AFR heads?
11-23-2006, 10:30 PM
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AFR heads? So I am looking to keep it legal in cali and I am putting stock exhaust back on other then cat back. But I want the best deal on a set of AFR heads I am thinking the 205 i am hoping with my cam and a nice set a heads i could run my 11's with possiable rebuild or overhaul of the motor in the next 50-75K.
-My question is what is the best price on a set of AFR heads assembled what kind of spring set up should I run currently I am running a PRC dual spring set up for my lift of .581 so all inputs would be great and keep in mind emissions legal (meaning I couldn't go outrageous with some stroker combo in CA and still pass smog so no point in 225's or I am wrong. This is something I don't want to purchase twice)
TIA!!!!!!!!!!!
-My question is what is the best price on a set of AFR heads assembled what kind of spring set up should I run currently I am running a PRC dual spring set up for my lift of .581 so all inputs would be great and keep in mind emissions legal (meaning I couldn't go outrageous with some stroker combo in CA and still pass smog so no point in 225's or I am wrong. This is something I don't want to purchase twice)
TIA!!!!!!!!!!!
Last edited by dnm12; 11-23-2006 at 10:53 PM.
11-25-2006, 03:15 PM
#5
When I looked at the AFR heads last year, all of the vendors were actually very close in price. So really, it comes down to availability and service/support after the sale. I would select who to buy them from based on this as the cost differences are going to be minor. You might catch a sale around Christmas too if you keep your eye open.
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11-25-2006, 05:41 PM
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Like someone already stated, the prices are all pretty close. Call up whoever you like to deal with and tell them what you want. Since your wanting to stay emissions legal, you won't be able to run a large duration cam, so make sure you get yours milled to 59-62cc for a bump in CR to make up some power loss from the smaller bumpstick.
11-25-2006, 06:59 PM
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Originally Posted by dnm12
So I am looking to keep it legal in cali and I am putting stock exhaust back on other then cat back. But I want the best deal on a set of AFR heads I am thinking the 205 i am hoping with my cam and a nice set a heads i could run my 11's with possiable rebuild or overhaul of the motor in the next 50-75K.
-My question is what is the best price on a set of AFR heads assembled what kind of spring set up should I run currently I am running a PRC dual spring set up for my lift of .581 so all inputs would be great and keep in mind emissions legal (meaning I couldn't go outrageous with some stroker combo in CA and still pass smog so no point in 225's or I am wrong. This is something I don't want to purchase twice)
TIA!!!!!!!!!!!
-My question is what is the best price on a set of AFR heads assembled what kind of spring set up should I run currently I am running a PRC dual spring set up for my lift of .581 so all inputs would be great and keep in mind emissions legal (meaning I couldn't go outrageous with some stroker combo in CA and still pass smog so no point in 225's or I am wrong. This is something I don't want to purchase twice)
TIA!!!!!!!!!!!
Easiet route to 11's for you is a nitrous sytem beucase it does not mess with any of the emissions system components nets a big gain in power and does not affect the smog test capacity of the vehicle. either that or a SC kit with a 50state cert. Most any camshaft out there will cuase a fial on a IM240 with the exception of the just barely warmer then stock grinds. the thunder 224 116 lsa with 585 lift with and extra cat behind the y-pipe might clean it up enough to pass. But i think thats about it. I don't think you'll gain enough with the heads of any manufacturer but the AFR 205 would be the best choice in this situation.
11-25-2006, 08:30 PM
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Jegs seems to have a pretty good priceing on their AFR heads. My jobber cost on most of the AFR heads barely beats prices from Jegs. They also seem to have a pretty good stocking situation on them.
11-26-2006, 02:42 PM
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With the stock GM MLS head gaskets and a 62 cc combution chamber at zero deck will give you 10.69:1 compression. The stock GM MLS head gaskets are .056" compressed. Mr Gasket Co has a set of MLS gaskets that are .054" compressed. I also know that Cometic has a multiple amount of different thickness. The most common is .040" compressed. The cost is where your decision comes into play. GM offers a head gasket kit that has head gaskets, int gaskets, head bolts, valve cover gaskets, and exhaust manifold/header gaskets for about $120. Where as you will spend that same amount on just head gaskets by themselves from the other companies. The advantage that the aftermaket companies have is a stronger gasket for forced induction (superchargers, turbo's, and N2O). But for your situation I think that the GM gasket set would be the best way to go and then have your heads milled for more compression.
11-26-2006, 07:24 PM
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Originally Posted by 1997bird
With the stock GM MLS head gaskets and a 62 cc combution chamber at zero deck will give you 10.69:1 compression. The stock GM MLS head gaskets are .056" compressed. Mr Gasket Co has a set of MLS gaskets that are .054" compressed. I also know that Cometic has a multiple amount of different thickness. The most common is .040" compressed. The cost is where your decision comes into play. GM offers a head gasket kit that has head gaskets, int gaskets, head bolts, valve cover gaskets, and exhaust manifold/header gaskets for about $120. Where as you will spend that same amount on just head gaskets by themselves from the other companies. The advantage that the aftermaket companies have is a stronger gasket for forced induction (superchargers, turbo's, and N2O). But for your situation I think that the GM gasket set would be the best way to go and then have your heads milled for more compression.
11-26-2006, 08:14 PM
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In my opinion, the most critical issue for passing the smog test will be the overlap of your cam (you want something pretty wide like the ZO6 cam or some of the Lingenfelter cams with 118 or so degrees of lobe separation angle). Also, you will need to have functional catalytic converters. You could have a pretty aggressive tune as long as it stays stochometric through about 55 kPa.
This is just my opinion.
Steve
This is just my opinion.
Steve
11-26-2006, 08:56 PM
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good stuff I figure that 114 lsa is pretty good and with a good tune I think it will be smoggable with the AFR 205 heads with .024" milling
