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74 Opel Manta

Posted by EvanB 
Pete
Pete Remner
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Re: 74 Opel Manta
January 28, 2015 01:58PM
Quote
Ascona73
I know of two such swaps. One turbo 2.0, one N/A 2.2. Both were a bitch, particularly the oil pan. Very tall engine, gotta notch the firewall too.

I prepped one oil pan for a friend's 2.2 swap, the other one got built from scratch (turbo version) by a shop and cost $1000 to build. I spent 8 hours fabricating/modifying and TIG welding the stock pan. It barely clears the rack and pinion.

http://flic.kr/p/ixTbW8

That's the impression that I got when I was poking around under the hood. Opel did not design the chassis well for engines from 40 years in the future...

So if you have to cut and notch and fab and stuff, go 13B winking smiley It's just as much work but you get big heaps of cheap power, probably build a super kick ass engine with the stuff lying around in the garage and small parts that would cost less than a pair of cams for anything you'd care to wedge under the hood.



Pete Remner
Cleveland, Ohio

1984 RX-7 (rallycross thing)
1978
Silence is golden, but duct tape is silver.



Edited 1 time(s). Last edit at 01/28/2015 02:03PM by Pete.
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Yellowhammer
John Barnett
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I really have one and use it.


Re: 74 Opel Manta
February 03, 2015 01:24PM
what are some options for a proper rally-use limited-slip, locker, welded, etc ....

+ , I want to keep the driveline as Opel as possible,
so I do not want a BMW rear-end or such frankenberry sheite going on, not on this car,
at this time

I also do not want to pay twice the price for a diff just because it says 'OPEL Motorsports Official Diff' or has der Fatherland number plate, or Hans Stuck spit on it or whatever..

I just want as much traction and 2wd going on as I can get for a reasonable price. I realize I'm not going to get this done for $99.99 but I'm not going to spend 1500 just for a diff either.


what say ye ? Kaaz? Tru-Trac ? Isuzu ?



Edited 1 time(s). Last edit at 02/03/2015 01:26PM by Yellowhammer.
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Ascona73
Bob Legere
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1971 Opel Ascona



Re: 74 Opel Manta
February 03, 2015 01:34PM
All the new Opel specific LSD's I've seen are $1300 or so. That includes Quaife, ZF, and Gripper. If you look on eBay.de you can find OEM LSD's from Manta B's (typically 25% or 40% locking) but they can be rebuilt and upgraded. Most common in the street cars were the ones to fit 3.44 gears. If you go numerically higher gearing there was a different flange thickness differential, but a 4 mm ring gear spacer will do the trick for less $$.

Lincoln locker works for cheap but is a bit of a pain on tarmac.



Opel is a 4-letter word...
http://www.flickr.com/photos/10498579@N07/sets/
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Yellowhammer
John Barnett
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Re: 74 Opel Manta
February 03, 2015 03:31PM
ok, have you personally (or anyone else) used something from the " ~ $1300 crowd" you listed ?


I have never heard of Lincoln- I will look at that.

I am ( maybe Even too ? ) building (gathering bits) for my Manta A to be period correctish stage rally car... so a little of everything.

I want : much more suited to gravel/dirt/rallycross, but transit stages .. ,
throwing on slicks or sticky rubber for a hillclimb or trackday,
or the occasional local autocross-shakedown/testing..
* doesn't require 12 hours of swapping things around under the car..

I'm exxagerating but I thinka yu katcha me drifta


cheers
JB



Edited 1 time(s). Last edit at 02/03/2015 03:32PM by Yellowhammer.
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Yellowhammer
John Barnett
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Re: 74 Opel Manta
February 03, 2015 03:34PM
something sorta kinda like here maybe/ish ?

<bad link, lemme find a better one> edit

or where ?



I will buy from somebody more rally-ish as a vendor if I'm getting a rep or dealer.



Edited 2 time(s). Last edit at 02/03/2015 03:38PM by Yellowhammer.
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Ascona73
Bob Legere
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Re: 74 Opel Manta
February 03, 2015 03:44PM
Quote
Yellowhammer
ok, have you personally (or anyone else) used something from the " ~ $1300 crowd" you listed ?

I have a Quaife for a street car. Not known to be good for gravel. A few friends of mine road race with the Quaife as well.

I've used plenty of ZF's in road racing and roundy-round racing as well as street. Everything from 25% up to 80% locking. 80% ZF in a street car is a pretty dedicated understeerer unless you set up up correctly. But it's got bite.

I've never tried the Gripper but a friend of mine has one in his GT. He's making 150-ish HP so he needs it. Especially with the GT's crappy rear bite (worse geometry than the Manta).


Quote

I have never heard of Lincoln- I will look at that.

Lol...Lincoln-locker is a welded differential. I have a ton of experience running a welded diff in circle track Opels, as well as road race and hillclimb Opels. Takes some setup work to make 'em turn but it's consistent and cheap.

My prefered method lately is to just weld in a 1/4" plate on either side of the spider gears. Easier than trying to weld hardened steel to cast iron. I just use stainless filler rod. I've done a lot of these over the past couple of years for local shop that builds drift cars. No weld failures to date.

welded diff



Opel is a 4-letter word...
http://www.flickr.com/photos/10498579@N07/sets/



Edited 1 time(s). Last edit at 02/03/2015 04:25PM by Ascona73.
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Yellowhammer
John Barnett
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Re: 74 Opel Manta
February 03, 2015 03:52PM
http://www.jcwhitney.com/differentials-and-covers/lincoln-continental/c3661d1399j1s21.jcwx


http://www.offroaders.com/tech/Lincoln-Lockers-Fozzy-Locker.htm


I'm sure this has been discussed ad naseum on opelgt,com, but I just want 'the answer' lol.
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john vanlandingham
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Re: 74 Opel Manta
February 03, 2015 07:44PM
Quote
Yellowhammer



I have never heard of Lincoln- I will look at that.

