Fageol Supercharger Build

[bob442]

were there any plans for internal work on this motor this winter?

[GM Ontairo]

Thanks for the comments guys. All the machine work was done by my dad. Without him I don't think I could have ever got this all together.

First off, welcome to the forum. Secondly, wow; that's a great build. I've read about the Fageol Supercharger & I've contemplated a purchase on my 86 T10 Blazer, but yet IDK. Ya did a great job!! Congrats on the setup it looks awesome!! I may take some pointers from here if I ever decide to build mine up. Did you just get a 3.1 crank from a camaro/firebird engine?? It all looks brand spankin' new!!. Late.

We bought a new crank but ended up having to get it custom ground because the '84 block has the small weaker journals. Neither my dad or I knew this and by the time we had the block all prepped for everything and we realized it, it was just easier/cheaper to get it ground to work.
I would encourage you to go with the Fageol unit. You might even be able to get one from Mark Fageol if you call him up. When we took this one apart to check it over it was nice to see how well it was engineered and put together. It's not some cheapo blower that is just slapped together. These things were designed to work well and last. Mark was telling me they put one on a truck and 100,000 miles later it's still working perfectly. - http://www.fageolsuperchargers.com/

were there any plans for internal work on this motor this winter?

No plans for the truck at all over the winter, it's sitting in our unheated garage with a cover over it. Being from Ontario the salt/snow will keep there until likely April. I do plan on throwing a different carb on it. The current one has vacuum secondaries and being under boost the secondaries never see the true intake vacuum. I plan on getting one of the holley's built specifically for the 671 blowers and just jetting it down. That should help with throttle response and make it a lot easier to tune. Currently it has a good 1/2 second lag when laying into it. In addition to that my dad is going to make up a smaller pulley to gain a little more boost.


If I do end up taking it back apart We'll likely put some different heads on it that aren't decked to lower the compression.
As far as building a forged* motor I haven't really seen any parts or places that sell them. Is there anything you could suggest please feel free.

[bob442]

a cam would be a great start

[GM Ontairo]

Yes that would be a great suggestion. I just realized now I never wrote it down but we did that in the original rebuild. We went with a comp cam 260/212. Thanks for pointing that out though.
The aftermarket for these motors isn't bad, but it is definitely limited. I'm at a point now where I can still do some things but my returns are diminishing. So after I change the carb and pulley I think that will be all. I wish there was more I could do but without going to a 34xx or doing a hybrid/turbo my options seem to be few and far between.

I'm always open to suggestions though.

[bob442]

yes, not being able to use that intake with a genII or III heads really sucks.

[Hard Driver]

Great project ! Builds on the 6's interest me much more than 8's and I have both. My next project is a 3.4 / 3400 [rwd 3.4 / 3400 fwd intake & heads] with turbo charger. I think the setup you're building can be reliable hp street machine and it looks like you're doing it right. Don't we all wish we had some training as a machinist ?

[bob442]

Yes that would be a great suggestion. I just realized now I never wrote it down but we did that in the original rebuild. We went with a comp cam 260/212. Thanks for pointing that out though.
The aftermarket for these motors isn't bad, but it is definitely limited. I'm at a point now where I can still do some things but my returns are diminishing. So after I change the carb and pulley I think that will be all. I wish there was more I could do but without going to a 34xx or doing a hybrid/turbo my options seem to be few and far between.

I'm always open to suggestions though.

get the heads ported out and raising the CR?

[GM Ontairo]

Hard Driver, thanks it's definitely be a great learning experience.

Bob, thanks for the suggestions. Right now it's running 9.5 compression which is a bit high for what it is. The intake and heads could definitely benefit from a port/polish. Right now it's just not something I'm in a huge rush to do. Last year I drove the truck for like a month tops so I would really like to just enjoy it for a while this year before I start tearing into it again. If I do change the heads I'll likely go back to a stock fi head to lower the compression to allow for another lb or two.

Currently I have a safe* size pulley on it and it makes at most 4lbs. I'm going to switch to a smaller pulley in the next few weeks and that will bring it up to around 7lbs. I picked up an msd 6al2 to go in combination with a blaster coil. I'm going to try and mess around with the plug gaps and see how it goes. I also need to get a blower carb or modify this one to suit.
I'm interested to see how it reacts to more boost. Worst case scenario I might pick up a small meth kit.

[bob442]

if you lower the CR and raise the boost, what do you really gain? if anything raise it and add more fuel, make more power.

[GM Ontairo]

There is a ton of variables that go into this complex equation. Low comp/high boost > high comp/low boost, applies more to turbos or charged air that is intercooled/aftercooled. When you are running say 10.5/1 compression you are really limited on boost before you get detonation, so say for example you are running 5#'s . Where as if you are running 8.0/1 compression and 25lbs of boost you are going to be making a good bit more power.
I'm trying to think of a really simple way to explain. Clearly the higher the compression the more heat there is. There is no way to remove that heat out of a high compression motor. Where with a turbo or blown motor you can run that compressed air through an intercooler and change the temp. Therefor you can run at a higher effective* compression ratio before seeing detonation. Once you get to a certain limit dumping more fuel into the system doesn't really help anything. It's more or less a band-aid. Now if you start injecting meth or race fuel at that point then there is more gains to be made.

I have no intercooler/aftercooler system so the effect of lower compression/higher boost would not be as drastic for my setup. However if I dropped my compression ratio a whole point I could definitely make a bit more power with more boost.

[2.8-350TBI]

Ive wanted to see a picture of the intake manifold w/o the blower to see if it is possible to use with a bigger blower than the fageol. Its just too small for anything bigger than a 3.1

Say, put it on a 3.4 with fuel injection and dis with an M62 or even an M90 and youd be getting somewhere

[GM Ontairo]

^ here are some pics. I didn't take many of just the intake. From what I've seen of the eaton blowers I don't think it would be possible without extensive to work to the fageol intake or a fabbed adapter plate. It would probably be better to try and make an edelbrock intake work with an adapter.



2.8-350TBI, are you the guy who did a crazy projector write up on s10forum?

[2.8-350TBI]

^ here are some pics. I didn't take many of just the intake. From what I've seen of the eaton blowers I don't think it would be possible without extensive to work to the fageol intake or a fabbed adapter plate. It would probably be better to try and make an edelbrock intake work with an adapter.

2.8-350TBI, are you the guy who did a crazy projector write up on s10forum?

Thank you for those pix man Now off to searchtime lol

No, I didnt do a projector write up lol. Hes on hidplanet, I forgot his Username, Im redoing my hids with new bulbs and housings and the ones on my pic are for sale.

I personally woulnt go for projectors on a first gen. They look good on second gens but not on first gens

I just run H4 hids through e code housings

[GM Ontairo]

^ oh ok, I saw that pic in your sig and it looked very similar to some pics the other guy posted in his write up. My mistake.

[GM Ontairo]

Picked up a new carb better suited for the blower,




Also got the MSD hooked up. I set the rev limiter at 4500. I'm a little uncertain as to what speed I can spin it up to safely. Any one have any input on this subject?