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General Category => Ask the Competition Committee => Topic started by: DRHaulsee on March 04, 2015, 07:20:36 PM



Title: Another Classing Question: 1976 Mercury Capri
Post by: DRHaulsee on March 04, 2015, 07:20:36 PM
I'm a newbie.  I took my Capri to the Dyno day and at this point I'm planning on Autocrossing this year.  I haven't a clue what class it will be in although I'm sure it will not be competitive wherever it goes.

The problem is its not exactly stock.

A stock 1976 Capri would have a 2.3 liter Ford LIMA 4 cylinder SOHC with 88 hp, 13"x 5.5"  wheels with 185/70 x 13 tires.

This car has:
2.3 4 cylinder Ford LIMA block (0.020" over bore) mated to a Volvo B234 DOHC cylinder head, Turbocharged and fuel injected (MegaSquirt), 5 speed transmission, 15 x 7 wheels running 225/45 x 15 tires, 20 mm front ARB, Bilstein front gas shocks, stiffer front coil springs, Fox Mustang 8.8 Traction Lok differential, stiffer rear springs, Koni red rear shocks, Tickford rear arb kit.  Track is unchanged.  No flares or modified bodywork.

I know it will be in some higher class but which one?  Classing won't upset me as I know its a really odd thing.


Title: Re: Another Classing Question: 1976 Mercury Capri
Post by: catapultkid on March 04, 2015, 07:59:09 PM
Gene Cooley has this stuff down. I thought, as you know when we talked, that C-Prepared would be an avenue but that clearly won't be the case as the heads can't be changed for a greater valve count.

Therefore I believe it will be E-Modified or X-Prepared. I'll need to review the rule book myself to know for sure but both are "high" classes as you can imagine.

-Paul


Title: Re: Another Classing Question: 1976 Mercury Capri
Post by: DRHaulsee on March 05, 2015, 03:26:11 PM
Thanks Paul.  I suspect it will be E-Modified but I'm not sure.


Title: Re: Another Classing Question: 1976 Mercury Capri
Post by: wahoo5 on March 05, 2015, 03:41:28 PM
XP is my guess, but Gene is the expert in Prepared/Modified.

David


Title: Re: Another Classing Question: 1976 Mercury Capri
Post by: bernard on March 07, 2015, 06:55:36 AM
I see a couple options,

XP with a 1,844 lb. minimum weight
SM with a 2,250 lb. minimum weight

But I'm not the expert.


Title: Re: Another Classing Question: 1976 Mercury Capri
Post by: GeneCooley on March 07, 2015, 08:01:47 AM
It should fit in X/P or E/M and be "legal" but where you want to end up is in S/M.  X/P and E/M are "full prep" race tire, stripped out, highly modified off road classes. 
The question here is whether the Volvo head can be used in S/M. A quick read of the rules say that only the block needs to be considered and you are using the original Ford block.  You should be good.
It's a good idea to read the rules carefully, we can class your car but you still need to have an understanding of the class.  It will save you lots of trouble later.   

Note:  I'm still looking for a Street Mod class "expert".

Gene Cooley


Title: Re: Another Classing Question: 1976 Mercury Capri
Post by: wahoo5 on March 07, 2015, 09:42:25 AM

Note:  I'm still looking for a Street Mod class "expert".

Gene Cooley

I just proved I am not it!

David


Title: Re: Another Classing Question: 1976 Mercury Capri
Post by: DRHaulsee on March 07, 2015, 01:07:30 PM
where you want to end up is in S/M. 
The question here is whether the Volvo head can be used in S/M. A quick read of the rules say that only the block needs to be considered and you are using the original Ford block.  You should be good.

Gene Cooley

Thanks Gene.  I had not even considered S/M.  I've read through the S/M rules quickly now and it seems a good fit.  I read the rules like you that it seems its the block that has to remain.  Everything else seems OK also.  I'll spend some time with the S/M rules to read everything carefully.


Title: Re: Another Classing Question: 1976 Mercury Capri
Post by: GeneCooley on March 07, 2015, 04:53:23 PM

Note:  I'm still looking for a Street Mod class "expert".

Gene Cooley

I just proved I am not it!

