ZR-1 Net Registry Forums  

Go Back   ZR-1 Net Registry Forums > C4 ZR-1 > C4 ZR-1 Technical Postings

Reply
 
Thread Tools Display Modes
Old 04-13-2015   #1
Vette73
 
Join Date: Nov 2014
Location: Brooklyn ny
Posts: 1,045
Default ported plenum and injector housings..

Thinking of doing this mod to my 91....Just had headers cat back hurst shifter ,Haiback chip and intake temp sensor wire relocated to the front near the air filter done to the car..

Really liked the additional horsepower gains i picked up and of course the sound........I know a lot of members port the plenum and injector housings.......Is the horsepower gains throughout the rev range or more up on top? Im not to hung up on peak horsepower numbers,more impressed with seat of the pants feel..

Thanks....
Vette73 is offline   Reply With Quote
Old 04-13-2015   #2
efnfast
 
Join Date: Nov 2011
Location: Dunbarton NH
Posts: 7,486
Default Re: ported plenum and injector housings..

I bought a set of injector housings and plenum from Locobob. HP went from 353 to 397 RWHP. I was pleased. Problem with seat of the pants was the winter. I parked the car with 353 hp, five months later I got to drive it with 397 hp, long delay to try to judge s.o.t.p.
efnfast is offline   Reply With Quote
Old 04-13-2015   #3
Karl
 
Karl's Avatar
 
Join Date: May 2013
Location: Chicago
Posts: 980
Default Re: ported plenum and injector housings..

Efnfast what else is done to your car? 44rwhp from the plenum and injector housing is amazing!
__________________
1993 ZR-1 #211 Yellow On Beige Beast #2
1992 ZR-1 #427 Black On Black *Sold*
1985 L98 Blue On Blue *Sold*
Karl is offline   Reply With Quote
Old 04-13-2015   #4
efnfast
 
Join Date: Nov 2011
Location: Dunbarton NH
Posts: 7,486
Default Re: ported plenum and injector housings..

injectors, coils and wires. But I don't attribute any of that to HP gains. Locobob did a trade with me. My car also has headers, exhaust, and a Marc H chip, but that stuff got me from 311 hp to 353. -Steve
efnfast is offline   Reply With Quote
Old 04-16-2015   #5
Billy Mild
 
Join Date: Aug 2014
Location: Kansas City, MO
Posts: 838
Default Re: ported plenum and injector housings..

Quote:
Originally Posted by efnfast View Post
I bought a set of injector housings and plenum from Locobob. HP went from 353 to 397 RWHP. I was pleased. Problem with seat of the pants was the winter. I parked the car with 353 hp, five months later I got to drive it with 397 hp, long delay to try to judge s.o.t.p.
That is impressive power. Can't wait to start the mods. Haha.
__________________
Looking for a ZR-1
1985 Yamaha RZ350-NOT STOCK
1971 Yamaha AT1-Middle of a restoration
Billy Mild is offline   Reply With Quote
Old 04-16-2015   #6
TRU_ZR-1
 
Join Date: Apr 2015
Location: boise, id
Posts: 8
Default Re: ported plenum and injector housings..

it is definitely worth doing.
__________________
[SIGPIC][/SIGPIC]1991 #235
TRU_ZR-1 is offline   Reply With Quote
Old 04-17-2015   #7
Paul Workman
 
Paul Workman's Avatar
 
Join Date: Nov 2007
Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri
Posts: 6,493
Default Re: ported plenum and injector housings..

Quote:
Originally Posted by efnfast View Post
I bought a set of injector housings and plenum from Locobob. HP went from 353 to 397 RWHP. I was pleased. Problem with seat of the pants was the winter. I parked the car with 353 hp, five months later I got to drive it with 397 hp, long delay to try to judge s.o.t.p.
Glad to hear you're happy wid um! Locobob is meticulous in his work, and I'm not surprised at the gains you got.
__________________
Good carz, good food, good friendz = the best of timez!

90 #1202
"FBI" top end ported & relieved
Cam timing by "Pete the Greek"
Sans secondaries
Chip & dyno tuning by Haibeck Automotive
SW headers, X-pipe, MF muffs

Former Secretary, ZR-1 Net Registry
Paul Workman is offline   Reply With Quote
Old 04-22-2015   #8
JohnWins
 
Join Date: Jun 2014
Location: Pope AFB, N.C.
Posts: 5
Default Re: ported plenum and injector housings..

How much does Locobob charge for the porting?
JohnWins is offline   Reply With Quote
Old 04-22-2015   #9
Vette73
 
Join Date: Nov 2014
Location: Brooklyn ny
Posts: 1,045
Default Re: ported plenum and injector housings..

700 for the porting....From what I understand is you send him 700.....He ports one, sends you the plenum when it's ready....Then you send him yours...
Vette73 is offline   Reply With Quote
Old 04-22-2015   #10
Locobob
 
Join Date: Jan 2004
Location: Portland, OR
Posts: 1,057
Default Re: ported plenum and injector housings..

Actually I charge $900 to do a customer supplied, $1500 for my core - $600 refunded with core return. I do these completely by hand - usually 60-70 hours of meticulous work.
__________________
Robert

ZR-1 Net Registry Oregon State Director

91 ZR-1 #431 Black/Black LPE 368
Locobob is offline   Reply With Quote
Reply


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 08:41 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright ZR-1 Net Registry 2020