Boss 429 cam help

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Boss 429 cam help

Post  rmk57 on January 26th 2016, 6:49 pm

Looking for something a little hotter than stock.

Motor is all original with long tube headers and 850 d/p Holley.

Want to keep it solid lifter, no rollers.

Not the most popular engine these days to be ordering a cam for.


Randy


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Re: Boss 429 cam help

Post  dfree383 on January 26th 2016, 7:00 pm

surprisingly their are quite a few of them around now with the reproduction parts being available the last few years.

The cam is the same core as any 429-460 385 series engine, so its not special.

with the good exhaust ports these heads have and headers, I'd look at a single pattern cam say something in the 240 @ .050 with mid .500 lift.
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Re: Boss 429 cam help

Post  rmk57 on January 26th 2016, 7:37 pm

Something like this?

comp cams 282s-


SOLID − Good for street machine with
2000+ converter and headers. 9:1+
compression. Mild rough idle.
.022 .022 2000 to 6000 34-341-4 282S 282 282 236 236 .570 .570 110°

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Re: Boss 429 cam help

Post  dfree383 on January 26th 2016, 8:23 pm

rmk57 wrote:Something like this?

comp cams 282s-


SOLID − Good for street machine with
2000+ converter and headers. 9:1+
compression. Mild rough idle.
.022 .022 2000 to 6000 34-341-4 282S 282 282 236 236 .570 .570 110°

That wouldn't be bad if you just want something off the shelf. Might talk with a few people about something custom ground too, before you buy.
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Re: Boss 429 cam help

Post  supervel45 on January 26th 2016, 10:11 pm

 I would go with this one if you want a little more lopey idle. With the lash on a mechanical cam they seem a little bigger than they are compared to a hydraulic one.

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Re: Boss 429 cam help

Post  supervel45 on January 26th 2016, 10:14 pm


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Re: Boss 429 cam help

Post  dfree383 on January 26th 2016, 10:19 pm


An FE cam ain't gonna work
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Re: Boss 429 cam help

Post  res0rli9 on January 26th 2016, 10:23 pm


That says it for an FE

dfree hole shot me Rolling Eyes

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Re: Boss 429 cam help

Post  rmk57 on January 26th 2016, 10:48 pm


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Re: Boss 429 cam help

Post  dfree383 on January 26th 2016, 11:05 pm


Just my opinion.... But I'd stick with the next one down. Boss 9 heads are pretty big on 429" and the 282 lines are a lot more aggressive than the old school stock ones.

another mod that's s bunch of power is induction, a modern single plane like Kaases is worth a bunch of power, but it could be a packaging issue on a stock mustang.
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Re: Boss 429 cam help

Post  supervel45 on January 26th 2016, 11:12 pm

Sorry about the FE link, I saw that and went back with the 460 one but, something must have gone wrong, it said 429-460 when I tried to paste it.

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Re: Boss 429 cam help

Post  BOSS 429 on January 27th 2016, 1:30 am

come on guys, .570 lift - .036, ratio -.018 or so for lash, then head growth= about ,510 lift or so, stock boss 429 cam is .508 lift


and the dur would be lost as well
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Re: Boss 429 cam help

Post  dfree383 on January 27th 2016, 10:19 am

BOSS 429 wrote:come on guys, .570 lift   - .036, ratio -.018 or so for lash, then head growth= about ,510 lift or so, stock boss 429 cam is .508 lift


and the dur would be lost as well

The factory Lobes are nowhere near as aggressive and its a stock B9 not a race car. I'd bet the modern cam is worth at least 20-30hp and would still be nice and drivable.
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Re: Boss 429 cam help

Post  rmcomprandy on January 27th 2016, 11:58 am


What amount of valve lift will your valve springs allow...?

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Re: Boss 429 cam help

Post  rmk57 on January 27th 2016, 1:17 pm

rmcomprandy wrote:

What amount of valve lift will your valve springs allow...?

That's a good question. I also don't know what piston to valve clearance would be with that cam either.

The engine has been balanced, ARP rod bolts, headers, 850 Holley, that pretty much it.

90% of these cars are pushed on and off trailers at car auctions so there's not much info on

Any kind of performance mods for a stocker. The builds you see in magazines are usually Kasse strokers that aren't much use to me.

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Re: Boss 429 cam help

Post  rmcomprandy on January 27th 2016, 6:15 pm

rmk57 wrote:
rmcomprandy wrote:

What amount of valve lift will your valve springs allow...?

That's a good question. I also don't know what piston to valve clearance would be with that cam either.

The engine has been balanced, ARP rod bolts, headers, 850 Holley, that pretty much it.

90% of these cars are pushed on and off trailers at car auctions so there's not much info on

Any kind of performance mods for a stocker. The builds you see in magazines are usually  Kasse strokers that aren't much use to me.

Randy

If you don't know those things then I would have something custom ground to be near OEM lift and duration but, with a bit more aggressive lobe profile.

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Re: Boss 429 cam help

Post  BOSS 429 on January 27th 2016, 7:27 pm

dfree383 wrote:
BOSS 429 wrote:come on guys, .570 lift   - .036, ratio -.018 or so for lash, then head growth= about ,510 lift or so, stock boss 429 cam is .508 lift


and the dur would be lost as well

The factory Lobes are nowhere near as aggressive and its a stock B9 not a race car. I'd bet the modern cam is worth at least 20-30hp and would still be nice and drivable.

-------------



never had race car in mind, I just want it to run good for the op
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Re: Boss 429 cam help

Post  rmk57 on January 27th 2016, 8:15 pm

I could mock the engine up with the stock cam and check p2v clearance.

That should show me what I could get away with, right?


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Re: Boss 429 cam help

Post  FalconEh on January 27th 2016, 9:04 pm

rmk57 wrote:I could mock the engine up with the stock cam and check p2v clearance.

That should show me what I could get away with, right?



Yes...It may be off topic but it sounds like the heads are off...do they have hardened seats?
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Re: Boss 429 cam help

Post  rmk57 on January 27th 2016, 9:40 pm

FalconEh wrote:
rmk57 wrote:I could mock the engine up with the stock cam and check p2v clearance.

That should show me what I could get away with, right?



Yes...It may be off topic but it sounds like the heads are off...do they have hardened seats?

They come with stellite seats from the factory, so your good to go with unleaded fuel.


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Re: Boss 429 cam help

Post  supervel45 on January 27th 2016, 9:52 pm

rmk57 wrote:I could mock the engine up with the stock cam and check p2v clearance.

That should show me what I could get away with, right?

It should give you a good idea.

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