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

View Poll Results: Who makes the best LTX heads
Advanced Induction 28 29.17%
AFR 37 38.54%
Stock Ported 19 19.79%
Other 12 12.50%
Voters: 96. You may not vote on this poll

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Old 04-13-2008, 06:38 PM   #1
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Default Who makes the best head for LTX

I was just wondering what you guys think.I like my AFR`s but I feel I could do better

btw I ment 23 degree
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http://videos.streetfire.net/video/S...-DJ_133669.htm

Last edited by Dave J; 04-13-2008 at 06:45 PM..
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Old 04-13-2008, 06:50 PM   #2
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im really liking the new DART heads IMO. A few people i head said they can really be a sick head when theres more time on the port machine with um.
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Old 04-13-2008, 06:55 PM   #3
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One more question I have is can 415 rwhp be made on a emissions legal hydrolic roller heads and cam LTX motor with LT`s and all the boltons and M6 tranny?
Maybe AI setup?
AFR eliminator?
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10.62@127(1.43 60ft) 6.68@102 1/8th (all motor)
3325lb race weight
http://videos.streetfire.net/video/S...-DJ_133669.htm
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Old 04-13-2008, 08:05 PM   #4
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Are you talking like out of the box or fully ported head?
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Old 04-13-2008, 08:14 PM   #5
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from what i have researched the stockers are great when they are worked by someone like lloyd elliot
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Old 04-13-2008, 09:17 PM   #6
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Quote:
Originally Posted by Dave J View Post
One more question I have is can 415 rwhp be made on a emissions legal hydrolic roller heads and cam LTX motor with LT`s and all the boltons and M6 tranny?
Maybe AI setup?
AFR eliminator?
I did 411 with a 12 bolt rear so with a 10 bolt 415 should be doable. That was with LE2 heads.
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Old 04-13-2008, 09:43 PM   #7
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AI all the way!
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Old 04-13-2008, 10:49 PM   #8
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Quote:
Originally Posted by mpe331lx View Post
AI all the way!

may be true but give them what set of heads now??

AI with a set of dart heads dumdumdum!!
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Old 04-13-2008, 11:05 PM   #9
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Advanced Induction gets my vote BUT then you have to decide on ported stockers or Trickflows from them.

I know everyone is getting a hardon for the Darts but I just don't see what it is based on?????
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Old 04-13-2008, 11:24 PM   #10
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I dont know eaither, i just like um cause there new and i like to be different, lol. But i did hear on a few threads that they have a LOT of potential. Take it as you will.
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Old 04-14-2008, 05:56 AM   #11
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Local shop can get the stock LT4 head to over 300CFM.
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Old 04-14-2008, 09:28 AM   #12
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Quote:
Originally Posted by Mekanic View Post
Local shop can get the stock LT4 head to over 300CFM.
but what does it RUN?

I think the poll is showing just how useless the forums can be. The OP has AFRs and is questioning that decision yet AFRs which are a tiny minority of what is used are doing well in the poll. Betting you have a bunch of kids with stock cars voting based on what they read in magzines.
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Old 04-14-2008, 10:58 AM   #13
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I am shocked that so many people think ported stockers are better than hand ported AFR`s or trick flow`s or what ever
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10.62@127(1.43 60ft) 6.68@102 1/8th (all motor)
3325lb race weight
http://videos.streetfire.net/video/S...-DJ_133669.htm
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Old 04-14-2008, 11:13 AM   #14
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I think what we see is guys throwing GOBS of money at aftermarket castings and porting and not really running any better than someone with ported stock castings.

Have to remeber the LT1 heads is a BIG step up from all the production gen 1 stuff that came before it and that all the aftermarket "lt1" heads are just a converted gen 1 design many of which like the pre-eliminator AFRs are decades old designs. So while they may have been great upgrades on gen 1 motors the LT1 heads is already so much better than that the gen 1 OEM stuff that what is an upgrade for them may not translate into an upgrade for us.

If I needed an aftermarket casting the AI Trickflows are the only one I would consider at this time, the stock castings work just fine though.
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http://http://i120.photobucket.com/a...eMGR/11567.jpg
http://s120.photobucket.com/albums/o...620at11584.flv
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Old 04-14-2008, 11:18 AM   #15
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Well for one the poll is misleading and falsifying info.

AI DOES NOT MAKE heads, they PORT them. Theres a HUGE difference in porting them and casting them in production.

I agree with 96caprice, the ported stockers are the way to go instead of dropping 1-2k for the heads and then another 1500-2k for the porting, just doesnt makes any sense. I was going to go that way but the pricing was ridiculous after all was said and done so I decided to go with the stockers ported.
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Old 04-14-2008, 11:32 AM   #16
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Quote:
One more question I have is can 415 rwhp be made on a emissions legal hydrolic roller heads and cam LTX motor with LT`s and all the boltons and M6 tranny?
Maybe AI setup?
AFR eliminator
I don't know about emissions legal but my little 355 with LT1 castings that were ported made 422RWHP with a stick, LT's, and a 236/242 hyd roller... Depends on where your emissions test is... IE what state....
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Old 04-14-2008, 11:32 AM   #17
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I Have Tried All Of These Heads On My Diffrent Motors It Depends On How Fast You Want To Go. The Best Head For The Lt1/lt4 Motor Is The Afr 220,227 & 215rr Hands Down.
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Old 04-14-2008, 11:53 AM   #18
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Really depends on the motor. Typically unless an all out race setup use a ported stocker on 355 and ported aftermarket on 383+. For aftermarket I would use TFS or AFR head. They are proven and finish well. I'm pretty excited about the RHS heads though, I've got a set on my BBC. On paper they look good, but I haven't run the motor yet.
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Old 04-14-2008, 12:17 PM   #19
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What the motor is is a good point. Most impressive "LT1" I have ever seen is a donovan aluminum block modified to accept all things LT1, reverse flow cooling, opti, mechaincal WP all of it and run on LT1 injection. Runs deep in the 9s at 4500lbs and uses lightly worked AFR 227s BUT this is a blower 434ci setup with a small shot of nitrous to cool it and when he started building another motor for a friend planned as a mild blower build they went with Advanced Induction 185cc ported GM castings because the guy understands what is working well on a 7200rpm 434ci motor may not be right for a 6500rpm 383 even with a blower and certainly is not right for a NA motor.
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http://http://i120.photobucket.com/a...eMGR/11567.jpg
http://s120.photobucket.com/albums/o...620at11584.flv
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Old 04-14-2008, 12:36 PM   #20
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Quote:
Originally Posted by BIG PURPLE View Post
I Have Tried All Of These Heads On My Diffrent Motors It Depends On How Fast You Want To Go. The Best Head For The Lt1/lt4 Motor Is The Afr 220,227 & 215rr Hands Down.
Is that you, O?

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