hello everyone, im new here and dont own a chevelle (love them though) but I own a 79 Z28. UDHarold has been a huge help to me lately, so I thought I would join up and start posting. I am building a new torque monster 406 for my O/D auto pro-tour, street pounder build up.
I just want to share my combo list. here it is...
• 406 inch, zero decked
• Edelbrock E-Tec 170, 64cc heads
• Lunati VooDoo 276 60104- 276/284, 233/241 at .050, .504"/.525" 110 LSA
• 1.6 Roller Rockers on the Intake, 1.5 Roller Rockers on the Exhaust
• 6” rods
• -18cc dished pistons
• .040 quench
• 10.1:1 Compression Ratio
• Edelbrock RPM Air-Gap
• Holley HP series 750cfm
• Hi Flow Mechanical Fuel Pump w/ ½ fuel lines
• New style A/C compressor for weight
• Quick ratio performance steering box
• Custom 1.625, 40” primary length, 2.5” collector headers
• Pypes 2.5” Cross Flow system
• Billet 2004R transmission
• Custom 3000+ SS converter
• Transmission cooler
• Power steering cooler
• Aluminum driveshaft
• Built 8.5” 10 bolt
• Posi Unit
• 3.73 gear

so, what do you all think?

Welcome aboard!! Looks like a pretty good combo to me, what are the ETEC heads? Edelbrocks version of the vortec?

thank you... and yes, they flow better after 2500rpm though... and are aluminum
what kinda power you think I can get from it?

400-450 maybe, its tough to guess that kind of stuff. Compression might be a tad low for aluminum heads, but I've never run alloy heads before, so I'm taking a shot in the dark.

No reason why that combo shouldn't make 410hp/470tq or so.

damn, i was kinda hoping for 500lbs tq at the motor....
what can I change to bring the CR to 10.5:1 ???

flattop pistons, might get closer to 12-1 though, a tad high for the street, would be fine for a weekend warrior.

it is going to be a street car... power tours, 1000+ mile road trips, etc

I personally wouldnt mess with it unless you havent got all the stuff yet. Although I cant guess an exact torque number.....you have definitely got a pretty torquey recipe. Another half point in compression would help....but not a whole lot really. In the grand scheme of things, it would only be worth a few points. Id spend the money on dyno time as opposed to different pistons. A tad smaller on the cam would give you some more low end grunt....like the voodoo 268 cam for example. However, I doubt it would make more torque(But maybe)....but most likely just better torque at lower engine speeds, rather than very similar numbers but at higher engine speeds. That 268 cam is a better match for the heads though and of course would be a little better yet for driving seeing that its smaller....but as is, if you got all the stuff Id probably build it cause it wont turn out to be too bad of an engine really.

I picked the 276 because I gave UDHarold the the combo idea... like the 170 heads, 1 5/8" headers, 2.5" exhaust... and he said that the 276 would be a better choice combined with a 3000 stall, and 3.73's. seeing that I will run a OD trans, rpm's on the street I dont have to worry about. I asked about the 268 too, but he said the power is the same, but the 276 will make it at 300 rpm higher. and a 406 brings the rpm down by 300 rpm compaired to a 355.
who and I to argue with a pro? LOL

infact, here is some of the conversation between UDHarold and I

Thanks,
the fuel system will be a HiPo unit, plenty of fuel.
the rest of the combo I guess I should have mentioned will be...
RPM Air-Gap, 750 Holley HP carb, 1 5/8 40" headers, 2.5" collectors, 2.5" exhaust X-Pipe crossover system.
Which setup do you think will give me the BADDEST street motor and ocasionally run 11's in a 3600lb car?
the 60103 w/ 3.42's and a 2800 stall?? or the 60104 w/ 3.73's with a 3000 rpm stall??

thanks much for your help Harold.

Jason,

The 60104 will, without a doubt.

UDHarold

also, I hear so many good things about your VooDoo 268 for a trq monster 400. is the 60104 going to make the same trq as the 60103 on my 170cc E-Tec 406 w / 1 5/8" headers. ?? Sorry for all the questions, just trying to get the best for my needs for my tire shreading 406...
P.S. you can answer both of my messages on this one... and im sorry for bothering you

Jason,

The 60103 and the 60104 are very similar, with the 60104 moving the power band about 300-400 RPM higher. They have identical ramps, noses, etc. Only the durations and lifts are different.
The 60103 will make more torque at a lower RPM, the 60104 will make more torque at a higher RPM. I have never had any problem running a 355 with this cam, when we use a 3000 SS converter and a 3.73 rear. Once you have the fuel system right, and the cam in right, your biggest problem will be hooking your tires up.
I drove the 60103 in a 355 Camaro, unknown SS, and it had plenty of snap. The 60104 almost always runs high 11s in a street/strip car.
A 406 always moves the power band down about 300 RPMs.

