350 meg not performing up to par ?
04-30-2018, 09:53 PM
#11
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She little dirt but cleans up nicely
trying to get the thing to at least 450hp 450tq
what do you guys think about port matching the stock exhaust manifold to the AFR heads ? Exhaust ports are about a 1 3/8 and the stock exhaust manifolds are about 11/4inch
Last edited by hotshot537; 04-30-2018 at 10:31 PM.
05-01-2018, 12:18 AM
#12
She little dirt but cleans up nicely
i’ll try that over the weekend.......but what I think it is exhaust is cutting it back. Going to put through transom exhausted this week. and also if I could find some used headers try to0
trying to get the thing to at least 450hp 450tq
what do you guys think about port matching the stock exhaust manifold to the AFR heads ? Exhaust ports are about a 1 3/8 and the stock exhaust manifolds are about 11/4inch
Your thru prop exhaust is not limiting the motor to 4300 rpm. Your prop is. Thru hull will allow your motor to breath better above 5000 rpm.
Don't waste your money on exhaust manifolds over what your have. Ryan, myself and others have spun strokers well north of 5000 rpm with GLM style manifolds.
Don't waste your time port matching. There will be zero difference.
A prop is a simplest fix. Go back to your original prop see how things go. You may not need a new prop.
05-01-2018, 10:44 AM
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have the valves been lashed properly, where is the timing set
05-01-2018, 01:43 PM
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some edelbrock carbs have a small orifice on the end of the emulsion tube on the secondary boosters....when running larger secondary jets the end of the tube becomes the restriction...not the jet...this can contribute to lean WOT operation.
something to look into
something to look into
Last edited by SS496; 05-01-2018 at 01:45 PM.
07-02-2019, 08:09 PM
#18
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As others have stated you are currently overpropped. With SBC head/cam/intake upgrades you are better off keeping the same prop and simply spinning it faster. You might go up a little in pitch but not a lot.
Your thru prop exhaust is not limiting the motor to 4300 rpm. Your prop is. Thru hull will allow your motor to breath better above 5000 rpm.
Don't waste your money on exhaust manifolds over what your have. Ryan, myself and others have spun strokers well north of 5000 rpm with GLM style manifolds.
Don't waste your time port matching. There will be zero difference.
A prop is a simplest fix. Go back to your original prop see how things go. You may not need a new prop.
Your thru prop exhaust is not limiting the motor to 4300 rpm. Your prop is. Thru hull will allow your motor to breath better above 5000 rpm.
Don't waste your money on exhaust manifolds over what your have. Ryan, myself and others have spun strokers well north of 5000 rpm with GLM style manifolds.
Don't waste your time port matching. There will be zero difference.
A prop is a simplest fix. Go back to your original prop see how things go. You may not need a new prop.
07-09-2019, 04:59 PM
#19
She little dirt but cleans up nicely
i’ll try that over the weekend.......but what I think it is exhaust is cutting it back. Going to put through transom exhausted this week. and also if I could find some used headers try to0
trying to get the thing to at least 450hp 450tq
what do you guys think about port matching the stock exhaust manifold to the AFR heads ? Exhaust ports are about a 1 3/8 and the stock exhaust manifolds are about 11/4inch
07-09-2019, 05:08 PM
#20
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