KnuckleDuster
Well-Known Member
What rpm have you been launching at?
What do you plan for rpm with the new converter?
What do you plan for rpm with the new converter?
Definitely has 60' issues and like you and others have said it needs more tuning and no doubt there.The car has 60' issues. It's roughly .2 slow right now for the 1/4 MPH. If the 60' comes around the car could pick up as much as .75 second or better. It could go as good as 13.00 or better when sorted out as it sits. The converter should pick it up in the front half. It runs pretty good on the back half.
If it got to the 1.8's or better in 60's a high 13 is capable. Then it's off to wittle it down. Timing, jetting, squirters all that fun stuff. Get the front end as loose as possible to transfer weight. Abodybomber has a good set of numbers to hope for in this case. If you get over 100 MPH, that's a 13.20 or better in a solid chassis.
I hear you,I running hi performance mechanical fuel pump and have a fuel gauge and have not installed it.What do you have for a fuel system?
Do you know how much fuel pressure you have thru the traps?
Needs to be around 6LBS.
This could be why the MPH is down.
Not enough fuel pressure isn't always identified by stumbles or high speed engine miss.
An engine could just lay over.
The convertor will for sure give the bottom end a boost, if the tires hold.
I'm thinking 13.90's & 60ft in the 2.00 range.
Agreed but I am correcting previous owner build and I like all of you all input...Something isn't right that car should be quicker...have a friend with a '70 dart "smog motor" 318 stock bottom-end .477 cam j heads 1.88/1.60 valves weiand dual-plane intake edelbrock 600 carb headers dual exhaust..has been 13.75
Agreed but I still think convertor should of been put in from the start!I said basically the same thing in post 2, but was told 75 mph trap speed is "moving" for what it is. No point in pointing out I have been 8.90s with a smog 318 and a OPEN 3:23 rear on street tires, in a duster. Oh well, he will pick up if he keeps tuneing on it.
Sure is !!!Post #5
http://www.forabodiesonly.com/mopar/showthread.php?t=224050
It doesn't take gear and a bunch of other stuff to run in the 12's and high 100's mph with an auto. It takes a good converter and chassis. Post #10
http://www.forabodiesonly.com/mopar/showthread.php?t=154106
I drove all the time with an 8" converter on the street. 28" tire, 3.23-4.56's depending on car. Use a large plate style cooler and go if concerned with heat. Converters are not the mush rings they used to be.
I agree that something is off with the current set up, especially down low. Timing, pump shot, launch method. I'd expect the build to make at least 375hp/400ish tq. Should be good for a mid 12 at high 100's mph even at 3500#.
I will be ordering them soon ...A/F meter and jets.Do you have an A/F meter?
Take some jets with you and I'd jet it down from stock if it has 70-72 F/R. It may be really fat which would hinder the car from accelerating.
2500 rpm and need to adjust my brakes to hold more.What rpm have you been launching at?
What do you plan for rpm with the new converter?
Do you know what's in the carb now for jetting?
Find someone, anyone that has jets both 2 and 4 sizes smaller than what's in there now. Any old holley carbs laying around you can swipe jets from.
Closed chambered especially quench stuff usually doesn't like more than 34* of total timing.
Between timing and jetting alone, it could be off 50hp... DAMHIK!!!
Had an engine that was 1 point rich on jetting, 35 hp gain at peak when it was right. 4 degrees off in timing 15 hp. That alone is worth a LOT of real estate covered at the track.
You'll get it sorted out.
My shop was real busy today and I am one mechanic down,got nothing done on the dart,and it was raining off and on...Do you know what's in the carb now for jetting?
Find someone, anyone that has jets both 2 and 4 sizes smaller than what's in there now. Any old holley carbs laying around you can swipe jets from.
Closed chambered especially quench stuff usually doesn't like more than 34* of total timing.
Between timing and jetting alone, it could be off 50hp... DAMHIK!!!
Had an engine that was 1 point rich on jetting, 35 hp gain at peak when it was right. 4 degrees off in timing 15 hp. That alone is worth a LOT of real estate covered at the track.
You'll get it sorted out.
Replicaracer
Maybe I was unclear. At 96ish in the quarter, that teener is moving, and shows that the combo is making a good power to weight ratio.
At 75 in the 1/8, you would be right, its a bit lazy. But the OP is taking steps to remedy that.
Sorry if I came off as other than helpful.
Up until last time I was shifting by ear...NO TACHWhat rpm are you shifting at? With that cam and heads I would think you should be shifting around 6500 or more. My magnum 5.2 has 210/[email protected] cam an ported magnum heads ([email protected]) and I shift it at 6200. That's where I had my best mph.
No offense here...My car is a dog in 1/8 mile,,,at least it was !!Hey no problem, no offense takin by me. I have only ever run 1/8th mile, so the 1/4 mile numbers I don't think about as much. I do think the convertor is going to help quite a bit, I am guessing is it ends up 60 footing about 1.8 or so and running 8:90 or so, at about 78 MPH.... not sure what 1/4 mile would be like.
Okay ..why you need a trailer..lolBummer...
Maybe next weekend we can take both cars.
Might see if my Dad wants to go and throw mine on his trailer if he's in town.
Only thing that suck for me is re-opened track that is crowded....
Last time and first time at San Antonio Raceway I got 3 runs in from 6-11pm because I cheated and ran with slick only cars...street cars got 2 runs...
Okay like my build thread says "Drive Like You Stole it... I did and I will...."
Only thing that suck for me is re-opened track that is crowded....
Last time and first time at San Antonio Raceway I got 3 runs in from 6-11pm because I cheated and ran with slick only cars...street cars got 2 runs...
Okay like my build thread says "Drive Like You Stole it... I did and I will...."