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#1
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First Look @@ High Performance Injuns SpeedMaster Heads
First Look at the SpeedMaster Pontiac Heads. I’m impressed with the casting quality, heli-coils where they need to be, machine work looks good. Oil return looks well thought out. High Performance Injuns is offering these for the introductory price of only $1759 a pair picked up at the shop or customer pays actual shipping.
Cylinder Head Material: Aluminum Cylinder Head Finish: Natural Combustion Chamber Volume (cc): 72 cc CNC-Machined Combustion Chamber: Yes Intake Runner Volume (cc): 215 cc Exhaust Runner Volume (cc): 175 cc CNC-Machined Intake Runner: No CNC-Machined Exhaust Runner: No Intake Port Shape: Ram Air IV Intake Port Location: Standard Exhaust Port Shape: Ram Air IV Exhaust Port Location: Standard Spark Plug Style: Angled Comp. Valve Job: Yes Intake Valves Included: Yes Intake Valve Diameter (in): 2.110 in. Exhaust Valves Included: Yes Exhaust Valve Diameter (in): 1.660 in. Valve Springs Included: Yes Maximum Valve Lift (in): 0.580 in. Outside Diameter of Outer Spring (in): 1.450 in. Damper Spring Included: Yes Number of Springs Per Valve: Dual Retainers Included: Yes Retainer Material: Chromoly steel Locks Included: Yes Lock Style: 10 degree Valve Stem Seals Included: Yes Valve Stem Seal Style: Positive stop Rocker Arm Studs Included: No Rocker Arms Included: No Rocker Arm Nuts Included: No Guideplates Included: No Valve Cover Mounting Style: Center & Perimeter Bolt Accessory Bolt Holes Drilled: Yes Intake Valve Angle: 14 deg. Exhaust Valve Angle: 14 deg. Valve Guides Included: Yes Valve Guide Material: Bronze Valve Seats Machined: Yes Valve Seat Machine Style: 3-angle Valve Seat Material: Ductile iron Steam Holes Drilled: No Oiling Style: Through pushrod Machined for O-Ring: No Heat Crossover: No Quantity: Sold as a pair. Assembly Specifications Max Lift: .580" Coil Bind: .740" Intake Install: 135lbs @ 1.8 Exhaust Install: 135lbs @ 1.8 Closed Sear Pressure: 125lbs Open Seat Pressure: 320lbs
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Randy Repp 1964 GTO "GoatZilla" 1964 GTO "Injunuity" A/FX Nostalgia Super Stock 220" Rear Engine Pontiac Powered Dragster https://www.facebook.com/PontiacSpeedShop/ https://www.facebook.com/GoatZillaRacing/ https://www.facebook.com/groups/RebuildExcitement/ https://www.facebook.com/Call1844RacersRV/ https://www.facebook.com/groups/INJUNWARS/ |
#2
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First 5 Pics
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Randy Repp 1964 GTO "GoatZilla" 1964 GTO "Injunuity" A/FX Nostalgia Super Stock 220" Rear Engine Pontiac Powered Dragster https://www.facebook.com/PontiacSpeedShop/ https://www.facebook.com/GoatZillaRacing/ https://www.facebook.com/groups/RebuildExcitement/ https://www.facebook.com/Call1844RacersRV/ https://www.facebook.com/groups/INJUNWARS/ |
#3
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Next 5
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Randy Repp 1964 GTO "GoatZilla" 1964 GTO "Injunuity" A/FX Nostalgia Super Stock 220" Rear Engine Pontiac Powered Dragster https://www.facebook.com/PontiacSpeedShop/ https://www.facebook.com/GoatZillaRacing/ https://www.facebook.com/groups/RebuildExcitement/ https://www.facebook.com/Call1844RacersRV/ https://www.facebook.com/groups/INJUNWARS/ |
#4
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Next 5
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Randy Repp 1964 GTO "GoatZilla" 1964 GTO "Injunuity" A/FX Nostalgia Super Stock 220" Rear Engine Pontiac Powered Dragster https://www.facebook.com/PontiacSpeedShop/ https://www.facebook.com/GoatZillaRacing/ https://www.facebook.com/groups/RebuildExcitement/ https://www.facebook.com/Call1844RacersRV/ https://www.facebook.com/groups/INJUNWARS/ |
#5
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Any head flow specs?
