Gen VI 489ci bored .020 & stroked to 502ci 10.2"

[HawkX66]

I just picked up a 502 for my 69 last week after being offered a deal that I felt was too good to pass up. $2,500 intake to pan. It's a full roller 2015 8.0L (489ci) 10.2" deck GM block with 502 heads on it. Bored .020 & stroked to 502". 540hp/520lbft. It was just recently built by an engine shop and my buddy offered it up. He knew it would be perfect for my 69 Camaro. Would I pick a tall deck normally? No, but I think it will work out perfectly.
Initially I was hesitant about putting a tall deck in, but it fits excellent. The only issues are: 1. The Doug's header collector is just touching my floor. A small dimple will take care of that. The rest of the header fits excellent. There's more room everywhere else like between the header and the PS pump. 2. The valve cover just touches the factory 11" booster I have and I don't want to change it out. Again, a small mod to the valve cover or a Vette notched style one and I'll be good to go. 3. The roller cam doesn't have provisions for a fuel pump rod. The block does though. So I have to hide an electric fuel pump and regulator. I'm trying to keep everything basically day 2 stock looking to the average guy.
4. This is the one I'm taking a little time on. The intake offerings for oval port heads on a tall deck block are few and far between. The intake that is on it is an Edelbrock performer using spacers. I don't like that. I included a pic I took from inside with a cheap snake camera I have. You have to use a special distributor if you use the spacers. Most a/m tall deck manifolds have a recessed dizzy hole so you can use a regular dizzy. The intake Dart offers requires you to mill .060" to mate it to Chevy heads. Other than maybe a marine application intake, most of the rest are for rectangular port only. I'm thinking about just going that route. My understanding is that a lot of guys run rectangular port intakes on oval port heads. I'm not competing, but I want all the power I can get within reason.
Any thoughts? Good deal? Would you run the rectangular port intake on an oval port head? If not, why? Any suggestions on a driver's side valve cover? I'd really love to run my Mickey Thompson covers, but I don't think they're going to work out.










Pics from when I was being built.

[WILMASBOYL78]

Back in the day a lot of folks ran the #163 on oval port motors...no issues, you just need to use the correct gaskets. Seems like it should work ok with your setup...give it a try and see how it runs.

That thing will need some good rubber and suspension to prevent sub-orbital flights [img]<<GRAEMLIN_URL>>/rolleyes.gif[/img]

[EZ Nova]

I agree with Wilma, the 198/163 intake WITH the spacer will be fine with that. You won't lose any power at all.

Also, I would get an old mech fuel pump and just run it straight through to give it the look of the stock pump. I would run a holley RED pump since it doesn't need the reg, and at 97 GPH, it should feed that 502 fine as well.

[HawkX66]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: WILMASBOYL78</div><div class="ubbcode-body">Back in the day a lot of folks ran the #163 on oval port motors...no issues, you just need to use the correct gaskets. Seems like it should work ok with your setup...give it a try and see how it runs.

That thing will need some good rubber and suspension to prevent sub-orbital flights [img]<<GRAEMLIN_URL>>/rolleyes.gif[/img] </div></div>
&quot;to prevent sub-orbital flights&quot; That made me crack up...


<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: EZ Nova</div><div class="ubbcode-body">I agree with Wilma, the 198/163 intake WITH the spacer will be fine with that. You won't lose any power at all.

Also, I would get an old mech fuel pump and just run it straight through to give it the look of the stock pump. I would run a holley RED pump since it doesn't need the reg, and at 97 GPH, it should feed that 502 fine as well. </div></div>
Of course you had to say the red pump. I got a blue one with the engine. I think I'll just throw a regulator and gauge on it instead of buying another pump. I'm planning on throwing a mech fuel pump for looks. We'll see how it looks with the air gap intake first. Might be a moot point...
I ordered an intake last night. After weighing out all the options, I settled on the Chevy Performance ZZ572 intake, but I'm still talking to Brodix to see if they might have a better option. Jegs was the only one that had the GM intake in stock that I could find. Everyone else had ship dates a month out. It's a rectangle port, single plane, air gap. So much for the day two look, but I think this will be the right intake for my combination. I ordered the gaskets they recommended for the intake.

http://www.jegs.com/i/Chevrolet-Perf...61161/10002/-1

[EZ Nova]

Not sure I would have bought that intake! I think with your combo only making 540Hp, that might be a bit of a lose with the intake, and if you're going to get the correct aftermarket intake, get the oval port as it WILL work better all things considered.

I probably would have went with the original intake you got, blasted it back to raw aluminum, and ground of the name. BUT we also didn't get cam specs either.

I made about more than 220+Hp more with my 198 OEM ported dual plane on my 475 then what your motor is making! So you know you can make lots of power with a dual plane.

[HawkX66]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: EZ Nova</div><div class="ubbcode-body">Not sure I would have bought that intake! I think with your combo only making 540Hp, that might be a bit of a lose with the intake, and if you're going to get the correct aftermarket intake, get the oval port as it WILL work better all things considered.

I probably would have went with the original intake you got, blasted it back to raw aluminum, and ground of the name. BUT we also didn't get cam specs either.

I made about more than 220+Hp more with my 198 OEM ported dual plane on my 475 then what your motor is making! So you know you can make lots of power with a dual plane. </div></div>
A ZZ572 is making 620hp out of the crate. Why would I lose with the same intake? Because I'm 80hp less? I'm not sure you understand what I'm really trying to accomplish. I currently have an Edelbrock Performer with spacers for an intake. Not ideal. I would need a slip collar dizzy to make it work also. Waste of money IMO. If you can find a single Oval Port intake for a tall deck block for less than a pound of flesh, I'm all ears. I can't find a single one. They are all rectangle ports and this is what appears to be my best option. Most of the others are purpose built for Dart &amp; Brodix heads etc.
In the end, I'm not really worried about gaining anymore HP/Tq right now. If I tried to use what this one will put out in it's current form, my stock 12 bolt will wheel hop itself to death.
Don't misunderstand me. I appreciate all the comments and opinions. I just want to make sure we're on the same sheet of music.

[EZ Nova]

Dave, I was worried that you don't HAVE 572 inch or 620 under that intake. It might just be to big and lazy down low. You could do nuch better if it was drag race only style car, but on something that runs under 3000RPM, I just don't think that is better for you combo.

You both so try them and see what you like. GOOD LUCK

[HawkX66]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: EZ Nova</div><div class="ubbcode-body">Dave, I was worried that you don't HAVE 572 inch or 620 under that intake. It might just be to big and lazy down low. You could do nuch better if it was drag race only style car, but on something that runs under 3000RPM, I just don't think that is better for you combo.

You both so try them and see what you like. GOOD LUCK </div></div>
Unfortunately I won't be trying the Performer intake. I would need to buy a slip collar distributor to make it work. That's one of the reasons I want a new intake. My guess is that lazy down low will be insignificant. This motor has so much torque that I think it will overcome any low RPM issues. I could be wrong though.

[scuncio]

That was a great deal.

[HawkX66]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: scuncio</div><div class="ubbcode-body">That was a great deal. </div></div>
Thanks. That's why I'm dealing with the few issues the tall deck creates. Once I get them ironed out, I think it will be a great power plant for my 69.