TheAMCForum.com Homepage
Forum Home Forum Home > Competition > Drag Racing
  New Posts New Posts RSS Feed - Motors Best ET...
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

Click for TheAMCForum Rules / Click for PDF version of Forum Rules
Your donations help keep this valuable resource free and growing. Thank you.

Motors Best ET...

 Post Reply Post Reply Page  12>
Author
Message
Steve Obertanec View Drop Down
AMC Apprentice
AMC Apprentice


Joined: Nov/26/2012
Location: Lodi Ohio
Status: Offline
Points: 184
Post Options Post Options   Thanks (3) Thanks(3)   Quote Steve Obertanec Quote  Post ReplyReply Direct Link To This Post Topic: Motors Best ET...
    Posted: Oct/09/2021 at 8:32pm
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
Back to Top
PHAT69AMX View Drop Down
AMC Addicted
AMC Addicted
Avatar

Joined: Jul/07/2007
Location: West Virginia
Status: Offline
Points: 5475
Post Options Post Options   Thanks (0) Thanks(0)   Quote PHAT69AMX Quote  Post ReplyReply Direct Link To This Post Posted: Oct/12/2021 at 12:46am
So that equates to about a 10 seconds flat 1/4 mile time ? Shocked
Back to Top
Steve Obertanec View Drop Down
AMC Apprentice
AMC Apprentice


Joined: Nov/26/2012
Location: Lodi Ohio
Status: Offline
Points: 184
Post Options Post Options   Thanks (0) Thanks(0)   Quote Steve Obertanec Quote  Post ReplyReply Direct Link To This Post Posted: Oct/12/2021 at 8:41am
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
Back to Top
WesternRed View Drop Down
AMC Addicted
AMC Addicted
Avatar

Joined: Aug/03/2010
Location: Australia
Status: Offline
Points: 4904
Post Options Post Options   Thanks (0) Thanks(0)   Quote WesternRed Quote  Post ReplyReply Direct Link To This Post Posted: Oct/12/2021 at 6:08pm
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.
Back to Top
Steve Obertanec View Drop Down
AMC Apprentice
AMC Apprentice


Joined: Nov/26/2012
Location: Lodi Ohio
Status: Offline
Points: 184
Post Options Post Options   Thanks (0) Thanks(0)   Quote Steve Obertanec Quote  Post ReplyReply Direct Link To This Post Posted: Oct/12/2021 at 7:46pm
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
Back to Top
amxdreamer View Drop Down
AMC Addicted
AMC Addicted
Avatar

Joined: Jul/30/2008
Location: Vancouver, BC
Status: Offline
Points: 7992
Post Options Post Options   Thanks (0) Thanks(0)   Quote amxdreamer Quote  Post ReplyReply Direct Link To This Post Posted: Oct/12/2021 at 10:22pm
That's sounds like a fun little Gremlin!

Tony
Vancouver, BC
1970 AMX
1972 Ambassador
AMO#10333
Back to Top
Hurst390 View Drop Down
AMC Addicted
AMC Addicted
Avatar

Joined: Apr/20/2008
Location: secret
Status: Offline
Points: 4751
Post Options Post Options   Thanks (0) Thanks(0)   Quote Hurst390 Quote  Post ReplyReply Direct Link To This Post Posted: Oct/17/2021 at 12:21pm
That's a great running 360!
SC/Hurst Rambler

11.62 120

100% Street Legal
Back to Top
Steve Obertanec View Drop Down
AMC Apprentice
AMC Apprentice


Joined: Nov/26/2012
Location: Lodi Ohio
Status: Offline
Points: 184
Post Options Post Options   Thanks (0) Thanks(0)   Quote Steve Obertanec Quote  Post ReplyReply Direct Link To This Post Posted: Oct/19/2021 at 7:09pm
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
Back to Top
Ken_Parkman View Drop Down
AMC Addicted
AMC Addicted


Joined: Jun/04/2009
Location: Ontario
Status: Offline
Points: 1476
Post Options Post Options   Thanks (0) Thanks(0)   Quote Ken_Parkman Quote  Post ReplyReply Direct Link To This Post Posted: Oct/20/2021 at 10:52am
Terrific consistency!
Back to Top
Steve Obertanec View Drop Down
AMC Apprentice
AMC Apprentice


Joined: Nov/26/2012
Location: Lodi Ohio
Status: Offline
Points: 184
Post Options Post Options   Thanks (0) Thanks(0)   Quote Steve Obertanec Quote  Post ReplyReply Direct Link To This Post Posted: 14 hours 56 minutes ago at 6:38pm
Steve Obertanec
www.stevandracing.com
Back to Top
 Post Reply Post Reply Page  12>
  Share Topic   

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 12.03
Copyright ©2001-2019 Web Wiz Ltd.

This page was generated in 0.078 seconds.
All content of this site Copyright © 2018 TheAMCForum unless otherwise noted, all rights reserved.
PROBLEMS LOGGING IN or REGISTERING:
If you have problems logging in or registering, then please contact a Moderator or