Dont they make a 200cc E-tec head? I think that might be better suited to a 406.

Dont they make a 200cc E-tec head? I think that might be better suited to a 406.
That was my thought too...
You guys with the all the recent 406 buildups are killing me.
I've got a fresh, all forged/balanced rotating assembly, 6" rod, SRP flat top, 406 short block just sitting in the shop with nothing to put it all into. :(

wouldnt I loose all my sought after torque with the 200cc head?

wouldnt I loose all my sought after torque with the 200cc head?

Yep. A 283 will pull harder.....

lol, thought so !

wouldnt I loose all my sought after torque with the 200cc head?

Sorry.. I thought you were puting this in a Chevelle...not a tow truck ;) :D

As far as the camshaft, Harold is right on that for sure. I wasnt even considering your drivetrain....just looking at motor specs alone and figuring the 268 is a nice match with the 170 heads and 10:1 comp. the 276 will work just fine though as well.....Harold already told you that. It wont be too much cam for a 170cc head, and definitely will like your drivetrain. As far as your heads, I also agree that a 200cc head would be better suited for this motor...especially with the 276 cam in mind. However, if you already got heads....I wasnt about to tell you to buy another set of expensive heads considering it will still do rather well.

And as far as the torque issue, you dont necessarily lose torque with bigger heads either. Just like with the cam, it will move the power curve, so you will most likely lose power/response at low engine speeds....but you can still make as much torque/power or more at a higher rpm with bigger heads and/or a bigger cam. It all depends on what you want and how you are looking at the torque deal. You lookin for 500lbs right off idle, or 500lbs, but not necesarily at real low rpms? 500lbs at a higher rpm is faster than 500lbs right off idle(tow truck motor) cause you can utilize gearing and such moreso....and that helps a good deal.

I have a hard time understanding how 200cc heads on a 406 could be a potential slug in some opinions here when 396/402 came with "monsterous" 250-270cc oval ports. :confused:
Please, enlighten me...

The intake ports on the BBC's are longer, so the volume would be higher for a given cross-sectional area.

I third (as opposed to second) the bigger intake runner heads. With the stall, you are going to blow right passed that really critical range where small runner heads are most beneficial into an rpm range where the larger runner heads start to stetch their legs. Also, with a 3.73 rear gear and the DEEP first gear in a 200R4, it'll instantly rev right into the meat of your torque band. If you were sticking with a 3.08 or alike, you might need all that down low, but I think it's moot 3.73 and the R4's first gear. Plus, with a 406 you've already got a free 15ft-lbs over a 383 and 40ft-lbs or more over a 355!!!

BUT, it'll run great with what you've got put together. I'll fall in line with these guys at 425ish HP and 460ish ft-lbs. Should easily tip toe around that 12.0 mark with good traction.

I noticed you've been on nastyz28.com, you have nearly identical parts to the combo that Marv D posted over there on the 170 E-tech/406 combo in 'competion camaro', why not copy everything and use the lunati pn 00012 cam with 1.6 rockers?
http://www.nastyz28.com/forum/showthread.php?t=33836
That car is running 11.5's and he figures 460hp.

Oh, the 'street' exhaust somewhat on the border,, 1-5/8" uncoated supercomps into 3" pipe to the series 40 flows, and 3" to turndowns just before the rear end housing. Dana says he's damn near deaf after a 100 mile drive at 4000rpm on the freeway. Ear friendly it's not, but without a split pattern cam we wanted to have as little restriction as possible. Apparently it works..

If it was me I would like a car that wouldn't deafen you in 100 miles and runs a little less than 4000 rpm on the freeway. If he could tow a car the 100 miles and run 11's with the tow car, I'd go for that...

install full exhaust with cutouts? lol. I thought Doo had an auto with overdrive for the highway for some reason.
I remember seeing your build but what was it again? I have an interest following this thread as I have a 400 going in a camaro also, 6 spd though so I'll get the rpms down.

thanks all for the help....
my combo stays... lol
as for loud, I like loud, but not when im driving long distances... which is a main purpose of the car (power tours, road trips, etc).... im going to be using the pypes crossflow system, with two cutouts after the X for shows, and such

wouldnt I loose all my sought after torque with the 200cc head?


Damn, is that why my car is such a pig???????