David

X/P would be a good choice if he wanted to go to slicks, especially since his engine of choice didn't require firewall mods to install it.  That's one of the big separators from E/M.

Gene Cooley


Title: Re: Another Classing Question: 1976 Mercury Capri
Post by: GeneCooley on March 07, 2015, 05:02:37 PM
where you want to end up is in S/M. 
The question here is whether the Volvo head can be used in S/M. A quick read of the rules say that only the block needs to be considered and you are using the original Ford block.  You should be good.

Gene Cooley

Thanks Gene.  I had not even considered S/M.  I've read through the S/M rules quickly now and it seems a good fit.  I read the rules like you that it seems its the block that has to remain.  Everything else seems OK also.  I'll spend some time with the S/M rules to read everything carefully.



I'll look forward to seeing it when you are ready to bring it out.  We can double check everything then.
Gene Cooley


Title: Re: Another Classing Question: 1976 Mercury Capri
Post by: DRHaulsee on March 08, 2015, 04:19:05 PM
I've been reviewing the rules.  I found this to be useful if it is accurate.
http://www.odr-scca.org/DIY-classing.htm

I only see one problem right now.

http://scca.cdn.racersites.com/prod/assets/2015-1-27%20section%2016%20street%20modified%20category%20online.pdf

Section 16.1 Item C

proportioning valves, etc., are unrestricted. Brake rotor/drum friction surfaces must be 100% ferrous metallic. Carbon or ceramic composite brake components (except pads) are expressly prohibited. Standard parts, per Section 12.4, are exempt from this restriction. A functional, redundant emergency (parking) brake must be present.


I don't have an emergency brake right now.  The emergency brake is a short term problem.  I will have to fabricate parts to connect the Fox ebrake to the Capri handle mechanism.  I put that off as I've always planned to go from the current drum brakes to rear disk and the parking brake cables are different.  It's $150 in cables I only want to buy once.

I have all the rear axle parts to go to Mustang SVO rear disk brakes.  Unfortunately the SVO calipers are missing the parking brake actuator arm.  I'm looking for that now.

The master cylinder(s) is a real issue as I run manual brakes.  I've always planned to move to a racing style double MC arrangement with a balance bar when I go to rear disk.  Drawings are actually at a laser cutting house now for all the MC mounting parts.  I expect delivery in about 2 weeks.

So, it's not going to make the first autocross.


Title: Re: Another Classing Question: 1976 Mercury Capri
Post by: GeneCooley on March 08, 2015, 07:16:04 PM
Not sure how we can handle the handbrake problem.  Since S/M is a street car (or in most cases a "streetable" car) there's a lot of road legal parts still required.  Any way that you can just hook up the parking brake safely without buying parts that you can't use later? 

I think that you are misreading the master cylinder rule.  You are not required to have a competition style dual master cylinder brake system.  Your car and all US spec cars built after a certain date in 1968 are required to have a dual (front/rear) braking system.  Most have a single master that is separated into 2 sections.  If one goes out the other half still functions.   Your car has (had?) this no matter if you have power or manual brakes.  We have a dual master--separate front and rear in a single master cylinder--in the Fiat. 

Bring it out on the 29th and let us have a look at it.

Gene Cooley


Title: Re: Another Classing Question: 1976 Mercury Capri
Post by: DRHaulsee on March 08, 2015, 07:57:24 PM
Gene,

I don't have cables that will attach to the FOX rear drum parking brake arrangement so it's not something I can cobble together cheaply.  I need the FOX drum cables and then I could probably do something to attach to the Capri pull.  Those cables are not compatible with the rear disk calipers.

I know I don't need a competition style dual MC setup for Street Modified.  The issue with the MC is that the dual piston, single bore MC I currently have (as you described) isn't going to work when I go to rear disk brakes.  I will need a different MC bore at that point.   The plan has always been for me to go to a competition style dual MC balance bar when I went to rear disk.  I have the MC's and the balance bar on the shelf.  The mounting parts are out at a laser cutter now.  The Capri MC is an odd thing and I'll have to do almost as much fabrication for a dual MC as to put a commonly available single bore, dual piston MC in.