self porting any done this? - ZR-1 Net Registry Forums

bradslt5 · 12-17-2007

well times are tight , but its winter and i got to keep busy. so i thought i might try to port the injector housings and plenum my self . has anyone tried this and what does one need to do the job. any guidence i would be very gratefull for . I am not trying to take money away from anyone ,I just cant afford to send this out right now .

flyin ryan · 12-17-2007

don't go too BIG. try to keep the taper around 4% best you can. have you ever picked up a die grinder?

bradslt5 · 12-17-2007

thank you for the info . no i need to get a di grinder what one is best plus what type of attachment will i need . would removing most of the injector hump create the biggest gain ? i have a done set (by corey) on my other car would having those in front of me help?

GrayZ · 12-17-2007

Brad, this is just my humble opinion, but, throughout
my many travels, it seems most of the time, i attack
a mechanical problem, without the aid of an expert
it ends up, costing me, the parts
i screw up, plus the cost of the initial mechanic fee.
jeffvette, has got a "Honey" of a deal, goin right now.
Him and LocoBob have done ton's of these porting jobs.
I'd go with the pro's. Or not.

blackjack · 12-17-2007

the thing is to make all those holes similar,and believe me,it aint easy...i port harley heads,only 4 holes and i have to retouch a couple of times...i bought goldstein's plenum and injector housings from his drag car,and recontoured it myself around the injector nozzle...thats when i realized i dont have the patience for 16 ports !! like we say in the harley world,dont play jerry branch unless you ARE jerry branch
first thing youll do is slip with the die grinder,and notch the valve seat !!...
next,your injector housing port wont align with the plenum and/or the heads...then you will drop chips in the motor,'cause you will forget about that little pocket full of debris...
you can still go ahead and do it,but remember....we told you so !!

jmho
bj

bradslt5 · 12-17-2007

thankyou guys . i would be a fool not to listen to you.

so I guess i will have to find another project . i am very thankfull that you guys were honest enough to tell it like it is . merry xmas to all

DaveK · 12-19-2007

Reminds me of the old joke:

Tourist admiring the lawns at Cambridge University, they're flat as a billiard table and incredibly manicured. He spots a gardener and tells him how amazed he is and that he wants a similar lawn, so what's the secret. The gardener smiles and says "well, you just need a little grass seed.. and about 500 years experience.."

Vette Guy · 12-24-2007

Yes, I've ported my plenum and injector housings... The first time I went into the plenum, I simply took out the casting marks and port matched the plenum to the IHs... My Z went from 318 RWHP to mid 340s on the porting alone - roughly 25 RWHP gain. After adding headers and adjusting the chip, I made 372 HWHP at SGC in 2004. After seeing a few other porting jobs from some of the known porting guys, I decided to go deeper and siameese the plenum and open up the IHs to 36mm. While I have not dynoed the Z since my last round of porting a few years ago, I believe I've gained quite a bit more RWHP, but at the expense of my mid-range torque. Looks great on paper in that I could never use all my mid-range torque with the 4:10 rear without spinning tires. Now I have a different "problem"... I don't spin tires very much in the mid RPM range, however the rear tires break loose in the upper RPM range.... so at 55mph, I lose traction. Seat of the pants, it is much faster in the upper RPMs, but I sure do miss the low/mid RPM torque. I may be able to work it more in the chip, but have not had time for it... Before you get started, you need to ask yourself what you want from your Z.... Believe there is some give and take with every mod. I've attached a few photos taken along the way.... I used my trusty die grinder, the bits in the photos, and my homemade 36mm porting ball... the red line around the ball was made with a red sharpe and left a mark exactly where I needed to grind to make a uniform 36mm port job.

Before I get flamed, I know there are much better porting jobs out there, and done by better experts than I, but I enjoy doing these projects.... May not be as good as others, but better than some I've seen... It's my Z and I take the time to it the best I can.... I hope these photos will help you decide what you want to do.

Vette Guy · 12-24-2007

Best Regards,

Mark

cuisinartvette · 12-24-2007

Quote:

so i guess the work will never be done . but thats ok dont have to beg for cash for the cars , which is good by me.

Not following that, are you selling your cars?

12-17-2007	#1
bradslt5 Join Date: Oct 2007 Location: lone pine and mammoth lakes ca. Posts: 544	self porting any done this? well times are tight , but its winter and i got to keep busy. so i thought i might try to port the injector housings and plenum my self . has anyone tried this and what does one need to do the job. any guidence i would be very gratefull for . I am not trying to take money away from anyone ,I just cant afford to send this out right now .

