If you want to V-belt, go for it.
Broncitis":2x8g4mct said:
I think you could get by with a two groove pulley easily and have one made easily, the hard part is if you come right off the crank you will need a 8.75 crank pulley and a 3.8 pulley on the blower to get about 6-7 psi and a 3.4 pulley to pull about 9-10 psi, which will make all other components spin way faster than stock, water pump, power steering, alternator, etc, if you start getting into the really small pulleys on the blower is where the v belts won't flex as well around the pully as a serpentine, on the m90 if I remember correctly once you get down around a 2.9 pulley you have to machine the snout down on the m90 to get the pulley on. All figures based on m90. If you accomplish this, you will not regret having done it, the v8's can't touch you through the first two gears, but they catch me at the end.
Wot he said^^^^
That is the only 200 cube for M90 answer. In that he gave target boost at 5000 rpm, target ratio, target sizes, everything. And he told us not to stretch the overdrive relationship past those limits. Eatons have to be massively over driven to work on any car, and that pushes the bending and flexural stress of any v belt to the maxiumum. A 6 rib belt would widdle all over it and never slip. But that is the answer above.
Problem is that you can't just use the stock 1978-1983 Fox set up using two 11a1195 V belts, the stock 6" Fox Balancer, the stock alternator pulley, and the stock 5 3/4 York, Tecumseh/Motorcarft A/C pulley size to drive the M90. You'll have next to no boost at a 1.04:1 ratio with that blower. That would be slightly over driven ratio as the standard Fox 200 balancer is about 6" outside diameter. The Water pump pulley is about 6.5". Under that senario, no boost, and ancillaries happy to survive as normal.
When you use an 8.75" balancer, you then have to overdrive the water pump and alternator, and then go to a 3.4" pulley. So its all a balancing act. Then you have to package it without anything colliding. Since you can't go below 3.4" and have the belts live, then you can't combine, say, a 2.9" pulley with a 6" crank balancer either. 2.6:1 is the higest ratio for 10 psi at 5000 rpm with an M90.
Normally, when one uses the smaller replacment 3G alternator, they swap out the stock 6 rib serepentine belt, and instead find an earlier 2 V belt arrangment like
JackFish did.
See
viewtopic.php?f=7&t=62869&hilit=3g+swap
If you first do the Four Eye Ford forum 3G swap he listed, you just use the stock Grand Marquis verson
Then use the Australian 1993 OHC 6 rib harmonic balancer, which bolts right on any 200, and then find the right length replacement serp belt.
Mike showes the standard pullies he would like to sell for a kit, but its 200 specific, and that may mean some Fox problems, with their different water pump length. If you are using an Ogura SC12 or 14, it can go where the old York Tecumseh/Motorcarft A/C unit sat in standard late 200 cube installations...the passenger side. An M9O might fit if you can make it suit the Broncitis strictures. Ford did lots of funny stuff over the years with a/c units, some were dealer options which sat the unit on the drivers side, v8 style. Some 250's had nice big Fridadaire units, which have good space set asside for an M90.
If you are M90 on the drivers side or passenger side, you just have to follow the Broncitis set up in his SC3300 Classic Inlines EFI Early Bronco.
In his post quoted above , he
gave the right pulley sizes.
Baldrick eliminated the whole water pump, used the Davis Craig remote water pump items, and with the stock easy to get 6 rib belt, your dough was bread.
