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#1
10-09-2013, 01:18 AM
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Dyno'd my son's 434
Last week my son Jake and I finally got to dyno his 434 pump gas engine that will be going into his 67 firebird. The car is getting mini tubbed, mono leafs, cal-tracs and a set of 295/55/15 drag radials. It's also getting 4 wheel Strange disc brakes and a Tony Orts style 4" cowl fiberglass hood. The trans is a TH-400. Jake is 15 right now and has already paid off his bird. (I went 50/50 with him). He wants to use the car as a street/strip car for his high school years. Jake speced the build from the beginning when he was 12. He bought a 67 400 block from Hooter back then. Over the next 3 years, here is what the combo turned out to be:
400 block bored to 4.155 Hard blocked to the freeze plugs 4 bolt Billet splayed mains installed Scat 4.00 " crank Callies 6.8 H beam rods Diamond pistons Total Seal file fit rings (gapped for 150 shot) Canton 15-452 oil pan Butler crank scraper Edelbrock 72 cc Heads (ported by Jake) finished by Calvin Hill 309 cfm @ .600 lift, PAC beehive springs for solid flat tappet, 10.87:1 comp Howard's solid lifters with oiling hole Butler .116 wall pushrods Mega brace installed (for future roller build up) Comp Cams solid flat cam 254/262 @ .050 .615 lift Victor intake gasket matched Holley Ultra HP 850 MSD Pro billet distributor Jake assembled the engine with my guidance. All the machine work was done by Goodwin Competition in Omro Wisconsin. Todd Goodwin used to successfully campaign a Dodge Viper in NMCA Pro Stock years ago. Jake went into the dyno session hoping to break 550 HP. I thought it might pull off around 575 HP if we did everything right. Well, it did much better than we anticipated!! After break in, the 434 was only pulled to 5200 to get things going. It made 544 HP @ 5200 first pull !! On 91 octane. No vacuum pump yet, box stock Holley, and only 32 degrees of timing. Jake & I were grinning from ear to ear. At this point we looked at each other and thought we might be able to hit the number we secretly hoped for! After more tuning we got 602 HP/6000 and 577 TQ/4800 on 91 octane!! At this point, we installed the Moroso 3 vane vacuum pump, bumped timing to 37 degrees, and poured in VP 110. The last pull we spun the little 434 to 7000 rpm and it turned out 612 HP/6000 and 573 TQ/5200. The wildest part of the pulls, was the horsepower never dropped off after 6000 rpm more than 1 HP. We got data to 6700 after the 7000 rpm pull. Needless to say Jake and I were more than happy with the engine! Here is a video of that 7000 rpm pull. http://youtu.be/c343eeXna0w Dyno sheets to follow soon. Brian
__________________
 Boobs & bacon 
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#2
10-09-2013, 01:33 AM
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Nice combo... wouldnt mind that combo in a street car myself!
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#3
10-09-2013, 01:44 AM
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Great results. Going to be a sweet car when done.
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65 Lemans Street Car - 521, T400, 3.70 9". 10.13 @ 135. 3770 lbs. Drag Week ‘14, ‘15, ‘17 63 Lemans Race Car- 8.81 @ 151, 5.60 @ 123(SOLD) 67 Bonneville ragtop 74 Firebird - 455, e heads, TK0600 in process |
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#4
10-09-2013, 01:45 AM
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Video of 434 idling
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Boobs & bacon
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#5
10-09-2013, 02:27 AM
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I would have spent my entire high school driving career grounded with power like that. Congrats on the #'s. Have some fun with it!!!
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#6
10-09-2013, 07:26 AM
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Congrats!
That is some fantastic power from that engine. I think your son and you did good. 
__________________
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 |
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#7
10-09-2013, 08:11 AM
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Outstanding!
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EHTTFMF!  Being dead, it is not hard on you. You don't even know you're dead. It is hard on everyone else that is not dead. BEING STUPID WORKS THE SAME WAY! The rest of us suffer. |
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#8
10-09-2013, 08:34 AM
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awesome!!!! i know from this last weekend with my son how excited and proud you are. congrats!!!
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#9
10-09-2013, 08:47 AM
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Thanks guys!!! Really appreciate it!
Brian
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Boobs & bacon
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#10
10-09-2013, 08:52 AM
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Very nice #s.
Does your son want an EHTTFMF sticker too?
__________________
First Pontiac powered street car in the 7's 7.940@170.84. 3460#s |
| The Following User Says Thank You to LiL Jack For This Useful Post: | ||
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#11
10-09-2013, 08:53 AM
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And those 150 shots of nitrous turn into 250 real quick
__________________
First Pontiac powered street car in the 7's 7.940@170.84. 3460#s |
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#12
10-09-2013, 08:55 AM
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Great accomplishments for father and son! The results speak for themselves but the fact that your son paid for his share, carried the load, ported his heads (!) and has been focused on this the last few years should make you both proud.
I'm a few thousand miles from you but I am pretty sure I can see you beaming with well deserved pride for him. |
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#13
10-09-2013, 09:06 AM
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Quote:
Brian
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Boobs & bacon
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#14
10-09-2013, 09:19 AM
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Awesome!
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DOC'S TA  Turbo 535, CV 1 heads. Built by Cerralli Competition Engines Tenth Anniversary (Van Nuys) restored. Tenth Anniversary Barn Find (Norwood) Both 4 speeds! |
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#15
10-09-2013, 10:27 AM
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Congrats to you and your son on a great combo. Nice to see families doing Pontiacs together.
My son and I have race our Catalina together and have a blast. Jim
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65 Catalina sedan. Allen Thomas Performance 495. KRE Heads at 310cfm ported by SD Performance, ProSystems Dominator carb on ported Victor intake, P-Dude custom grind hydraulic roller, MSD ignition, 3.50 Moser/Ford rear. F-Glass front bumper by son Rob, rear by the old man and joint effort for trunk lid. 3950# w/driver. Best of 9.5761/139 on 175 shot, 6.01 /114 in 1/8. |
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#16
10-09-2013, 12:09 PM
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Very impressive, especially with a flat tappet cam! Super father/son project...you and your son have every right to be extremely proud.
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#17
10-09-2013, 02:53 PM
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What a great combo.
When will it go in? |
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#18
10-09-2013, 02:55 PM
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So cool, congrats to you and your son.
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#19
10-09-2013, 03:22 PM
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This is great, always nice to see a father and son project especially when they work out so well!
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#20
10-09-2013, 03:46 PM
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Congrats.
That's a great combo with fantastic results. You should both be very proud!
__________________
www.hobracing.com |
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