[Zed.]

Aaaaaaaarrrgggh.

still cannot find the elusive 5.14:1 ratio BUT Bofi are selling.....

Paco Motorsports Ring and Pinion Differential Gearset 5.38:1 for Mazda MX-5 NA NB | BOFI Racing

Paco Motorsports Ring and Pinion Differential Gearset 5.38:1 for Mazda MX-5 NA NB. Mazda MX-5 performance parts & accessories from BOFI Racing. Transform your MX-5 into the ultimate street hero, track weapon or drift missile.

bofiracing.co.uk

and I'm tempted 😜


do I need it? unsure, I have a 4.778:1 but lower ratio suits my build (& I'm not brave enough for high speeds ).

do I want it? maybe

will see what happens.....

Rich.

 

[Zed.]

anyway, a slightly cheaper sidetrack...

back to the throttlebodies.

started fitting the airbox, it is an old SBDevelopments item and supplied undrilled so vaguely universal - obviously fits a Vauxhall XE but they're similar size to the Mazda engine.

the outside looks much nicer

to fit the velocity-stacks I needed to cut oversize holes but luckily there are flanges so easily mounted & sealed.

will bolt and use silicone to fix.

the flanges have captive nuts fitted so a few short m5 bolts & washers to secure.

will look something like this.

starting to look like its togther (2 bolts Positioning)

view down the throat.

the cover held in place (to photograph)

view down the intake.

the intake 'hole' is 5" so large enough to swallow small mamals etc.

a long intake tract, guessing the bonnet will need massaging slightly to clear (rofl)
also, my workshop needs tidying.

tomorrow I'l put the head / tb's back on the cylinderblock in the car and assess the clearance (or lack of?)

Rich.

 

[Zed.]

so......

thinking.....


(dangerous)

5.38:1 cwp, whats the difference between that and a 4.778:1

back to a post I made a while ago...

gearing calculations. | Mighty5s UK MX5 Forum

random bored Shitposting time, been playing with gearing calculators comparing different gearboxes (5 & 6 speed Mk1 & mk2) so thought

mighty5s.com

I'd previously worked-out standard Mazda diff / gearbox ratios using

Honda Transmission Calculator

Honda Transmission Calculator by Zealautowerks.

zealautowerks.com

with an 'average' 195/50/15 tyre size and 7,500rpm limit so had some ideas - including the 4.778:1 but curiosity got the better of me

so, guess that means 60mph @ about 4,000rpm 🤪

hummmmmmmmmm.

Rich.

 

[Zed.]

back to the tb's...

when I ordered the manifold this optional coolant manifold was also selected, both were made to order and shipped seperately so this was delivered today (like I'm in a rush!)

fits on the underside of the manifold, connects to the lower / waterpump inlet hose (as Vauxhalls standard design - not always used in car or builders preference)

better view...

the airbox mounted (look, no hands!)

arbox sits the same distance as the rear of the cylinderhead, important to remember when fitting the engine / making mounts.

tried to show the length compared to a cylinderhead - failed

also, I've another diff to build shortly so ordered a pair of diff pinion bearings (32307 £10.59 & 32206 £5.61 each posted) on ebay yesterday evening..

delivered this morning

Rich.

 

[Zed.]

anyway, diff pigshead & phosphoric acid update....

Yeuch🤮

Orrible & stinks....

looks better than lastnight?

the paint has been loosened and can see where I've scraped with a screwdriver to check through the scum...

rinsed in cold water, used a paintbrush to remove the gack...

suprisingly this pigshead isn't as rusted as some, have seen a few without raised letters and even the bolting counterbores rounded-off!

the ppf mount area.

looks to have a crack, probably c/o a mallet when splitting from the aluminium carrier case....

anyway, will degrease & re-wash in the PartswasherDishwasher.

Rich.

 

[boosted]

Dishwasher? I got caught doing that... didnt end well for me lol. Got the pointy finger.

Sent from my SM-G977B using Tapatalk

 

[Zed.]

after rinse and dried.

theres still a lot of dirt to remove...

unfortunately I'd missed a few bits of flakey-rust when chipping the cavities on the ppf mount so thats visable.


but must add....

Dishwasher? I got caught doing that... didnt end well for me lol. Got the pointy finger.

anyway....

after a quick run through the dishpartswasher 😜
in for a second rinse now then a session with smooth hammerite and a brush tomorrow

other busness,

I've removed the calipers from the silver car & these are the flexi-hoses

the Earls aluminium fittings are corroded and ready for the bin, luckily I'm making new lines for the car but it's something worth considering as a safety measure.

Rich.

 

[Zed.]

and...

out of the partswasher.

rust staining as it was a hot wash, easily removed with an oily rag but would need degreasing before painting.

bearing caps fitted, can see the difference in metals as the pigshead is cast iron and the caps are cast steel.

I'm thinking of replacig the bearing cap bolts, allen bolts are cheap and high-tensile (usually higher grade than hex-head bolts), size is 'M10 x 1.25mm pitch, 50mm long if anyone was wondering?

Rich.

 

[Zed.]

paint time.

also fitted the pinion bearing outer races, pressed in on the, erm, press 🤡

now awaiting delivery of the gears 🙃

other busness, rain stops play.

