Motors Best ET...
Printed From: TheAMCForum.com
Category: Competition
Forum Name: Drag Racing
Forum Description: Your latest numbers, events you attended and more
URL: https://theamcforum.com/forum/forum_posts.asp?TID=112720
Printed Date: Apr/16/2024 at 1:54pm
Software Version: Web Wiz Forums 12.03 - http://www.webwizforums.com
Topic: Motors Best ET...
Posted By: Steve Obertanec
Subject: Motors Best ET...
Date Posted: Oct/09/2021 at 8:32pm
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So I figured I'd share my new personal best for my current motor. This motor was originally built as a Car Craft Magazine build but for a few reasons never happened. Motor Specs: 360 .030 over Wiseco flat tops Stock crank with K1 rods. Comp Hyd cam. .566 lift, .268 duration @ .050 Stock heads with Stainless valves. No port work. 950 Holley HP Alcohol carb Car Specs: 72 Gremlin 4.86 rear gear Powerglide 1:98 1st gear 5200 stall converter 28" slicks Best ET was around a 6.72 100mph. This year, the steel heads started leaking too much to leave alone so I swapped them with a set of Eddy heads & a new Victor Jr intake. I also swapped the gear back to a 4:10 for GAD so I could run 1/4 mile but that never happened so it wasn't until I swapped the heads that I got a 1/4 mile pass. I was surprised it went a 10.55 @ just under 125 mph. This got me thinking so I put the 4:86 back in & was even more pleased. My best pass with the new combo was 6.488 & best mph of 103.88!!! It was very consistent hanging at 6:48/6.50 & between 1.40/1.39 60'. Good enough to win a 9 round race @ the Dragway 42 Halloween race. I tried to do justice to all the companies who helped make this build possible. Make it as fast as I can without going deep into the motor. I think I succeeded in making that happen! ------------- Steve Obertanec www.stevandracing.com |
Replies:
Posted By: PHAT69AMX
Date Posted: Oct/12/2021 at 12:46am
So that equates to about a 10 seconds flat 1/4 mile time ? 
-------------  Link to a http://www.youtube.com/watch?v=MySiKQsmWxU" rel="nofollow - Short YouTube Burnout Video |
Posted By: Steve Obertanec
Date Posted: Oct/12/2021 at 8:41am
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I tried a couple of run completion apps & they say 10.20s. This combination would surely explode before it made it that far. 6800 in the 1/8 says I'm not allowed to go any further. ;-) ------------- Steve Obertanec www.stevandracing.com |
Posted By: WesternRed
Date Posted: Oct/12/2021 at 6:08pm
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That's a good gain, doing pretty well for relatively stock heads before. ------------- I've finally given up drinking for good...........now I only drink for evil. |
Posted By: Steve Obertanec
Date Posted: Oct/12/2021 at 7:46pm
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Over the years we have come up with a pretty solid combo that is dependable & fast. The K1 rods & Wiseco pistons have given us a solid bottom end. We have used this Comp cam a lot in the past & it never disappoints. I have always just built motors & tried to make them consistent for racing & not tried changing much to see gains. It was pretty fun changing things to see how much I could improve. I'm glad I started with the stock heads. It gave me a chance to have a baseline. Another improvement I made which helped more in consistency than all out speed is the addition of the Opentracker strut rod bushings. I have 1 more race this weekend & will give my reports back to John & hopefully have a direct fit part number for us by the end of the year! Couldn't figure out how to rotate. This is the first night out with the new set up & a set of new used tires.  ------------- Steve Obertanec www.stevandracing.com |
Posted By: amxdreamer
Date Posted: Oct/12/2021 at 10:22pm
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That's sounds like a fun little Gremlin! ------------- Tony Vancouver, BC 1970 AMX 1972 Badassador AMO#10333 |
Posted By: Hurst390
Date Posted: Oct/17/2021 at 12:21pm
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That's a great running 360! ------------- SC/Hurst Rambler 11.62 120 100% Street Legal |
Posted By: Steve Obertanec
Date Posted: Oct/19/2021 at 7:09pm
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Thanks for the compliments. I went to the Halloween Classic @ Norwalk this past week. The car was flawless. The only inconsistencies was due to extreme wind changes. The weather was between 3400' & 240' & the wind was either a 10mph headwind or a 10mph tail wind. Throw out the really windy passes & the car went between a 6.48 & 6.52 in 8 days of racing. I lost Sunday on a break out. I hit the brake but not enough. Broke out by .004. 60' 1.384 330' 4.111 1/8 6.46 @ 100.40 ------------- Steve Obertanec www.stevandracing.com |
Posted By: Ken_Parkman
Date Posted: Oct/20/2021 at 10:52am
| Terrific consistency! |
Posted By: Steve Obertanec
Date Posted: Oct/22/2021 at 6:38pm
------------- Steve Obertanec www.stevandracing.com |
Posted By: amxron
Date Posted: Oct/22/2021 at 8:36pm
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Looking good Steve!!! Still working on my AMX. Ron. ------------- AMXron Fleet/Jeep Mgr. Orbit AMC/Jeep 50-1787 |
Posted By: Steve Obertanec
Date Posted: Nov/08/2021 at 7:08pm
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A new best!!! We had a nice turn in the weather here in Northeast Ohio this past weekend. I was able to head to Dragway 42 to test a few things. I have been testing an intake modification in my intake. http://%20volcanomanifolds.com/" rel="nofollow - https://volcanomanifolds.com/ makes a plenum modification piece like a turtle that is easily interchangeable. I didn't have high hopes with track conditions due to a lot of street cars & breakage but was pleasantly surprised. Pass # 1 was a baseline pass with Short Volcano. Pass #2 is with tall volcano, all else the same as baseline pass. Pass #3 was the same as #2 but I footbraked it this pass leaving @ 3000rpm.   ------------- Steve Obertanec www.stevandracing.com |
Posted By: acm
Date Posted: Nov/08/2021 at 7:38pm
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Steve, Good to see that the intake and the volcano inserts are working for you. It's a great set up. ------------- acm |
Posted By: Steve Obertanec
Date Posted: Nov/08/2021 at 8:02pm
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I didn't want to put it on this motor but opportunity knocked & the intake was calling my name. Thank you for the exchange & getting me in contact with Heath. Great guy & beautiful workmanship. ------------- Steve Obertanec www.stevandracing.com |
Posted By: acm
Date Posted: Nov/08/2021 at 8:44pm
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You're very welcome. Heath is great to deal with and we'll make an AMC'er out of him yet!!! ------------- acm |
Posted By: WesternRed
Date Posted: Nov/09/2021 at 6:46am
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Great wheels up photo, nice times. ------------- I've finally given up drinking for good...........now I only drink for evil. |
Posted By: PHAT69AMX
Date Posted: Nov/09/2021 at 10:50pm
But does the car hook ?  ------------- Link to a http://www.youtube.com/watch?v=MySiKQsmWxU" rel="nofollow - Short YouTube Burnout Video |
Posted By: Steve Obertanec
Date Posted: Nov/10/2021 at 7:33pm
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Every time PHAT. I never question it. ------------- Steve Obertanec www.stevandracing.com |