Ported GM LT4 Heads and Intake.

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Old Oct 21, 2005 | 06:04 PM
  #1  
TimbrSS's Avatar
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Ported GM LT4 Heads and Intake.

$1350 + shipping.

2.02" Intake 1.60" ex Manley Valves
5 angle vavle job
Comp 987 springs installed at 1.750" 138# at seat, 340# at .600"

----Intake Exhaust
.100-- 73-- 63
.200--140--117
.300--199--142
.400--242--168
.500--263--188
.600--277--197

These were flowed on a SF 110 4.030 bore, with no pipes, radius, etc.

I bought these heads off a member a while back. They were ported by Mickelson Machine in AZ, I guess the guy used to work for AZ speed and marine, before starting his own biz.

I recently tore em down, cleaned and inspected everything, and put them back together.
New valve seals, and decked the heads .010"

The intake has been opened up for 58mm TB and has a gasket match port job.

http://i22.photobucket.com/albums/b3...S/DSC02353.jpg
http://i22.photobucket.com/albums/b3...S/DSC02355.jpg
http://i22.photobucket.com/albums/b3...S/DSC02356.jpg
http://i22.photobucket.com/albums/b3...S/DSC02357.jpg
http://i22.photobucket.com/albums/b3...S/DSC02361.jpg
http://i22.photobucket.com/albums/b3...S/DSC02362.jpg
http://i22.photobucket.com/albums/b3...S/DSC02363.jpg

http://i22.photobucket.com/albums/b3...S/DSC02367.jpg
http://i22.photobucket.com/albums/b3...S/DSC02366.jpg
http://i22.photobucket.com/albums/b3...S/DSC02364.jpg
http://i22.photobucket.com/albums/b3...S/DSC02368.jpg

Last edited by TimbrSS; Nov 21, 2005 at 10:29 PM.
Old Oct 25, 2005 | 12:32 AM
  #2  
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Re: Ported GM LT4 Heads and Intake.

Bump. gotta get money for school.
Old Oct 25, 2005 | 04:18 PM
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Re: Ported GM LT4 Heads and Intake.

Any idea what size port they are now (after porting)?
Any numbers on these heads?
How many miles on them?
Old Oct 25, 2005 | 10:16 PM
  #4  
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Re: Ported GM LT4 Heads and Intake.

I don't know what size they are... Probably close to whatever the average stage 2 gm heads come out to be. I could take them in and CC if someone really needed to know and was serious about buying.

I posted the flow numbers, what other numbers do you need?

I'm not sure how many miles are on them... Prolly less than 10k. No miles on them since i tore them down, inspected, cleaned and reassembled.
Old Oct 27, 2005 | 04:57 AM
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Re: Ported GM LT4 Heads and Intake.

Was curious if you had any dyno/track/performance #'s on these heads

Wondering what kind of real world power they made

Type of seals? What kind of manley valves?
Old Oct 27, 2005 | 09:00 PM
  #6  
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Re: Ported GM LT4 Heads and Intake.

I never used these, but the guy i bought them off had them on a 383 with a cc306, went high 11's at 119. Low 400's for rwhp. Teflon seals. I'm not sure which manley valves they are.
Old Oct 30, 2005 | 11:03 PM
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Re: Ported GM LT4 Heads and Intake.

TTT. Someone make an offer.
Old Nov 6, 2005 | 10:58 PM
  #8  
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Re: Ported GM LT4 Heads and Intake.

ttt
Old Nov 7, 2005 | 07:07 AM
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Re: Ported GM LT4 Heads and Intake.

how much for just the intake?
Old Nov 7, 2005 | 10:25 PM
  #10  
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Re: Ported GM LT4 Heads and Intake.

I'll only sell the intake after the heads are sold.
Old Nov 7, 2005 | 10:48 PM
  #11  
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Re: Ported GM LT4 Heads and Intake.

Interested in trades? Have a badass th350 setup I'm trying to unload with c02 shifter, tq arm mount and new tailshaft with speedo sensor. about $2800 in parts. I'll trade you straight across
Old Nov 8, 2005 | 11:07 PM
  #12  
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Re: Ported GM LT4 Heads and Intake.

I'm not looking for any trades at the moment.
Old Nov 9, 2005 | 08:33 AM
  #13  
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Re: Ported GM LT4 Heads and Intake.

It appears as the intake side has been ported, but the exhaust side hasn't been touched. That doesn't make any sense. What good is good flowing intake, but poor flowing exhuast? Just an observation. Also, the intake porting is crooked, the intake and throttle body bores. Did you do it yourself?? Just curious.
Thanks
Cody
Old Nov 9, 2005 | 10:50 PM
  #14  
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Re: Ported GM LT4 Heads and Intake.

The exhaust is ported, it just isn't shiney cause it was bead blasted. I touched up the intake side with a sandpaper cartrdige afterwords.

The intake came that way from the person i bought it off of. It wouldn't take long to touch it up, but I've had more important things to do.
Old Nov 21, 2005 | 10:28 PM
  #15  
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Re: Ported GM LT4 Heads and Intake.

TTT. Lots of interest, no one with money. Lets go people. I need to pay for school.



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