First time out with new 412Reher Morrison looking for opinions

General engine tech -- Drag Racing to Circle Track

Moderator: Team

VegaJohn
Member
Member
Posts: 88
Joined: Mon Apr 13, 2015 12:18 am
Location: Central Alberta

First time out with new 412Reher Morrison looking for opinions

Postby VegaJohn » Mon Aug 21, 2017 10:56 pm

Got my Vega done finally and ran this past weekend. Car is 2660lbs with me.
Engine is a 412sbc Reher Morrison they were rated at 705hp
Powerglide with 1.76
5600rpm JW stall
4.88 gears in a 9" with 31x13 MT slicks brand new at 8.5psi
Car is ladder bar with stock front suspension. My best ET was 6.21@110.8
Our air is always around 4000-4800ft. Best 60 foot was 1.35 I have the timing set at 40, I tried 36 first. Jets are 84s all 4. Does this seem in the ballpark? I was expecting a bit better but I know the hill gets steep as you get deeper in the 6s. I'm going to try and get a dyno sheet from R/M and get a converter built for this engine.

bigjoe1
Show Guest
Show Guest
Posts: 6135
Joined: Thu Aug 24, 2006 7:16 pm
Location: santa ana calif-92703
Contact:

Re: First time out with new 412Reher Morrison looking for opinions

Postby bigjoe1 » Mon Aug 21, 2017 11:32 pm

With that rear end gear and big tires, you are not going to get good 1/8 mile times. If you are going to run at 1/8 mile tracks only, get a much lower rear end gear ( 5.57 or more ) and maybe even a 1.96 first gear ratio




JOE SHERMAN RACING

VegaJohn
Member
Member
Posts: 88
Joined: Mon Apr 13, 2015 12:18 am
Location: Central Alberta

Re: First time out with new 412Reher Morrison looking for opinions

Postby VegaJohn » Tue Aug 22, 2017 12:04 am

Thanks Joe. I was hoping to get your take on this. I was going to try some 5.42s or even 5.83s but I had lots telling me that I would have traction problems.

cgarb
Guru
Guru
Posts: 1266
Joined: Wed Jul 09, 2014 10:50 am
Location: Maryland

Re: First time out with new 412Reher Morrison looking for opinions

Postby cgarb » Tue Aug 22, 2017 12:06 am

I lost .04 in the 60ft going from a 1.89 to a 1.80 gear set when I broke my planetary 3 weeks ago. Got a loaner trans from a good friend to finish the year.

bigjoe1
Show Guest
Show Guest
Posts: 6135
Joined: Thu Aug 24, 2006 7:16 pm
Location: santa ana calif-92703
Contact:

Re: First time out with new 412Reher Morrison looking for opinions

Postby bigjoe1 » Tue Aug 22, 2017 1:28 am

We race a similar car at 1/8 mile only- 5.38 gears, 1.96 low, and 6800 stall converter-- We can only get a 28 X 10 slick under the car, but NO TRACTION problems at all- 1.26 60 foot- 5.57 at 125




JOE SHERMAN RACING

racear2865
Guru
Guru
Posts: 1320
Joined: Mon Sep 21, 2009 10:58 pm
Location: tenn

Re: First time out with new 412Reher Morrison looking for opinions

Postby racear2865 » Tue Aug 22, 2017 8:31 am

I have a customer with a Firebird with 4 link at 2890 lbs, dont know if with driver or not, has my 356 SBC with flat top pistons with heads angle milled to about 12 to 1. on E85. Has glide with 1.76 and 5200 stahl. Sunday made 7 runs from 6.16 to 6.21 with sixty foot at 1.31. Dont remember what gear. Goes thru at at or around 7000
reed

tenxal
Pro
Pro
Posts: 338
Joined: Sun Nov 17, 2013 8:48 pm

Re: First time out with new 412Reher Morrison looking for opinions

Postby tenxal » Tue Aug 22, 2017 8:55 am

VegaJohn, a steeper rear gear will actually make the car hook harder.

swampbuggy
Pro
Pro
Posts: 212
Joined: Mon Apr 04, 2011 7:54 pm
Location: central Florida

Re: First time out with new 412Reher Morrison looking for opinions

Postby swampbuggy » Wed Aug 23, 2017 10:09 pm

Tenxal, when you say steeper you mean lower (or) a BIGGER number correct ? just to make sure the fella knows what you are trying to say. Mark

cgarb
Guru
Guru
Posts: 1266
Joined: Wed Jul 09, 2014 10:50 am
Location: Maryland

Re: First time out with new 412Reher Morrison looking for opinions

Postby cgarb » Wed Aug 23, 2017 10:32 pm

Do you only run 1/8th mile?

VegaJohn
Member
Member
Posts: 88
Joined: Mon Apr 13, 2015 12:18 am
Location: Central Alberta

Re: First time out with new 412Reher Morrison looking for opinions

Postby VegaJohn » Thu Aug 24, 2017 12:01 am

Yes, this will be 1/8th use only. I will keep my 4.88 complete in case I decide to run nitrous or go 1/4 mile.

Steve.k
Pro
Pro
Posts: 261
Joined: Sat May 28, 2016 9:41 am

Re: First time out with new 412Reher Morrison looking for opinions

Postby Steve.k » Thu Aug 24, 2017 12:47 pm

:hello2: :hello2: vegajohn im thinking 2.75 open differential be big help. Lol. :lol:

cgarb
Guru
Guru
Posts: 1266
Joined: Wed Jul 09, 2014 10:50 am
Location: Maryland

Re: First time out with new 412Reher Morrison looking for opinions

Postby cgarb » Thu Aug 24, 2017 2:40 pm

maybe at Bonneville.

VegaJohn
Member
Member
Posts: 88
Joined: Mon Apr 13, 2015 12:18 am
Location: Central Alberta

Re: First time out with new 412Reher Morrison looking for opinions

Postby VegaJohn » Thu Aug 24, 2017 3:24 pm

Ford guys always looking out for us Chevy guys lol. With 2.75s I could just leave
It in first the whole 1/8th lol.

Steve.k
Pro
Pro
Posts: 261
Joined: Sat May 28, 2016 9:41 am

Re: First time out with new 412Reher Morrison looking for opinions

Postby Steve.k » Thu Aug 24, 2017 3:38 pm

Always eager to help john. Sides I've seen tail lights of that buggy a fair bit.

cgarb
Guru
Guru
Posts: 1266
Joined: Wed Jul 09, 2014 10:50 am
Location: Maryland

Re: First time out with new 412Reher Morrison looking for opinions

Postby cgarb » Thu Aug 24, 2017 3:40 pm

Sounds like steve needs a faster horse to pull his buggy.


Return to “Engine Tech”

Who is online

Users browsing this forum: 496notch, A-Sedan, BBCFAN, bigjoe1, ccm399, Curtis Mc, engineman1642, goldmember63, Google [Bot], jcisworthy and 39 guests