LT1-LT4 Modifications 1993-97 Gen II Small Block V8

afr heads

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Old Feb 7, 2008 | 07:55 PM
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im buying some 210cc compention series heads.but i dont no what cc to buy they are going on a 383.does 58cc sound ok
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Old Feb 7, 2008 | 08:16 PM
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You are wasting money dealing with AFR but if you are going to make that mistake at least minimize it by getting them as cast and letting someone else port them. Even AFR believers will tell you their porting sucks.
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Old Feb 7, 2008 | 08:37 PM
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i dont no what cc to buy they are going on a 383.does 58cc sound ok
It will depend on what dome/dish size your pistons are and what comp ratio you want.
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Old Feb 7, 2008 | 08:40 PM
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Originally Posted by 96capricemgr
You are wasting money dealing with AFR but if you are going to make that mistake at least minimize it by getting them as cast and letting someone else port them. Even AFR believers will tell you their porting sucks.
Do they? What makes you think that? I am looking into buying some too...Maybe you can give us your insight where poeple and as you stated "AFR believers" tell us that the porting sucks. I just want to buy something that works.
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Old Feb 7, 2008 | 08:55 PM
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Afr heads flow terrible out of the box, if you spend a bunch of money on them at a good reputible porter then you'll have an awesome set of heads. Cheaper to go with trick flows and have them ported.
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Old Feb 7, 2008 | 09:00 PM
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Go with the le3 or a.i's heads
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Old Feb 7, 2008 | 09:00 PM
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A friend is looking to sell his AFRs so he can put AI ported stockers on his car.

Most of the AFR love comes from believing in marketting and a reputation built before the LT1. They did not keep pace with the LT1 and recently redid their entire lineup to try and compete, basically an admission it was all grossly outdated. My understanding is that till recently it was all like 60-70s era ports they bought from Brownfeild. New stuff the "eliminator " line is untested.
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Old Feb 7, 2008 | 09:03 PM
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Get some bare trickflows and send them to Advanced Induction
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Old Feb 7, 2008 | 09:13 PM
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Has anyone here actually flowed a set of their "out of the box" 210cc comp eliminator heads? Or are you just repeating "hear say"? Just curious if anybody here has any data that proves their heads are garbage out of the box. Seriously, I am pretty sold on their heads...but I'm always looking for better results.
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Old Feb 7, 2008 | 09:14 PM
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Originally Posted by 94'BLKBRD
Get some bare trickflows and send them to Advanced Induction
Why would you do that when they can provide the castings? You like to pay extra shipping?

For an NA motor I would say AI is the right choice but send them GM castings.
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Old Feb 7, 2008 | 09:27 PM
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I'd like to see what AI will be able to do with the Dart heads in a couple years. They supposedly flow in the 260s out of the box as cast which isn't bad. I was considering buying a set but it looks like I will be able to get my LPE heads fixed and have new Ferrea valves and springs and all for well under $700. Just the Dart LT1 castings would of run $420 a piece bare, and there wasn't much point in buying them when I don't have the money to send them out for porting and the LPEs will flow better than the as cast Darts.
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Old Feb 7, 2008 | 09:34 PM
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Originally Posted by travie319
Has anyone here actually flowed a set of their "out of the box" 210cc comp eliminator heads? Or are you just repeating "hear say"? Just curious if anybody here has any data that proves their heads are garbage out of the box. Seriously, I am pretty sold on their heads...but I'm always looking for better results.
Here is a post from someone who flow tested 195cc SBC AFR Eliminator heads. Note that these are the SBC version, but I believe they use the same basic design as the LTX version, as the flow numbers AFR publishes are identical between the two. The flow numbers look very close to what AFR publishes on their website. I have been unable to find independent dyno or track results for the Eliminators though.

http://www.cz28.com/forums/showthrea...afr+eliminator
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Old Feb 7, 2008 | 09:41 PM
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so i just spent 2600 dollars for nothin

Last edited by darrell hoagland; Feb 7, 2008 at 10:12 PM.
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Old Feb 7, 2008 | 10:02 PM
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^^^huh?
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Old Feb 7, 2008 | 10:03 PM
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Originally Posted by 96capricemgr
You are wasting money dealing with AFR but if you are going to make that mistake at least minimize it by getting them as cast and letting someone else port them. Even AFR believers will tell you their porting sucks.
The AFR's have changed their whole SBC line-up . I have never had a set of AFR's . I remember back 7 or 8 years ago a freind of mine got a set for his small block ford and I thought the CNC work looked like **** . They looked like an unfinished head . I looked at a set of AFR 205 ls1 heads this weekend and was very impressed . The port work looks great. Now if that is what we have to look foward to on the new Lt1 heads then I will definatly get a set. But I will wait and see some results first.
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Old Feb 7, 2008 | 10:04 PM
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Im going with AI when I build my 355
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Old Feb 7, 2008 | 11:25 PM
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Originally Posted by 96capricemgr
A friend is looking to sell his AFRs so he can put AI ported stockers on his car.

Most of the AFR love comes from believing in marketting and a reputation built before the LT1. They did not keep pace with the LT1 and recently redid their entire lineup to try and compete, basically an admission it was all grossly outdated. My understanding is that till recently it was all like 60-70s era ports they bought from Brownfeild. New stuff the "eliminator " line is untested.
I wish someone had a bunch of loose cash laying around to put the 3 most popular head choices up against each other. I'd love to find out if these A.I.'s are really as good as you make them sound. Everytime someone has plans that dont involve A.I., you jump in and blast the company they are interested in. But all these people that come to YOU with their problems with other manufacurers heads seem to find GOD when they slap on some A.I.'s. I'm not calling you out, but I hope i win the powerball.

P.S. The reason AFR created the elininator heads was cause their older ones were designed very soon after the release of LT-1 cars way back in late '92. The new eliminators are using LS-1 style valves, springs, and retainers. This is what super chevy has to say about them.

A clean sheet of paper approach to port and combustion chamber designs has boosted efficiency levels dramatically with smaller cross-sectional areas flowing 5-10 percent more across the entire curve for increased airspeed. AFR is the first company to incorporate "Gen III" technology into their 23 product line by fitting them with 8mm valves, and lightweight springs and retainers (a 50-gram weight reduction per valve/spring/retainer assembly), which reduces valve float and improves high-rpm power and reliability.

Sounds like that whole weight reduction thing is a good idea for anyone who wants to spin their motor to 6800 to 7000 r's. Just my .02 -Chris




Oh, heres a link to the article I pulled that clip from: http://www.superchevy.com/technical/..._products.html

Last edited by BLK,97,T/A,M-6; Feb 7, 2008 at 11:31 PM.
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Old Feb 8, 2008 | 12:36 AM
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Originally Posted by darrell hoagland
so i just spent 2600 dollars for nothin
The 210s are good heads. You will be fine with them. The smaller ones like the 195s are not as good generally compared to ported stockers or trickflow. People have made good power with the larger ones though. Do some searches on the camaroz28.com site.
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Old Feb 8, 2008 | 12:46 PM
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Originally Posted by darrell hoagland
so i just spent 2600 dollars for nothin
No. They're still a lot better than a stock casting. Also, provided AFRs still come w/ the extra thick deck they are a great forced induction head.
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Old Feb 8, 2008 | 01:04 PM
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have 210s on my 396, don't have my flowsheet but i love em
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