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#21
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Lmao!!
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Darby 74 Grandville 2Dr 455 c.i 4550# 2011 1.60 60 ft,7.33@94.55-11.502@117.74 2017, 74 firebird -3600 lbs (all bests) 1.33 60 ft, 6.314@108.39 9.950@134.32 M/T 275/60 ET SS Drag Radial 2023,(Pontiac 505) 1.27 60 ft, 5.97@112.86, 9.48@139.31.... 275/60 Radial Pro's |
#22
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It was kinda funny.... I wanted to jump on the new combination through second gear to see how it felt. I came off the light heading West at Butterfield and Rt.59 as soon as I stabbed the throttle all Hell let use, I lifted instantly. A friend has a body shop right there and was standing by the over head door closing up the shop. I coasted into the shops driveway right up to the door he was standing at, smoking like crazy and peeing anti-freeze all over the place and said "hi Steve" like nothing was wrong.... If only I would've used 87 octane..... Or more compression!
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#23
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It seems like you may be calling some of us a liar???? |
#24
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Nah.... I learned something from this thread. 14.5:1 is a pump gas friendly compression ratio.
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#25
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My old 11.8:1 Pontiac was a car that i drove more than plenty...It made many 35-70 mile trips, all on cheap unleaded fuel...If I was building something to drive on trips, it wouldnt be those combinations...But, for toys, high compression pump gas cars have been around for many decades... I'm sorry that you blew yours up due to pump gas, which I will call BS on...You aint gonna break two rods due to some detonation...Try again. EDIT: I meant bend two rods... |
#26
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You can judge for yourself if the rods look bent... I won't be changing the details on my story as we go along.... Mine actually happened |
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#27
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“It takes considerable knowledge just to realize the extent of your own ignorance.” Dr. Thomas Sowell Last edited by hurryinhoosier62; 09-27-2023 at 08:49 PM. |
The Following User Says Thank You to hurryinhoosier62 For This Useful Post: | ||
#28
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The 496 was able to drive around and get goofy a little on pump gas...If he wanted to race it hard, I told him to put good fuel in it...That didnt mean that he couldnt enjoy it on pump gas though... I drove mine through every season that we have here in Kentucky...Sometimes it was the only thing that was running, and other times it sat while I drove other vehicles...It made the trip from Louisville to Indianapolis, ON PUMP GAS!!!!! So, if that doesnt clarify it enough for you, then oh well... As for my turbo combo...Its been at BES since last November...I'm running a friends nitrous car this season so i'm not rushing Tony on mine...The chassis is in line to get some sheet metal work done, then hopefully it'll progress over this winter... It really irks me when guys like you act like an engine with compression cant be driven on pump gas...We've done that stuff since the 80s, with dang near every brand of engine thats worth racing... As for your bent rods...Are you truly trying to say that the detonation bent those rods??? Or, did you lose a head gasket and hydraulic'd the engine??? |
#29
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If that 496 actually ran better on race gas then pump gas that means it was detonating. No way around that. The engine was being harmed.
A true pump gas engine will always run better with pump gas then race gas. There is more energy in 87 octane than 116 octane. The 116 just wont self ignite under pressure so you make more power, IF you have the compression to take advantage of it. |
#30
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I'm not sure how that helped the OP out one bit. It's not like he asked, how do I drive my 15:1 compression race car home from the track because someone stole my tow vehicle and all I have access to is 89 octane. When I was a kid (now this was back in the 80's) I had a 455 with 16 d-port heads on it. During the week I dropped the timing and ran 93 octane to drive it to work. Come the weekend I ran it on Av-gas and won a lot of races. I just don't think it's right to imply it ran fine on pump gas. Unless your idea of running fine is being down 70 horsepower from where the engine should be. Glad your making progress on the turbo project. Hopefully you figure out its octane requirements before you put your foot to the floor. Those turbo engines aren't very forgiving. Here's what happened with the bent rods. The engine detonated because it didn't have enough octane. That blew a head gasket and let water in two cylinders. Water doesn't compress so the rods were the weak link and bent. If the fuel had enough octane to prevent detonation, the head gasket would not of failed. The engine would most likely be running today with the same rods. Instead the short block is still together with the replacement rods running low eleven's in a Trans Am with a pump gas friendly compression ratio. |
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#31
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#32
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Idk about 14 to 1 but water meth injection can be a really good compensator . Here in CT we don’t have E85 anywhere. Don’t ask why , the answer is This state is stupid!
I run 12 to 1 w 100ll I wouldn’t run it on 93 octane that’s for sure. If was to try and get lower and lower if have a AFR gauge and I’d start blending 5 percent 93 then 10 percent etc . I’d creep up on the tune that way all white Monitoring AFR and I’d keep it fat and lazy while I did it. It’s so easy to burn a ring land or beat the bearings out of it.
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Happiness is just a turbocharger away! 960 HP @ 11 psi, 9.70 at 146. Iron heads, iron stock 2 bolt block , stock crank, 9 years haven't even changed a spark plug! selling turbos and turbo related parts since 2005! |
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#33
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I don't think he wants to slow down a couple tenths, lol.
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#34
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I see no benefit in running any engine that lights off well before TDC. Even if its a beefy brand X engine that can take more abuse.
I am a pump gas guy so the engine I just finished is 11.5 -1 CR and the plan is for it to run on all gas 92 we can get here. Right now I have 99 octane fuel in it. 2 gallons of 110 mixed with 3 gallons of 92. It seems to run great but the engine has less than 10 minutes on it. I went to put a timing light on it, set it at 29 total (High Ports) and let if fully warm up and run the valves. But had to go to work early. Once the engine settles in I will pull the 1050 off and put a 850 back on her and get a baseline ET-MPH with the 99 octane. Then try one gallon of 110 mixed with 4 gallons of 92 and that will get me 95.6 octane. If it runs the same or better I will try straight 92 and I will stay with it only if the car does not slow down. But I am not going to detonate this engine under any circumstance. See how much power I can make with a stock block and a 850. It should hold me to 650HP or so you would think. Kinda hard to blow up a nicely done stock block at that power level. Put the 1050 on .......maybe. Not sure yet. But hey, I know a guy who has a Ford with 14-1 and drives it on CA 91. I am not that brave. This stuff is too expensive to take chances on. |
#35
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As for your car...If you detonated enough to lose a head gasket and hydraulic the engine, you obviously wasnt very smart back then. |
#36
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#37
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For the record...The OP asked if he could drive his car to local cruises on 91 octane, and he also asked about trying to make 1 pass on the 91 octane fuel...NOWHERE in his post did he ask if he could run his fastest pass on pump gas...
My old junk ran mid 6.60s@3680lbs, and ran a 6.91 when I drove it down there and ran it on cheap pump gas...I wasnt trying to set a record, just show that it would do it... That was around 1994...The engine is freshly machined, sitting on the stand waiting to be put back together...If I ever put it back in something, i'll throw crap gas in it and drive it just about anywhere you'd like to go. |
#38
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That might be true but I've always been smart enough to keep my chit running over the years. Never had to sit on the sidelines with my "unit" in my hand fantasizing about things that never happened. |
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#39
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#40
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Lol…The not so bright new tanker truck driver filled the Road Diesel tank pumps at the local service station with gasoline a while back. So I guess quite a few of us around here have ran some turbo charged 16:1 engines on pump gas.
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