I just got a 400 SBC for $50.00 the number 6 bearing was spent and wore the crank. What I need help with is rebuilding. I will probably go with another Scant 9000 crank and 5.7 rods. Im not sure what type of pistons to use because this will be a street driven car, however not a daily driver. I want it to have a lopey idle (not too radical) My plan is to get a set of AFR 195 heads, no sure on the CC ratio would be good for street. Other items will come out of my sig: intake, Headers, Carb, tranny. gears.
RECOMMENDATION

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DTL504

84 Z28 Camaro, 2 Seater Convertible, w/283 bored 80 over,flat top pistons, 202/160 Camel Hump Heads 64cc (3782461), Blueracer Camshaft: Duration 230/230 @.050 Lift 480/480 109 degrees, Edelbrock RPM Maniford, Holley 670 Avenger Carb, Hooker Ceramic Coated 1 5/8 Headers, 700R4 Transmission w/Transgo Reprogrammed Kit, Transgo Shift Kit and .500 Vette Servo, 3:73 Limited Slip., Kyb Shock, Spon LCA and ADJ. Panhard Rod.

DTL...Seeing that you`re starting basically from scratch,go with 6.0 rods, K/B pistons are a good choice too.
With those heads you can go anywhere from 9.5- to as high as 11-1 with the right cam.

Cam wise: Ultradyne 284/284 .490/.490 232/232 @.050 110 sep.This single pattern Hyd F/T will work fine. Order it in a small base circle version for cam clearance. Is the factory crank beyound repair? It`s a good crank if you can use it.

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78 Camaro hyd cam 406
TH350-3.23 gear
11.86 ET
116.7 MPH

I agree with the cam duration of around 230-236 @.050. I chose a hydraulic roller with 236 @ .050 and am VERY pleased with it. I can idle down to 600 RPM if I feel like it and it pulls hard from off idle to 6000. The cam doesn't seem to LOPE real hard, but it is slightly noticable. Just for a reference point, the 425hp 409 used a solid cam with 237 @.050. Good luck.

DTL504,
being its going to be a street car ,I would stay at 9-10:1 compression depending on cam and heads. pump gas is a must I assume? I have a 280 CompCam and it sounds lopey (mild)although the bigger the motor the bigger the cam for the same lope...do a search on combos that work... good reading.

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My '68 Camaro (http://hometown.aol.com/Dougs68Camaro/index.html)
Doug G.
68 Camaro
406 ci.
13.5@102 W/ 2.73POSI.

[This message has been edited by DOUG G (edited 07-08-2002).]

The Scat cranks are good, and a new line is out that costs very little (like $175 or so for a crank). I know David Vizard has tested hundreds of them to 600 + HP and not a single failure to date. Also, get a good flexplate. Nothing worse that having that let go and making your car look like it drove over a landmine. I agree with the above compression recomendation, 9.5:1 - 10:1. Just some good hypereutectic flat top pistons will be fine, and stick to around 76 cc combustion chamber size and you should be set. If cash is not a concern, then the 6.0 inch rods are cool, but they cost considerably more that 5.7 inch rods and offer little if any performance gain. For the cam, go big lift (.48 - .50) and 230 - 250 duration; more duration will give you the lopey idle but may sacrifice some low end torque. While you are at it, you might as well get full roller rockers. They seem to do a better job at making full use of the cam's lift.

Can you grind the crank to 2.00"s and use small journal 5.7" rods to save some money? I really don't consider a 400 an rpm engine so they should be fine up to 6000 or so rpm. Imho. pdq676

If you use the cam in your sig the engine will likely make around 11-12 inHg of vacuum. Power accesories such as power brakes start to become very finiky at vacuum levels less than this. With a cam that large and that LCA 10.5:1 CR should be no problem.

An 11:1 406 with AFR 210's, big dual-plane intake, and Comp 12-433-8 HR cam will make at best, on a good day and the planets aligned, 10 inHg vacuum at idle. This is the same combo used on the AFR website. Go one size smaller on the cam and you're at 12 inHg. It will still have a very noticable idle.

