just a thought for a 415 sb...

[Yellow79]

just throwin this out there as an idea. what do you all think? 400 block, 4.125 bore, 3.875 stroke(414.3 ci) forged rotating assembly afr 210 aluminum race head, 2.080intake 1.60 exhaust 10.5:1 compression XR282 roller cam edelbrock dual-plane manifold crange gold race roller rockers dd2000 rates it at about 530 ft-lbs and 500 hp. i cant find a way to tweak it any further. any suggestions? :seeya Edit : shooting for a naturally aspirated engine without a sky high compression btw [Modified by Yellow79, 6:50 AM 4/12/2003]

[VETDRMS]

Sounds pretty good to me, here is my 406:

AFR 195
10.5:1 CR
Edelbrock Victor Jr.
Mighty Demon 750 MS
XR288

548hp, 521ft/lbs

The 210's would probably appreciated a bigger cam, and a single plane intake. :cheers: If your after torque the 195's are good.

[QuickVet]

Sounds pretty good to me, here is my 406:

AFR 195
10.5:1 CR
Edelbrock Victor Jr.
Mighty Demon 750 MS
XR288

548hp, 521ft/lbs

The 210's would probably appreciated a bigger cam, and a single plane intake. :cheers: If your after torque the 195's are good.

:iagree: those heads need a better intake and cam

[korvetkeith]

More cam and single plane? What dia. headers and what size carb were those numbers with? You'll want like a Holley HP 850 and 1 3/4" headers.

[Yellow79]

that was with a 850 dp, and "large tube headers with mufflers" ala dd2000
with a single plane manifold it jumps to 525 ft-lbs and 537 hp... any suggestions on that bigger cam and where i could find a file for it?

[korvetkeith]

Try out the 288 and the 294, are you using flow numbers for the Competition or Race Ready porting? Are you using 1.6 roller rockers. If your running 400 sb, you'll have atleast a 4.155" bore with the .030 over for the rebuild. If you're using a forged parts you could also get a 4" stroker crank for just as much as a 3.875, that would give you a 434. :D


[Modified by korvetkeith, 4:27 PM 4/12/2003]

[LD85]

here is my combo:

400 SBC 4.155 Bore
11:6-1
.225 intake /.233 exhaust @ .050 Gross lift .541/ .526
Comp Pro Mag 1.6 RR and Retro Rollers
Dart 215CC Bowl polish, gasket match heads 62 CC with 2.05/1.6
Miniram II 1206 Gasket
BBK 1000CFM 58MM Tb
3.75 std 400 crank
Hooker 2151-1
Hyperutectic -6CC
Forged I-beams 5.7
Centerforce DF II
Walbro 340, 80/PSI, w/24 # injectors
4+3 tranny w/3:07 Rear Gear
All ARP

DD2000 says:
505-HP @ 5750
525-Tq at 4500 :thumbs:



[Modified by ld85, 3:01 PM 4/14/2003]

[81vette]

Mines in my signature.

mark

[Yellow79]

definitely some monster small blocks running out there :thumbs:
i cant go with a 434... nice thought but even a 415 is pushing it without a goood aftermarket block. i think the best combo ive come up with has about 520 hp/tq. it doesnt have the highest peaks, but it has a damn well near flat power curve... at 2k it starts at 460 ft-lbs and 218 hp and goes up to a peak of 520 ft lbs and 523 hp. for a streetable motor it sounds good... and with a power curve like that it would accelerate like a bat out of hell. happy driving! :steering:

[HWoods]

ld85, I would think you are going static with the 24 pound injectors, not sure, but maybe they are stretched to make that kind of power, and 80 psi?

[LD85]

ld85, I would think you are going static with the 24 pound injectors, not sure, but maybe they are stretched to make that kind of power, and 80 psi?

Corkvette runs 24# and SKI_DWN_IT (11.134 1/4 mile at 11.6:1) does too. You are right the safe limit for the 24# injectors, I've been told is 60-PSI. IF I need new injectors I will get them but I will wait and see.

Also I have dialed my compression back to 10.5:1 for a more streetable combo.

494 HP @ 5750
509 TQ @ 4500