another n/a project (page 2) :)

[CMF_frank2]

got some corsa pistons today, same 18mm wristpin and 1/2 a mm bigger bore than CGA
3mm less compression height tho block will need decking eh)

 

[CMF_frank2]

got the CGA block decked 100" thou, and bored +10" thou
he could,nt fit it to the machine with the lower chain cover on apparently, but i cant complain at £50 tho, so i,ll have to cut a slice off by hand eh (2.5mm step arrowed)
got some more 72.5mm corsa flat-top pistons too, pre 2005 x10 threepot engine i think, just need to shave another couple of thou off them for a snug fit
then i,ll gap all the rings with a file to 10 thou

 

[CMF_frank2]

hacksawed the slice off the cover, and filed it flat and true

 

[CMF_frank2]

and the used corsa rings only have about 5" thou of negative gap, so if i had got the block bored out to 72.5mm the ring gaps would have been a leaky 25" thou
where-as with the current 72.25mm rebore, it means i can gap them to a nice snug 10" thou

 

[CMF_frank2]

this was the jig used to hone the 10" thou off the pistons (with coarse, then fine grinding paste)
note the strategically placed wedge and clamp to give the desired taper

 

[CMF_Mickb]

So what are you trying to achieve with the Corsa gear mate?
Have you grafted larger valves into the micra head yet?

 

[CMF_frank2]

Mickb WROTE:

"So what are you trying to achieve with the Corsa gear mate?

Have you grafted larger valves into the micra head yet?

a high comp CGA to spank SSUK,s chequebook racer at the santapod showdown later this year mick
(£100 homebrew build ghetto daily driver vs ££££ build + quads + lsd)
the stock CGA pistons have a huge dish, and rings that are no longer availiable, the corsa pistons owe me nowt.
so with the flat-top pistons and weldfilled 2mm skimmed head, we should have 13:1+ c/r and 1360+ cc eh

 

[CMF_Mickb]

nice nice, should go well, use a good fuel!

 

[CMF_SSUK]

frank2 WROTE:

"Mickb WROTE:

"So what are you trying to achieve with the Corsa gear mate?

Have you grafted larger valves into the micra head yet?"</div>

a high comp CGA to spank SSUK,s chequebook racer at the santapod showdown later this year mick

(£100 homebrew build ghetto daily driver vs ££££ build + quads + lsd)

the stock CGA pistons have a huge dish, and rings that are no longer availiable, the corsa pistons owe me nowt.

so with the flat-top pistons and weldfilled 2mm skimmed head, we should have 13:1+ c/r and 1360+ cc eh

I keep hearing about this over on the UK forums lads and it's been a year of increasingly loud wining, now boiling down to money as the sole factor, (see above).

To cap it off there's been no "spanking" even based on an utterly uncompetitive time set on a bone stock CG13 with just an exhaust, set of cams and an ebay snagged set of throttlebodies bolted on, (very little effort).

All due credit to you Frank for what you're achieving but it's really getting boring hearing the same thing over and over....

 

[CMF_frank2]

heh, just spurring you on dave time will tell eh

 

[CMF_Mickb]

PM sent frank.

 

[CMF_SSUK]

Lol, that as it maybe but it's still old

Believe me, I do plenty of spurring on for myself. It's waay harder than I first assumed co-ordinating everything from overseas. I'd welcome back the good old days of having everything 60miles away so everything could be done myself, (which is why the chequebook remark is a little off base). You maybe surprised by how much work has actually been done on the car in house

Honestly though, I doubt there will be a showdown as such. I'm up for a grudge match as much as anyone but I prefer to attend the Peak Performance Test & Tune events. There's less riff raff and the turn out is 100% pure petrol heads, there's plenty of space to tinker & setup and you get WAY more runs compared to a RWYB day despite the higher sign-on costs.

Still on for May 7th shakedown trackday, will have a better idea on how far off we'll be in the next month or so I reckon....

 

[CMF_frank2]

maybe another year then mate
(after some more crazy ghetto experimentation, to quote a mutual friend)

 

[CMF_frank2]

dunno what the 2nd rings are made from, but i had to use the grinder to gap them
we,ve ended up with the crowns almost 1 mm short of the blockface, which will give a C/R of nearly 14:1 by my reckoning

 

[CMF_frank2]

thats if i use the weldfilled 2mm skimmed head, which has 18cc chambers
gonna need to fill with superunleaded before i fit this engine methinks

 

[CMF_frank2]

the lower chain was a tad too tight with the 2 links removed so had to shave a bit off the tensioner

 

[CMF_frank2]

did,nt need the valve cutouts/pockets really, even the 260/10 inlet cam has loads of V2P clearance, especially now that its nearly 20 deg retarded
gonna have a powerband like a 2 stroke i guess

 

[CMF_frank2]

installation this week they forcast above zero temperatures at last
in the meantme............ we,ve been assembling a couple of 1.3 high comp spare engines from my accumulation of left-over parts lol
the crank lapping has been mechanised shaved a few thou off the caps, then left it churning for 1/2 an hour with G3 cutting paste in all the journals, for that super snug fit

 

[CMF_Tinky]

Nice work Frank !! love the patented vibration dampening devices Secrets revealed...

