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IMO, I don't think you're going to notice much, if any, change from tightening the conv up 150 rpms.

The conv I used after building my 406 was the same 8" Coan that I had behind my 377 I had in the car and it stalled 5500-5600. I felt it was too loose based on the mph, and engine rpms. Sent it back to Coan and gave Dave the info, he agreed and tightened it up 300 rpms and it was as close to perfect as could be. Shifted at 6800 rpms.
 

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Discussion Starter #23
Maxey - Somewhere around 700 HP is my est., did not get it dyno. Here is what my DynoSim5 software is showing
58359


Horndog,
I get one free re-stall / stator change so if I need to go lower I will. The nice thing about this new bolt together converter is I can change the stator myself, they are $140 each. TSI told me that I needed a min. of 6000 stall so I told him to go with that to start and we will see.

I called the guy that sold me the cam and he is now telling me that I need it to stall around 5600-5800 and shift lower. When I bought it he told me 6000 stall and shift around 7000...
 

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Maxey - Somewhere around 700 HP is my est., did not get it dyno. Here is what my DynoSim5 software is showing


Horndog,
I get one free re-stall / stator change so if I need to go lower I will. The nice thing about this new bolt together converter is I can change the stator myself, they are $140 each. TSI told me that I needed a min. of 6000 stall so I told him to go with that to start and we will see.

I called the guy that sold me the cam and he is now telling me that I need it to stall around 5600-5800 and shift lower. When I bought it he told me 6000 stall and shift around 7000...
Our setups are so close ..... I think you've got more ET and mph gains in yours. Just going to be finding the right combo of rear gear and conv stall.
 

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Ran a best of 5.72 at 117.5 mph with a 1.21 60'. Picking up the wheels 10 to 12" now! Ran great all season!
View attachment 57896
Congrats! Thanks for the post and update. I am putting together a very similar set up to yours. Hope I can run close to yours. I am a little heavier at 2845 but i have a little more head, intake, cam and gear. Again congrats. I'm hoping for anything 5.9x to 6.0x et range.
 

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My boy has set of those from yrs ago.His deal is 4.135x3.825.He runs [email protected]+120.+ at 2930 lbs.He shifts it at 8000 area but last I knew had over 400 runs on it.Adjust valves after every nite ,changes oil every 3 nites.6900 stall.We are doing new manifold and carb and going to move cam from 105.75 to 107 on intake for next season.
 

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You are only 200 lbs. more than mine, so you should be 70's or 80's with more motor. Let us know. Can you give us more details on your setup?
1964 Chevy II Backhalfed ladder bar with 12 bolt. Currently 5.86 gears but switching over to 5.13.
Glide with brake and 1.76 first gear.
6000 rpm convertor.
Sbc 817 casting decked at zero
Eagle 3.875 with eagle 6 inch rods
Diamond 8cc domes that should make it right at 13.5 to 1.
Pontiac 867 casting 23 degree sbc heads with 2.08/1.60 and lots of work. 68 cc chambers. Custom Sheetmetal tunnel ram intake for single 4500. Holley 1050 dominator set up for race gas.
Bullet Solid roller 275/283 and 710/675 lift with 1.6 and 1.5 rockers.
111 LSA.
Like you I like the 1/8 mile and it's about all we have left around us here in Texas. Can run big tire but I currently have a 29.5x10.5 on it because I like the feel of it better. I'm currently working on getting motor together. I'm making one motor out of two with some parts I had. Really enjoyed seeing your results as our set up is similar. Thanks again!
 

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Like those old 867 heads.we have pair here that are milled to where no longer seal on intake seat.
Yeah, everything I read about them is encouraging. Bought them on a 406 that I was told made 740 on dyno. I saw sheets of 668hp on the motor when it was freshened up by a shop in Houston. I never got the 406 to run right or close to either of those numbers so I pulled it apart and found multiple issues. I will never buy used motors again. Lesson learned. Hope they do well for me on this 421. Thanks for your comment.
 

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We ran those for yrs.Kept working our combo with them .Had 660 hp on 4.060-3.625 deal at first attempt.Kept reworking upper end package made 760 hp with 4.155 - 3.750 deal.If we had what we know now ,I think we would of broke 800 with them also.
 

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We ran those for yrs.Kept working our combo with them .Had 660 hp on 4.060-3.625 deal at first attempt.Kept reworking upper end package made 760 hp with 4.155 - 3.750 deal.If we had what we know now ,I think we would of broke 800 with them also.
Damn! thats good results. Im just hoping to make 700. LOL!!!!!!
 

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The AFR 220's comps flow more then my old 235's did...
[/QUOTE.Im never concerned with flow but what area and valve I can get in the given head to use.If that is addressed I will have plenty of flow.I am not arguing with your results.I think you did well with the afr heads.I would just rather have the 235 castings and go from there.We never leave anything alone.Good luck with your project,keep up the good work..
 
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