|
12-20-2010
|
#1 |
 Join Date: Jan 2004
Location: Portland, OR
Posts: 1,057
|
Some "Dynomite" Heads!
Just getting started on Dynomite's head porting so I thought I'd share as I go along. Some interesting measurements from the stock (untouched) heads:
Combustion Chambers came in around 41cc with not much deviation, this was using my own method and a spark plug in the hole. Intake runner dimensions: Diameter at IH gasket surface: Primary 32.3mm, Secondary 36.4mm Diameter, narrowest point of runner: Primary 32mm, Secondary 32mm (just upstream of valve guide) Runner width at valve guide: Primary 33mm, Secondary 33mm Valve seat diameter: Primary 34.7mm, Secondary 34.7mm Exhaust port dimensions: Valve seat diameter: 32mm Width across valve guide: 34.8mm Runner narrowest point: 31.5mm (where ports merge into one) Header gasket surface: 51.8mm long, 35.6 tall
__________________
Robert ZR-1 Net Registry Oregon State Director 91 ZR-1 #431 Black/Black LPE 368 |
|
|
|
12-20-2010
|
#2 |
|
Join Date: Jan 2004
Location: Portland, OR
Posts: 1,057
|
Re: Some "Dynomite" Heads!
Some close ups of the chambers:
   The worst areas are hard to see, sharp edges and poor transitions an inch or so above the valve seats.
__________________
Robert ZR-1 Net Registry Oregon State Director 91 ZR-1 #431 Black/Black LPE 368 |
|
|
|
|
12-20-2010
|
#3 |
|
Join Date: Jan 2004
Location: Portland, OR
Posts: 1,057
|
Re: Some "Dynomite" Heads!
Looking down the intake runners:
It would appear from the measurements I made that the two runners are mirror image castings with only the machining done to the top of the secondary port differentiating them.  Exhaust ports:  Here is the template I made off the bottom of the injector housings which I had enlarged only slightly. You can see just how skewed the port alignment is from the factory. It is noticeably worse on the primary runners, secondaries are closer probably due to the machine work done on these.  And marked on the head without the template 
__________________
Robert ZR-1 Net Registry Oregon State Director 91 ZR-1 #431 Black/Black LPE 368 Last edited by Locobob; 12-20-2010 at 01:08 AM. |
|
|
|
|
12-20-2010
|
#4 |
 Join Date: Jul 2009
Location: Texas
Posts: 793
|
Re: Some "Dynomite" Heads!
Excellent work Sir, keep the pictures coming.
|
|
|
|
|
12-20-2010
|
#5 |
|
Join Date: Sep 2005
Location: Washington
Posts: 955
|
Re: Some "Dynomite" Heads!
are those the fire sale heads
|
|
|
|
|
12-20-2010
|
#6 |
 
Join Date: Jun 2005
Location: pittsburgh
Posts: 4,632
|
Re: Some "Dynomite" Heads!
glad to see your heads getting some love
__________________
It's not the car, it's the people - Doug Johnson 90 r/r "KEYS ON" nick named "T.L.B" |
|
|
|
|
12-21-2010
|
#7 |
Join Date: Dec 2004
Location: Jacksonville, FL USA
Posts: 4,645
|
Re: Some "Dynomite" Heads!
( insert wolf whistle here ) It's nice to see your car getting some head work dunn
  Tom
__________________
1990 ZR-1, Black/grey, #2233, stock. ZR-1 Net Reg Founding Member #316 & NCM member |
|
|
|
|
12-21-2010
|
#8 |
Join Date: Dec 2003
Location: Arcadia,OK
Posts: 3,394
|
Re: Some "Dynomite" Heads!
Great pictures Bob. When I first started making gaskets, I used LT5 engine drawings & made them to that spec. Scared the bejesus out of me when I check fit to early style engine parts. Looking forward to seeing the entire series, all the way to the finish line. 
__________________
Jerry Downey JERRYS LT5 GASKETS & PARTS http://www.jerrysgaskets.com 1994 ZR-1, Black/Black, Lingenfelter Aerobody, 416cu in, 3.91 gears, coil-over susp, Brembo brakes, etc. 2016 Black-Red, 3LT-Z51 Auto 8-speed. |
|
|
|
|
12-21-2010
|
#9 | |
Join Date: Mar 2004
Location: Found Member
Posts: 4,346
|
Re: Some "Dynomite" Heads!
Quote:
 Agreed
|
|
|
|
|
|
12-21-2010
|
#10 | |
  
Join Date: May 2007
Location: Peoria, AZ
Posts: 9,155
|
Re: Some "Dynomite" Heads!
Quote:
__________________
GOLDCYLON - 91 ZR-1 #2014 GOLDCYLON - 90 ZR-1 #2794, 4L60e (Formerly Schrade's) GOLDCYLON - 11 CTS-V Arizona State Director  91 WHITE/BLACK #2014. 380 P&P&PCed,Ported Heads, Jeal Long tubes, Corsa Exhaust/FIKSE FM-5s /LED TLs, LED Headlights, Front Wilwood 6 piston narrowlite calipers and rear Wilwood caliper street shop mod,CNCed Coolant Pipes,TPI Cvr,Filter cover,Stainless Bolts, DRM/DOM PROM /ZFDOC mod build #102,DRLs,BMAD with stainless Debris Screen,Coplan Air Blaster, Pioneer APP Radio 4,Brey-Krause HB,Sub Bar,Fire extinguisher seat mount,DRM Coilovers,LEDs everywhere,Compass mirror (orange),V1 DIC hidden display, Homelink sun visor, Carbon Fiber top x3 and APSIS Carbon Fiber interior, APSIS CF Steering Wheel/NAPA Leather, Banski trailing arms, Guldstrand front suspension,urethane bushings from Prothane (total suspension) ZFDoc drive shaft safety loop, raptor shift light (orange),AO engineering louver front plate, Console seat cushion, 96CE seats with black custom Sheepskins, ss billet catch can,Viper remote entry/alarm,Cragar Rear Louvers,LED side louver lights, Dewitts Radiator with SPAL fans and a Woods 160 T-Stat 90 RED/BLACK #2794. 4L60e Automatic Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless Headers, Corsa Exhaust, SAN Secondaries and Haibeck PROM, Exotic Muscle Coil overs, LED Interior Lights, LED Tail Lights, LED Headlights, 94 Sport seats with black custom Sheepskins , Cragar rear louvers, GS Front calipers, Banski Trailing arms, APSIS Carbon Fiber steering wheel, Front and Rear Baer Eradispeeds, DRLs, Guldstrand front suspension,urethane bushings from Prothane (total suspension), Dewitt's Raditor with Dual SPAL fans and a Haibeck 170 T-Stat 11 RED/GREY CTS-V |
|
|
|
|
 |
| Thread Tools | |
| Display Modes | |
|
|
Linear Mode