I am ( maybe Even too ? ) building (gathering bits) for my Manta A to be period correctish stage rally car... so a little of everything.



cheers
JB

Lincoln locker is from:


In Sweden---where Opels ruled the roost for almost 20 years---before Volvo 240s took over---its called "ESAB diff"



In Rally-paradise aka Finland its Kempi diff




Now sorry but I have to ax whenever i see this weird "I want it to be period correct-ish"

But what period and for who?

I see this almost always from people who in malheursement have no idea what people were doing elsewhere in any time period much less 3040 years ago.. One dipshit Doctor--a gynecologist or proctologist was taking it on himself to write rules from his proposed SCCA Vintage class and throws this "period correct" stuff out (all the while neglecting to mention that his personal Datsun 510 had a 2.4 liter bottom end that wasn't made till 20 years after the car---probably a Republican judging from his one set of rules for everybody else and he's exempt)

But is it what a Gynocologist "thinks" was do-able back then---or a guy who cross references things like me and who knows guys who were active in development and moddiing rally cars back then where the sport is a mass sport?



John Vanlandingham
Sleezattle, WA, USA

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Yellowhammer
John Barnett
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Re: 74 Opel Manta
February 03, 2015 08:20PM
I like the ESAB-diff. that's funny. no sarcasm.
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Yellowhammer
John Barnett
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Re: 74 Opel Manta
February 03, 2015 08:34PM
You are right. I agree : it's us and THEM.... Those moth fuckers.

How dare anyone do anything to a rally car without consulting you, personally?

yeah...

lighten up.
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Yellowhammer
John Barnett
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Re: 74 Opel Manta
February 03, 2015 08:42PM
Quote
Ascona73
Quote
Yellowhammer
ok, have you personally (or anyone else) used something from the " ~ $1300 crowd" you listed ?

I have a Quaife for a street car. Not known to be good for gravel. A few friends of mine road race with the Quaife as well.

I've used plenty of ZF's in road racing and roundy-round racing as well as street. Everything from 25% up to 80% locking. 80% ZF in a street car is a pretty dedicated understeerer unless you set up up correctly. But it's got bite.

I've never tried the Gripper but a friend of mine has one in his GT. He's making 150-ish HP so he needs it. Especially with the GT's crappy rear bite (worse geometry than the Manta).


anyway, thank you Bob. I sincerely appreciate your advise.

I guess if you don't buy parts from someone, then you are not worthy of asking questions... I've bought and received nice Opel parts from Bob before for my build... Hell he even gave me some stuff because he took interest in my project when I respectfully asked for his help.


Evan, I hope you are getting all this great advise for your Manta and use it to the fullest..

pm me if you wish .. I feel unwelcome in this thread.





Quote

I have never heard of Lincoln- I will look at that.

Lol...Lincoln-locker is a welded differential. I have a ton of experience running a welded diff in circle track Opels, as well as road race and hillclimb Opels. Takes some setup work to make 'em turn but it's consistent and cheap.

My prefered method lately is to just weld in a 1/4" plate on either side of the spider gears. Easier than trying to weld hardened steel to cast iron. I just use stainless filler rod. I've done a lot of these over the past couple of years for local shop that builds drift cars. No weld failures to date.

welded diff
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john vanlandingham
John Vanlandingham
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Re: 74 Opel Manta
February 03, 2015 09:19PM
Quote
Yellowhammer
You are right. I agree : it's us and THEM.... Those moth fuckers.

How dare anyone do anything to a rally car without consulting you, personally?

yeah...

lighten up.

Lighten up?

No need to, all this is light.. You think anybody can take this shit seriously...

You lighten up.
There was a good point --period correct for WHO?

No jabs at you. It was what some people call "a question"..

All questions do not mean that somebody is attacking YOU, ever hear of the concept?
That was a question too...You recognise questions by the curleyque thing at the end that looks like this ?

You see in conversations people ask questions, that how they get to know people...
You are taking EVEYTHING as if it is a challenge---a dare and that everything is DEBATE and you basically accuse me of "taking shit too serious"..

What the fuck?

You ever talk to people? How do you talk?



John Vanlandingham
Sleezattle, WA, USA

Vive le Prole-le-ralliat

www.rallyrace.net/jvab
CALL +1 206 431-9696
Remember! Pacific Standard Time
is 3 hours behind Eastern Standard Time.
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Yellowhammer
John Barnett
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Re: 74 Opel Manta
February 03, 2015 10:18PM
Sigh
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john vanlandingham
John Vanlandingham
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Re: 74 Opel Manta
February 03, 2015 10:45PM
Quote
Yellowhammer
Sigh

Yeah, sigh, I attempt dialog, I get flak..



John Vanlandingham
Sleezattle, WA, USA

Vive le Prole-le-ralliat

www.rallyrace.net/jvab
CALL +1 206 431-9696
Remember! Pacific Standard Time
is 3 hours behind Eastern Standard Time.
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Yellowhammer
John Barnett
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I really have one and use it.


Re: 74 Opel Manta
February 04, 2015 12:21AM
oh you poor marter,

All you want to do is give your humble advise as a public service. You're right, I was mean to you. My apologies m'amm.
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