a few direct performance questions
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Senior User
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a few direct performance questions
how much better is the msd ignition than the duraspark II? i have tfi now and i am getting rid of it and going to the non feedback carb. what are the benifits of port and polish on a 300? does it mess with the torque curve at all?
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Joined: Dec 2004
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From: centeral Ohio
Well with msd ignition you probably won't notice a huge ammount of difference. Most people say that the only noticable difference is better throttle response.
Most people say that you shouldn't loose any low end power with a minor port & polish. You will gain some extra rpms. possibly up to about 4,500 depending on the ammount of porting work done.
Most people say that you shouldn't loose any low end power with a minor port & polish. You will gain some extra rpms. possibly up to about 4,500 depending on the ammount of porting work done.
Postmaster
Joined: Feb 2003
Posts: 3,441
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From: Muskegon, MI (home)
I added a few num nums to my 300 in an 84 F150 4wd 4 speed. I added a set of EFI manifolds/ Walker downpipe, Cliffords 2300 Holley adapter plate, Holley 350 cfm 2bbl carb, K&N air filter, MSD Blaster TFI coil, 8.5mm wires, platinum plugs. That pretty much covers the external goodies I have added, I had the block punched .040 over, RV cam, HV oil pump, Clevite bearings, Sealed Power rings, it is running stock 8.5 to 1 pistons, stock crank and rods. Just my .02
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Joined: Jun 2002
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From: redding U.S.A.
JimMorrison- i thought you were dead..?
bigbrown- mild porting and polishing should not detriment low end torque. It should improve your all around torque, and also allow the motor to continue making torque a bit higher in the rpms.
bigbrown- mild porting and polishing should not detriment low end torque. It should improve your all around torque, and also allow the motor to continue making torque a bit higher in the rpms.
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If you can afford the msd, get it.
Cheap, yet better option than running a duraspark II module and durasparkII distributor....get a HEI 4 pin module off a mid 70's GM 350 ($20 brand new), get a mid 90 f-150 tfi coil ($20 brand new) and use a duraspark II distributor...this does make a noticable difference in cold starts. There is a fella over on another inliners forum...he actually tested the gm module vs the duraspark II, he said the difference was very noticable. I converted my durapark II equipped truck to the gm module/ tfi coil...cold starts and idle improved big time. Whether it made a difference when driving is beyond me...who can feel 5-10 extra hp.
IMO, you can't go wrong though if you can afford the msd, I like it just as well and it less homemade looking than the HEI conversion, there are how toos on the net though if your interested.
Cheap, yet better option than running a duraspark II module and durasparkII distributor....get a HEI 4 pin module off a mid 70's GM 350 ($20 brand new), get a mid 90 f-150 tfi coil ($20 brand new) and use a duraspark II distributor...this does make a noticable difference in cold starts. There is a fella over on another inliners forum...he actually tested the gm module vs the duraspark II, he said the difference was very noticable. I converted my durapark II equipped truck to the gm module/ tfi coil...cold starts and idle improved big time. Whether it made a difference when driving is beyond me...who can feel 5-10 extra hp.
IMO, you can't go wrong though if you can afford the msd, I like it just as well and it less homemade looking than the HEI conversion, there are how toos on the net though if your interested.
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thanks for the input, i'll prob just run durasparkII til i can afford msd, hey chrismas is a few months away i'll have to put some msd stuff on my list along with a K&N filter
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