85Firebird350

iTrader: (3)

Well my motor is at the machine shop so the build is starting. Just wanted to know what you guys though of this build.

400sbc bored .030 over to a 406
Callies Dragonslayer crank -3.75" stroke
Eagle SIR 5140 forged connecting rods - 5.7" rods
Speed-Pro powerforged pistons - should net 13:1 compression with 64cc heads.
Federal Mogul engine rebuild kit - Should include all the gaskets and bearings.
Cam - Lunati voodoo solid roller #60133
Heads - WP sportsman II's with some heavy porting done, valve job, SS valves, milled down from 66cc to 63cc combustion chambers, completely setup for the solid roller.
Weiend team G intake
Holley 750cfm HP series carb

What do you guys think?

stiletto

you're gonna need more than a 750 cfm carb, that will choke it up. A 950 would work alot better.

85Firebird350

iTrader: (3)

Well I have a 750 right now but I'll deffinatly be looking into a 850 or 950
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I'm torn between the Eagle 5140 rods and the Lunati 4340 street rods, theres about a $200 price diffrence but are the Lunati rods that much better?

88IROC350TPI

That cam is asininely small for a 13:1 400, extremely poor choice in my opinion...

85Firebird350

iTrader: (3)

With 1.6 rockers it'll have like .624/.630 lift, thats plenty of lift. Do you mean duration wise?

88IROC350TPI

That cam is suited for a 10.5:1 350-383 not a 13:1 400.... I'd imagine your DCR would be so high you'd have to run C16 all while losing 80+HP compared to a properly sized cam. Also, if you're buying a Callies Dragonslayer crank why on earth would you put that anywhere near a crappy 5.7" Eagle SIR rod and Speed Pro pistons?

Lastly, what do you plan on doing with this motor? with 13:1 I'd assume it's an all out drag car?

ross

I am with 88 iroc on the rod deal but hay we all have differnt budgets. I perfer to spend better money in the rods. Can some one post the cam specs?

88IROC350TPI

110LSA/106ICL
Lift: .585''/.600''
Adv. Duration: 278°/285°
Duration @ .050'': 249°/255°

Solid Roller; Rough idle. Excellent cam for Street/Strip
applications has good mid range and excellent upper RPM torque and horse
power. Needs 3200-3500 RPM stall converter, headers, 10.5:1 compression
ratio or better and 4.10 gearing.

85Firebird350

iTrader: (3)

I dont mind spending money on a proper engine thats why I asked about it. The rods most likely will be Lunati 5.7" street rods.

ross

Use a flat top piston no need for the dome dont bother cutting the heads. I would zero deck the pistons. use .038-.040 head gasket keep the cam you picked with the 1.6 rockers make sure to use a 7/16 studs for the rockers and a girdle would be nice but not a must have. Also make sure you have a 30 deg back cut put on the int. valves it will bring your low and mid lift floe #s up. And your lifts with the 1.6s will be I.624 E.640 Yes get the lunati rod the 4340 is a better material.

85Firebird350

iTrader: (3)

Would that cam be better in the 406 I already have built with 11:1 compression?

I upgraded my rods to Eagle H-beam forged 4340 rods. Theyre rated at 700 hp and 7500 rpm.

88IROC350TPI

With a true 11:1 SCR that cam would give you a DCR of about 8.8:1 ..."They" say you cant go over 8.5:1 if you plan on running 91 octane pump gas, especially with iron heads. If you live in an area with 93/94 octane you might be alright, still could be iffy.

ross

Yes if you have a short block with flat tops in it will work I would have it zero decked and debor the pistons and cyl head chambers.

85Firebird350

iTrader: (3)

Yes I have a 406 in my car with flat tops and a 406 block that I am building...hence this thread. We do have 93 octane here.