12-17-2007	#2
flyin ryan Join Date: Aug 2006 Location: Edmonton, Alberta or Phoenix, Arizona Posts: 2,741	Re: self porting any done this? don't go too BIG. try to keep the taper around 4% best you can. have you ever picked up a die grinder? __________________ There are no limit's mans ingenuity, just as mans ingenuity will never conquer the forces & behavior of this planet...Smokey Y.

12-17-2007	#3
bradslt5 Join Date: Oct 2007 Location: lone pine and mammoth lakes ca. Posts: 544	Re: self porting any done this? thank you for the info . no i need to get a di grinder what one is best plus what type of attachment will i need . would removing most of the injector hump create the biggest gain ? i have a done set (by corey) on my other car would having those in front of me help?

12-17-2007	#4
GrayZ Join Date: Mar 2006 Location: Innsbrook, Missouri Posts: 1,727	Re: self porting any done this? Brad, this is just my humble opinion, but, throughout my many travels, it seems most of the time, i attack a mechanical problem, without the aid of an expert it ends up, costing me, the parts i screw up, plus the cost of the initial mechanic fee. jeffvette, has got a "Honey" of a deal, goin right now. Him and LocoBob have done ton's of these porting jobs. I'd go with the pro's. Or not.

12-17-2007	#5
blackjack Join Date: Aug 2005 Location: north of montreal Posts: 510	Re: self porting any done this? the thing is to make all those holes similar,and believe me,it aint easy...i port harley heads,only 4 holes and i have to retouch a couple of times...i bought goldstein's plenum and injector housings from his drag car,and recontoured it myself around the injector nozzle...thats when i realized i dont have the patience for 16 ports !! like we say in the harley world,dont play jerry branch unless you ARE jerry branch first thing youll do is slip with the die grinder,and notch the valve seat !!... next,your injector housing port wont align with the plenum and/or the heads...then you will drop chips in the motor,'cause you will forget about that little pocket full of debris... you can still go ahead and do it,but remember....we told you so !! jmho bj

12-19-2007	#7
DaveK Join Date: Jul 2004 Location: Sudbury, Ontario. Canada Posts: 1,538	Re: self porting any done this? Reminds me of the old joke: Tourist admiring the lawns at Cambridge University, they're flat as a billiard table and incredibly manicured. He spots a gardener and tells him how amazed he is and that he wants a similar lawn, so what's the secret. The gardener smiles and says "well, you just need a little grass seed.. and about 500 years experience.." __________________ 1991 #1516 Black/Black davidmkelly.com "Speed is often confused with insight." - Johan Cruijff

12-24-2007	#8
Vette Guy Join Date: Jul 2005 Location: San Antonio, TX Posts: 652	Re: self porting any done this? Yes, I've ported my plenum and injector housings... The first time I went into the plenum, I simply took out the casting marks and port matched the plenum to the IHs... My Z went from 318 RWHP to mid 340s on the porting alone - roughly 25 RWHP gain. After adding headers and adjusting the chip, I made 372 HWHP at SGC in 2004. After seeing a few other porting jobs from some of the known porting guys, I decided to go deeper and siameese the plenum and open up the IHs to 36mm. While I have not dynoed the Z since my last round of porting a few years ago, I believe I've gained quite a bit more RWHP, but at the expense of my mid-range torque. Looks great on paper in that I could never use all my mid-range torque with the 4:10 rear without spinning tires. Now I have a different "problem"... I don't spin tires very much in the mid RPM range, however the rear tires break loose in the upper RPM range.... so at 55mph, I lose traction. Seat of the pants, it is much faster in the upper RPMs, but I sure do miss the low/mid RPM torque. I may be able to work it more in the chip, but have not had time for it... Before you get started, you need to ask yourself what you want from your Z.... Believe there is some give and take with every mod. I've attached a few photos taken along the way.... I used my trusty die grinder, the bits in the photos, and my homemade 36mm porting ball... the red line around the ball was made with a red sharpe and left a mark exactly where I needed to grind to make a uniform 36mm port job. Before I get flamed, I know there are much better porting jobs out there, and done by better experts than I, but I enjoy doing these projects.... May not be as good as others, but better than some I've seen... It's my Z and I take the time to it the best I can.... I hope these photos will help you decide what you want to do.

12-24-2007	#9
Vette Guy Join Date: Jul 2005 Location: San Antonio, TX Posts: 652	Re: self porting any done this? Best Regards, Mark