Mk1 Small Block Road Rally/Hillclimb Car

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01-09-10, 04:57 PM
mk1nova_rich

Quote:

Originally Posted by philip

be nice to see motor spec:D

Well im thinking of boring a 1300 out to take 12ST pistons to make a nice high compression 1396cc, then if necessary machine the pistons so that the CR is somewhere in the region of 10.5 - 11:1. Don't want to take it too high as i want the engine to be a nice compromise between performance and reliability/durability.

Then this is a rough sort of spec of what I'm going for:

Bottom end lighten and balance
Lightweight steel flywheel
ARPs
New oil and water pumps
New bearings/gaskets/bolts etc
Worked head
4 branch OR worked SR manifold and downpipe
Mk1 Astra inlet
Weber 34/32 carb
Cam to be decided

Your input and advice would be great :thumb:
01-09-10, 06:31 PM
matt_vaughan

Rich, you thought about using an 1.4/1.6 MPi head to bring compression down a bit? Cheaper and would also benefit from larger valves. Not sure how it would go down with regulations mind.
01-09-10, 11:30 PM
mk1nova_rich

Quote:

Originally Posted by matt_vaughan

Rich, you thought about using an 1.4/1.6 MPi head to bring compression down a bit? Cheaper and would also benefit from larger valves. Not sure how it would go down with regulations mind.

i think that may take the CR down too much Matt, and also brings issues of different port shapes and getting manifolds to suit. I don't think scrutineers pick up on stuff like that lol its probably permitted anyway... even if its not the hybrid 1400 wouldnt be either!
01-09-10, 11:33 PM
mk1nova_rich

As some of you may have seen i started an internal shift conversion but bypassing the Nova linkage and running direct to the gearbox with a custom linkage and lever. If not here is the thread for the first part of it

http://www.pngclub.com/forum/showthr...=153889&page=7

I will then carry on details and pictures of this in this build thread :thumb:
01-09-10, 11:39 PM
mk1nova_rich

http://i669.photobucket.com/albums/v...HoleOpened.jpg

I opened up the hole i had drilled in the bulkhead for the linkage to pass through, I had run out of jigsaw blades so did it pikey-style with a grinder and cutting disc lol this was done to try and straighten up the route of the shifter rod from the lever to the gearbox. I was also looking at clearance under the linkage as it is now and i think that i will be able to move it down around 15mm from where it is now to still clear the steering rack.

I get paid tomorrow so I am going to order the spherical bearings for the shifter box and bulkhead and also some alloy tube for the actual shifter rod. Decided on 20mm O/D which should be sturdy enough for the job and i will have no trouble getting the bearings for this size.
03-09-10, 08:43 PM
SR-Rally

Polycarbs are aloud in road rallying regs although your nav will hate you as will make his job harder! I fitted electric window for nav as we get through controls alot quicker without him messing about
03-09-10, 09:16 PM
mk1nova_rich

Quote:

Originally Posted by SR-Rally

Polycarbs are aloud in road rallying regs although your nav will hate you as will make his job harder! I fitted electric window for nav as we get through controls alot quicker without him messing about

Yeh just need to check about which class i would be in for hillclimbs and whether they are permitted for that. May just leave standard windows in for now and fit polycarbs when the car is up and running. Are you allowed to open the door at controls or not?
04-09-10, 02:13 PM
SR-Rally

yeah you can open the door just will loose few seconds as time it takes your nav plus all marshalls go straight to window and get in way of opening door lol
05-09-10, 10:00 AM
bazil

Quote:

Originally Posted by mk1nova_rich

I'm sure its the Mk2 Astra one that can be fitted underneath the beam if you weld a few brackets onto the beam...maybe a Cav one im thinking of, will need to investigate.

Off to do a bit more clearing out on that garage in Brighouse at the weekend, can't wait to get the shell moved in there for the winter :cool: least i will be able to get stuff done somewhere dry and fairly warm. Will try and get some pictures of it while i am there.

its a mk2 asrta gte one mate, ive had this done om my gsi, when i get the rear beam of ill get pics for you
08-09-10, 06:35 PM
mk1nova_rich

Quote:

Originally Posted by bazil

its a mk2 asrta gte one mate, ive had this done om my gsi, when i get the rear beam of ill get pics for you

cheers pal, that would be great :thumb:

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