head porting guide for the lb9 )81 heads
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Joined: Jan 2008
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From: nor cal
Car: 87 Z28
Engine: 89 tpi soon tpis big mouth & tubes
Transmission: 700r4
Axle/Gears: 3:43
head porting guide for the lb9 )81 heads
I have tried several ways of asking the search tab but I haven't found the one with the pictures yet. Help please.
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Joined: Nov 2006
Posts: 30
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From: Cedar Rapids Ia
Car: 91 Z28
Engine: LB9
Transmission: 5 speed
Axle/Gears: 3.73 limited slip stock
Re: head porting guide for the lb9 )81 heads
Sorry cant help you with the picts but i see that you have an lb9 with a big mouth kit. how did that work out could you feel and increase in power and what fuel pressure/ injector size are you running.
I just purchased a big mouth kit for my lb9 5-speed.
I just purchased a big mouth kit for my lb9 5-speed.
Thread Starter
Member
Joined: Jan 2008
Posts: 129
Likes: 0
From: nor cal
Car: 87 Z28
Engine: 89 tpi soon tpis big mouth & tubes
Transmission: 700r4
Axle/Gears: 3:43
Re: head porting guide for the lb9 )81 heads
Sadly
It's not on yet, I was waiting on when I get the heads done, for the cam change. At that time, I plan on putting the drive train in to a 87 straight RS body I have, this should be in the next couple of months. Also Ive been told the stock tube runners will out flow the stock heads & the engine only has the little peanut (auto trans)cam in now. So there is no real rush. But I got good deals on near new the components.
so when all is done it's
time .watman you should have the better cam with the 5 speed car.
It's not on yet, I was waiting on when I get the heads done, for the cam change. At that time, I plan on putting the drive train in to a 87 straight RS body I have, this should be in the next couple of months. Also Ive been told the stock tube runners will out flow the stock heads & the engine only has the little peanut (auto trans)cam in now. So there is no real rush. But I got good deals on near new the components.
so when all is done it's
time .watman you should have the better cam with the 5 speed car. Last edited by tshack; Jan 5, 2009 at 09:57 PM.
Thread Starter
Member
Joined: Jan 2008
Posts: 129
Likes: 0
From: nor cal
Car: 87 Z28
Engine: 89 tpi soon tpis big mouth & tubes
Transmission: 700r4
Axle/Gears: 3:43
Re: head porting guide for the lb9 )81 heads
I finally typed in the right combination of words.
Here is the address.
https://www.thirdgen.org/forums/tech...-pictures.html well mabe others can see it easier now too.
Here is the address.https://www.thirdgen.org/forums/tech...-pictures.html well mabe others can see it easier now too.
Junior Member

Joined: Nov 2006
Posts: 30
Likes: 0
From: Cedar Rapids Ia
Car: 91 Z28
Engine: LB9
Transmission: 5 speed
Axle/Gears: 3.73 limited slip stock
Re: head porting guide for the lb9 )81 heads
Are you just haveing the stock heads ported? and how big of a cam did are you using?
Thread Starter
Member
Joined: Jan 2008
Posts: 129
Likes: 0
From: nor cal
Car: 87 Z28
Engine: 89 tpi soon tpis big mouth & tubes
Transmission: 700r4
Axle/Gears: 3:43
Re: head porting guide for the lb9 )81 heads
I'll be doing the porting. I've done 3 or 4 sets of sbc head in the past. the general pocket/ match porting job. The cam I have is a comp cams 8-300-8 262hr -12 It's not that that big. But with having to get the heads cut for bigger springs, I thought I might as well fire up the die grinder, burs & sanding cones.
Last edited by tshack; Jan 12, 2009 at 01:22 AM.
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