No Juice

iTrader: (11)

So there are a lot of 370's, 390's, and 408's out there with blowers.

What are guys doing on F-body's about the missing bolt hole on the iron blocks for the alternator mounting location?

I found these two threads but there has got to be more?
https://ls1tech.com/forums/forced-in...ore-boost.html
https://ls1tech.com/forums/forced-in...t-bracket.html

I don't want to just run with out it.

LS1RedZ

iTrader: (19)

I just drilled and tapped my block.

No Juice

iTrader: (11)

That works for one of the mounting holes, what about the other missing one?
The iron block is missing two mounting holes, one just needs to be drilled and tapped as you stated, the other is simply not there. See photos below

Aluminum block




Iron Block

Taubr Unit

iTrader: (32)

Here's how I did mine. I also drilled and tapped my block. It drills and taps really easy, blocks must be a soft metal.

Here's the link to the old set up I did..

https://ls1tech.com/forums/forced-in...t-up-pics.html

No Juice

iTrader: (11)

But in the 3rd photo down in that link, I only see two bolts holding the alternator bracket on, (standoff locations 2 & 3 in the photos I posted above).

Since the j-bracket bolts to the alternator bracket, techincally there are only two bolts holding the blower on. Correct?

Am I missing something?

Taubr Unit

iTrader: (32)

Ya I didn't have the 3rd middle bolt on so it was bolted to the block with the 2 bolts. I damn near stood on it and it didn't flex or anything so it would've been fine but never ran it to be 100% sure, just 99.999% sure, lol.

k_cash1432

iTrader: (9)

Just the two holes are more than enough for the alternator if you use the brackets on the back of the alternator to hold it in place. I have done it for my last two LS swaps and havent had a single problem

SKULL

iTrader: (7)

its just an alternator. it has very little resistance and having two mounting points will be more then enough. its the route we went on a friends 6.0l turbo car

Taubr Unit

iTrader: (32)

I think he's wondering about the extra weight of the Procharger hanging off the front of it vs just the alternator. But as I stated, it was way strong when my Procharger was hanging off the front of it.

No Juice

iTrader: (11)

This is refering to f-body procharger kits, not turbo cars. The blower bracket bolts to the alternator, technically the alternator bracket.

I'm not so concerned with the weight, I am concerned about only two bolts holding the blower and the stresses it will put on those long bolts. These cars are already cursed with a bracket that flexes a bunch, then if you take away one of the three mounting locations, it will be worse.

No Juice

iTrader: (11)

You have done this with a procharger j-bracket as well?

I8UR4RD

iTrader: (16)

I have a hard time understanding what you did Tabur. Maybe its because I partied too hard at new years last night.

Taubr Unit

iTrader: (32)

Lol maybe. What you confused on?

k_cash1432

iTrader: (9)

No exprience with a J-Bracket but, with the bracket on the back of the alternator it will definatly keep the bracket from flexing.

Bob@BruteSpeed

iTrader: (16)

I have never run into a problem with the one hole in the bracket not being used. We ran my iron block with it this way, both with the stock J bracket at 18 psi and then when we came out with the cog bracket, back at the old shop. Bob

No Juice

iTrader: (11)

Bump to see if there are any more opinions out there............

I8UR4RD

iTrader: (16)

If I am available when mine is done, I will get a video and some pics of how its done, for others too see. You would expect a really detailed writeup on it somewhere but its just not there but I dont think its really that hard to begin with. mess it up though, and i bet your in deep do do

No Juice

iTrader: (11)

So you are going to weld a plate and additional bolt hole, or what is your plan?

k_cash1432

iTrader: (9)

https://ls1tech.com/forums/forced-in...e-boost-4.html
Post #72 Look at that see if that will make you sleep better at night...

Monte4ever

iTrader: (2)

Now that's extreme right there. But if you have the talent why not I guess.