408 stroker hp?

[swinging74]

I'll be building my first smb and i was wondering what you guys think the hp i could get from my set up,
-seasoned 360 block
-scat 408 stroker rotating assembly
4.030 bore, hypereutectic dished pistons, 10:1 compression,4.000 stroke crank,6.123 rod length
-INDY LAX heads, 3 angle valve job, 1.92x1.625 and hard seats,5/16 stainless valves, .525 lift spring valves, 7 degree locks and viton seals, chrome moly retainers, cast iron valve guides, 2.02 intake valves, mill cnc and correct chamber, full port and polish, intake port volume 179cc
-big mutha thumpr hydraulic flat tappet cam, lift .507/.494, duration 295/312, rpm range 2500-6400
-comp aluminum roller rocker arms, 1.6 ratio
-mopar performance single plane aluminum intake
-750cfm mighty demon carb, Billet Baseplate with new Idle-Eze,billet metering blocks, Patented Concentric Venturi, nochoke horn, Replaceable Air Bleeds, Replaceable Idle feed restrictors, Mechanical Secondaries
Patented Large View Sight windows, Dual inlets, Metering blocks with tuneable jets(Primary and Secondary circuits), 4 Corner idle adjustability, Built-in Power Valve blow out protection, Vacuum ports - 2 constant, 1 ported, Most common tuning parts interchange from other manufacturers(Jets, Power Valves, Squirters)

If you need more info please just reply and ill respond.
Also ill be running a tci 904 automatic trans reverse manual valve body and 2800 stall

 

[CUDACOX]

I'll take a stab at it and say... 425-450 hp.

 

[412 Stroker]

First you state: 1.92x1.625 and hard seats
then you state: 2.02 intake valves so which is it??
my guess would be 450 -475hp with the 2.02's

 

[flyfish]

Welcome to the site, probably about 450-470hp.

 

[swinging74]

sorry its the 2.02 intake i was going through my pricing and forgot i went for that option, so mid 400's is what you guys think?

 

[CUDACOX]

sorry its the 2.02 intake i was going through my pricing and forgot i went for that option, so mid 400's is what you guys think?

Sounds about right.

 

[swinging74]

the car im putting it in is gonna weigh some where around 4200, 3.91 posi, 10.5 et street slicks, caltrac suspension traction bar mono leaf adjustable shocks, what do you guys think my 1/4 mile time is gonna be, i was hoping to run high 11s

 

[CUDACOX]

That might be a problem because of the weight.I'm sure someone with more racing experience will chime in..

 

[CUDACOX]

the car im putting it in is gonna weigh some where around 4200, 3.91 posi, 10.5 et street slicks, caltrac suspension traction bar mono leaf adjustable shocks, what do you guys think my 1/4 mile time is gonna be, i was hoping to run high 11s

What Mopar are you dropping this Sb into that weighs 4200?

 

[swinging74]

it may be under 4000 i havent decided how much interior ill be ripping out yet

 

[Mad Dart]

I think the cam is a bit small for a stroker. I say 450ish HP.

Use these heads...... and a lil more lift with a different cam and I say it will make 525HP.

These heads are ready for a .600" or more camshaft. Why limit yourself on lift at .525 when you are buying this stuff all new??

[B]http://immengines.com/rhsheads.html[/B]

 

[swinging74]

What Mopar are you dropping this Sb into that weighs 4200?

74 swinger, door tag says it weighs 4500, im getting rid of bench seats front and back putting in buckets and an aluminum panel to go over the opening to the truck, putting a 16 plastic fuel cell in trunk, doing an aluminum dash, light weight steering column, aluminum wheels, tubular control arms, 4 point roll bar, no accessories on the motor besides alternator

 

[CUDACOX]

4500!! Not for a 74 swinger.. subtract at least 1000 lbs..

 

[swinging74]

I think the cam is a bit small for a stroker. I say 450ish HP.

Use these heads...... and a lil more lift with a different cam and I say it will make 525HP.

These heads are ready for a .600" or more camshaft. Why limit yourself on lift at .525 when you are buying this stuff all new??

http://immengines.com/rhsheads.html

I've always liked indy heads and have had buddies that said they perform well but ill definately take a look at these heads, they do seem to flow better and have more lift

 

[swinging74]

4500!! Not for a 74 swinger.. subtract at least 1000 lbs..

your think it weighs less?

 

[CUDACOX]

Never heard of an A body weighing that much unless it was going to the crusher and someone filled it with concrete! lol.. My 68 Cuda weighs in around 3200 lbs I think..

 

[swinging74]

Never heard of an A body weighing that much unless it was going to the crusher and someone filled it with concrete! lol.. My 68 Cuda weighs in around 3200 lbs I think..

well i guess dodge lyed on my door tag aha ill have to get it weight then cause if its weighing around 3500 with the motor ill be building ill be stoked

 

[CUDACOX]

well i guess dodge lyed on my door tag aha ill have to get it weight then cause if its weighing around 3500 with the motor ill be building ill be stoked

3500 lbs with your motor should get you high 11's..no problem

 

[crackedback]

I believe the door tag is max weight for the car, not what it actually weighs. Shipping weight on a 74 2 dr hardtop was ~ 3200#. Figure it's going to weigh in at about 3400-3500 with no weight reduction program.

The engine should make 450hp and that's good for a mid 11 if the car leaves pretty well. Poor 60' = slower 1/4 times. Converter won't be your friend here.

If you haven't bought anything, you may wish to rethink some of your choices for components.

 

[swinging74]

I believe the door tag is max weight for the car, not what it actually weighs. Shipping weight on a 74 2 dr hardtop was ~ 3200#. Figure it's going to weigh in at about 3400-3500 with no weight reduction program.

The engine should make 450hp and that's good for a mid 11 if the car leaves pretty well. Poor 60' = slower 1/4 times. Converter won't be your friend here.

If you haven't bought anything, you may wish to rethink some of your choices for components.

what componets do you think would be better, this car isnt strickly drag car it will also be a weekend cruize in/car show car, and maybe some grocery getting

 

[crackedback]

Who's doing the porting on the RHS X heads. Porting may not be necessary at all if the goal is not that high on the HP scale.

If you are running stock rockers, then the cam needs to be somewhat tame. See aftermarket arms, not a big deal to up the camshaft lift.

Pick a goal for HP and build to the goal. If you have 450 in mind for a 4" arm engine, it's not hard to get there.

I'd run a hyd Voodoo or Comp HL series over the hyd thumpr line.