bagged 77 Posted June 27, 2010 Report Share Posted June 27, 2010 Well to starts, i got a 77 620 long bed that i pulled out of the weeds about 7 months ago. i bagged it myself got it running pretty well myself and now i drive the piss out of it. heres when i got it and her it is now now to my question part. it has the 2.0 with the 4 speed . i topped this thing out out at 55 mph. well i wanna drive to arkansas next month to a truck show so i can just redo the rear end for high way or what all i got to do to run 65 or 75 comfortably Quote Link to comment
Pumpkn210 Posted June 27, 2010 Report Share Posted June 27, 2010 You could get a larger set of tires for the rear to make the gears higher. Or a 5sp would do it, not sure if there are different rear ends you can get. Sweet Truck, and Welcome to Ratsun! Quote Link to comment
69FJWagon Posted June 27, 2010 Report Share Posted June 27, 2010 you can pull a rear gear out of a 720 or HB pick up they came with a few different gear sets and the 720 had a gas saver gear set that was like a 3.50 gear but some of the HBs had a 3.70 and are probably easier to find... the gear ratio is listed at the bottom of the vin plate on the inside left fender side in the engine bay Clayton Quote Link to comment
sick620 Posted June 27, 2010 Report Share Posted June 27, 2010 5 speed with rear gear from 720.... WELCOME looks sweet!!!! :D Quote Link to comment
DISLEXICDIME Posted June 27, 2010 Report Share Posted June 27, 2010 55 something is wrong with your truck. My l16 powered 620 would do 95 Quote Link to comment
Skib Posted June 27, 2010 Report Share Posted June 27, 2010 55 something is wrong with your truck. My l16 powered 620 would do 95 word, I can hit 90 in my goon with stock (gutless) L16 and 4 speed Quote Link to comment
Laecaon Posted June 27, 2010 Report Share Posted June 27, 2010 My stock goon with L16 and 3spd auto hit 87mph loaded with all my crap for college. Quote Link to comment
banzai510(hainz) Posted June 27, 2010 Report Share Posted June 27, 2010 is the 2nd barrel opening up or is the distributor timmed? olddatsuns.com PS Glad you saved that datsun!!!!!!!!!!!!! Quote Link to comment
Creepy Cruiser Posted June 27, 2010 Report Share Posted June 27, 2010 Welcome! Love it. Quote Link to comment
I'm BLUE Posted June 27, 2010 Report Share Posted June 27, 2010 people also overlook plugged exhaust systems as well as a simple rule-out( rotted pipe internally occasionally , crappy or cheap mufflers i have seen fail as fast as 2 years ---- I end up cutting the things off or going to a free flow of some type , sometimes you can't tell until it has starting/powerband issues ) Quote Link to comment
DISLEXICDIME Posted June 28, 2010 Report Share Posted June 28, 2010 when my second barrel was not opening it took for ever to get to 65 Quote Link to comment
dat521gatherer Posted June 28, 2010 Report Share Posted June 28, 2010 55 something is wrong with your truck. My l16 powered 620 would do 95 word, I can hit 90 in my goon with stock (gutless) L16 and 4 speed My stock goon with L16 and 3spd auto hit 87mph loaded with all my crap for college. yep yep. i do 70mph at 4000rpm's with my l16 and 4 speed. i assume you guys are redlining at 90mph???? i can do 80+ but cant really look down at my tach when going that fast. Quote Link to comment
dat521gatherer Posted June 28, 2010 Report Share Posted June 28, 2010 my bad. welcome bagged77. looking good. Quote Link to comment
banzai510(hainz) Posted June 28, 2010 Report Share Posted June 28, 2010 also dial the motor up to TDC keeping the chain tite put crank on zero and ck the cam timming V notch is relation ot the dash on the cam tower. Maybe seombody replaced a timming chain and misalighned the chain thus putting thruck in the field. olddatsuns.com Quote Link to comment
bagged 77 Posted July 1, 2010 Author Report Share Posted July 1, 2010 thanks everybody , i havent been ignoring yall i just have limited access to internet. i put some gears in it out of a nissan hb rearend and made sure exhaust is flowing and hit 75 mph. the timing is still off and that will be next to do Quote Link to comment
datzenmike Posted July 2, 2010 Report Share Posted July 2, 2010 now to my question part. it has the 2.0 with the 4 speed . i topped this thing out out at 55 mph. well i wanna drive to arkansas next month to a truck show so i can just redo the rear end for high way or what all i got to do to run 65 or 75 comfortably If it tops out at 55 then you have problems that can't be fixed with a lower rear end. The stock '77 should be good for 90+ Quote Link to comment
FoxyRoadster Posted July 2, 2010 Report Share Posted July 2, 2010 looks good, nice to see the okie ratsun community growing at this rate we might have to have a meet. :lol: Quote Link to comment
intense 620 Posted July 2, 2010 Report Share Posted July 2, 2010 Nice truck and welcome to ratsun! :P Quote Link to comment
bagged 77 Posted July 4, 2010 Author Report Share Posted July 4, 2010 If it tops out at 55 then you have problems that can't be fixed with a lower rear end. The stock '77 should be good for 90+ with a lower rear end what are you talking about Quote Link to comment
FoxyRoadster Posted July 4, 2010 Report Share Posted July 4, 2010 with a lower rear end what are you talking about I think they meant a lower geared rear end wouldnt help your top speed issue and its an engine issue. You'll wana for sure get the timing fixed if you do a lot of highway driving Quote Link to comment
datzenmike Posted July 4, 2010 Report Share Posted July 4, 2010 The '77 standard or automatic would have a 4.375 ratio rear end. Even if it had a 4.875 it would still do 70 or better. 55 is just plain wrong. What gas mileage are you getting? Does it smoke and burn oil? Things to look at: Is the secondary opening on the carb? Is the choke stuck on? Quote Link to comment
bagged 77 Posted July 4, 2010 Author Report Share Posted July 4, 2010 I think they meant a lower geared rear end wouldnt help your top speed issue and its an engine issue. You'll wana for sure get the timing fixed if you do a lot of highway driving i didnt put lower gears i put higher gears. and thanks for the advice, im not that great at mechanics work, i like the old fashion cutting torch and stick welder =) Quote Link to comment
bagged 77 Posted July 4, 2010 Author Report Share Posted July 4, 2010 The '77 standard or automatic would have a 4.375 ratio rear end. Even if it had a 4.875 it would still do 70 or better. 55 is just plain wrong. What gas mileage are you getting? Does it smoke and burn oil? Things to look at: Is the secondary opening on the carb? Is the choke stuck on? i put a weber on it, and it doesnt burn oil or smoke, i dont think the choke sticks i can tell when it kicks off i believe like i said not a great mechanic and not thought of it as a engine issue so i will have to check those as best i can Quote Link to comment
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