Hey guys,

I've responded to a few posts where I made mention of getting an ATI Procharger for my 68 Chevelle convertible. I spelled out some of the benefits over a "roots type" (6-71 type) blower and mentioned that I had a procharger on order. I ordered the D2R which is the second to the largest ATI unit. Well I finally got it!

And, it doesn't fit! http://www.chevelles.com/forum/mad.gif http://www.chevelles.com/forum/mad.gif http://www.chevelles.com/forum/mad.gif !

Anyway, I am still looking into ways to fit this thing in there, but it will require removal or serious beating or cutting of the fenderwell. I'm certainly not going to beat or cut the fenderwell, but I am going to remove it for now to see if I have the necessary clearance to the tire and that's what I'll be doing tonight.

But right now with the fenderwell in place I am 2" away from being able to shut the hood, and that's without any additional clearance this unit should have. My buddy had originally informed me that ATI said this unit would fit into 68-72 Chevelles. I found out later that ATI based this off it being installed in 67-69 Camaros (and apparently the largest unit, the D3 has also been installed in Camaros). And in looking at my buddies 67 Camaro it does appear that he has more room from the engine to the fenderwell than I do. It does not seem to make sense, but it is there. The Camaro fenderwell slopes down much more quickly than the one on my Chevelle.

Anyhow, I wanted to keep you guys informed in case your also considering the D2R unit and especially if your considering it based on my suggestion. I will keep you guys posted on what I find out. And if I knew how to post pictures, I could show you, since I've taken a bunch of digital photos.

bigdog454



[This message has been edited by bigdog454 (edited 02-23-2001).]

Sorry to hear about the fit. I'd really like to see the pictures as I'm sure others would as well. Maybe with all of the genious gearheads on this site, somebody could have a helpful idea. To post your pictures, go to this site. http://www.photopoint.com/
It's free. You start an 'account'. Upload your pictures into your page. When you can pull up the pictures, use your Edit key to copy the web address by clicking on the address bar and highlighting it. When it is highlighted, click the Edit, then Copy.
When you get back to this post, start a reply. When the reply comes up, point your cursor to the reply box. Then, go to Edit again, then click 'Paste'. The URL should be transfered to the reply box. You may know how to do this already, I just thought I'd explain it like I needed it to be explained to me and not in total web talk. Hope you get them here.


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Triple Black 69 SS 396

Did you consider using their D1SC blower? The self-contained units have the same airflow and set-up gearing as the non-self contained ones but according to ATI they're the same overall size as the smaller P600B/P1SC blowers. They also have the MAJOR benefit of no engine oil to the blower which simplifies the installation and lowers the intake air temp 180 degrees or so.

That's the unit they talked me into for a 69 Camaro project. I was going to go with the P1SC due to size problems but he informed the D1SC is the same size (only the SC models, the others are bigger). You're right about the fenderwells too. On a 72 Camaro with a small block and a P600B I STILL had to trim the inner fenderwell slightly. The 67-69's have much shorter fenderwells.

Jody

[This message has been edited by camcojb (edited 02-24-2001).]

Hey Jimmy P, I just got onto photopoint and signed up for an account. As soon as they get me a password, I'll try to get some of these photos posted.

Hey Camcojb; In talking to my buddy we discussed possibly having to go to the D1, so I'm glad you clued me into the D1SC being a smaller OD than the regular D1 (he hadn't mentioned that). That may be what I have to do, I should know for sure tonight.

How much power do you plan on making?Thier are D1 models that move enough air to easily put a 3800lb. car in the 9's.Depending on your goals a D2r might be overkill.

bigdog,

here's an idea: pull your fenderwell, set it aside. find another fenderwell, matbe one of the plastic ones, cut it up however you need it cut. If you ever want to go back to stock, put your original fenderwell back in.

