Compression mostly, after 71 compression dropped off the charts, later models also had the cam retardedWhat was different about the 68/69 360HP version of the 429 versus the less HP versions? Is there a good website that goes through the differences?
The 1968-1971 429 had an advertsied hp rating of 360 gross horsepower. The real-world horsepower was around 320 hp.What was different about the 68/69 360HP version of the 429 versus the less HP versions? Is there a good website that goes through the differences?
Do you mean 4 camshaft deg and 8 crankshaft deg?The 1968-1971 429 had an advertsied hp rating of 360 gross horsepower. The real-world horsepower was around 320 hp.
In 1972, SAE hp ratings were changed from "gross" to "net" and so the numbers dropped accordingly from that alone. Additionally, the compression ratio in the 1972-up engine dropped from about 10:1 real world to about 7.5:1 real world, the camshaft timing was retarded 8 camshsft degrees (4 crankshaft degrees), etc.
your questioning a known engine builder ?Do you mean 4 camshaft deg and 8 crankshaft deg?
We are all known to make mistakes, The statement confused me, as I know who he is, and it goes against my own knowledge of the subject.your questioning a known engine builder ?
thought you were the expert retail
your question is also a statement .We are all known to make mistakes, The statement confused me, as I know who he is, and it goes against my own knowledge of the subject.
Why don't you add your knowledge here instead of pestering us with the high esteem you hold of your own knowledge.
to much typing for me , for the detailWell answer up DanH, which is the correct statement? 8 cam 4 crank or 4 cam 8 crank?
And please tell me why it's those numbers that took the power away if you can put it in words I can understand.
You know I'm not a motor head, I'm a restore guy but I know motors and engines very well, I just don't understand the "why" of it.
+1....I had a 69 429 2V thunderjet..I added a stock 4V intake,750 holley and a set of headers and that motor rocked!...One of my all time favourites..Compression mostly, after 71 compression dropped off the charts, later models also had the cam retarded
I will say this, that 360 horse motor, with nothing less than a set of headers, an intake, and a bit of cam is a very strong runner. Can't get much cheaper hp than that
work harden them p/r's with that hammer .I had the 4V version in a 69 Bird. It kept bending push rods. Was a very poor lad back then so I would just hammer them back as straight as I could. Ran strong though until the tranny gave up.
welcoming back the truie old KLUTZ.I am missing the :bicker: 'cause I have DanH on!!! IGNORE !!!
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Simply put, the 1968/1971 Passenger Car/CJ/Police 4V 429/460 were healthy and that all changed in 1972 (Fed Emission Regulations).
1973 was a little better but not by much.
My earlier post in this thread has some ambiguity. Sorry about that I type my posts fast, rarely proof-read them, and move on.Do you mean 4 camshaft deg and 8 crankshaft deg?
Correction: The retarded camshaft for 1972 & up carburetted engines is addressed at the crankshaft gear, not the camshaft gear.The retarded cam timing is included in a different cam gear issued for the 1973 model run to successfully use EGR.