RB Big Block or Big Inch SM Block?

[77dragracer]

PAPOO
If you're running 2850-2950# with you in the car a build like mine would have you in the low 10's. If my car in good air can run 10.70's you would at least be 10.20-10.30
Nobody really builds 408's anymore and if i had to do it again i'd go bigger stroke as well,426-444
Good luck either way

[Cranky]

My first 66 383 Belvedere II was 3750 with a half tank and a pair of slicks in the trunk. All steel wheels. My present 66 Belvedere I was 3370 when I got it with a /6 and working AC but I got it down to 2950 using a glass hood, no front bumper, most of the undercoating removed and rear seat, mats and rear window crap gone. I had also done some metal removal with a Greenlee hole punch kit. A buddies 72 Demon with the carpet and ac gone was 2950. It's a small block car with buckets and console auto car w/8 3/4, no undercoating.

[projectmopar]

408 is a lil' on the small side anymore for strokers, plenty out there displacing 416-444. The 444 stuff requires a bit more work, a bit more money, is easier starting with a newer 340 block....

Have friend that has an "Indy Cylinder Head" 472" small block using Indy Maxx Alum. block (think he means the old Mega small block) and Indy light weight heads. He purchased this one a few years ago at Vegas "Mopars at the Strip" from Indy, don't think this block is available per their website now. The Indy "street" cast iron block is lighter than an old 340/360 block.

I was interested in one because of the weight savings was like 200 lb. with block and heads, plus a new tube K-member would be another 100 lb. With 300 lbs less on my car, it would be under 3000 lb. with driver. Just my two cents.

Like most I like the big block, being cheaper to build is a plus.

[hemi67s]

The turbos have some issues,,but they have come a long way. That last half of the track,,,damn!!!

[Wedge]

The turbos have some issues,,but they have come a long way. That last half of the track,,,damn!!!

I was watching some videos the other day of some turbo slant six A bodies doing the 1/4 mile in the 10 second range.

Damn is right.

[270SE]

The block is $3100 plus machining
Hughes Engines

The heads are 3535 plus they are CNC'd and that is usually $1365 to $1506
Hughes Engines

Hughes Engines

The intake is CNC ported he charges $400 to $750 for that my buddy had a Victor BB done $750 plus the intake now in this case that comes with the indy heads!

race balanced stroker kits are $2300 ish
add cam, lifters, harmonic balancer, gasket kit, timing chain cover, water pump, valve covers, push rods, oil pump, oil pan, windage tray, distributor drive, distibutor, plug wires, carburetor, headers Plus the machine and assembley work this motor goes well past $15000. as a crate as dynoed I'll bet it is closer to $20000 than $15000 if you were to say yup ship me that with headers and all
His cheapest crate motor starts at $9500 and those will be used stock blocks and it's all +++ from there!

hope the links worked

---------- Post added at 06:44 PM ---------- Previous post was at 06:29 PM ----------

So what I'm saying is a stock block 512 stroker and ported eddy heads will make 700 to 750 without breathing hard especially with CNC heads $2700 at mancinis
Mancini / Edelbrock Ported 440 RPM Cylinder Heads
stroker kits cheap everywhere
Muscle motors 525 would work good or even a 540?? all go in stock block may have to use external oiling on the 540.
Stroker Kits

Hughes is far from the cheapest anymore on small blocks, and strokers are generally a lot cheaper than that. If you stay low enough to use stock or relatively inexpensive heads it doesn't have to get much more than the heads, balanced assembly, and machinework. It's a really big plus if it's a street car because of all the little pieces of mind dealing with gas and oil today being much cheaper. MP had a crate 440/550 a couple years ago that was significantly more than you'd build a 550hp stroker for $10.5k, think it's up to $12.5 now.

Check out Muscle Motors' small block kits, about as cheap as they get these days, some very. (the kind that could use good stock heads)

This is right about the margin where you could still have a solid streetable car with decent manners and such. To pull weight down for the big block would take a bit of losing comforts or legal requirements for a street car, or building the power up would cost more money/require a less mannered engine. After tens it gets much easier to have a big block in it cause a small block would be liable to cost the same in more cases than not.

PAPOO
If you're running 2850-2950# with you in the car a build like mine would have you in the low 10's. If my car in good air can run 10.70's you would at least be 10.20-10.30
Nobody really builds 408's anymore and if i had to do it again i'd go bigger stroke as well,426-444
Good luck either way

Part of it is that a lot of the later 340s became more common to stroke, so most strokers are 416 anymore.

