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

Simple 18 degree head question

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Old Jun 4, 2006 | 02:38 PM
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Default Simple 18 degree head question

Some fully ported 21x name brand heads converted for LT1 with whatever great flowing FI intake and a 383 12.x c/r hyd roller what type of power would it make? This would also have all the average bolt ons etc.
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Old Jun 4, 2006 | 02:47 PM
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I dont think that is simple
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Old Jun 4, 2006 | 03:05 PM
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anywhere from 300hp to 700hp.
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Old Jun 4, 2006 | 08:19 PM
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Well if you use the 18X heads you might as well use 21 degree heads as they pinch the port to much

I am going to say 305-700
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Old Jun 5, 2006 | 12:27 PM
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The offset rockers are going to make the use of the hyd lifters hard to do. Your going to want to go to a offset solid roller lifter.

bret
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Old Jun 5, 2006 | 01:01 PM
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When would one benifit from a single plane intake? I want to get one but I'm unsure if it would be worth it if I dont plan on reving past 7000
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Old Jun 5, 2006 | 04:45 PM
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Originally Posted by Honda Hunter
When would one benifit from a single plane intake? I want to get one but I'm unsure if it would be worth it if I dont plan on reving past 7000
if its a street car not revving past 7k, i wouldnt bother.
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Old Jun 5, 2006 | 04:48 PM
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That's what I thought. I was thinking of going solid roller with a single plane while using the stock computer and my Dynaspark but the more I think of it the more it would seem as though I would lose alot of power down low and never be able to take advantage of the power up top.
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Old Jun 5, 2006 | 06:32 PM
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Originally Posted by Honda Hunter
When would one benifit from a single plane intake? I want to get one but I'm unsure if it would be worth it if I dont plan on reving past 7000
Part of your issue is the tuning over in Bahrain to try and pull this off.

Bret
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Old Jun 5, 2006 | 06:36 PM
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Originally Posted by SStrokerAce
Part of your issue is the tuning over in Bahrain to try and pull this off.

Bret
Good point. Would I have to go with a aftermarket PCm/piggy back? If that's the case I'm going to drop the idea right now.
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Old Jun 5, 2006 | 06:52 PM
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Originally Posted by Honda Hunter
Good point. Would I have to go with a aftermarket PCm/piggy back? If that's the case I'm going to drop the idea right now.
only if you want to turn it past 7100.....
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Old Jun 6, 2006 | 10:01 AM
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In your neck of the woods I wouldn't do it.

Bret
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Old Jun 6, 2006 | 11:35 AM
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Ok. Thaks for saving me a ton of money
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Old Jun 6, 2006 | 12:29 PM
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what exactly are you trying to do? what kind of power do you want to make? are you looking for somthign that will look cool when you pop the hood?
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Old Jun 6, 2006 | 12:50 PM
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I want mid to high 400's N/A. I dont care what looks cool under the hood as long as it makes it go fast.
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Old Jun 6, 2006 | 01:40 PM
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a 396 with a solid roller and a single plane should get you to that goal if setup right. i would use some nice afr's or sbc converted heads. i havnt looked much at the other newer heads for the lt1 so im not commenting on them as i dont have enought info to say either way.

you couuld get in that range with an ltx intake and hyd cam also

brook
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Old Jun 6, 2006 | 05:18 PM
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Originally Posted by Honda Hunter
I want mid to high 400's N/A. I dont care what looks cool under the hood as long as it makes it go fast.

i think you should be over thats with you r current setup, i believe i have read about stock CI motors with good heads and cc306, GM847 go close to 400 hp and beyond.
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Old Jun 6, 2006 | 10:52 PM
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No way. stock ci motors with H/C Ive seen may hit the mid 300's but Ive never seen any in the 4's. Everyone tells me with this current setup I should allready be in the mid 400 range. I guees we will see if I can ever get it to the dyno.
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Old Jun 6, 2006 | 11:21 PM
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you can hit 400 with heads and cam
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Old Jun 6, 2006 | 11:32 PM
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They don't hit 400rwhp? Both LE and Ai do that.
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