Scat can supply whole rotating assembly which includes I-beam rods, C&A rings, and SRP pistons. Unless you are planning on using nitrous or spinning it up to 7000 RPM the 9000 series crank should work fine. Your combo, with your cam, will max out at 5500-5700 RPM. Perform a site search in this section and look for Joseph's chassis dyno numbers. His engine combo is similar, but uses one step bigger heads and cam.

You may find that fitting 1 5/8" headers to the AFR port will require some work. AFR exhaust ports fit 1 3/4" tubes better than 1 5/8". There may be enough excess weld in the flange to make them work.

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The Red Beast http://www.geocities.com/casanoc

[This message has been edited by CarlC (edited 07-08-2002).]

what carl said.

You can get rods that are "stroker clearanced" and it will put an end to your reduced basecircle issues. You also won't need custom pushrods. But you should check pw length befor buying anyway.

If you really want to wake the thing up find a cam that will give you .55 lift or more (especially on the AFR heads).

You want lope? idle.MPG (http://cis.tamu.edu/~jcb9392/idle.MPG)

109lsa with 239intake and 245ext.


[This message has been edited by 89rs400 (edited 07-08-2002).]

89rs400..As they say... "short but sweet" sounded good though!
Have you been to the track with it? and if so whats it run? (if you don`t mind) I love them 400`s http://www.camaros.net/forum/smile.gif


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78 Camaro hyd cam 406
TH350-3.23 gear
11.86 ET
116.7 MPH

no, http://www.camaros.net/forum/frown.gif it has not been to the track yet.. (too many irons in the fire soo far.. but its time to get this thing fixed).

I dont think it runs quite like it should. It just does not pin you back in the seat. I have a couple of different intakes now and will be puttin it on a dyno (dynojet first then engine dyno maybe) in the next few weeks.

Here is a little rev rev.mpg (http://cis.tamu.edu/~jcb9392/rev.mpg)



[This message has been edited by 89rs400 (edited 07-08-2002).]

I was wondering what everyone think about this KB Piston Set for a 400 sbc (SIL KB-127). Scat 9000 Crank 3.75 stroke.
What type of compression will I get with the AFR heads with 74CC. The site recommend 76CC. I dont think that i will have a clearance problem so for and this is a pretty good kit for the price. Open for Opinion and recommendation. Will I still be able to use my A.C.T. 3000 Stall and Pro-Built 700R4 Street/Srip.
CAM:Specifications:
* Advertised duration: 282 intake/288 exhaust
* Duration at .050 in. cam lift: 230 intake/236 exhaust
* Gross valve lift: .510 in. intake/.520 in. exhaust
* Lobe separation: 110 degrees
* RPM range: 2,200 to 5,800
Someone please Dyno this for me: http://www.racepartsstore.com/keith.html

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DTL504

84 Z28 Camaro, 2 Seater Convertible, w/283 bored 80 over,flat top pistons, 202/160 Camel Hump Heads 64cc (3782461), Blueracer Camshaft: Duration 230/230 @.050 Lift 480/480 109 degrees, Edelbrock RPM Maniford, Holley 670 Avenger Carb, Hooker Ceramic Coated 1 5/8 Headers, 700R4 Transmission w/Transgo Reprogrammed Kit, Transgo Shift Kit and .500 Vette Servo, 3:73 Limited Slip., Kyb Shock, Spon LCA and ADJ. Panhard Rod.

DTL...IMO you`ll be better off using the 68cc chamber heads if you have yet to order.
Then use the 6.0 rods with KB 130`s. As is, that would put you at 9.8-1 comp.
I would go a step further though....have them milled to 64cc then your compression would be 10.2-1 just about perfect.
Those heads have thick decks.
Those pistons are very light too,. and the 6.0 rod is where it`s at.
As far as the site recomending the 78cc heads thats really not the thinking as of late...go smaller chamber and a dish piston to get the compression.

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78 Camaro hyd cam 406
TH350-3.23 gear
11.86 ET
116.7 MPH

Although these are just figures likely based on stockers, here are some compression ratio examples for the 400 with typical 24cc piston dish volume:

57cc head = 9.7:1
64cc head = 9.1:1
69cc head = 8.7:1
76cc head = 8.2:1

That is why I figured lose the dish and go for flat tops and a larger chamber, but it all boils down to the same result in the end really.