Thanks for the pics/info.
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John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates |
#6
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Working on the flow numbers now. Many more pics to come.
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Randy Repp 1964 GTO "GoatZilla" 1964 GTO "Injunuity" A/FX Nostalgia Super Stock 220" Rear Engine Pontiac Powered Dragster https://www.facebook.com/PontiacSpeedShop/ https://www.facebook.com/GoatZillaRacing/ https://www.facebook.com/groups/RebuildExcitement/ https://www.facebook.com/Call1844RacersRV/ https://www.facebook.com/groups/INJUNWARS/ |
#7
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Interesting!
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'73 T/A (clone). Low budget stock headed 8.3:1 455, 222/242 116lsa .443/.435 cam. FAST Sportsman EFI, 315rwhp/385rwtq on 87 octane. 13.12 @103.2, 1.91 60'. '67 Firebird [sold], ; 11.27 @ 119.61, 7.167 @ 96.07, with UD 280/280 (108LSA/ 109 ICL)solid cam. [1.537, 7.233 @93.61, 11.46 @ 115.4 w/ old UD 288/296 108 hydraulic cam] Feb '05 HPP, home-ported "16" D-ports, dished pistons (pump gas only), 3.42 gears, 275/60 DR's, 750DP, T2, full exhaust |
#8
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Dare I say it, the casting quality looks (at least on the surface) to be as good, if not better than my KRE's.
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-Jason 1969 Pontiac Firebird |
#9
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The heck with flow numbers, lets see how well the seats are installed as lately this has been a mess on a lot of heads, to the tune of being able to get a .020" feeler gauge in between the seat and the bottom of its Bore!
Such is a snapped off valve in the waiting once enough run time gets on the heads and the seat gets yanked all the way in! Don't get me wrong I don't mean that's the quality level of these heads , I just want to see how 50 or so pairs of them turn out!
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Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
#10
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Quote:
I have seen where the seats do not get set all the way down against the head. This can happen for a few reasons. 1. While installing seats, seat lubricant can get under the seat and prevent it from seating. I get the seat started and blow the lube out from under the seat before I drive it the rest of the way in. 2. More importantly, driving the seats in with a hammer other than a dead blow hammer will cause the seat to bounce up a few thousandths when it hits the bottom of the seat pocket. We tested this extensively. I put seats in aluminum heads with a minimum of .008" press-fit[.002" more than industry standard]. When I tested driving the seats in with a standard steel hammer, I could not get the seat to sit flush no matter how hard I hit it. Then using a dead blow hammer, 1 wack and seats were seated. From now on, I only use a dead blow hammer to seat the seats. 3. If the chamfer on the seat insert is not radiused[I use a Scotchbrite wheel to radius and smooth the chamfer] it can scrape aluminum off the side of the seat pocket and roll it down under the seat. In this case, you will never get it seated. This scenario usually ends up with a large gap like the .020" you mention. The seat bouncing up off the bottom of the seat pocket usually ends up with only about .003"-.005" gap.
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Paul Carter Carter Cryogenics www.cartercryo.com 520-409-7236 Koerner Racing Engines You killed it, We build it! 520-294-5758 64 GTO, under re-construction, 412 CID, also under construction. 87 S-10 Pickup, 321,000 miles 99Monte Carlo, 293,000 miles 86 Bronco, 218,000 miles |
#11
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GoatZilla - thank you for taking the time to share this info.
Paul - Great info. On these mass produced heads, are the seats installed by machine/robot?
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Will Rivera '69 Firebird 400/461, 290+ E D-Ports, HR 230/236, 4l80E, 8.5 Rear, 3.55 gears ‘66 Lemans, 455, KRE D-Ports, TH350, 12 bolt 3.90 gears '69 LeMans Vert, 350, #47 heads: work in progress Last edited by grivera; 04-18-2019 at 02:27 PM. |
#12
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Those are pretty interesting! The price is great if they prove to be a worthy competitor to the Edelbrocks and KREs.
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"Those poor souls have made the fatal mistake of surrounding us. Now we can fire in any direction" 1970 Trans Am RAIII 4 speed 1971 Trans Am 5.3 LM7 1977 Trans Am W72 Y82 1987 Grand National |
#13
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Flow chart from Hi-Performanc Injuns face book page
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#14
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Nice Numbers.
