with a mild cam is unbelievable. Now everybody will disagree with me I'm sure but remember gas prices aren't going down . And you never pull a boat behind you at the drag strip.
09-25-2005, 03:51 PM
#35
Tin Foil Hat Wearin' Fool
Thread Starter
iTrader: (36)
Join Date: Oct 2004
Location: Austin, TX
Posts: 23,027
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by destroyerSS
If you want to go alittle smaller go with something like a 238/243 61x/61x 112. This will be a very tame cam in a 408
09-25-2005, 04:43 PM
#36
If you look at what Tony Mamo posted in the Dyno section, he ran several cams in a 383. A 234/238 put down similar torque to the 224/228, but provided another 25HP or so up top without losing much of anything down low. With a 408, you can go 244/248 and keep a nice broad power curve that will peak around 6300-6400. Just make sure you have plenty of compression out of the 408 to keep the bottom end stout.
So, I'd run a 12.1:1 CR with a Comp Cams XE-R 244/248 .612"/.615" 114+1 LSA. Will work fine on 93 octane.
So, I'd run a 12.1:1 CR with a Comp Cams XE-R 244/248 .612"/.615" 114+1 LSA. Will work fine on 93 octane.
09-25-2005, 08:43 PM
#38
Originally Posted by 1slow01Z71
What comperssion ratio is the largest I can get away with on 93 octane I refuse to run a race gas mix.
Philip S.
09-25-2005, 08:57 PM
#39
Tin Foil Hat Wearin' Fool
Thread Starter
iTrader: (36)
Join Date: Oct 2004
Location: Austin, TX
Posts: 23,027
Likes: 0
Received 0 Likes
on
0 Posts
We will see I need to look into a progressive controller with the timing retard and window switch all in one. I saw the money maker direct port setup nitro dave posted up[ and it has the wheels turnign in my head once again so I may go direct port with that setup with a fast 90mm intake and tb.
