What will it run with new convertor? Guess
Thanks for all the responses,I will be running it tomorrow.
Just got off work !!!
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.
Definitely has 60' issues and like you and others have said it needs more tuning and no doubt there.
I have spent little time with my car as I wanted too and always knew the convertor is one of my problems.This car comes on strong half way thru first and holds it to the end.
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.
I hear you,I running hi performance mechanical fuel pump and have a fuel gauge and have not installed it.
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 am correcting previous owner build and I like all of you all input...
I started this thread because I thought it would be fun to guess the outcome of just the convertor swap and in return get a lot of helpful input to get my car there.
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.
Agreed but I still think convertor should of been put in from the start!
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#.
Sure is !!!
I was expecting my very first run to be where I am now and with tuning to be in the 13's...First run was 15.08
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.
I will be ordering them soon ...A/F meter and jets.
It is rich !!!
What rpm have you been launching at?
What do you plan for rpm with the new converter?
2500 rpm and need to adjust my brakes to hold more.
May do a few launch at idle to see what she does.
Going to go tomorrow,less of a crowd !!!