What RPM's (max) should I be turning with my 350 Magnums?
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29 Scarab with twin 350/300hp Magnums. I'm having a problem getting over 4800rpm. If I trim the drives to pick up the lost R's I loose speed?
I'm stuck at 66.50mph - I did hit 70.03 @ 5100/52rpm but that was only once and I have yet to do it again
I'm stuck at 66.50mph - I did hit 70.03 @ 5100/52rpm but that was only once and I have yet to do it again
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I may be wrong but I think anything over 5000 rpms is to much for a 350. Even 5000 rpm might be to much for a 350. For a 502 5000 rpm is fine but I thought I read some where a 350 should run at about 4800 max rpm.
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Originally Posted by vandeano
I may be wrong but I think anything over 5000 rpms is to much for a 350. Even 5000 rpm might be to much for a 350. For a 502 5000 rpm is fine but I thought I read some where a 350 should run at about 4800 max rpm.
Wellcraft said 5150 rpm is perfect - (Those little chevy's spin like 2-strokes)
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I just looked it up in my manual and the max rpm for the 350/300 is 5000 rpm. If you are spinning it over that I would be careful of valve float and springs. The actual rpm range is 4600-5000.
John S.
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Originally Posted by 2 Trick Rick
29 Scarab with twin 350/300hp Magnums. I'm having a problem getting over 4800rpm. If I trim the drives to pick up the lost R's I loose speed?
I'm stuck at 66.50mph - I did hit 70.03 @ 5100/52rpm but that was only once and I have yet to do it again![Mad](/forums/images/smilies/mad.gif)
I'm stuck at 66.50mph - I did hit 70.03 @ 5100/52rpm but that was only once and I have yet to do it again
![Mad](/forums/images/smilies/mad.gif)
![Evil](/forums/images/smilies/evilB.gif)
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Originally Posted by hunster
Carb mags , 46-4800. Mag mpi's 5000. 66.5 mph is all we get! Running 23 mirage + W/mpi mags. Mag mpi's are rev limited I believe. Try running with the tide and you may break 70 again! ![Evil](/forums/images/smilies/evilB.gif)
![Evil](/forums/images/smilies/evilB.gif)
My one 70.01 run was down river, wind at my back with a light load of fuel and light wife
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But I'm still missing 200rpm ?? That could be another 1.5mph
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Off to the prop shop
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Originally Posted by 2 Trick Rick
My one 70.01 run was down river, wind at my back with a light load of fuel and light wife
...
But I'm still missing 200rpm ?? That could be another 1.5mph
Off to the prop shop![Roll Eyes (Sarcastic)](/forums/images/smilies/rolleyes.gif)
![Big Grin](/forums/images/smilies/biggrin.gif)
But I'm still missing 200rpm ?? That could be another 1.5mph
![Evil](/forums/images/smilies/evilB.gif)
Off to the prop shop
![Roll Eyes (Sarcastic)](/forums/images/smilies/rolleyes.gif)
![Evil](/forums/images/smilies/evilB.gif)
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Skip it, I just looked at my Gas Receipts from the weekend
3000rpm works best for me now.....
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Originally Posted by 2 Trick Rick
Skip it, I just looked at my Gas Receipts from the weekend
3000rpm works best for me now..... ![Mad](/forums/images/smilies/mad.gif)
![EEK!](/forums/images/smilies/eek.gif)
![Mad](/forums/images/smilies/mad.gif)
LMAO