Ported intake - ZR-1 Net Registry Forums

LGAFF · 05-31-2011

Ported IH, these are stage I and are 36MM at the surface....they progressively move down to 33mm at the bottom of the IH on the primary and on the secondary they are 36MM. The injector bosses have been removed.

Both IHS are done I will do the plenum this week...paint the plenum and IHs

Cost is $450

I can open to 36mm straight through for $700

**All prices are with you giving me your IHs and Plenum in exchange..
**Shipping is extra

If you need them installed and are in driving distance to Chicago, I can put it on for a reasonable price.....gaskets at your cost.

LGAFF · 05-31-2011

Unported stock: These can neck down to as small as 31mm at the head face

Stage I port same runner: I make sure its a true 33mm at IH to head face on primary

LGAFF · 05-31-2011

Stock IH at head mating surface, as noted they can be as small as 31mm and note the large bosses which impede air flow:

These are stage I, I will clean these up even more, I had originally ported this for my car:

LGAFF · 05-31-2011

Coolant block offs installed also

rhipsher · 05-31-2011

That ball gage looks like a moon rock. Lol!

LGAFF · 05-31-2011

That is a 35mm foose ball that has been to hell and back...covered in aluminum and WD40

mike100 · 05-31-2011

^^ I also purchased a foosball when I did mine...it just seems to come up on a google search if you look up '35mm ball'

LGAFF · 06-27-2011

Well while I wait for my block work....opened these up more, and started on the plenum......checking interest...they are now 35+ down to the bosses....as big maybe bigger than the ones on my 391rwhp car.

Paul in VA · 06-28-2011

Hi:
If I might, I would like to ask some questions... What size are the ports in the head (that the IH bolts to)? Does one also want to match the IH to the Pleneum in order to maintain a constant size? What coolant block offs are installed (0r rather why)? What is the anticipated gain from this porting?

Kevin · 06-28-2011

I really need to get my car ported...just can't afford it now.

the coolant bypass is for the TB, gm put them there to run coolant into the TB to keep the plates from icing up in cold weather...but who drives a zr-1 in cold weather? the advantages are to keep the air cooler into the motor providing (possibly) more power and the ability to pull the plenum without having to dump coolant

05-31-2011	#1
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,180	Ported intake Ported IH, these are stage I and are 36MM at the surface....they progressively move down to 33mm at the bottom of the IH on the primary and on the secondary they are 36MM. The injector bosses have been removed. Both IHS are done I will do the plenum this week...paint the plenum and IHs Cost is $450 I can open to 36mm straight through for $700 All prices are with you giving me your IHs and Plenum in exchange.. Shipping is extra If you need them installed and are in driving distance to Chicago, I can put it on for a reasonable price.....gaskets at your cost. __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

05-31-2011	#2
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,180	Re: Ported intake Unported stock: These can neck down to as small as 31mm at the head face Stage I port same runner: I make sure its a true 33mm at IH to head face on primary __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

05-31-2011	#3
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,180	Re: Ported intake Stock IH at head mating surface, as noted they can be as small as 31mm and note the large bosses which impede air flow: These are stage I, I will clean these up even more, I had originally ported this for my car: __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

05-31-2011	#4
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,180	Re: Ported intake Coolant block offs installed also __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

05-31-2011	#5
rhipsher Join Date: Aug 2008 Location: Houston, TX Posts: 2,314	Re: Ported intake That ball gage looks like a moon rock. Lol!

05-31-2011	#6
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,180	Re: Ported intake That is a 35mm foose ball that has been to hell and back...covered in aluminum and WD40 __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 Last edited by LGAFF; 05-31-2011 at 10:54 PM.

05-31-2011	#7
mike100 Join Date: Feb 2011 Location: San Marcos CA Posts: 1,786	Re: Ported intake ^^ I also purchased a foosball when I did mine...it just seems to come up on a google search if you look up '35mm ball'

06-27-2011	#8
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,180	Re: Ported intake Well while I wait for my block work....opened these up more, and started on the plenum......checking interest...they are now 35+ down to the bosses....as big maybe bigger than the ones on my 391rwhp car. __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

06-28-2011	#9
Paul in VA Join Date: Sep 2010 Location: Sterling, VA Posts: 146	Re: Ported intake Hi: If I might, I would like to ask some questions... What size are the ports in the head (that the IH bolts to)? Does one also want to match the IH to the Pleneum in order to maintain a constant size? What coolant block offs are installed (0r rather why)? What is the anticipated gain from this porting?

06-28-2011	#10
Kevin Join Date: Jun 2005 Location: pittsburgh Posts: 4,624	Re: Ported intake I really need to get my car ported...just can't afford it now. the coolant bypass is for the TB, gm put them there to run coolant into the TB to keep the plates from icing up in cold weather...but who drives a zr-1 in cold weather? the advantages are to keep the air cooler into the motor providing (possibly) more power and the ability to pull the plenum without having to dump coolant __________________ It's not the car, it's the people - Doug Johnson 90 r/r "KEYS ON" nick named "T.L.B"