Tom

Yes, the D2R is overkill, but I decided to get this because there's a whole lot of room to grow. If I want to go faster, a smaller pulley and race gas. And the D2R was supposed to fit, according to ATI.

I did not get to work on it last night, but I will be working on it tonight.

Hey Tom, regarding the fenderwell, I was thinking the same thing, I just have to find another. I do have a 70 Cutlass I'm thinking of parting out, I wonder if that one might fit?

[This message has been edited by bigdog454 (edited 02-26-2001).]

OK, I got setup with that photopoint account. Hopefully 3 pictures will be here, one of the D2R on the engine, it is about 1/16" above the fenderwell, so that's as low as I can go without modifying the fenderwell. There is also a side shot showing how far up the D2R sits, and one with my hood resting ontop of the D2R.
http://albums.photopoint.com/j/ViewPhoto?u=1548885&a=11745755&p=41888399 http://albums.photopoint.com/j/ViewPhoto?u=1548885&a=11745755&p=41888401 http://albums.photopoint.com/j/ViewPhoto?u=1548885&a=11745755&p=41888402

[This message has been edited by bigdog454 (edited 02-24-2001).]

Kripes Bigdog, that thing is HUGE.

Well I finally got around to pulling the fenderwell out of the Chevelle and putting the Procharger on the lowest bracket setting and the unit still does not fit under the hood!

It appears that ATI does not do their homework. I am going to try to get them to make me a bracket that will allow it to fit, especially since they sold it to me stating that it would fit my car. I'm not holding my breath, but we'll see what happens.

Anyway the photo is of my hood resting on the Procharger with the bracket in the lowest position.
http://albums.photopoint.com/j/ViewPhoto?u=1548885&a=11745755&p=44191316&f=0

Hey Bigdog (if that is your real name),

What kind of intercooler do you plan on running? I've started test fitting my intercooler (a 26 by 18.5 by 3 inch core without end tanks) on my '68 chevelle, and there is more than enough room if you remove the hood latch and its lower supporting bracket.

Dave

I'm not planning on running an intercooler at this time. What unit are you running and how did you get it to fit?

Bigdog,

I will be installing a turbocharged, fuel-injected 383 LT-1. I'm still gathering up money to buy a new forged rotating assembly for the LT-1, but the turbo is ready. I haven't test fit the turbo yet, and the engine is still out of the car, so I can't tell you how it's going to package yet. My goals are 650 Hp on pump gas and 750 Hp on race fuel. I designed and built the turbo myself - I'm a turbocharger engineer for Garrett. I chose to use a large single turbo instead of twins: different method of packaging, and higher turbine efficiency.
I'd sure like to talk you into using an intercooler on your car. I don't know what you have planned for it (drag use, street, road race, etc), but you will only benefit from it. The ATI units use a moderately efficient compressor wheel that I beleive is a Garrett/AiResearch design. Depending on what kind of boost you run, the intercooler can buy you A LOT of extra power because it increases the density of the intake manifold air. In other words, it lowers the intake air temperature. Here's an example for a supercharged 400 cubic inch V8 running at 6200 rpm with and without an intercooler:

12 psi, 74% comp eff, 95% vol eff, 12.5:1 A/F, NO INTERCOOLER
>>> 600 Hp with 220 deg F intake manifold air temp

9 psi, all else the same, INTERCOOLED (70% effectiveness), 1 psi pressure drop in intercooler,
>>> 623 Hp with 120 deg F intake manifold air temp

I ran these figures with the same software I use at work every day. The intercooler gives you a denser charge at lower temp and pressure. Keeping that intake air temp low is very important to avoid detonation and keep your timing advanced. It really is free, safer power - it more than offsets the increased intake volume.
Intercooleras are normally very expensive, but there are a few cheap alternatives to buying one new. Try to find a good intercooler from a modern Ford PowerStroke 7.3L V8 F250 or F350. You'll probably need to cut the end tanks off and design new ones up, but it's not that hard.

Dave