Author Topic: A newbie with a question  (Read 919 times)

Offline rw74cuda

  • Jr. Member
  • **
  • Posts: 3
A newbie with a question
« on: June 27, 2010 - 10:59:38 AM »
Hi:

I'm new to the MOPAR world and this forum and have a question.  I'm considering buying a 74 cuda w/mid 60's 440 30 over balanced blue printed solid cam engine equipped with a 850 Barry grant carb and  w/2 1/2 side exhaust. It also has a 727 with 3800 converter and Dana 60 w/373  gears. 

I plan on using the car strictly for the street and pleasure driving.  From the information provided, my questions are:

1.  would the current setpu be "streetable"?
2.  not that its a big concern, I have to assume relatively low MPG.  Is that right?
3.  if the current setup is not "streetable", what are suggested changes?  I, myself, am not sure the 3800 will
     make for a friendly street car.

Any input will be greatly appreciated.

thanx





Offline BIGSHCLUNK

  • Sr. Resident
  • ******
  • Posts: 9341
  • Miss NIKKI - were you this hot at 48?
Re: A newbie with a question
« Reply #1 on: June 27, 2010 - 11:09:57 AM »
Personally I think that converters a bit much for steet use. That thing will be using some gas thats for sure. But could be lots of fun!!  :burnout:
70 Chally R/T Convertible- Yes she's really got a HEMI, no she's not a Charger!
                                             [o o o o]
                                                  OO
                                                  OO 
                                              [o o o o]
https://www.aanddtruckautoparts.com/
http://www.facebook.com/pages/A-D-Truck-and-Auto-Parts/67427352555?ref=hl

Offline HP2

  • Resident
  • *****
  • Posts: 4478
Re: A newbie with a question
« Reply #2 on: June 27, 2010 - 11:57:57 AM »
What kind of cam does it have? If it doesn't need that 3800 convertor, changing that would go a long way to improving street manners, although it could be a lot of fun.

Yes, mileage will likely be single digit.

Offline the_engineers

  • Resident
  • *****
  • Posts: 2639
  • Cheap, fast, reliable...pick 2
Re: A newbie with a question
« Reply #3 on: June 27, 2010 - 06:24:07 PM »
My understanding of converter stall (feel free to correct me if I'm wrong) is that the 3800 is at WOT.  If you're driving around at part throttle, say 50% then the converter will motivate the car at 1900 rpm.  Basically, the easier you drive it, the more streetable the converter will behave.

3.73's might be a tad steep, but then again I'm running 3.91's with a 27" tire.
Brooks

1971 'Cuda 360
2004 Infiniti G35 6-spd Coupe
2001 Toyota Solara Convertible
2002 GMC Savana 1500 Explorer Hightop Conversion
1972 Dodge Dart Swinger...keeping the Slant.  Rocking the turbos.

Offline rw74cuda

  • Jr. Member
  • **
  • Posts: 3
Re: A newbie with a question
« Reply #4 on: June 27, 2010 - 06:46:58 PM »
Unfortunately, I'm not that well versed on stall converters.  I've been digging info. up about them.  One thing that concerns me is the heat buildup while the converter is slipping.

Offline Chryco Psycho

  • Administrator
  • C-C.com Guru
  • *****
  • Posts: 36620
  • 70 Challenger R/T SE 70 tube Chassis Cuda now sold
Re: A newbie with a question
« Reply #5 on: June 27, 2010 - 07:03:02 PM »
the cam converter & stall all need to match rpm wise , you may need to swap out the cam & converter to make it work they way you want

Challenger - You`ll wish You Hadn`t

Offline rw74cuda

  • Jr. Member
  • **
  • Posts: 3
Re: A newbie with a question
« Reply #6 on: June 27, 2010 - 07:12:38 PM »
I'm trying to get info. on the cam.  All I know is that its a solid lifter cam.

Offline HP2

  • Resident
  • *****
  • Posts: 4478
Re: A newbie with a question
« Reply #7 on: June 28, 2010 - 10:04:41 PM »
My understanding of converter stall (feel free to correct me if I'm wrong) is that the 3800 is at WOT.  If you're driving around at part throttle, say 50% then the converter will motivate the car at 1900 rpm.  Basically, the easier you drive it, the more streetable the converter will behave.


Yes, the flash stall is 3800 and you can get the came moving as low as 1500 rpm. However, until the rpm exceeds its rated stall, it is generating loads of slip and the associated heat along with that slip. Your also giving up large amounts of efficiency in the process as well.