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#1
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Progression Ignition tunes
This can be the place to talk about Progression Distributor(s) and to share your ignition tables that work for you and your combination.
I just got my HEI setup and running and would love to see what others have done and would like to share.
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1971 Trans Am - Sold 1977 Can Am - Sold 2002 Trans Am Firehawk - Sold 2004 GTO - Sold 2006 GTO - Sold 1970 GTO - Sold 1972 Trans Am - Sold 1970 Trans Am - Current Project |
The Following User Says Thank You to TA-71 For This Useful Post: | ||
#2
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A lot of what can be done hinges on these details that you should post up about your car.
1) CID. 2) compression. 3) Cam. 4) rear gears.
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I do stuff for reasons. |
The Following User Says Thank You to 25stevem For This Useful Post: | ||
#3
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Very good point. My combo: 455/TH400, 9.2:1 compression, Comp xe268h cam, 3.08 rear.
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1971 Trans Am - Sold 1977 Can Am - Sold 2002 Trans Am Firehawk - Sold 2004 GTO - Sold 2006 GTO - Sold 1970 GTO - Sold 1972 Trans Am - Sold 1970 Trans Am - Current Project |
#4
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I don’t have one yet but I may pick one up in the next month or two. I’ll be following this regardless
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1977 Trans Am 400/4speed (swap) Brian |
#5
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Can we add:
Carb) brand & size Intake) Look forward to the progression and the trends/differences with builds. Sent from my SM-G988U1 using Tapatalk |
The Following User Says Thank You to LT4USMC For This Useful Post: | ||
#6
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461/9.7 static comp
6X4 approx. flow 250cfm 850 MD w/annular T2 w/1” tapered 4 hole spacer 700R4 w/lockup 3:42 Crower solid flat tappet approx. spec w/1.65: 244/252@50 0.525/0.551 112 LSA 91 Octane/ 0% ethanol After a lot of testing (still not done though) heres the best map so far with my combo. Last edited by Formula jg; 03-28-2022 at 09:54 PM. |
The Following User Says Thank You to Formula jg For This Useful Post: | ||
#7
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What cylinder heads?
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#8
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I edited my original post to add head info (keep it all together).
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#9
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Thanks, my timing requirements changed dramatically when I switched from 6X to Kauffman D ports.
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The Following User Says Thank You to firechicken For This Useful Post: | ||
#10
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Quote:
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1971 Trans Am - Sold 1977 Can Am - Sold 2002 Trans Am Firehawk - Sold 2004 GTO - Sold 2006 GTO - Sold 1970 GTO - Sold 1972 Trans Am - Sold 1970 Trans Am - Current Project |
#11
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Has anyone used the Aggressive mode when creating a table? it seems to move all the timing numbers up quite a bit.
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1971 Trans Am - Sold 1977 Can Am - Sold 2002 Trans Am Firehawk - Sold 2004 GTO - Sold 2006 GTO - Sold 1970 GTO - Sold 1972 Trans Am - Sold 1970 Trans Am - Current Project |
#12
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New guy here. My Progression distributor arrives Friday and I'm looking forward to putting it on. Been doing a lot of reading on timing for this car, just trying to come up with a base curve for starters. Here's my specs...
461 (original block) Eagle forged rotating assembly, balanced 9.75:1 compression (verified by builder) Original #12 heads, completely rebuilt but not ported or worked over heavily, screw in studs. Original iron intake XE284 cam. I know it's not well loved here, but my builder (Rick Johnson in Crete, IL) swears by it so I trusted him. I do run high ZDDP oil (Lucas Hot Rod). Quadrajet built to the engine specs (supposedly) 3.55 rear gear M20 no AC I can only get 91 octane here, so I've been mixing to get 93 or so. Would love to be able to run pump 91. Car currently makes about 9 inches of vacuum at idle. and likes about 20 degrees initial advance. I had to back that off to 16 due to hard starting. Yeah, that's an electric vacuum pump for the brakes. Any suggestions for a base curve , or some tips would be most welcome! Currently shooting for 20 initial and 34 total, all in at 3200rpm. I'll bring the total up and RPM down if it seems to tolerate that. Car seems to like to idle around 650-750, and I like the lumpy idle down there, so win win I guess. This is a street driven weekend fair weather car, will probably never see a track. It was a full rotisserie restoration so I just have too much money into it, and it's sentimental to my wife (her dad's car). |
#13
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Quote:
Good luck..report back on the progress!
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466 Mike Voycey shortblock, 310cfm SD KRE heads, SD "OF 2.0 cam", torker 2 373 gears 3200 Continental Convertor best et 10.679/127.5/1.533 60ft 308 gears best et 10.76/125.64/1.5471 |
#14
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Quote:
Start retard capability is built into the Progression distributor.
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1970 Lucy TA | 461 | M20 |
The Following User Says Thank You to Captain Obvious For This Useful Post: | ||
#15
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I would start off with 32 total in light of your 9.75 comp/ iron heads and the fast cylinder pressure rise of the 4.210" stroke.
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I do stuff for reasons. |
The Following User Says Thank You to 25stevem For This Useful Post: | ||
#16
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I got my distributor installed this afternoon, started up, and sent a table. I think I've been consuming way too much internet and overthinking everything.
Given the details on my engine above, thoughts on this curve/map as a start? Idling at 800, but it doesn't just stay there rock steady, moves around within maybe 30rpm of 800 up and down or thereabouts. Unfortunately due to weather I can't take it out for a test drive right now but she seems to start up and idle nice.
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1970 Lucy TA | 461 | M20 |
#17
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Got my distributor installed, idle set, table created and sent. Thoughts on the below table for the build I listed above? It's idling at 800, not steady which I think I should expect due to the cam, but between maybe 770-820 or so.
Any advise or feedback is welcome. I can't take it for a test drive right now due to weather unfortunately.
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1970 Lucy TA | 461 | M20 |
#18
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1970 Lucy TA | 461 | M20 |
#19
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Just ordered the HEI version of this. I'm wondering if I should talk to my engine builder about using it for break in and dyno pulls/tuning or just have him use my current dist and then I would install this myself. My concern is if he hasn't used one before is it going to complicate things for him vs just let him do his normal process?
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70 TA, 467 cid IAII, Edelbrock D-port heads, 9.94:1, Butler HR 236/242 @ .050, 520/540 lift, 112 LSA, Q-jet, TKX (2.87 1st/.81 OD), 3.31 rear https://youtube.com/shorts/gG15nb4FWeo?feature=share |
#20
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I'd ask him; tell him what it is. If I were a builder I'd be pretty stoked to be able to input exactly what I want for a curve in, rather than dealing with weights and vacuum stuff. Plus I'd get to try out the tech for free. The interface is super easy. Or maybe he's old school and isn't interested, which is fine too.
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1970 Lucy TA | 461 | M20 |
The Following User Says Thank You to Captain Obvious For This Useful Post: | ||
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