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09-28-2015, 01:07 PM | #11 |
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Re: Peanut Port Drag Test
Looks good,, let us know how it goes. Whats the rest of the combo?
Danny Durham |
09-29-2015, 07:21 AM | #12 |
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Re: Peanut Port Drag Test
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09-29-2015, 12:38 PM | #13 |
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Re: Peanut Port Drag Test
I know very little about factory stuff, and less about big block factory stuff. I have an engine on the stand in the shop out of an 80's 3/4 ton truck that will eventually find a home in my wife's 55' F100 (don't start....i know). Just a street truck. How do you identify the factory heads? What's good and what is worthless?
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10-05-2015, 07:45 AM | #14 |
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Re: Peanut Port Drag Test
We raced Friday afternoon, Sat rain, Sun rain, so I really never got to dial the car in, I had a stumble on the launch which killed my 60-330, DA was 3253 on the best run, baro 27.80s. Never got to weigh the car because NHRA tech was to lazy to open the scale for me. The car hooked just fine but there was a stumble on the hit which I figured I had two more days to tune out but it rained both days. Timing was 35.5. Theres more there, just need more runs.
Runs in order: 1st pass, shut off 700 feet 660 6.746 1320 11.381 86.41 MPH 2nd pass shut off 1000 feet 660 6.719 1320 10.848 103.70 MPH 3rd pass run through though the 1320 on the rev limiter 660 6.726 1320 10.683 122.47 MPH Car number 5252 Last edited by HP HUNTER; 10-05-2015 at 07:51 AM. |
10-05-2015, 01:24 PM | #15 |
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Re: Peanut Port Drag Test
Not a bad start,, could hear the stumble, but sounded good on the gear changes. Maybe a squirter change is needed,, you've been around enough of them to figure out what it wants. Pretty good numbers, considering the moderate cam you're using. Seems like a little vibration going on there in the top end, but overall a good outing. I agree,, more laps will bring better numbers. Thanks for sharing.
We're in the process of sorting out my son's '69 Nova,,, like you, good numbers so far, with more to come. You can check it out on youtube also. Type in: Aaron Durham Nova. Take care. Danny Durham |
10-06-2015, 07:14 AM | #16 |
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Re: Peanut Port Drag Test
HP the car sounds and runs good. I have a couple questions about the cylinder heads.
What drew you to this style head? Vs a 049 style oval port? Did you have to replace the exhaust seats? Hardened? How much do you think you increased the volume when finished? Did you have to fill the intake manifold to match, or was it close? Do you think there would be any problem using this style head or the 90's version on a tow truck 496CI combination, and if so what cam and intake? Last is that Scott Welborns old car? Thank you and keep up the great work it really looks good. |
10-06-2015, 09:21 AM | #17 | |
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Re: Peanut Port Drag Test
Quote:
I was running out of 781 and 049 castings in my engine building buisiness. 2.Did you have to replace the exhaust seats? No, on muscle car builds I do not replace seats, but I'am a fanatic on round strait properly sized and finished valve guides which lets me make a very concentric seat with a extremely nice contact patch that transfers heat good due to the valve setting down on the seat perfect every time. Tow applications get a 1.750 CHE exhaust seat. 3.How much do you think you increased the volume when finished? I don't know I didn't check it, I machined, built, dyno tested, installed it in 7 days. 4. Did you have to fill the intake manifold to match, or was it close? No, I smoothed the plenum divider, the intake is not the cork. 5. I have built tow engines close to this, this engine would be good in my dualie, except the 9.3 comp would worry me along with the 1.880 exhaust valve size. I will put a link up to my 489 tow build along with a picture. http://speedtalk.com/forum/viewtopic...447590#p447590 6. Last is that Scott Welborns old car? Yes, I bought it from Dale Hulquist the BSer, when it arrived I realized it would need a total rebuild from front to back, and thats what it got. Last edited by HP HUNTER; 10-06-2015 at 09:35 AM. |
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10-08-2015, 07:26 AM | #18 |
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Re: Peanut Port Drag Test
HP thank you for the info. Speaking of the tow truck combination. Why would you use a different exhaust valve? Heat? Then what C.R. would you use for a truck? Lastly, do you know what other engines/trucks come with peanut style heads? 1990's? 80's etc? Sorry if I struck a cord about your car, it does look and run good.
Robert |
10-08-2015, 09:04 AM | #19 | |
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Re: Peanut Port Drag Test
Quote:
http://speedtalk.com/forum/viewtopic...447590#p447590 Last edited by HP HUNTER; 10-08-2015 at 09:07 AM. |
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10-20-2015, 08:40 AM | #20 |
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Re: Peanut Port Drag Test
HP thank you for the info. I did read the article in the link. But, I did see where there was possiably more info to the story (picts and all) that I did not have access to until I register. I have just not done that yet. But, thank you for the info. Again your car looks and runs really good. Have a good one.
Robert |
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