|09-19-2011 04:56 PM|
That's a Detroit 671. I wouldn't bother with trying to convert it for a blower on your street car. By the time you buy the bearing plates, front cover, rotor pinning kit, and conversion kit you are around 900 smackers. Then you add in the front drive and intake manifold and you start nearing 2K. Then you have to polish it. I converted the one in my project journal. I spent over a year sourcing parts and polishing. I WOULD NOT DO IT AGAIN. However, the most important reason is that a non teflon tipped 671 on a BBC is a waste of time. You would have to overdrive it to make boost and the benefits would be negated by the extra heat.
If you want a blower get an 871 complete and ready to go. Sell that huffer to guy wanting to build a rat rod.
|09-19-2011 10:51 AM|
can anyone identify this super charger? i got it last night and i cant find anything on it. the only numbers i have found on it are 5120726 and 5114442 would this be a decent one to use or is it out of date waste of time stuff?
|09-18-2011 05:28 AM|
|v8mazda||awesome, thanks junkie. asl always this forum has been a great help.|
|09-17-2011 07:23 PM|
Use this calculater to figure gear ratio and engine rpm's.
This is not an O/D engine. it's going to want revs and to gear it for proper driving with an O/D then 1st will be so low it will never see it. Best bet with this much build would be a th400.
I don't have links figued out but copy and paste to browser if it doesn't work.
|09-17-2011 03:03 PM|
|v8mazda||ford you make me excited about this build lolol i do have 3:42 gear on the shelf.... better?|
|09-17-2011 02:57 PM|
3.08 gear and an od trans will kill the driving of this car. Your talking on a 26" tire of turning 1800 rpm's at 65 mph, this engine would be lunging on the cam at this rpm under load. I am guessing this thing is going to want to cruise around 2500 to keep cylinders clean.
>>>>little better then stock suspension<<<< It better be a lot better than stock if you really want this kind of power. Your 550 hp small block won't even compare to this in a good dream.................
|09-17-2011 12:28 PM|
agreed sounds like a nice set up. can anyone elaborate on the 4l60e thing i mx commented on? and thanks mx for the tip. would i need a computer for that? etc. i should be getting my motor tomorrow (sunday)
|09-17-2011 10:43 AM|
If you look at the numbers TI posted you can see what I was talking about.
HP doesn't come in till late in the program but is irrelevant because of the 513 ft lbs. at 2000 rpm's, this thing is pulling the house off the foundation from 2000 rpm's up to 6000 rpm's!!!!!!!!!!!!! You can bet the farm you better have some bite on the ground when that 1-2 shift comes in or this things going for the sidelines.
Thanks for chiming in TI, your stuff always makes sense.
|09-17-2011 09:27 AM|
|09-16-2011 04:25 PM|
great advice guys, techinspector you always go that little extra in your post's thanks. i'm not planning on putting this in the car till spring so by then maybe i will have a little extra dough to buy some better heads.
as far as whats going to be supporting this car. this is what i'm planning on doing and by spring i should be able to pull it all together.
"monster" performance 700r4.. sorry i hate 3 speed transmission. i know the 350th and 400th would be stronger but i have to have overdrive.
3:08 mini spool rear.
little better then stock suspension
depending on what build i go with maybe a small nitrous kit....100 shot.
i just sold my other camaro that had 550hp out of an sbc... i want bigger and better lolol
|09-16-2011 03:13 PM|
HERE'S AN EASY 650 FT/LBS....
Bore block +0.100"
TRW H112CP-100 pistons
Stock 6.135" rods with ARP bolts, resized.
4.250" stroker crank of your choice. (Scat makes a nice piece)
Stack = 9.785". Nominal block deck height = 9.800". Use 0.040" head gasket for 0.055" squish.
119cc heads with H112CP-100 pistons will produce 10.2:1 static compression ratio with a 9.785" stack and 0.040" gasket. Align hone the main saddles and take a light cut on each deck to you know that each corner of the block is the same distance from the centerline of the main bearing bore. The combination I'm showing here assumes a 9.795" to 9.800" stock block deck height.
Edelbrock RPM or Weiand Stealth intake with 850 carb...
Long tube 2" headers of your choice.
CompCams 11-713-9 solid roller cam....
RPM HP TQ
2000 195 513
2500 250 525
3000 319 559
3500 404 607
4000 487 639
4500 560 654
5000 615 646
5500 643 614
6000 643 563
6500 593 479
Peak volumetric efficiency 96.9% @5000
Peak BMEP 195.1 @4500
Make 600 ft/lbs with a little less cam, a hydraulic roller....
I don't think you will be happy with warmed-over production heads. They're just junk compared to some of the aftermarket heads being currently produced. $779 per head (assembled) seems to me like a heck of a price for a BBC head that makes this much power. My very best advice would be to put the project on hold until you have the money to buy the good parts. Don't blow what budget you have presently and be unhappy with a turd motor.
|09-16-2011 02:35 PM|
|6426yy||What transmission and rearend are you running gear ratio also. Everything has to work together. A small dome piston and a set of 049 or 781 large oval ports with some mild port work and a cam is all your gonna need to make it a strong driver. Your cam selection will depend on the rest of the car, auto trans stall speed, gear ratio ect, ect. Need more info!|
|09-16-2011 02:21 PM|
I haven't actually worked on a 454 but who ever told you they were a waste of time, doesn't know what they are talking about.
If you are looking for a great Street and Strip Motor or a Drag Motor they are great engines.
For this article not sure how accurate it is but it says you can get 700HP out of a 454 for around $3000
Car Craft is always good
|09-16-2011 01:58 PM|
|v8mazda||ohhhh lol ok gotcha. so it will be a fast get up and go car. sorry guys i got into wrenching a little late in life and no dad around so i'v definitly been going through a learning curve. but for 34 i feel like a kid again building these motors lol this will be my 3rd one, 2nd solo build|
|09-16-2011 01:44 PM|
Meaning you get it making maximum torque and let the HP #'s fall where ever you'll be smoking tires or breaking parts. Hard to beat a solid built BB for raw seat of the pants power.
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