BillyGman I have lot's of time to sort through converter recommendations snow , ice , Canadian winter 6 months lol . I was curious what the quick here were running not expecting to buy converter specd on Chevelle forum.
Bob, I'd like to think I'm somewhat knowledgeable about Torque converters, but I am not an expert. I DO have some experience with converters though. I can tell you about a converter I put on a 4,200 LB street/strip car I had, which gave me a .70 ET reduction with the addition of the converter alone, but also a stall speed increase of 600 RPM. But that was a Lock-up converter on a late model car. So that's a whole different ball game.
As it was brought up here earlier in this thread, keep in mind that your itended purpous/use for the car is of utmost importance, and like Chris Straub has often stated in the past, it's all about the combination and how it works together as a whole. Having said all that, I don't get to the drag strip as much as I used to, and it's only to your advantage if numerous board members continue to chime in here to share what they have, and what has worked for them.
Jason, (aka "DragRacer") has one quick car, and I've heard some other guys say postive things about neal chance converters like he just did in this thread. Another guy that comes to mind is no longer on this board that I know of, and he has sold his Chevelle several years ago. But that is Bob West, (the guy who called his Green 71 Chevelle "the green Weenie"). You might remember him. He had a 505cid engine in his car, and he used to race it often, and the car usually did wheels up launches and ran low 10's, (10.0's and occassionally high 9's in the cooler weather). But from what I remember, he had that car running very consistent, usually with ET's and 60 foot times only varying from run to run by hundreths of a second on skinny rear tires (9" wide and 10" wide radial slicks) with footbrake launches. He ran 1.33 second short times.
Bob told me a number of things about his car, and I remember that he raved about the ATI Racing torque converter he had in the car which he spoke of. It was an 8" Tree Master MRT
converter shown here in the link below....
Racing Torque Converters for Drag Racing and Street / Strip use!
Bob told me that the ATI Tree Master MRT was one of the ingredients that caused his car to launch consistently. He said that when he installed it, the difference was very noticeable. Although I cannot remember what converter he had in the car before he installed the Tree master MRT. The thing is that it states on the ATI webpage that I linked to above^ that the TreeMaster is intended for cars with Transbrakes, but Bob did not have a transbrake. He always launched the car off the footbrake according to what he said when he was on here. So although that converter might be intended primarily for transbrake launches, that doesn't have to mean that it cannot benefit cars that are launched with the footbrake. But you really would need to speak to a tech guy at ATI, and hit him with questions, and right part numbers down too.
Another thing you would want to ask them is if the 8" or 10" would be better for YOUR application. Every vehicle combination is different, and it's the tech guys' and sales guys' job at any given converter place to get it right as far as recommending what is best for your car. Many places have software that they use to punch in your vehicle spec numbers that will tell them what any given converter will stall at RPM wise, and probably what stall speed RPM is ideal as well. But it's an educated estimation on their part, and the better they are at it, the better the chance of them getting it right for you, the end user, and for your car.
Getting back to Bob West's Chevelle, he told me his engine was puting out about 700 HP, but that was an educated guess on his part. But he also took a good amount of weight off the car too. He told me he went as far as to remove things like the heater ducts and blower motor, etc, (although I don't remember if he had the seats out of it). But I'm merely using Bob's car as an example. But I'm guessing that your car is a full weight A-body, so my point is, that the fact that Bob West took a good amount of weight off his car, is indicative that there were obvious differences in his combination and what you might have, or some other guys on here. He also ran 4.10 rear gears. It sounds to me like you might be intending to use your car slightly more on the street than Bob may have used his car.
If I were you, I'd call a few converter places just to talk to them and get recomendations and prices. And I wouldn't be afraid to ask them plenty of questions that I had ready and written down on paper ahead of time. If they aren't willing to explain their statements to you, or to answer all your questions, or they get short with you, or cop an attitude, then they aren't worthy of your biz. I surewould NOT be afraid to politely and respectfuly ask them to explain the reasons for their recommendation once they yield one. IMO when you choose a converter, you should be able to give yourself reasons why you did, other than to say: "well self-announced expert Joe Blow at the converter place said I should use this one". That's JMO.
Vinny Laurita's 572 cid powered 70 Chevelle was also a high 9 second car that Launched incredibly hard but also and consistent. I saw that car run at the track in Lebanon Valley, NY. That car was a heavy 3,900 LB ride that ran consistent 1.3 second short times, but I do not know what converter he used, (probably one of the few things I didn't know about his car). Sorry for the long reply. I hope this helps.
Everything from a 9.5" to a 13".
Customer doing 8's in a heavy car using our converter. Car runs faster than it did with a NLU PTC converter and drives better.
Interesting Jake. Thanks for the pic. I used to race a strret/strip Panther car, (more street than strip) nd those cars are 4,200 LB tanks without driver. I don't know if that Panther is a full weight car, but judging by how the interior looks in that video, it might very well be. I bet he doesn't have the original Ford 8.8 rear in that car. Lotsa the full weight Panther cars end up swapping it out for a Ford 9" rear when they get up to the power level he must be at.
I don't build converters, but I have tested more than a few. My experience with Neal Chance Racing Converters was very good for custom converters and dialing in a converter for a combination.
I've heard good things About Chance converters. Since you're making the very respectable power you are with that small block mill, and without a power adder, I'm guessing that you're winding it up fairly high. Is it an 8" converter you're using with a high stall speed? I'm just curious because the numbers in your post sig are very impressive!