Rich.

 

[Zed.]

another coat on the pigshead, don't look any different

decided to tidy the workshop (slightly) & make a table / cabinet over & around the compressor (as opposed to just junk dumped on top of it!) work in progress BUT loads of stuff repositioned....

or moved on top of something else🙃

hopefully more tomorrow & if its not raining.........


Rich.

 

[Zed.]

so, had an email re. the cwp, will not be 'in stock' untill the 14th so guessing a few days to process & send to me....

another addition to the mix is an upgrade / larger bore tb's so the new jenvey 45mm tb's have been posted - 7 days after purchase, not bad considering that I bought them from a wellknown company's website (with good reputation!) showing stock & immediate dispatch

will be selling the 42mm jenvey tb's with their respectie cf trumpets, had considered fitting them on my white '90 Eunos but will try to keep that standard.

so not much to report otherwise...

Rich.

 

[Zed.]

I've bought a Longacre Gagelites Water Pressure Warning Light Kit.

Longacre Gagelites Water Pressure 40141

<p><strong>Light comes on if you have a sudden loss of coolant pressure.</strong></p> <ul> <li>Alerts you to a punctured radiator or burst hose</li> <li...

www.longacreracing.com

been thinking about adding on into the mix for a while and they're a great warning for coolant issues as the sensor illuminates a lamp if coolant pressure is less than ~3psi so can save an engine rebuild

and found a sensible priced set of steel conrods for the Vauxhall engine as the standard items are over 30 years old so hopefully an upgrade in safety and lighter, , also hopefully raise the revlimit slightly 🙃

Rich.

 

[Zed.]

minor update.

tried the airbox closer to the tb's, actually 3" closer and sorta touching them (well, sorta rested / by hand not bolted)

from above..

clears the Ohlins damper adjuster knob now

clearance is clearance?

and around the M/cylinders & reservoirs...

looks better for the bonnet?

well, if the inner-frame gets a little trim....

or maybe a 'power-bulge'?

so, the trumpets / velocity-stacks...

now protrude past the baseplate.

hummmmmmmmm....

M/cylinder clearance, thinking this is going to work.....

except.

I've got new tb's in the post and they are 28mm longer (what did I say about the damper-adjuster?)

anyway, more to follow....

Rich.

 

[Zed.]

more...

the 'short' and 'long' (90mm vs. 118mm long) Jenvy tb's, the butterfly is further from the engine on the longer tb's...

the 45mm tb's fitted to the manifold, I'll sort the fuel rail when I've bought injectors (pointless running used injectors as I've spent too much already)

the busness end, I have a set of 100mm long cf trumpets to fit but will look into mounting the airbox baseplate first...

more to follow.

Rich.

 

[Zed.]

so, delivery day 😲

43/8=?

43/8=5.375:1ratio

so, its landed, will I get time to build & setup on the weekend?

Rich.

 

[guitaristanime]

will I get time to build & setup on the weekend?

Nope don't be silly

 

[Zed.]

so...

test-fit & eyeball of the 45mm Jenvey throtlebodies on the manifold with the trumpets...

still considering injectors and their lengths - has a bearing on the fuel-rail position...

the noise department 🙃

cylinder clearance, somehow looks like theres more

because....

trying to upgrade ecu now, why do I do this???

Rich.

 

[Zed.]

had a few hours today, stripped the engine bolck, gearbox and diff from the silver car...

there wre more than a few bolts putting up a worthy fight 🤨
one of the ppf to diff bolts is not wanting to undo.

lifting the block with toorchlight.

typically my engine hoist hasn't a long enough reach...

without support of the ppf the gearbox floats a bit.

empty space!

I have a tubular front subframe to fit, will give a lot more room around the sump - but I'm using a drysump setup so no wories there

BUT...

it'll leave more room for the exhaust manifold so a masive plus🙃

I've removed the gusset between the bulkhead and chassis / innerwing to get a bit more space for the exhaust manifold...

this is a common 'mod' in USA where LS v8 & LFX v6 engines are fitted, the area is easily plated to add strength.

interestingly the chassis is not connected to the bulkhead - guessing for crash / impact absorbsion? will be plated over...

Tomorrow I'm hoping to assemble the 5.3:1 ratio & 3J Lsd then mesh it ready for use.

more to follow...

Rich.

 

[Zed.]

more faffin...

for the purists

Rich.

 

[Zed.]

anyway.

dropped in an empty Vauxhall cylinderblock and cylinderhead, used some wood to rest the sump-face on against the crossmember - not in a perfect position but a starting point.

trying to show bulkhead clearance....

exhaust side, plenty of room.

can see the 'old' Mazda enginemounts left in place, the Vauxhall XE 2L cylinderblock is about the same width as the Mazda B6 (1.6L) but the crankshaft is 'inside the block so looks taller, the wood is temporary but needs more adding to get the installed hight (as no sump fitted to the test cylinderblock!)

wooden engine packers, more needed.

sitting lower than the origonal engine, will be raised ~1"

front view...

sorta central?

more to follow (like diff stuff!)

Rich.