*figures obtained from a rebuild book by David Vizard if anyone is curious.

How about a 377, 350 crank and rods in your 400 block if your on a budget? Fun engine and they rev to the moon.

Here's some DD numbers from my motor which is pretty similar to your combo:

400 w/.040 overbore
KB Claimer hypereutectic pistons
10.3 to 1 CR
AFR 195 heads w/74cc chambers
CC hydraulic roller 230/236, .510/.520 lift, 110 lsa
Stock crank and 5.7" rods
1-3/4" headers
RPM or Victor Jr. intake
750 carb

Single Plane Dual Plane
RPM HP TQ HP TQ
2000 155 406 168 440
2500 204 429 218 457
3000 258 452 267 467
3500 322 483 325 487
4000 385 505 380 499
4500 441 515 429 500
5000 483 507 463 487
5500 510 487 483 461
6000 512 448 479 419
6500 497 401 461 372


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Scott
'69 400SB, Richmond 5-speed
www.geocities.com/sdenning1 (http://www.geocities.com/sdenning1)

What do you think about the rotating assembly from Ebay "Gofaststuff" http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=1842832696

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DTL504

84 Z28 Camaro, 2 Seater Convertible, w/283 bored 80 over,flat top pistons, 202/160 Camel Hump Heads 64cc (3782461), Blueracer Camshaft: Duration 230/230 @.050 Lift 480/480 109 degrees, Edelbrock RPM Maniford, Holley 670 Avenger Carb, Hooker Ceramic Coated 1 5/8 Headers, 700R4 Transmission w/Transgo Reprogrammed Kit, Transgo Shift Kit and .500 Vette Servo, 3:73 Limited Slip., Kyb Shock, Spon LCA and ADJ. Panhard Rod.

might want to check with this guy also. http://cgi6.ebay.com/ebaymotors/aw-cgi/eBayISAPI.dll?ViewSellersOtherItems&userid=dynoflo1

Did not see the rotating assembly for my engine. Did I miss something. Also his prices is a few bucks higher...

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DTL504

84 Z28 Camaro, 2 Seater Convertible, w/283 bored 80 over,flat top pistons, 202/160 Camel Hump Heads 64cc (3782461), Blueracer Camshaft: Duration 230/230 @.050 Lift 480/480 109 degrees, Edelbrock RPM Maniford, Holley 670 Avenger Carb, Hooker Ceramic Coated 1 5/8 Headers, 700R4 Transmission w/Transgo Reprogrammed Kit, Transgo Shift Kit and .500 Vette Servo, 3:73 Limited Slip., Kyb Shock, Spon LCA and ADJ. Panhard Rod.

send him e-mail (u might have to go to his website). I got a 400 rotating assembly for 1200 and he payed shipping.

I've ordered things from GoFastStuff. Great guy and great service.

Eagle stuff is good too. They have cast crank kits with SIR I-Beam rods and KB pistons. That balanced setup should be around $1200.

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Joseph

1969 Camaro
Engine and Exhaust:
404 SB w/ 10.3:1 Eagle 4140 assembly in Dart Little-M block, AFR 210's, Crower #00350 short track solid cam 238/244 @ .050" on a 107 lobe center and .530" lift w/ 1.6 rockers, Holley 750 vac sec, Victor Jr., custom 1.75" headers, Spintech 2.5" exhaust with x-pipe and Sportsman XL mufflers.
Transmission:
1996 T-56, CenterForce Dual Friction clutch and billet flywheel
Suspension:
Guldstrand Mod. Landrum 600# front springs and adjustable spacers, Hotchkis 1.125" front bar, Detroit Eaton 175# rear springs, Bilstien shocks.
1971 Ford Bronco
Stock 302, 4" rock crawler suspension lift, 1.5" body lift, NP435 tranny, 4.11 gears, Detroit Locker rear diff., Power-Lock limited slip front diff., 33" BFG MudTerrain tires.