Since I don't do FaceBook. Does it say if the exhaust is with or without a pipe? Stan
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Stan Weiss/World Wide Enterprises Offering Performance Software Since 1987 http://www.magneticlynx.com/carfor/carfor.htm David Vizard & Stan Weiss' IOP / Flow / Induction Optimization - Cam Selection Software http://www.magneticlynx.com/DV Download FREE 14 Trial IOP / Flow Software http://www.magneticlynx.com/DV/Flow_..._Day_Trial.php Pontiac Pump Gas List http://www.magneticlynx.com/carfor/pont_gas.htm Using PMD Block and Heads List http://www.magneticlynx.com/carfor/pont_pmd.htm |
#15
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1/2 inch radius intake plate and short stack exhaust tube
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Randy Repp 1964 GTO "GoatZilla" 1964 GTO "Injunuity" A/FX Nostalgia Super Stock 220" Rear Engine Pontiac Powered Dragster https://www.facebook.com/PontiacSpeedShop/ https://www.facebook.com/GoatZillaRacing/ https://www.facebook.com/groups/RebuildExcitement/ https://www.facebook.com/Call1844RacersRV/ https://www.facebook.com/groups/INJUNWARS/ |
#16
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Eddy vs SpeedMaster Comparison
Here's a Simple Comparison of Edelbrock 72cc CNC Heads and our SpeedMaster 72cc CNC Heads.
These are as cast numbers using a Superflow SF600 @ 28". Winning Numbers are in RED. Price Comparison is using Summit's sale price on Edelbrocks and High Performance Injuns sale price on SpeedMasters. Both include shipping. More Flow for Less Dough. What else can you buy with your $1266 $aving$? Intake? Cam/Lifters? Headers? All of this! Fully machined heads with seats and guides but no valves, valve springs, retainers, etc are also on sale at $1549 a pair with shipping included. PayPal Accepted at PayPal.me/RPM.tv or send checks to: High Performance Injuns 1632 E Northfield Dr #500 Brownsburg, IN 46112
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Randy Repp 1964 GTO "GoatZilla" 1964 GTO "Injunuity" A/FX Nostalgia Super Stock 220" Rear Engine Pontiac Powered Dragster https://www.facebook.com/PontiacSpeedShop/ https://www.facebook.com/GoatZillaRacing/ https://www.facebook.com/groups/RebuildExcitement/ https://www.facebook.com/Call1844RacersRV/ https://www.facebook.com/groups/INJUNWARS/ Last edited by GoatZillaRacing; 04-18-2019 at 07:45 PM. |
#17
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Quote:
What bore size was used for the flow data? |
#18
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What brand are the valves, springs, retainers, rocker studs, etc?
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Will Rivera '69 Firebird 400/461, 290+ E D-Ports, HR 230/236, 4l80E, 8.5 Rear, 3.55 gears ‘66 Lemans, 455, KRE D-Ports, TH350, 12 bolt 3.90 gears '69 LeMans Vert, 350, #47 heads: work in progress |
#19
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4.150. These will flow higher with a larger bore and even more once the CNC porting programs are completed.
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Randy Repp 1964 GTO "GoatZilla" 1964 GTO "Injunuity" A/FX Nostalgia Super Stock 220" Rear Engine Pontiac Powered Dragster https://www.facebook.com/PontiacSpeedShop/ https://www.facebook.com/GoatZillaRacing/ https://www.facebook.com/groups/RebuildExcitement/ https://www.facebook.com/Call1844RacersRV/ https://www.facebook.com/groups/INJUNWARS/ |
#20
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Quote:
You can also take advantage of the machined bare castings with seats and guides but no valves, springs etc for only $1549 a pair including shipping.
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Randy Repp 1964 GTO "GoatZilla" 1964 GTO "Injunuity" A/FX Nostalgia Super Stock 220" Rear Engine Pontiac Powered Dragster https://www.facebook.com/PontiacSpeedShop/ https://www.facebook.com/GoatZillaRacing/ https://www.facebook.com/groups/RebuildExcitement/ https://www.facebook.com/Call1844RacersRV/ https://www.facebook.com/groups/INJUNWARS/ |
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