Thread: Installing a blower on a flathead

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nother set

and the last in the set

I have to boost reference the carbs with a vacuum line coming from under the blower. Strange as it may seem, there is vacuum there when the throttle is closed. Just going by what I have seen in Car Craft and Hot Rod when dealing with roots blowers (and the Magnuson blower I have)...they always drill a hole into the power valve chamber and install a vacuum tube to control the vacuum outside of the carb. They plug up the vacuum line from the venturi baseplate with a set screw.

Also...just bought a BW T-10 to install..might hold up the blower installation for a while. Don't want to trash the floor-shift 3-speed when I punch the blower. Want to sell the 3-speed on ebay while it's still a good tranny!

built many blower engines under the blower is not a place s for vacuum other then maybe for you power valve boost ref or boost gauge and msd BTM mine has about 2 inchs at the intake base at idle 1200 rpm and 15 at the carb base every thing hits the fan when the boost gauge go s in to boost thats about 100 mph or abit more back tires start to scream

Hey Pat...thanks for the info. You are right...I will be hooking up the BTM, boost gauge and the power valve reference lines to the plate under the blower. But it only shows 2" ? My power valves will be open all the time then, right? Hmmmnn... so where would the best place be to run those lines?

Originally Posted by Ford Guy

Hey Pat...thanks for the info. You are right...I will be hooking up the BTM, boost gauge and the power valve reference lines to the plate under the blower. But it only shows 2" ? My power valves will be open all the time then, right? Hmmmnn... so where would the best place be to run those lines?

no my engine . is only 2 inchs not yours mine has a 714/714 dur@050...268/272 i can get the AFBs to do every thing i want it to do .i have work on blowers with holleys but for street i like the AFBs

Got the transmission and bellhousing bolted up. Had to fab 2 "ears" for the lower bolt holes and re-drill new places for the 2 uppers. Had the front bearing retainer sleeved to the inside diameter of the flathead throwout bearing. Next step is to get a new clutch disc to fit the T-10 input shaft. Mustang part will do. I hope these images are not too big. Next, I need to "install" the engine/trans to see where to cut the cross-member to fit the longer trans. Then, I need to reinforce the cut piece with a "u" shaped part bolted/welded underneath the trans. Also need to get a new lowered crossmember to locate the rear of the new trans. Driveshaft needs to be shorted...or get a new aluminum one made.

Got the trans. mounted and ready to put it in for placement issues

Update: Got the trans into the truck for position to build the crossmember and got the blower tensioner pulley figured out and installed. Just have to make the crossmember and then order the driveshaft. I'll road test the truck first, then take it down again for the blower install. Got lots of little things to do...fuel lines, regulator, linkage, etc.

Found an article in Car Craft explaining how to install a carb that's been modified so the power valve will open properly. Sounds like it goes against common thought, but when you really think about it....it's going to work just fine. All my carbs (4-barrel and 3x2's have been modified as per this article).

Also note...the 650HP ran fine without the modifications. Go figure!

Finished the trans install yesterday. Need to get driveshaft cut to fit new size. Going to run this with the old 4-barrel to sort out the transmission functioning at first. Then I'll finish installing the blower. While I had the motor out, I moved the electric fan blade 3/8" further forward to give me more pulley room (small but necessary detail!). Exhaust pipes will need to be re-routed because of the transmission bracket interference. Lotsa' work left to get this thing back on the road

Thanks for the updates! I was wondering what has happened to you, haven't seen you here in awhile. Hope you have a Happy New Year!

Happy New Year right back atcha'...and to everyone else. Keep it a safe one and let's have a great year building our rides!