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Author
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Topic: need advice
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stroker man
Gearhead Posts: 143
From: Denville NJ USA
Registered: Mar 2002
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posted 04-19-2003 01:49 PM
   
getting ready to build up my 408w, new heads roush 200 cast iron flows numbers 0.400 .in 216.3 .ex 166.7, 0.500 .in 245.5 .ex 179.2, 0.600 .in 262.7 .ex 185.4, 0.700 .in 266 .ex 190, the engine builder says there not flowing enough at mid lift for a 408 is that right? street car little race, i thought it was ok flow numbers, also said you would be better off with alum heads so it can use pump gas, my comp ratio is near 10.7.1 or so 67.5 chambers, i was hoping to use pump gas on this new combo, what do you think i should do use the roush heads or sell and start over with alum heads maybe vic jr, i know i had a post on hear about alum vs cast iron for street car, what ex ports are near the world casting? tight engine compartment with my headers 69 mach1 hooker supercomps, thanks.
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steve'66
Gearhead Posts: 7226
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 04-19-2003 09:46 PM
I've been advising VicJr's from the start.
10.7 is a little steep for iron heads on pump gas. You'll have to back the timing off to 30-34 or so total, or over cam the thing to get by on today's pump gas.SteveW
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steve'66
Gearhead Posts: 7226
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 04-19-2003 10:24 PM
You could use some extra thick head gaskets to lower the compression .5 or so.  SteveW
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stroker man
Gearhead Posts: 143
From: Denville NJ USA
Registered: Mar 2002
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posted 04-20-2003 07:34 AM
steve thanks, talking to differant engine guys and everybody has differant opinions, the engine builder that im using now builds race engines as the one i got the parts from is a speed shop owner, he said he didnt like alum heads on small block fords because of only 10 head bolts, so i just took his advise, now im thinking that i would like to go with alum because i dont want to use race gas every time i fill the thing up 6 bucks a gallon for 110 here 3.99 for 100 actane, so maybe ifs its not to late ill sell the roush heads and get some vic jr or something else, or ill just lower the comp ratio a little and live with it for now,have to talk the the engine builder see what he says, cam is hy roller 236 242 555 576 108, vic jr manifold, so its better then the last combo i had 218 228 536 536 112 stealth, hoping for 450 to 475 hp and good torque which i need for street car, thanks keep you posted.
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