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Stock 360 output

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Sonic Silver View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Sonic Silver Quote  Post ReplyReply Direct Link To This Post Posted: Dec/14/2017 at 6:01pm
Originally posted by scott scott wrote:

Call me crazy if you like, but I have to ask: Is it starting out in second gear, & not first, for some reason?
That's not really that crazy, and not impossible. It would explain things.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote WesternRed Quote  Post ReplyReply Direct Link To This Post Posted: Dec/14/2017 at 11:27pm
I am getting all gears, but the factory shifter certainly makes things a little interesting.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote WesternRed Quote  Post ReplyReply Direct Link To This Post Posted: Yesterday at 7:31am
Spoke to the local performance converter shop today and they didn't think changing the converter at this point in time was a good idea. Considering they charge $1,300 (Aussie dollars)for a good converter, they suggested upgrading other areas for more power first, then build the converter for the final combination. That means at least more compression and a lot bigger cam to go with it.

I'll be able to do some more testing tomorrow and can go from there I guess.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote tached_out Quote  Post ReplyReply Direct Link To This Post Posted: Yesterday at 10:18pm
Interested to hear how you did.

I don't think anyone asked you what your end goal is.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote WesternRed Quote  Post ReplyReply Direct Link To This Post Posted: Today at 6:00am
I can run 11.00 before I have to install a cage, so that is the goal, but not on this motor I guess.

Unfortunately I didn't get to run today, was a car show at the strip with some racing on the side. They decided at the last minute that they didn't want any trailer queens running, only "street cars" that were driven there, which was a bit annoying after being advised otherwise previously.

Anyway I did check a few things before heading down there. I made a better masking tape timing indicator and it looks like I have 15 degrees initial, plus 15 degrees mechanical, plus 8 degrees vacuum advance, so 38 degrees total. Would have been to test this and probably more initial without the vacuum advance to see what happens.

I did verify TDC with a dial gauge rigged up down the spark plug hole and as far as I can tell, it's pretty much spot on.


Also checked the plugs, which look pretty good to me:



Did a compression test:

1: 130
2: 130
3: 130
4: 130
5: 125
6: 120
7: 125
8: 130

Ok I guess for a stock 360 with 8.5:1 compression.

I have a leak down test kit but couldn't get that to work, I think it's broken and really a 2 man job as far as I can see, so gave up at that point.

Not sure what next other than seeing if it runs any better with more timing.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 70amcpwr Quote  Post ReplyReply Direct Link To This Post Posted: Today at 6:30am
Compression is down a bit for what you want to accomplish, good that all them besides #6 are very close though. Past history for me has shown 5+6 to be the lower compression cylinders on an older motor.   
70amcpwr You just can't fix stupid.
SOLD 1970 BBO Javelin, wifes 73 AMX 360 4spd. Next project 1969 AMX
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Post Options Post Options   Thanks (0) Thanks(0)   Quote WesternRed Quote  Post ReplyReply Direct Link To This Post Posted: Today at 7:10am
Ha ha, yes 11's would be the pipe dream when I build a 401 for it.

I'm probably deluded, but I was hoping I could run low 13's with bolt on mods on this motor. I don't think there is enough compression there to run the 280H (needs 9:1), 270H perhaps? I did just lash out on a Holley Sniper setup since I can use the 600 Holley from the Gremlin on my Jeep, which doesn't have a carby at the moment. Not sure if there is much to be gained by running the Sniper and Torker on the current 360 though.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote tached_out Quote  Post ReplyReply Direct Link To This Post Posted: Today at 2:11pm
You still don't have enough spark advance.

The 8 degrees vacuum you speak of, isn't there at wide open throttle. So you only have 30 when you need 38. You can ad that 8 degrees and quite a bit more to your 38.
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