Hi everyone,
Updated goal/plan/progress - 2019
1098 block bored +080 with flat top pistons
12G202 head modified by GR
RE266 cam
Crack checked + reground 1098 crank
4 synchro remote gearbox - standard ratio, 3.44 diff, pot joints, magic wand shifterI've recently picked up three engines that I'd like to pull apart and see how they work and rebuild one.
Attachment:
14014180633_6648791124_o.jpg
First engine is a 998 (99H34AJH) with a 12G295 head, 22G1832 rod change gearbox with pot joints
Second engine is a 998 (99H860AJH) with a 12G202 head, rod change gearbox with pot joints
Third engine is a 1098 (10YJUH) with a 12A1456 head, rod change gearbox with pot joints.
Currently the car has a 998 (9YATaH) with a 12A1456 head, remote gearbox and early rubber cross driveshafts, and front drum brakes. It is stock apart from an electronic distributor. It was last rebuilt in 1989 and still runs fine, but it won't last forever, and it's not particularly fast. I've also picked up a clean single HS4.
I've had a little experience with rebuilding an engine. I did a simple rebuild - rings, bearings, gaskets, clean up and paint - on a Mazda TC engine for my last car. It was single overhead cam and RWD, so a bit different in configuration to the mini one. There were essentially no aftermarket or performance options for it, so I'd like to do a few with the A-Series engines I've got now.
What I'd like at the end is a small block, 1098 crank, 12G295 head, remote gearbox, pot joints, and to do as much myself as I can. Seeing as the 1098 engine started life with 50hp at the crank, I'd be happy with 50hp at the wheels after the modifications (that's probably double what I've got now). I'd probably do some discs at around the same time.
A couple of questions at the moment:
1) If I went for the 1098 crank and some flat top pistons with the 295 head, what size should the combustion chamber need to be? I've tried to measure it with a syringe and ended up with about 28cc. This one looks to have been skimmed about 2mm and had the chambers opened up?
![Image](https://farm6.staticflickr.com/5114/13891314257_39354260a0_b.jpg)
(Before)
![Image](https://farm6.staticflickr.com/5194/14042809841_dc054135ce_b.jpg)
2) If I get a spare remote gearbox can I swap the pot joints over? I've also read that the gearsets can be swapped over, but the selectors need to stay with the remote?
Cheers, Tim