ported plenum and injector housings.. - Page 3 - ZR-1 Net Registry Forums

Locobob · 04-24-2015

There is enough extra fuel in the factory proms WOT program to support some breathing mods. You can generally get away with headers or porting but not both without adding fuel.

Pete · 04-24-2015

We need to clarify,there is some differences in porting.
The price does not tell the whole story.

There is two different ways to porting 35mm and 36mm

On the 35mm i use a 35mm gauge ball that will drop straight thru primary port (1990-1992 IH's).
On the 36mm porting i use a 36mm gauge ball that will drop straight thru (1990-1992 IH's)
35mm $650 this is very easy and less time consuming no fears
36mm more time consuming have to be very careful getting close to water and oil jackets most don't do 36mm $1000
$150 reprogram prom.

On my IH's i made the 36.5mm gauge ball drop thru this is very scary my IH's are like l98 intake runners

Pete

LGAFF · 04-25-2015

Just to clarify, Anyone who has had their intake ported by me knows the ports are larger than 35MM,typically the smallest part of my primary runners are 35.3-35.5MM+ around water jacket areas.

I leave some safety margins as with powdercoating you have to sandblast....going too thin and you start blowing through the runner walls.

I enjoy doing porting which is why I offer it at a reasonable price. Both Pete and Locobob do a great/awesome job with their porting. I started doing this as a low cost alternative for those that could not afford more expensive porting.

Vette73 · 04-25-2015

Yes.....Better to be safe than sorry....Will be in touch soon ..

John...

Jim Nolan · 04-25-2015

Locobob,

In my case I have to disagree with you on the fuel scheduling after porting. When you did my plenum and injector housings it ran a little better but felt lean. When Marc reprogrammed my chip it ran a lot better, actually much stronger. Maybe it was just my set up to begin with, factory. Whether you did mine 35mm or 36mm only you know.

Jim

chris313scorpion · 04-27-2015

Pete,

How much more to do the disassembly also? ie drive my car to you, you disassemble, port and reassemble and I come get the car?

04-24-2015	#21
Locobob Join Date: Jan 2004 Location: Portland, OR Posts: 1,057	Re: ported plenum and injector housings.. There is enough extra fuel in the factory proms WOT program to support some breathing mods. You can generally get away with headers or porting but not both without adding fuel. __________________ Robert ZR-1 Net Registry Oregon State Director 91 ZR-1 #431 Black/Black LPE 368

04-24-2015	#22
Pete Join Date: Dec 2003 Location: Chicagoland,IL Posts: 2,679	Re: ported plenum and injector housings.. We need to clarify,there is some differences in porting. The price does not tell the whole story. There is two different ways to porting 35mm and 36mm On the 35mm i use a 35mm gauge ball that will drop straight thru primary port (1990-1992 IH's). On the 36mm porting i use a 36mm gauge ball that will drop straight thru (1990-1992 IH's) 35mm $650 this is very easy and less time consuming no fears 36mm more time consuming have to be very careful getting close to water and oil jackets most don't do 36mm $1000 $150 reprogram prom. On my IH's i made the 36.5mm gauge ball drop thru this is very scary my IH's are like l98 intake runners Pete __________________ '91 #1635 PoloGreen 350 LT5 11.09 @ 129.27 11.04 @ 128.86 474RWHP 400RWTQ http://www.youtube.com/watch?v=SFNFOhGGlR4 http://www.youtube.com/watch?v=ZlRIOMwaDYY https://sites.google.com/site/peteszr1garage

04-25-2015	#23
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,194	Re: ported plenum and injector housings.. Just to clarify, Anyone who has had their intake ported by me knows the ports are larger than 35MM,typically the smallest part of my primary runners are 35.3-35.5MM+ around water jacket areas. I leave some safety margins as with powdercoating you have to sandblast....going too thin and you start blowing through the runner walls. I enjoy doing porting which is why I offer it at a reasonable price. Both Pete and Locobob do a great/awesome job with their porting. I started doing this as a low cost alternative for those that could not afford more expensive porting. __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

04-25-2015	#24
Vette73 Join Date: Nov 2014 Location: Brooklyn ny Posts: 1,045	Re: ported plenum and injector housings.. Yes.....Better to be safe than sorry....Will be in touch soon .. John...

04-25-2015	#25
Jim Nolan Join Date: Jan 2007 Location: Florida Posts: 241	Re: ported plenum and injector housings.. Locobob, In my case I have to disagree with you on the fuel scheduling after porting. When you did my plenum and injector housings it ran a little better but felt lean. When Marc reprogrammed my chip it ran a lot better, actually much stronger. Maybe it was just my set up to begin with, factory. Whether you did mine 35mm or 36mm only you know. Jim Last edited by Jim Nolan; 04-25-2015 at 12:44 PM.

04-27-2015	#26
chris313scorpion Join Date: Nov 2011 Location: Chagrin Falls, OH Posts: 6	Re: ported plenum and injector housings.. Pete, How much more to do the disassembly also? ie drive my car to you, you disassemble, port and reassemble and I come get the car?