Tunnelram and power Brakes?

-
L

lodaddy

Member
Joined
Dec 14, 2010
Messages
19
Reaction score
0
Location
Aurora
I know there are a ton of opinions out there about T-rams however I'm only asking about running one on a 340 in a 74 Swinger that has the power brakes/Booster. Possible? Unrealistic? thxs
 
works good,just a mather of not using the biggest cam in the catalog,you know the one on the bottom of the last page,the one that comes in a box with cutouts for the lobes;)
realy not a problem
 
duster340 said:
works good,just a mather of not using the biggest cam in the catalog,you know the one on the bottom of the last page,the one that comes in a box with cutouts for the lobes;)
realy not a problem
Click to expand...
agreed ,not a problem.and even if you ran a grind that was on the edge vac wise,you could run a reserve tank.
 
I'm surprised there isn't more experimentation with "hydroboost" systems, or diesel vehicle vacuum pumps.

Years ago you could get dual-diaphragm fuel pumps to help out vacuum wipers. Why could you not "series wire" a mechanical fuel pump to your vacuum booster, and use only electric pump for your ----fuel?

I don't think it's the tunnel ram, by the way. "It's the cam"
 
A tunnel ram hasn't a thing to do with whether you can run power brakes. It's all about whether the camshaft will allow the engine to generate enough vacuum to do it. If the camshaft isn't too radical it'll run power brakes just as well as with one carburetor.
 
67Dart273 said:
I'm surprised there isn't more experimentation with "hydroboost" systems, or diesel vehicle vacuum pumps.

Years ago you could get dual-diaphragm fuel pumps to help out vacuum wipers. Why could you not "series wire" a mechanical fuel pump to your vacuum booster, and use only electric pump for your ----fuel?

I don't think it's the tunnel ram, by the way. "It's the cam"
Click to expand...

hydroboost is a blessing, but I am having belt issues running it off my factory style pump wears out a belt a summer (not too bad) (put the hydroboost together with all used parts not kit)
 
Thxs to all for the replys. I've test/tuned the 340 on my test stand but was stumbled when I started to pull the ol'teener and noticed the that there is no provision for the brake booster on the T-ram. Thats the gist of my problem and inquiry. What to do now to make this work. Thxs again
 
you can drill and tap the plenum for a 1/4 npt barb fitting.or use one of the 3/8 manifold vac fittings on one of your carbs.
 
I heard tunnel rams are very hard to tune for the street--good luck. Around here we have 1 min. red lights and then the people SLOWLY drive off, I run dual carbs on an old D-64 intake but I would not dream of using a tunnel ram, it would foul the spark plugs up at a min.
 
well - you you heard wrong...

i've been running a t-ram for 7 years on the street and never, ever fouled a set of plugs -
 
Indeed. Tunnel rams are very streetable as long as everything is in tune properly.......especially the old Edelbrock Street Tunnel Ram.
 
lodaddy said:
Awesome! I'm trying to avoid any drilling and tappin'
Click to expand...

Buy two 1/2" spacers that fit your carbs. Drill a 1/2" hole for the vacuum fitting on the rear spacer and you should be good to go. As others said, if you're pulling less than 10-12" of vacuum, you'll have a problem no matter what manifold you use. You may even be able to find a spacer with a pre-drilled and tapped hole. if you don't have the tools, send the spacer to me and do it for ya.

IIRC, I have seen electric vacuum booster pumps.
 
66plyValiant said:
all factory pulleys, the hydroboost slows the pump down so much that it can cause the belt to slip. but otherwise it works way better then normal power brakes
Click to expand...

You have a gut feeling as to why? Severely mismatched pump pressure?
 
dodge freak said:
I heard tunnel rams are very hard to tune for the street--good luck. Around here we have 1 min. red lights and then the people SLOWLY drive off, I run dual carbs on an old D-64 intake but I would not dream of using a tunnel ram, it would foul the spark plugs up at a min.
Click to expand...

dont thrust everything you hear, a tunnelramed motor isnt harder to tune compared to a singelcarb :) and they dont foul sparkplugs at all,they run great and looks very cool,and after running one for some time you can just smile at those saying they heard that a tunnelram is a pain:toothy8:
 
dodge freak said:
I heard tunnel rams are very hard to tune for the street--good luck. Around here we have 1 min. red lights and then the people SLOWLY drive off, I run dual carbs on an old D-64 intake but I would not dream of using a tunnel ram, it would foul the spark plugs up at a min.
Click to expand...
have you ever run one?ive never had any issue with mine.
 
66plyValiant said:
yes I believe most if it is the pump can't handle the demand. it should have a higher volume pump put on, that will be in the works for this year
Click to expand...

I'm thinking it might be the OTHER way around, that is, the pump comes up a huge restriction when you use the hydro, and the bypass in the pump is either too high pressure, or can't bypass ENOUGH volume, so the pump is trying to work against high head pressure
 
You must log in or register to reply here.
-

Back
Top