alnukem

I was going to build a 383 & I ordered a set of the new AFR 195 Eliminator Competition Ported heads. Now I am thinking maybe I should just buy a new Aftermarket block & go for a 415.............what do you guys think & will these heads support this many cubes???? I think my problem is I think waaaay too much! Here's the flow numbers!

195 SBC ELIMINATOR COMPETITION FLOW NUMBERS


INTAKE EXHAUST
.200 140 CFM 115 CFM
.300 202 CFM 165 CFM
.400 248 CFM 200 CFM
.500 280 CFM 217 CFM
.550 292 CFM 220 CFM
.600 300 CFM 225 CFM

MotorHead

Those sre some big flow numbers that should get you in the 600HP range with the right components on a big small block if that is what they actually flow.

Are those the $2000 heads ? I hope you get some help selecting the proper parts to go along with those heads, you have a makings of a killer small block

I am currently collecting parts for a 427/434ci and am going to port my Vic Jr.s I will be looking for intake flow in the 320-330cfm range and am shooting for 600+HP and 600TQ on pump gas and have very good street manners.

comp

alnukem

Yes, they are the big ticket heads. Are you going with the 400 mains or the 350 mains? I was thinking about a World Products Block.

Gordonm

Nah. Those are way to small for a big cube motor. You need to sell them to me and get bigger ones.

Seriously they should support the big cube motor for all but an extrmely high HP high rpm motor. If you are going for max power with a big roller cam step up to the bigger heads. For a milder motor they should work OK.

BB72

Those heads are going to be great for a 415. I had a mild mannered 406 with ported dart torquers and a 292 magnum cam, it was pushing 450hp. I did have a 4sp though. The intake runners were about 190 after porting. If you want 600hp I'm thinking you'll be pushing it hoping for mild manners but I'm no expert. Maybe the rollers they have today are just that, more mild mannered.

flynbyu82

You have the '81 right? How's your current setup working (refresh my mind on horsepower)? Anything break so far?

MotorHead

Right now I am pretty close to 600HP ( motor dynoed 547HP but was extremely lean, have since fixed that ) but torque is lower. I want to get the torque closer to the hp and will try that with a 427ci small block built in the basement this winter.

This is more of a hobby kind of thing rather than trying to most horsepower. I could build one 700-750HP but it wouldn't be alot of fun in rush hour traffic.

The real tricky part is matching up components to get the HP you want and still be fun to drive on the street and it is not as easy as it sounds.

I broke 2 Super T10's when I initially installed the 406ci and so far that is all I have broke. I put in a TKO 600 and that and the combination of spinning tires instead of hooking has saved the rest of the drivetrain so far. I am also fairly easy on the car, I could rip out the rear end if I wanted too.

flynbyu82

One more question for MotorHead then I'll leave this thread alone

I'm hoping for around 500hp out of my new engine combo, and I geuss I have to expect my tranny to blow, considering it's a stock 700R4, I don't even know if I should waste the money having it rebuilt . But, on the positive side, the fact that your driveline has survived makes me smile !! Anything done to beef that up? What kind of tires are you running?

gkull

Wellbuilt 700R4's would last for years in front of 500 hp.

I actually ran my 427 SBC with a only a set of AFR 210 ready heads for a short period of time to see how it would do. AFR told me that they would support up to 600 hp.

I think that they ran pretty good when combined with a single plane and free flowing exhaust. The new 195's that your looking at have simular flow. I was also using .629/,620 lift to make my heads works. I also had mid 10 compression. Like 10.7 that is one area that you have to keep up when you install longer duration cams. I had the 210's flat milled to 64 cc and should have even made them smaller.

63mako

Why get rid of that Bad 406??

MotorHead

Like I said, it's a hobby, something to do, I like building motors, the 406ci shortblock will sit on a stand as a backup, I can't use anything on it anyway, it is externally balanced . The Vic Jr. heads are going to the best head porter in this area $$$$$

I have the DragVette safetly loops and 295/50/15 BFG's on the back, good relief valve as they don't hook worth a crap

MotorHead

Oh....and I may go with a hydraulic roller

63mako

big_G

What's next...the sky falling or hell freezing over?

63mako

BOTH! The guy has to be yanking our chain!

MotorHead

No I am serious look at the specs on this Magnum hydraulic roller it has almost the same lift as my solid roller .560" compared to 570" and the duration is 230degs compared to my 242/248degs and the spring pressure is over 100lbs less.

For the number of times I rev to 7000RPM I am starting to look at hydraulic rollers for the new motor

Don't get me wrong, solid roller is a killer cam, and I love mine just looking at al the alternatives at moment, early in the planning stage

Extreme Energy XR280 R solid roller

Part Number 12-771-8
Engine 1955-1998 Chevrolet
262ci-400ci
8cyl.
Grind Number CS XR280 R-10
Description
Intake Exhaust
Valve Adjustment 0.016 0.018
Gross Valve Lift 0.57 0.576
Duration At 0.015 Tappet Lift 280 286
Valve Timing At 0.015
Open Close
Intake 34 66
Exhaust 77 29
These Specs Are For The Cam Installed At 106 Intake CL
Intake Exhaust
Duration At 0.05 242 248
Lobe Lift 0.38 0.384
Lobe Separation 110
Recommended Valve Springs 977-16

Magnum 286HR Hydraulic Roller

Part Number 12-450-8
Engine 1955-1998 Chevrolet
262ci-400ci
8cyl.
Grind Number CS 286H-R10
Description
Intake Exhaust
Valve Adjustment 0 0
Gross Valve Lift 0.56 0.56
Duration At 0.006 Tappet Lift 286 286
Valve Timing At 0.006
Open Close
Intake 37 69
Exhaust 77 29
These Specs Are For The Cam Installed At 106 Intake CL
Intake Exhaust
Duration At 0.05 230 230
Lobe Lift 0.3735 0.3735
Lobe Separation 110
Recommended Valve Springs 987-16

63mako

You think you had low end torque before, With 21 more cubes, the better flow on the ported heads and the lower duration this thing should not ever need to pull 7000 RPM. Your torque and HP #'s should tighten up and come in earlier, less wear on the valvetrain and less maintainance. You know me, I like it! Now all we have to do is convince you to go with a forged crank! Sorry about the hijacked thread ALNUKEM.

Little Mouse

save the money on porting the victor jr heads sell the 406 and
build a torque/ hp 540 the hood will have to go.

alnukem

I have a couple of stock 400 blocks, but it seems to be a waste to mess with them, putting like $900 in them. I can spend $800 more & have a stronger, more adapted block that can be rebuilt several times. And, a 415 sounds like a humble enough, easy to build combo with some long life. The tech from AFR said it would support it too. I was going to use the super t-10 for a year, but that sounds like a mistake, more ramen noodles to save for a TKO!!!!!!!!!!! What would the reccomendation for main bearing size...........400????????????? I really appreciate your guys input, Thanks!