Looking to install a D1X in place of my F1A on my fbody. My F1A was crammed in there and I hear the D1X is a little longer on the inlet side. I really want the D1x over the D1sc but don't want a bunch of fitment issues. Anyone do this? Looking to keep the stock radiator in the stock location. If I can't, what do I have to do to make it fit?

 

D1X bolts right in ZERO issues. I am running stock radiator (stock location/placement) with mightymouse shroud and spal fans along with truck hat for inlet.

 

Thanks! Have any pictures? Maybe it's my inlet that made everything so tight. Not sure if it's the truck hat or not. Did you retain your A/C? How close is your inlet to the radiator?

 

These are the only ones i have saved currently as the car is pulled apart for ls3 swap. The truck inlet is VERY tight to the lower radiator support i thin its called. I may notch it some to give a smidge more room however currently it is very helpful for assisting in holding it tight in place as i do not have a brace on my to help hold.

 

Thanks a lot for the pictures! Do you by any chance have one if the clearance between the inlet and the radiator?

 

I do not have any sorry. I went thru all the ones I have.

The inlet and radiator on mine it is touching the shroud and the lower rad support. I may notch it a hair this spring when I put back together because of movement of motor it would "loosen" the intake hat (i run the truck inlet on mine)

 

You might give ATI call and ask about their newly released J bracket with tensionser for the Fbody. Perhaps it has more clearance for the hat.

It will accommodate a 10 rib belt and pulleys so perhaps they have moved the J bracket a bit in order to get more clearance for the 10 rib pulley on the SC. IMO this would mean the SC placement location or standoffs would be different for a 10 rib setup vs an 8 rib moving the SC one direction or the other for clearance.

If I didn't already have an Aster Bracket I would get one. I like the belt routing better and looks like the tensioner won't flex either because of the way it is mounted on the J bracket. Doesn't say, but looks like no need to upgrade the water pump like is required with the Aster Bracket.

https://shop.brutespeed.com/ATI-3GJB...-3GJBB-003.htm

 

Man I just noticed this the other day when perusing on Brute Speed's website, I was actually thinking of purchasing an Aster bracket, but then this caught my eye. Can't find anymore information about it on the forums nor have I seen anything about it by Bob, but it does seem to offer a few advantages over the Aster. I'm strongly considering purchasing it, I may have to give Procharger and Bob a call, though I don't think Procharger will be apt to give it a comparison to the Aster bracket. Have you seen anyone on the forum running one of these? I may become a guinea pig lol.

 

Some things I would verify before buying the ATI bracket:

Water pump - Do you have to replace the water pump? You do with the Aster Bracket.
Air inlet hat - How much clearance between air inlet hat and the radiator with the 8 rib pulley setup compared to the 10 rib pulley setup?
Pulleys (crank) - what size for both the 8 rib and the 10 rib? Do they offer an 8.65 pulley both in 8 rib and 10 rib or just the 7.65 pulley?
Pulleys (sc head unit) - do they offer same number of sizes with the 10 rib pulley as they currently do for 8 rib pulleys?
Pulleys (idler and tensioner) - It appears from the belt schematic that the tensioner pulley size is the same as the idler pulley. IMO that is good because the bearing size is larger. Bearings are a common size for easy replacement when time comes to replace the bearings (6203 RS).
Blower belt - how much difference in belt length on the ATI bracket than the Aster belt routing?
J Bracket - how is the bracket location designed to accomodate the extra width of the 10 rib pulleys?
Alternator - is there a clearance issue if upgrading to the larger housing of 145 amp truck alternator?

Differences between Aster Bracket and the ATI bracket:

It appears that the tensioner on the ATI bracket is proprietory vs a standard GM tensioner on the Aster Bracket.
Two pulleys on the ATI J Brackert VS three pulleys on the Aster Bracket.
The second idler pulley on the Aster bracket is only 1.75 inch in diameter with much smaller 6903 bearings compared to the 6203 bearings in the top idler 3.00 inch pulley. The smaller size bottom idler pulley on the Aster Bracket spins at a much higher rpm than the larger top 3.00 inch idler pulley on the Aster Bracket. The bearing will wear out faster on the small pulley.
I increased the size of the lower idler pulley on the Aster Bracket with a 50 mm (2 inch) CTSV pulley. The 50 mm pulley has larger 6203 bearings because the pulley is larger.
There are three idler pulley adjustment holes on the Aster Bracket compared to four on the ATI bracket (four holes makes it easier to adjust for belt stretch and/or belt length).

 

Good observations to consider for some 👍🏼

 

The water pump does not need to be replaced with the new ProCharger bracket with the H.D tensioner. I have sold several of the new 8 and 10 rib brackets but I haven't received much feedback yet from my customers. Thanks. Bob