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

twisted wedge heads

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Old 11-23-2010, 08:30 PM
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Default twisted wedge heads

so i have a chance to buy a set of these rare heads, im working on an mildly agressive but streetable build, would they be good for that?

and also, does anyone know what parts are specific to these heads, i.e. valves, springs or what?
Old 11-23-2010, 08:49 PM
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Last pair of these I knew of running on a car were rough on the valvetrain and the car later went faster with PROPERLY ported stock castings. If you want them for a conversation piece sure, for performance I would pass, they aren't bad but not that great either.
Old 11-23-2010, 08:53 PM
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well they are 700 bucks, but i guess for a couple hundred more i could get a used set of le2's or a get him to port mine
Old 11-23-2010, 09:59 PM
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Or send them to AI and get them ported the right way.
Old 11-23-2010, 10:58 PM
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These are a great head to be had. The great thing about these heads are the mid lift numbers. Thats were these heads shine.
Old 11-23-2010, 11:24 PM
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well im still really looking into them, but the only thing holding me back is my lack of knowledge on them, are the rockers the same as they are for regular lt1 heads, what about the springs, or pushrods, or valves?
Old 11-23-2010, 11:34 PM
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Any SBC rocker will work with LT1 heads...it's the valve covers that are the problem when it comes to fitment (center bolt versus perimeter).

Valves/pushrods should be standard SBC.
Old 11-23-2010, 11:44 PM
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I don't have any experience with the twisted wedge heads on LT1, but I had 2 friends who ran them on old SBC's. One claims a 3+ MPG improvement and alot more power, but he doesn't race. The other said he saw some gas milege increase as well and he went from consistent 8.80's to consistent 8.30's with no other changes with his daily driver. That was compared to some very good heads to start with...not vs. some stock smog head stocker junk. 1/8th mile track of course.

I do remember they both had to use custom length pushrods, and that you can only run xxx amount of lift before custom valve notches were required due to the different valve angles/placements with the "twisted wedge" chamber. If I remember correctly it wasn't much over .525" lift and 23X something @ .050" that was recomended. That was with a flat tappet hydraulic. I'm pretty sure all this would still apply to the LT1 since the differences should be water passage related only.
Old 11-23-2010, 11:58 PM
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If you look the SBC twisted wedge heads required a different type of rocker arm. I had the link saved on my old hard drive, which does no good now.
Old 11-24-2010, 02:43 PM
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so should i go for it, i mean, i dont want a world beater, just decent h/c/i lt1 possibly 355
Old 11-24-2010, 03:04 PM
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If you're looking for a decent H/C/I lt1, go with a set of LE heads and be done with it. Or AI. Go with what's easier and more common, thus easier to repair/replace if something goes wrong.
Old 11-24-2010, 03:34 PM
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just the thing that keeps me looking at them is, dont we do stuff to our cars to make them different from everyone elses? so the cool factor of these is very high, especially if they are a good set of heads, which i have been hearing good things about them.
Old 11-24-2010, 04:49 PM
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Go with narrow body rockers, Im using those and I didnt need to trim my valve covers.
Old 11-24-2010, 04:51 PM
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The only way I'd pick them up was if I was going to have someone port them.
Old 11-24-2010, 05:29 PM
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and since they keep getting brought up, about how much does ai usually charge to port a set of heads?
Old 11-24-2010, 05:31 PM
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Depends on what you want done really. I would just call them up and ask.
Old 11-24-2010, 05:45 PM
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i mean, i would rather not spend 2 grand on heads, im just another college kid on a budget after all
Old 11-24-2010, 06:51 PM
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Originally Posted by RamAir95TA
Or send them to AI and get them ported the right way.
I have had really good results with LE heads and cam. I have seen some really good results from AI heads as well, but I don't think this comment was necessary.

You can't go wrong with either.
Old 11-24-2010, 07:04 PM
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Originally Posted by *CAMARO*
I have had really good results with LE heads and cam. I have seen some really good results from AI heads as well, but I don't think this comment was necessary.

You can't go wrong with either.
And what kind of results do you have? Hm?

No one gives a **** if you think my comment was necessary or not.
Old 11-24-2010, 07:23 PM
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Originally Posted by RamAir95TA
And what kind of results do you have? Hm?

No one gives a **** if you think my comment was necessary or not.
My setup last season was a set of LE1 heads and cam on top of a forged 355 with a 150 shot and it ran a best of 6.8X with a 1.6 60' in the 1/8 with 3.73gears. I don't have a 1/4 mile track close by. Not so bad for his least expensive heads imo. This winter my setup will be changing to LE2 h/c with more spray.

Lloyd Elliott is really good at what he does and the price is better. I don't see why you have a reason for bashing him. Like he ports heads the wrong way just because they are hand ported!


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