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#1
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Road Race Engine On Dyno
482 cubic inch
4.25 x 4.25 AllPontiac aluminum block KRE High Port heads as-cast (330 advertised cfm) Bullet Ultradyne SFT cam. 259/267 at .050"; 0.606" net lift with 1.65 Northwind intake Dale Cubic-prepped 1150 Dominator HEI distributor and MSD 6AL box Runing on 50% 90 octane pump gas and 50% VP110 The goal was 600+ hp. Break-in yesterday went great! Outer springs only, 2500 rpm for a half hour. No metal in oil (17) power pulls today. Had a nagging mid-range misfire and it was impossible to get a consistent timing set because the marks were bouncing around. Final conclusions: Dale Cubic dominator is terrific. Mechanical package of engine is bulletproof. HEI distributor was junk. Ended up trying an MSD distributor and it cleared up the misfire. Ended up with 601.4 hp at 5900 rpm and 623.8 ft-lbs at 4400 rpm. 591 ft-lbs at 3500 rpm! Best power at 36 deg total timing Wide power band should be easy to drive without lots of shifting. Eric
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"Everybody has a plan until they get punched in the mouth" noted philosopher Mike Tyson Life begins at the end of your comfort zone. “The mind, once stretched by a new idea, never returns to its original dimensions.” Last edited by Elarson; 03-09-2023 at 10:17 PM. |
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#2
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Very nice! Is the car ready for the engine?
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#3
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No, lots to still do on the car. Carpet and seats took a lot of time to get right. Transmission rebuild going slow.
Eric
__________________
"Everybody has a plan until they get punched in the mouth" noted philosopher Mike Tyson Life begins at the end of your comfort zone. “The mind, once stretched by a new idea, never returns to its original dimensions.” |
The Following User Says Thank You to Elarson For This Useful Post: | ||
#4
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Very nice!
What's the compression? |
#5
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10.5 compression
Eric
__________________
"Everybody has a plan until they get punched in the mouth" noted philosopher Mike Tyson Life begins at the end of your comfort zone. “The mind, once stretched by a new idea, never returns to its original dimensions.” |
#6
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Wet sump?
Oil nozzles to cool pistons? Great appearing car! (no fender-banging, please...)
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Anybody else on this planet campaign a M/T hemi Pontiac for eleven seasons? ... or has built a record breaking DOHC hemi four cylinder Pontiac? ... or has driven a couple laps of Nuerburgring with Tri-Power Pontiac power?(back in 1967) ... or has a Pontiac born the same year as Jim Wangers? (1926} |
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#7
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Very nice!
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#8
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Very nice.600 hp that'll will get you into the corners quicker and out quicker.
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#9
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The motor looks great . I like the colors .
Nice numbers Good luck with it!
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My Half AN Injun..... |
#10
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Wet sump. Melling 80 psi pump with Tin Indian bottom plate, Canton T-pan.
I thought about leaving it natural aluminum, but it just looked too generic. So I went with my favorite Pontiac blue. I went to an open track day at Mid-Ohio last fall just to watch and learn. I got to talking to a few of the regulars about my project. They were amazed to hear I was building a Pontiac engine and one of them said "as long as you can make 450 hp, you should be able to keep up with the pack". Hehehe Eric
__________________
"Everybody has a plan until they get punched in the mouth" noted philosopher Mike Tyson Life begins at the end of your comfort zone. “The mind, once stretched by a new idea, never returns to its original dimensions.” |
The Following User Says Thank You to Elarson For This Useful Post: | ||
#11
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Are those out of the box from
Kre 330 hi ports? Did you happen to flow them? Do you think an iron block would have made much more power? This was cammed to peak that low I assume ? That’s pretty nice flat tappet combo for sure
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1969 carousel red firebird 455, richmond 5 speed 1964 540 gto 1971 lemans sport convertible 1972 Maverick under slow construction |
#12
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Yes, right out of the box. I chose them because I wanted nice flow and heavy walls. No paper thin porting. Did not flow them, but I'm sure the 330 cfm rating is based on the higher lift of a roller cam. SFT is reliable old school.
I don't guess that an iron block would make more power. My main goal here was taking weight off the front of the car to get closer to 50/50 weight distribution. As far as the cam, I told Tim Goolsby that I wanted to make at least 600 hp, didn't want to run above 6500 rpm and wanted a wide power band. Nailed it! That cam doesn't want to idle below 1000 rpm, but OMG it's happy and sounds badass idling at 1200. Eric
__________________
"Everybody has a plan until they get punched in the mouth" noted philosopher Mike Tyson Life begins at the end of your comfort zone. “The mind, once stretched by a new idea, never returns to its original dimensions.” |
The Following 2 Users Say Thank You to Elarson For This Useful Post: | ||
#13
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Power plot looks real good. The Big Stroke Pontiac ought be extremely competitive inroad racing. Even better with a TH400.
HEI questions: locked timing showed time bounce!! aftermarket?, ground wire?, Rotot-Post Phased? Front Damper TQ'd ?! I've experienced an aftermarket HEI having poor performance, but did not see why. |
#14
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Quote:
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#15
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VERY NICE !
A fwiw, reported as cast flow numbers for the HP head : Intake Exhaust .100 85 71 .200 170 129 .300 234 179 .400 284 221 .500 316 248 .600 322 263 .700 331 270 .
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'70 TA / 505 cid / same engine but revised ( previous best 10.63 at 127.05 ) Old information here: http://www.hotrod.com/articles/0712p...tiac-trans-am/ Sponsor of the world's fastest Pontiac powered Ford Fairmont (engine) 5.14 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension https://www.youtube.com/watch?v=qDoJnIP3HgE |
#16
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Here's one of the pulls with the HEI timing going all over the place.
Eric
__________________
"Everybody has a plan until they get punched in the mouth" noted philosopher Mike Tyson Life begins at the end of your comfort zone. “The mind, once stretched by a new idea, never returns to its original dimensions.” |
#17
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The whole philosophy of this engine is to be super reliable and fun to drive.
I'm going to have a 7000 chip in the rev limiter but the whirling parts should be good for lots more. Crower 4.25", 3.00 main billet crank. Molnar "power adder" steel rods Ross pistons 80 psi pump, with oil cooler and dual filters My goal is to have the full team...Mike, Tim, Dave, Michael, Lori and the dogs...be able to come to the track and not have to fix anything. Just watch, eat hot dogs and tell Pontiac stories. Eric
__________________
"Everybody has a plan until they get punched in the mouth" noted philosopher Mike Tyson Life begins at the end of your comfort zone. “The mind, once stretched by a new idea, never returns to its original dimensions.” |
The Following 2 Users Say Thank You to Elarson For This Useful Post: | ||
#18
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Quote:
Eric
__________________
"Everybody has a plan until they get punched in the mouth" noted philosopher Mike Tyson Life begins at the end of your comfort zone. “The mind, once stretched by a new idea, never returns to its original dimensions.” |
#19
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Quote:
Eric
__________________
"Everybody has a plan until they get punched in the mouth" noted philosopher Mike Tyson Life begins at the end of your comfort zone. “The mind, once stretched by a new idea, never returns to its original dimensions.” |
#20
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Do you think you could run it safely on straight pump gas?
The engine sounds amazing.
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1965 Pontiac GTO 455/469 w/ #48 Heads, '65 Tri-Power 9.25:1 CR Stump Puller Cam Muncie M22W 1st-2.56 2nd-1.75 3rd-1.37 4th-1.00 3.55 Rear Differential Front: 225/60R15 Height: 25.6" Rear: 275/60R15 Height: 28" |
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