RPM loss on engine rebuild
09-23-2010, 02:37 PM
#12
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09-23-2010, 02:54 PM
#13
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Most people run 34-36 with a set up like yours. It's best to use a piston stop to find TDC. On engines with a lot of use, the ring on the dampener can move. Iron Eagles do flow well and should make more hp. I would go back to that Dart intake as well.
09-24-2010, 02:00 AM
#14
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Did you ever bump the timing up????
I agree, go back to the Dart intake. The Edlebrock may make better torque down low, but will loose to the Dart in the upper rpms.
I agree, go back to the Dart intake. The Edlebrock may make better torque down low, but will loose to the Dart in the upper rpms.
09-24-2010, 09:39 AM
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Another thing to keep in mind, given your cam and components, your engine probably makes it's peak hp in the 5600-6000 rpm range. Re-propping or re-gearing seems like a good idea.
09-24-2010, 10:06 AM
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Fixx
you have too much cam for your engine,,changing intakes is not going to help at all!!!!! you will still be at the same rpm in the big end.. before you change anyting try putting the old carbs back on..you went from 800 cfm carbs to 750 cfm when you did all the up grades..bump the timing and try the old carbs first..
check your spark plug's after a hard run,,i bet their white...what jets are you using in the carbs?? in the 800 cfm carbs i think the stock jets were 72-84?..you put in a bigger cam and better flowing heads,, the engine will need more fuel which i think you may be lacking. my guesstimate would be a 850 cfm carberator would put you @ 5200 rpms and which is the max rpm for that engine..
check your spark plug's after a hard run,,i bet their white...what jets are you using in the carbs?? in the 800 cfm carbs i think the stock jets were 72-84?..you put in a bigger cam and better flowing heads,, the engine will need more fuel which i think you may be lacking. my guesstimate would be a 850 cfm carberator would put you @ 5200 rpms and which is the max rpm for that engine..
Last edited by FIXX; 09-24-2010 at 10:18 AM.
09-24-2010, 11:59 AM
#18
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you have too much cam for your engine,,changing intakes is not going to help at all!!!!! you will still be at the same rpm in the big end.. before you change anyting try putting the old carbs back on..you went from 800 cfm carbs to 750 cfm when you did all the up grades..bump the timing and try the old carbs first..
check your spark plug's after a hard run,,i bet their white...what jets are you using in the carbs?? in the 800 cfm carbs i think the stock jets were 72-84?..you put in a bigger cam and better flowing heads,, the engine will need more fuel which i think you may be lacking. my guesstimate would be a 850 cfm carberator would put you @ 5200 rpms and which is the max rpm for that engine..
check your spark plug's after a hard run,,i bet their white...what jets are you using in the carbs?? in the 800 cfm carbs i think the stock jets were 72-84?..you put in a bigger cam and better flowing heads,, the engine will need more fuel which i think you may be lacking. my guesstimate would be a 850 cfm carberator would put you @ 5200 rpms and which is the max rpm for that engine..
09-24-2010, 01:50 PM
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PS, I'd go back to the dart intake. But it wont give you 1000 RPM. However, bolting on a supercharger might!
