|
Why does tunnel ram work so good on BBmopar not others?
#170274
12/18/08 09:00 PM
12/18/08 09:00 PM
|
Joined: Jul 2003
Posts: 4,763
Holland MI Ottawa
2boltmain
OP
master
|
OP
master
Joined: Jul 2003
Posts: 4,763
Holland MI Ottawa
|
So why does the tunnel ram work so well on the mopar B and RB but not on others? Dork I knew ran one on his BB chevy pro street camaro and said it would lay down till about 4000rpm and then scream. I had an M1 tunnel ram on a Challenger with 2 500cfm ebrocks. 509 cam and a 10 to 1 shortblock. The thing made power all over. Is it because mopar heads are a velocity torque head? As far as I know small block mopars do not benefit from a T ram like the big blocks do.
Keep old mopars alive.
|
|
|
Re: Why does tunnel ram work so good on BBmopar not others?
[Re: MLR426]
#170277
12/19/08 02:07 PM
12/19/08 02:07 PM
|
Joined: Jul 2003
Posts: 4,763
Holland MI Ottawa
2boltmain
OP
master
|
OP
master
Joined: Jul 2003
Posts: 4,763
Holland MI Ottawa
|
I know you guys like my Rob Wolfe-ish wig but what about the tunnel ram question? What do people in the know have to say?
Keep old mopars alive.
|
|
|
Re: Why does tunnel ram work so good on BBmopar not others?
[Re: Stanton]
#170283
12/19/08 04:18 PM
12/19/08 04:18 PM
|
Joined: Oct 2004
Posts: 16,477
Canada
CrAzYMoPaRGuY
I Live Here
|
I Live Here
Joined: Oct 2004
Posts: 16,477
Canada
|
Quote:
I've had tunnel rams on both a 383 and a 440. Both were dogs at low RPM and forever backfired and blew powervalves in the carbs. I think the 383's issue was a poor cam selection. Neither of them would start without first wearing down a battery. Could never figure if it was a lack of fuel or flooding !! I've had enough of tunnel rams. Can't beat the visual impact though !!!
Wow.
Not trying to be mean or anything, but you had issues that were easy to solve.
I've ran 2x4bbl tunnel rams on TONS of vehicles, my Demon was driven year round, in the snow, in the freezing cold, whatever. Started first crank every time, drove like a dream even when cold started.
My work truck was a tunnel ram 2x4bbl- as was my wife's daily driver, for years and years.
I strayed the course when I bought my Jensen Interceptor, it will be a first for me- I went with a lowrise 2x4bbl Edelbrock #5440 (CH28) and two Edelbrock 500s.
I've never ran a lowrise dual quad before, but I want everything under the hood...
CrAzYMoPaRGuY
|
|
|
Re: Why does tunnel ram work so good on BBmopar not others?
[Re: roadrunninMark]
#170286
12/19/08 06:21 PM
12/19/08 06:21 PM
|
Joined: Jul 2003
Posts: 4,763
Holland MI Ottawa
2boltmain
OP
master
|
OP
master
Joined: Jul 2003
Posts: 4,763
Holland MI Ottawa
|
Yes that is a PowerMullet wig I wore for Halloween. Even Weiand does not recommend their tunnel ram on a street driven 440. Sure would have been interesting to see how well the Offenhauser T ram would have done with 2 Holley carbs in that magazine dyno shootout some months back. The Weiand cleaned house.
Keep old mopars alive.
|
|
|
Re: Why does tunnel ram work so good on BBmopar not others?
[Re: CrAzYMoPaRGuY]
#170288
12/19/08 09:44 PM
12/19/08 09:44 PM
|
Joined: May 2003
Posts: 6,560
Downtown Roebuck Ont
Twostick
Still wishing...
|
Still wishing...
Joined: May 2003
Posts: 6,560
Downtown Roebuck Ont
|
The reason I've been told they work so well is that the runners are about as close to an ideal length as you can get with an OOTB intake. This is from Don Dulmage's website http://www3.sympatico.ca/big-d/index.htm " Tuned length of an intake runner. Runner length is not an exact science because of the variables involved but a rule of thumb formula I often find handy for sorting out manifolds is from Philip H Smith (Tuning For Speed) It states that: the intake runner should be approximately equal to 90 divided by the RPM in thousands or 90/rpm in thousands = length in inches ie for 6000RPM 90/6 = 15 inches ie for 7000RPM 90/7 = 12.85 inches. The measurment is taken from the intake valve to the plenum area. If your current 440 Mopar manifold seems too short now for your RPM range you're beginning to get the picture. " CrAzYMoPaRGuY if you read the 2x4 section of the site he especially likes the 6pak Weiand T-Ram that he converted to 2x4 which looks like the one you have. Lots of good budget minded info on the site. Kevin
|
|
|
Re: Why does tunnel ram work so good on BBmopar not oth
[Re: ScottSmith_Harms]
#170299
12/21/08 05:00 PM
12/21/08 05:00 PM
|
Joined: Jan 2003
Posts: 17,918
Akron, Ohio
ProSport
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 17,918
Akron, Ohio
|
My old DartSport had an M1 single plane and 1050 Dominator running in the 10 flat range with a best of 9.96 on a real cold day.
I switched to an M1 low deck tunnel ram with 2 750 Quickfuel carbs and the car was a whole new animal. It started and idled better in any kind of weather as long as it was over 35 degrees. Ran consistant 9.90's with a best of 9.88. Footbraked to a 1.36 60 foot, this was an 11 to 1 compression 451 with the MP 590 purple shaft solid cam.
1970 Challenger, all aluminum 528 Hemi, HDK suspension, Tremec 5 speed manual
|
|
|
Re: Why does tunnel ram work so good on BBmopar not others?
[Re: quickd100]
#170302
12/22/08 11:11 AM
12/22/08 11:11 AM
|
Joined: Jul 2003
Posts: 4,763
Holland MI Ottawa
2boltmain
OP
master
|
OP
master
Joined: Jul 2003
Posts: 4,763
Holland MI Ottawa
|
In the early 90s Edelbrock made a "Street" tunnel ram for mopar small block. It was not as tall as a Weiand or the early Edelbrock units. They only made them a few years.
Keep old mopars alive.
|
|
|
|
|
