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Skinners Sprint Micra
- Thread starter Skinner_87
- Start date
SuperUno
Buy & Sell Member
Got a link? Think i may need to replace this mount too...HardRace do K11 engine mounts for anyone interested
Shameless plug really
Unsure of individual availability/price but I can look into it for all interested
www.brightsparkracing.co.uk/parts-services/micra-parts-services/
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Skinner_87
Club Member
Putting the new bearings in the gearbox tonight and spotted something with the diff:
Gripper LSD Micra Race spec says 40/60 on the box re ramp angles but looking at the side of the diff I can see 40 on one side and 30 on the other.
Am I missing something or is it possible the wrong ramps are in there?
Gripper LSD Micra Race spec says 40/60 on the box re ramp angles but looking at the side of the diff I can see 40 on one side and 30 on the other.
Am I missing something or is it possible the wrong ramps are in there?
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Antony
Ex. Club Member
Silly question paul....
Is there any good reason why i cant do a reverse flow cylinder head on the cga3?
Mich like the old janspeed btcc primera.
So you can run throttle bodies with long runners out the bonnet without removing the brake booster and a straight enough exhaust routing out the back?
I know the exhaust valves would need to be increased in size and hardened (two lots of exhaust valves?) Also cams would be 180deg out... and lots of porting required. But i really cant see a downside.
Can you?
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Is there any good reason why i cant do a reverse flow cylinder head on the cga3?
Mich like the old janspeed btcc primera.
So you can run throttle bodies with long runners out the bonnet without removing the brake booster and a straight enough exhaust routing out the back?
I know the exhaust valves would need to be increased in size and hardened (two lots of exhaust valves?) Also cams would be 180deg out... and lots of porting required. But i really cant see a downside.
Can you?
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pollyp
Club Member
someone mis-labelled the box? so that's 30deg acc / 40deg dec (angle relative to the direction of rotation. lower the angle, more wedging ramp force acting on the LSD clutch stack, more locking force per torque input)
perhaps verify details with gripper?
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Skinner_87
Club Member
Yep all sorted with Gripper before it went in Paul
Im very happy with the diff but no power steering an Manx Roads makes for an interesting drive!
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Skinner_87
Club Member
That is way above me engineering ability or knowledge TBH Anthony but interesting though!
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Skinner_87
Club Member
Nearly prepped Matt.
New suspensions on im just playing with damping rates at the moment & tyre pressures. R888R's 185/60/14 are scrubbing in well & im impressed with the grip.
The LSD is taking some getting used to
its a bit of a hand full.I've hired a HANS device as well so im keen to see how that fits and get ready for scrut on Wed night or Thurs Morning
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Skinner_87
Club Member
This is worth a read fella.....
http://www.marklamond.co.uk/misc/scans/CCC_1999_Feb_Touring_Car_Engines.pdf
Interesting idea
I can't see why it wouldn't work, you'd have to swap the cams over and do a fair bit of porting. You would probably have to run a Standalone ECU and either ditch the cam sensor or relocate it.
pollyp
Club Member
lol I bet with no PAS the diff now tries to rip the steering wheel off ur hands exiting junctions/corners.Yep all sorted with Gripper before it went in Paul
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Skinner_87
Club Member
and in a straight line between gears haha all good fun though Paul
They're arm breakers without PAS. I very much like the AP Suretrac in comparison. It's essentially invisible until you're under power.
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Skinner_87
Club Member
I imagine the PAS will be going back on at some point Dave. I kept the rack & system from a spare car i broke last year just incase this sort of situation arose.
Either that or il have to mann up
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Skinner_87
Club Member
Il update the thread with the Hillclimb results when I get some pics sorted but the cars going on another diet for next year. Starting with a new alt bracket
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Antony
Ex. Club Member
Which alternator are you using? Suzuki swift ones are nice and small and light, I'm running one in my mini conversion and it's working fine so far.
There are various mounting arrangements so it may be possible to mount it using your new bracketry.
There are various mounting arrangements so it may be possible to mount it using your new bracketry.
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Skinner_87
Club Member
It popped up on EBay Matt. Thought why not
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Skinner_87
Club Member
£150 posted I thought wasn't too bad, I could t get one machined for that price
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Skinner_87
Club Member
It's not something I'd looked at to be honest, iv not weighed the factory one but they are weighty!
To be honest niether have I but the suzuki one is much smaller and in your hand it feels like it weighs a lot less, Brise make a light weight alternator that looks like a suzuki item.
I'll get you a weight for both as I have them both here somewhere.