[dodgeboy8]

But we were pointed at this particular motor making 700 it is what it is very expensive after market block and everything for that matter! do it more like brads (77dragracer) and your in the 535 area and yes that should run mid tens in a car under 3000 lb yes there are cheaper strokers but in that motor you can bet hughes used a good one not his best it's nearly 3000!

---------- Post added at 12:08 PM ---------- Previous post was at 11:17 AM ----------

This ,motor was pointed out as a why go BB when you can get 700+ small block i pointed out what it would cost to build this particular motor
#18----- 701 Horsepower 420 Cubic Inch Small Block

if 700 is the target you will do it cheaper and easier with cast iron 440 based stoked eddy head motor.
440 block free if you have one I paid 100 each for the two I have in the garage
Stroker kit 1800 to 2200 I'd do 512 to 525
Eddy heads $1500 CNC ported $2600 (do it up front only way to go)
Solid cam lifters push rods and roller rockers $800 to 1000
oil pump $70
oil pan and pick up $100
windage tray $65 to $130 for a 4.5 one.
Crank girdle Hughes $335 comes with main studs! also gives 1/4 clearance on the windage tray so a stock one will work up to 4.25 stroke
Timing chain $100 wanta good one!
cover $45 to $100
Vibration damper $370 to $425 don't cheap out hear.
Water pump package electic $300
MSD dizzy and wires $275 or MSD 6AL $225 and wires $100
Carb $500
Intake $225
Valve covers $125
Machine work block only heads are done $600 to $800
So for $8900 to $9400 for everything new but the block machined and done but assembly carb to pan ignition and all you would have
go with a big cam and 100 cfm carb and 700 foot lb and 700 hp is easy

only going for 600 ish knock off the CNC $1200 or get a budget kit like below
lots of other paves to cut some corners to build a 640 foot bound 570 hp and that will put a 2900 lb car to 10.5 easy.
no need for the crank girdle 750 vacuum would do it hydraulic cam
Edelbrock 2087 - Edelbrock Power Package Top-End Kits - Overview - SummitRacing.com
this cam
Edelbrock 7194 - Edelbrock Performer RPM Cam and Lifter Kits - Overview - SummitRacing.com

[Papoo]

WHOA!!!! Haven't been back to this site in awhile and am VERY IMPRESSED with all the comments!!! Lot's of great ideas and information. Here's the latest; Have the Sub-Frame connectors in, torque boxes capped, 'K' member gone (going to a Magnum Force - remember it is NOT a trailer queen but will be driven on the street also), still working on a few 'rust' areas in the pan, mini-tub, 8-point, etc. Engine; Going to go with a 540CI , Indy Head - EZ-1's and have Jim LaRoy do the port work, 4,000 stall, 13:5 - 1 pistons (yes I LOVE compression!), and a few little magic tricks (NO POWER ADDERS/CHEATERS). Will keep everyone posted as I did the 'Sub-Frame' connectors different that I've ever seen. Have Pics and will load on a 'Poison Dart' Blog in the future.

[Cranky]

Sounds to me like you'll have a car that's in the 9's if you can get traction.....may need to do more than mini tub it just in case.

[77dragracer]

Gonna be LOTS of torque coming out of that build!

[SB Dakota]

Well just my two cent here... i myself love the SB's. if it is bulid the right way with the right parts in the right place that all works together. it will run so sweet. myself i have a 70 340 storked to a 416 . .this is my engine for my dart .

[dodgeboy8]

Looks good!

[hemisatellite]

I wish I knew how many times of the past decades I have said "there is NO SUBSTITUTE for cubic inches" and I still believe in that.

[Cranky]

Where's Papoo now!?

[Papoo]

Where's Papoo now!?

Hi Gang! Sorry for the delay. Been very busy with my 'DAY' job. Have made great progress with my "Toxic Dart." Went ahead and replaced the floor pans. Continued to find MORE pin holes/rust/thin metal etc. than I realized. Ordering complete Mono Leaf/Caltrac set up this week. Also by May 1st will order the front end assy. Removed the entire front 'K' and such. Have a 'stock' 440, 915 heads, .20 gasket, .494 cam, hyd, dual plane, 1 3/4 headers, TQflite... I'm going to put this in to set up the suspension and drive this Summer in primer. I promis... Pictures are coming. The way we connected the frame is BAD ASS!