Guest V8Z Posted September 27, 2006 Share Posted September 27, 2006 I'm putting GMPP fastburn heads on my 350 and I was looking for a intake manfold and came across this describtion in the jegs book. It says that fastburn heads can use "vortec sytle manifolds or raised port manfolds" So my question is do I have to by a manfold or will my Edelbrock EPS manifold work? I would just check it out myself but my heads are still at the machine shop.BTW my motor is a 1987 down motor. Thanks for any info. Quote Link to comment Share on other sites More sharing options...
grumpyvette Posted September 27, 2006 Share Posted September 27, 2006 vortec heads have aproximately 170cc ports http://www.sallee-chevrolet.com/frame.html?/Cylinder_Heads/Vortec.html those fastburns are closer to 200cc http://www.sallee-chevrolet.com/frame.html?/Fast_Burn_Cylinder_Heads.html heres intakes that fit, your rear gear,cpr,cam timing and several other factors will dictate the correct sellection in the intake http://www.sallee-chevrolet.com/frame.html?/Edelbrock/Vortec_Head_Intakes.html Quote Link to comment Share on other sites More sharing options...
icewtr Posted September 27, 2006 Share Posted September 27, 2006 I have these fast burn heads.... i have tried an Edelbrock performer dual plane .. it was fine .. now using a victor jr single plane .. picked up top end power but lost about 15 on the bottom .. below 2500rpm .. i just ordered the intake GM suggest for use with the heads ...it is Eliminator GM part number 12497698.. the main thing with these fast burn heads is the gasket ... only the gm gaskets fit the correct way .. tried felpro and they leak on the top of the ports.the gasket that fit perfect was gm 12497760.. the ports on the fast burn heads are about an 1/8 inch taller than on a victor jr intake that has no porting done to it at all.. as soon as i get the new intake on and dyno i will post the resultts compared to the other 2 intakes i have tried.... Quote Link to comment Share on other sites More sharing options...
Guest V8Z Posted September 27, 2006 Share Posted September 27, 2006 But the intake has to be a vortec style intake? None of the 1987 down aftermarket intakes will work? Quote Link to comment Share on other sites More sharing options...
280zwitha383 Posted September 27, 2006 Share Posted September 27, 2006 yes and no Quote Link to comment Share on other sites More sharing options...
Guest V8Z Posted September 29, 2006 Share Posted September 29, 2006 BTW, I got my fast burns back today from the machine shop and he showed me that these heads are drilled and tapped for vortec and old style 350 intakes. The bolt holes do line up for the old stlye manifold but the intake inlet on the fast burn head is 3/8" taller than the manifold, same for the gasket. Quote Link to comment Share on other sites More sharing options...
dr_hunt Posted September 30, 2006 Share Posted September 30, 2006 BTW, I got my fast burns back today from the machine shop and he showed me that these heads are drilled and tapped for vortec and old style 350 intakes. The bolt holes do line up for the old stlye manifold but the intake inlet on the fast burn head is 3/8" taller than the manifold, same for the gasket. Those are a raised port head compared to standard sbc. Quote Link to comment Share on other sites More sharing options...
280zwitha383 Posted September 30, 2006 Share Posted September 30, 2006 BTW, I got my fast burns back today from the machine shop and he showed me that these heads are drilled and tapped for vortec and old style 350 intakes. The bolt holes do line up for the old stlye manifold but the intake inlet on the fast burn head is 3/8" taller than the manifold, same for the gasket. I'm sorry, I completely forgot that they did that. Do they not also do that on their newer Vortec heads? Quote Link to comment Share on other sites More sharing options...
Guest V8Z Posted October 1, 2006 Share Posted October 1, 2006 The newer fast burns, and the edelbrock e-tech. Quote Link to comment Share on other sites More sharing options...
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