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#1 |
Registered User
Join Date: Dec 2005
Location: White Rock Canada
Posts: 865
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getting pumped 383 with a th700R4 (4L60)
found some money and I'm a year ahead of schedule
hey guys looking for some input, I have a '72 3/4 Suburban. turfing the 350/350 and replacing it with the new stroker and trans. rated at 330HP and 415 ft.lbs. A remanufactured product from Jasper. I will be towing a soon to be ( I hope ) remodeled 1972 28 ft. Silver Streak trailer. the trailer weighs 700 on the tongue and 6000 dry weight. Staying with a SB for the gas mileage. I recall a statment from someone in this message board that a 383 isn't that reliable. has anyone used a 383 and what was your experience? thanks for the help, this site is great |
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#2 |
Registered User
Join Date: Aug 2006
Location: Bakersfield,CA
Posts: 7,893
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Re: getting pumped 383 with a th700R4 (4L60)
sounds like a good deal there
id love to see some pictures of the trailer ![]()
__________________
-steven Alte Seele S.S. "Allison" '72 C/10 LWB 350SB/TH350 - DD PITBULL IS NOT A CRIME |
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#3 |
Registered User
Join Date: Apr 2007
Location: St Inigoes, MD
Posts: 2
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Re: getting pumped 383 with a th700R4 (4L60)
I've got a 383 in my C-10 with World Heads. It did have to get rebuilt last year, but that was only because the guy who had the truck before me did NOT weld/bolt the oil pickup tube on the pump. The 383 is a very reliable engine as long as you take of it like any other engine. Just the other day I used her to haul 3100 pds of metal to the scrap yard. The only thing I would be concerned about is the 700r4. I've heard that older ones are weaker, but if you get a newer one to go in there it should be a little more reliabe. I've got a TH400 in mine.
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1967-72 C-10 LWB 383 Stroker/World Heads/750 Holley Avenger/Edelbrock Performer RPM Air Gap/TH400 "Yes, Thank you Captain Obvious |
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#4 |
Registered User
Join Date: Aug 2006
Location: Bakersfield,CA
Posts: 7,893
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Re: getting pumped 383 with a th700R4 (4L60)
theres nothing wrong with a 383
__________________
-steven Alte Seele S.S. "Allison" '72 C/10 LWB 350SB/TH350 - DD PITBULL IS NOT A CRIME |
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#5 |
Registered User
Join Date: Feb 2000
Location: Center City, MN, USA
Posts: 3,254
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Re: getting pumped 383 with a th700R4 (4L60)
I tow my 3000 pound bass boat with my th350 and 383 all the time.
With the 700r4 I'd tow that trailer in 3rd gear. You'll want to set up the 700 to lock up the converter in 3rd and 4th. That way when you tow you'll get the benefit of the locked up torque converter. Towing in 3rd is 1:1 through the tranny. If you use 4th you are using gears in there that aren't made for that much of a load. That is exactly why I went with a th350. I do most of my driving in that vehicle with a heavy trailer attached. Oh and install an external tranny cooler. If you are in the north (your signature says Canada), run the cooler lines to the external cooler FIRST then to the cooler in the radiator then back to the tranny. Guys in warmer climates should run them the opposite way.
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'70 cab, '71 chassis, 383, TH350, NP205. '71 Malibu convertible '72 Malibu hard top Center City, MN Last edited by mrein3; 05-04-2007 at 07:26 AM. Reason: ooops 3000, not 300 pound boat |
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#6 |
Senior Member
Join Date: Oct 2006
Location: Edmonton Alberta
Posts: 458
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Re: getting pumped 383 with a th700R4 (4L60)
my customers beat my 383s like a rented mule on a daily basis with no problems, they are as reliable as the parts that are put in them. I have built many 700s and like them but no longer use them for constant pulling as the pumps and converters dont like heavy loads. Not to say they all die but pulling is better left to a 400 or 4L80 instead.
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#7 |
Registered User
Join Date: Dec 2005
Location: White Rock Canada
Posts: 865
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Re: getting pumped 383 with a th700R4 (4L60)
thanks for the input guys. Feeling better with the 383 choice. tranny will be a newer one with the 3rd and 4th lock up. also a kick down switch, but maybe I'll re-think the tranny choice. The idea is to head south to the bigger shows and the next board meet. I want reliability.
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#8 |
Registered User
Join Date: Jul 2006
Location: Central PA
Posts: 12,201
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Re: getting pumped 383 with a th700R4 (4L60)
The guy that delivers my mulch has a 79 C-30 with a dump bed and a 383. He loves it and is glad he did that instead of the extra $$ to upgrade to a bigblock...
__________________
The Garage: 1968 K-10 SWB - "Project Money Pit" 1996 Z-71 - "huntin rig" 1969 C-10 LWB (SOLD) "Project flip that truck or else" 1993 Passport, F@rd 1-ton (SOLD)"Project Cousin Eddie" My Garage Build "The 1,000 footer" |
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#9 |
Registered User
Join Date: Apr 2007
Location: Fayetteville, NC
Posts: 83
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Re: getting pumped 383 with a th700R4 (4L60)
Yeah, Stay away from the 700's they are to weak for pulling. 400's is the way to go. A 383 is as reliable as a 350. If you like, I can set you up with my builder/ Mechanic. He is in NC very renouned and ownes a speed shop. He is one of the best mechanics on the east coast. Everytime I go there I feel like a kid and learn something new everytime. Did you know that even having the right headbolts can create more horsepower?
Brian
__________________
There is no replacement for displacement! |
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#10 | |
Sierra Grande Club
Join Date: Jan 2007
Location: New Mexico USA
Posts: 2,433
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Re: getting pumped 383 with a th700R4 (4L60)
Quote:
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__________________
1971 GMC Sierra Grande, 1/2 ton short wide, original 4 bolt 010 020 block & heads. (matching #'s). 383 stroker, SMI q jet 750 cfm, Lunati Voodoo 60102 cam, Scorpion roller rockers, Spin Tech pro street mufflers with X pipe. ![]() |
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#11 |
Registered User
Join Date: Dec 2005
Location: White Rock Canada
Posts: 865
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Re: getting pumped 383 with a th700R4 (4L60)
BAYER20, Thanks Brian. do you mind if I fax the build sheet to your buddy, maybe he can make some improvements. I'm listening, now I'm leaning towards the 4L80 intead............ unless I shut up and listen TH400 all the way?
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#12 |
Registered User
Join Date: Apr 2007
Location: Fayetteville, NC
Posts: 83
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Re: getting pumped 383 with a th700R4 (4L60)
Yeah no problem, I would suggest that you call them, Bob is the shop manger and Tony is the owner. Just tell Bob what you are trying to do and I’m sure he could forward your fax to Tony. They also do all their own machine work and can build you an engine just for your application, which is what I have them do. They have been doing this since the 60's I also find them very affordable for what you get. Call them at 910.485.7033 I would suggest to call them very early around 9am they usually get very busy during the day.
Oh, and to the guy that wants the 20hp head bolts…do your research before you leave a smart-ass remark!
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There is no replacement for displacement! |
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