I'll get you a weight for both as I have them both here somewhere.
pollyp
Club Member
that gives me the fizz
cooarr4.7kg for the micra alternator and 3.3 for the suzuki alternator if I remember rightly the suzuki one puts out less but it's running fine in my micra engined mini.
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Skinner_87
Club Member
It's been a good while since iv updated anything on here. Not much to report really, winter rebuild ahead and a lot of body bracing and welding vs cutting out the none structural parts.
Alloy rad to go in as well....
Engine wise I'm still undecided
Alloy rad to go in as well....
Engine wise I'm still undecided
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Skinner_87
Club Member
Bit of research and chat today about specing the car up. It's been untouched really bar the suspension and diff.
72.12mm bore forged pistons and rods to go into the CGA3 block.
A slight skin on the head as the bloc has 20thou removed already.
Aiming for 12.3:1 compression ratio.
An updated pump is sat in the garage and the injectors will go for a clean and test.
Also looking at options for a 200mm clutch or a beefier 180mm.
Engine to come out this month to be machines for the above. I can set to port matching the inlet mani to the head as well as that is standard shape at the moment.
Lots to do but I'm sure April will come around quickly
72.12mm bore forged pistons and rods to go into the CGA3 block.
A slight skin on the head as the bloc has 20thou removed already.
Aiming for 12.3:1 compression ratio.
An updated pump is sat in the garage and the injectors will go for a clean and test.
Also looking at options for a 200mm clutch or a beefier 180mm.
Engine to come out this month to be machines for the above. I can set to port matching the inlet mani to the head as well as that is standard shape at the moment.
Lots to do but I'm sure April will come around quickly
Very similar sized rad to what I'm using Paul. Ignore the slight angle, it was a WIP shot. Twin fans drop temps down much more efficiently and free up a good deal of extra room at the front of the bay for work in.
Will be interesting to see how much machining work is needed on the pistons. Design may have changed since I last looked but there's some additional meat on the crowns for setting the comp ratio.
Will be interesting to see how much machining work is needed on the pistons. Design may have changed since I last looked but there's some additional meat on the crowns for setting the comp ratio.
pollyp
Club Member
adding from my exp with high engine output,
the 180mm clutch had limited capacity and durability.
although my 200mm helix clutch can definately handle the torque reliably with durability, the PP is very!! heavy and long throw, which means the cable wears out faster and requires frequent oiling and maybe reinforcements.
another option would be like sirchris's multiplate clutches?
the 180mm clutch had limited capacity and durability.
although my 200mm helix clutch can definately handle the torque reliably with durability, the PP is very!! heavy and long throw, which means the cable wears out faster and requires frequent oiling and maybe reinforcements.
another option would be like sirchris's multiplate clutches?
Convert to hydraulic might be an option?
pollyp
Club Member
aye would luv to do that one day and be easier to drive in traffic jams.
Your clutch is crazy!
One press and I had cramp in my leg haha
pollyp
Club Member
lol tis a good work out driving it daily. just about the only sort of exercise I get these days
when I used to have the helix paddle clutch yrs ago and the cable was really sticking (this was before I found out about oiling the cable) the pedal was twice as heavy to push down so you can imagine how my leg was shaking during a long traffic jam going home (I almost couldn't drive it) and how the cable rivet eventually sheared off.
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Skinner_87
Club Member
One thing I have noticed Dave is that the fans on my rad are on the bumper side so I imagine they push hot air back into the bay? I need to power one up to test
Antony
Ex. Club Member
As the cga3 box is used in other nissans with hydro clutches. It shouldnt be that much of an issue.
Chris gets round the heavy pedal with an extended arm. Youd need to lengthen the lever on the pedal too to make the throw manageable.
Sent from my SM-G920F using Tapatalk
Chris gets round the heavy pedal with an extended arm. Youd need to lengthen the lever on the pedal too to make the throw manageable.
Sent from my SM-G920F using Tapatalk
Stock clutch, stock cable, 335kg clutch cover = fine
Modern cars are turning people soft
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Skinner_87
Club Member
Jesus iv not updated this or really touched the car in 5 month.
There's spacers and brakes to go on but it will be a press for time before April!
Porting the inlet mani / injector clean to do as well. A week of work should help
There's spacers and brakes to go on but it will be a press for time before April!
Porting the inlet mani / injector clean to do as well. A week of work should help
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pollyp
Club Member
next time we meet, you could try my clutch
pollyp
Club Member
same calipers as on daves there?Jesus iv not updated this or really touched the car in 5 month.
There's spacers and brakes to go on but it will be a press for time before April!
Porting the inlet mani / injector clean to do as well. A week of work should help
Yarp, different disc size though I'd imagine