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#1 |
Registered Member
Join Date: Mar 2002
Location: sherwood Forest
Posts: 291
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![]() if i build a 347 with flat top pistons , 9.3 to one compression, afr205 heads with a comp xr286r cam and a victor jr intake with a750 holley?? I'd give it more compression but i plan on adding a procharger in a couple of months.
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84 gt350 89 lx vert 92 lincoln lsc. All Forced ( one way or another) |
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#2 | |
Registered Member
Join Date: Nov 2003
Location: Rockford
Posts: 596
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![]() Quote:
![]() With out the blower I would say it is capable of making 375-450h.p to be safe. (@flywheel) With the blower (8-10 psi w/o intercooler) over, 550h.p@ flywheel maybe more. Depends on WAY TO MUCH STUFF without sounding stupid. Hope this helps P.S To get 9.3 to one compression with the 205 heads I believe you will have to run dish pistons. |
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#3 |
Registered Member
Join Date: Mar 2002
Location: sherwood Forest
Posts: 291
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![]() How about a thick gasket to get 9.3 comp
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84 gt350 89 lx vert 92 lincoln lsc. All Forced ( one way or another) |
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#4 | |
Registered Member
Join Date: Nov 2003
Location: Rockford
Posts: 596
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![]() Quote:
Generally speaking when you run a flat top piston with good size valve relief you end up with a piston that has 1.5 2.5 negative cc. Now looking at the Afr 205 heads, they only mention having 58cc chamber heads available. You can always have the chambers worked so they are bigger but, just to keep it simple, with that size chamber and being a 347 I would look for a piston to have about a -22cc dish piston. That should yield you a compression around 9 to 1. Example: For a 347 (4.030 bore and a 3.40 stroke) Zero deck height 4.100 bore gasket size .040 compressed thickness (common average gasket thickness between .035-.045) -19cc dish piston will give you a 9.29 to 1 compression. You might have your piston in the hole xx amount or out of the hole for xx amount and will change your end result of your compression! So the example that was stated was just for an example purpose only to give you an idea so you can fine tune it yourself. There are a lot of other tricks to change compression but that example makes getting the new head gaskets easier because there are very common. And yes I got way too much time on my hands!! |
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#5 |
Registered Member
Join Date: Mar 2002
Location: sherwood Forest
Posts: 291
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![]() Thanks buddy
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