I am selecting a blower for my blown 502 project. Here are the parameters:

- 502cid
- AFR 357 heads
- 8.6:1 compression
- Potentially intercooled, but fitment possibilities will determine that ('69 Camaro)
- Mild cam (212/218, or something in that range)
- Around 14psi of boost (or more if I can intercool it)
- Port fuel injection (Holley rails & intake, FAST ecu)
- Aeromotive 1000 pump
- 12-rib drive

Other than the "max horsepower" figures, ATI doesn't give you much data to help with the decision.

Is there a downside, other than larger parasitic loss, to starting with F2?

- Dave

 

What is your goal Dave? What kind of power are you expecting?

 

Well, I know its not conventional, but I think starting with the power is backwards. I think you should start with the CFM and boost, and see what blower flows efficiently at that flow rate.

If forced to pick a horsepower range, I'd think a 502 with good heads at 14psi would make around 850-950.

If you can recommend a head unit, what would be really helpful is if you could say -why- it would be better for this application than the other choices (not from other manufacturers, just amongst the ATI product line).

Thanks,
Dave

 

Well, I think its important to start a project with a goal, which I why I asked. I'll be happy to help if you're willing to nail that down.

 

Well, let's use that 850-900 mark as a starting point, and if you can, help me understand why one choice would be better than the others.

Thanks for help!

 

Our centrifugal superchargers are happiest running near the top of their max rated rpm. (read most efficient) For this reason I try to spec a customer's supercharger with this in mind, with room to grow if we agree that you might ugrade your project in the forseeable future. Keeping the rpm up in the upper range will provide the best response from the system. For your application an F1 would get the immediate job done, but would be near maxed out. The F1R would be a better choice as it still has room to grow and will still be operating in a good zone with your current setup.

The F2 is our workhorse competition blower, but wouldn't really be utilized by your project right now and will pose more of an installation hassle in your Camaro assuming you have inner fenders. Many people notch the valvecover to fit the larger housing in closer for packaging. We have an optional bracket that allows for more adjustment of the head unit position (where it bolts to the cylinder head).

By the way a single A1000 won't be enough fuel. You will want to either get an Eliminator or have the FAST system stage in another A1000 when under boost plumbed in parallel with a checkvalve to your existing pump. This will double your volume.

 

Good info! So would an F1R clear both the inner fenders as well as the valvecover with the standard bracket?

Thanks,
Dave

 

umm..I think so. : )

 

Well, I think my check to ATI will clear :-) Is there any way to find out authoritatively? I could rely on the measurements in the sales literature, but if there's already an example of someone installing the F1R in a 69 Camaro, all the bettter!

 

Check the net. Google is your friend. I'm a mouse motor guy. At some point in time I'll mock one up at work and get measurements, but no timeframe.

 

I did Google, but couldn't find any examples. You mean ATI has never sold an F2 for a big block Camaro?

 

I think they mainly make most of their kits for an exact application such as '88 and up F-Bodys, '86 and up Mustangs, so on and so forth. When it comes to older applications, the sky is the limit. I've heard of and seen lots of 1st gen F-bodys with ProChargers. I've just never paid close enough attention to them to notice if they had to make any modifications to make them fit. I know I've never heard anybody complain that they had to make any major modifications to a 1st gen F-body to make a ProCharger fit. Hell, I have a friend that has a 70 1/2 Camaro with a BBC and an F2 that didn't require any major modifications, and I would think his engine bay would be smaller than a 1st Gen.

When it comes tothe valve cover, it's going to depend on the style and height of the valve cover itself. I've seen an F1R clear a stamped steel valve cover on a BBC, but just barely run into a tall cast aluminum valve cover.

I hope my ramblings help a little. Have a Merry Christmas!

 

I would imagine it would clear the valve cover. Its the non-cowl hood and the inner fender I'm most worried about.

I did find a random post on another board of someone saying they had ordered an F2 for a '69 bigblock, so waiting to hear back if he ever installed it.

 

I don't think you're going to have to worry about the hood at all. If anything, you might have to make a small indentation in the inner fender. (Worst case scenario.)

 

I was part of the Super Chevy Danger mouse article in the December issue and during dyno testing we used an A1000 for both natural and boosted setups. On the natural setup the motor needed around 40psi from the pump and it ended up makeing 480hp. But when we slapped the procharger on, the A1000 couldn't hang. the Fuel requirment's were around 62 to 65 psi from the pump. We used a weldon 2025,not one hiccup. the motor made 780hp and there was plenty more fuel to be used.