1971 360 question
- Thread starter Wicked4659
- Start date
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Professor Fate
Push the button, Max...
As noted previously, @halifaxhops is da man to talk to.
Wicked4659
Member
Thanks.
Seen them come up on face book
Should have bought it
Not hard to do...but lots of playing
Should have bought it
Not hard to do...but lots of playing
Your 750 will be fine. I'd prefer a 750 double pumper on it.
QuickDart360
Well-Known Member
I run a rejetted/retuned thermoquad 850 cfm. And it runs superbly! My 360 is hot cammed 292 mopar stick and still idles well.
With all these responses, only one person pointed out that your '71 360 is a unique engine. As pointed out, it has higher compression pistons. What has not been mentioned is that it shares the same casting with the 340. 340: 4.040" bore. 360: 4.000" bore. That means you can bore that '71 360 out 0.100" and still have the same meat around the cylinders as a 340 bored 0.060' over. With smaller over-bores, core shift really doesn't matter much. Dude, you got a killer "race" block there!
I can do it with all OEM parts if needed PM me.
Wicked4659
Member
Thanks, the motor appears to have been in a builders stock for this purpose. The motor seems off, but runs really hard. As soon as the weather breaks here, I'll start tinkering with it. Thanks to everyone for their input/help.
neilyoung561
Member
my personal opinion is to stay away from MSD You can upgrade your ignition control box for more RPM and if you brake down it can be easily changed on the side of the road I installed a 650 on my car and it was a big improvement Just took some time to set up Just my personal opinion
Wicked4659
Member
Dusters look great in Plum Crazy!
Wicked4659
Member
Just an update, the Holley 750 works perfectly and the car really responded to it. The vacuum is 10 and the power valve was a 6.5 so I installed a 4.5 and everything works great. The only issue I'm chasing is the idle. I set the timing and adjusted the idle mixture screws, but the idle in gear is about 700 rpm and in neutral, it's around 1100-1200 rpm. I'm thinking it's a vacuum leak somewhere.
Newbomb Turk
Well-Known Member
neilyoung561
Member
i did have a problem with my throttle linkage with the holly the cable never had enough travel are you able to have full travel on your gas peddle?
neilyoung561
Member
you should be able to get idle down to 700
With that big of an RPM jump going to drive, it may need more initial timing.
Do you care to enlighten us on what you would have chosen? I know that popular advice is half of idle vacuum but that's been something of a "horseshoes and hand grenades" setting in my own experience.
Holley 20-7 Holley Throttle Lever Extensions | Summit Racing
Wicked4659
Member
1/2 the vacuum on a PV is the standard. Even Holley states that on their videos and tech support. I had a 6.5 PV in it originally and it would bog off the line, now it doesn't. The only issue now is the idle. There is a big difference in the idle between P or N and in drive.
Hmmmmm, didn't check that, but when I mash the gas peddle, it launches.
Wicked4659
Member
The timing is off the scale, not sure where, but I would guess around 20 degs.
Newbomb Turk
Well-Known Member
Are running ported or non ported vac advance....
Alright. So I'll take that to mean "The timing is where it is all else be damned and I'm not gonna verify a damn thing" Sounds good to me. Have fun with it.
I'm good, thanks. LOL
Holley has been wrong about power valve selection going on 50 years, at least as long as I've been involved with cars.
You have a tune up problem with 400-500 rpm drop from p/n to in gear. Hillbilly timing tape the balancer so you know where you sit for initial and total timing.
You have a tune up problem with 400-500 rpm drop from p/n to in gear. Hillbilly timing tape the balancer so you know where you sit for initial and total timing.
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