 

[CMF_frank2]

ta tinky
we had a bit of a setback with the 1360 it started great, idled sweet and drove fine, but..................it smoked its bollocks off !
i left it idling for an hr +1/2 to try and bed the rings and to mark the bores for later diagnosis, then pulled it back out and fitted the 8.75:1 high boost engine (twas a long day lol)
the bores proved to be true and it was the arc of the rings that were 1" thou out (i,ve gapped 10" thou oversize rings on our kart engines for 10 + years without problems, maybe these were just too rigid ?)
so we,ve honed the rings into the bores, and the hand cranking compression has improved bigtime, the lovely 10" thou ring gaps are now 40 friggin thou tho *doh* (may as well have had the block bored to the stock 72.5mm !)
will refit soon, but i,m reluctant to pull this tubby engine out for some reason
got some later corsa 73.4mm z12 pistons too these have an annodised blue finish eh

 

[CMF_frank2]

been modding a toyota 4 into 1 inlet mani this week
you can see that the spacings are perfect, and the 4 inner boltholes just need re-drilling, (tab welding for the outer 4) and the t/b flange needs to come off to open it from 47 to 60mm, and widened a bit for the SR t/b, and injector sockets are needed too

 

[CMF_fuzzy-hair-man]

Lemme guess this is a 5EFHE ACIS manifold?

http://board.tercelonline.com/viewthread.php?action=printable&tid=23606

ACIS: http://en.wikipedia.org/wiki/Acoustic_Control_Induction_System
T-VIS: http://en.wikipedia.org/wiki/T-VIS

So how are you going to control the ACIS valves? the link suggests this is done via the ECU signal and you've still got the Nissan ECU so it's not going to do that.

Wonder if a tacho shift light set to the ~4200 they mention could be enough to trigger the ACIS to not power the solenoid so you get the 2 inlet runner lengths.

Of course it could be a completely different manifold or you may have gutted it and use the long or short runner length.

 

[CMF_fuzzy-hair-man]

Another link on how the ACIS thing can be got made to work without the 5EFHE ECU signal:
http://tercelreference.com/articles/acis_activation_options/acis_activation_options.html

 

[CMF_frank2]

nah, its just a nice flowing, equal length runner basic mani (it fits the exhaust too lol)

 

[CMF_fuzzy-hair-man]

And I got all excited and all....

Actually of the pictures that link has I confused his ordering, I was wondering how it achieved it using the pipes I was seeing.

Am I right in thinking it's a 4efe / 5efe manifold?

Looks like the ACIS manifold is pretty similar comparing the gaskets so an ACIS manifold on a CG might still be quite possible.

 

[CMF_frank2]

yes corolla 4efe i believe mate, and its nearly finished now
we,ve fashioned another fuel reg from a leftover dump/bypass valve thingy, and you can see that the fuel pressure nearly doubles when i pull the vacuum pipe off (and that in turn floods/stalls the engine)

 

[CMF_frank2]

we,ve done another cut-off CG maf so that its all 60mm+ throughout, and done a trial fit

 

[CMF_frank2]

just about fits lol

 

[CMF_frank2]

the shortened timing chain/decked block/corsa piston engine is back on track now, but with a 1275 crank this time (waaay too much c/r with the cga crank, and it sounded just like a diesel ).
so these newly acquired slightly dished pistons are about 1mm shy of the blockface now

 

[CMF_frank2]

we,ve also slotted the idlegear mount this time, with the 3mm blockskim and 2mm headskim and 2 link shorter chain, the lower chain is still a bit too tight (and the partworn upper chain slack) so this spreads the slack so that they are both a nice fit

 

[CMF_frank2]

and a random pic that stani took, of my current steed, on our way back from jae12

 

[CMF_frank2]

shortened chain corsa piston engine installed now A1 ringseal this time, crazy compression tho ! so that bode,s well for the lower comp 1367 tubby engine in the red car
close-up on the vid, showing the jointface and 3mm cut timing cover, and ebay h/g

 

[CMF_frank2]

the nistune board has sharpened the throttle response a tad, and you can hear the "close to det" diesel-esque engine sound from the 13:1 c/r eh

 

[CMF_Akinari]

@frank

how wide are those steel rims now since the machine work? if im not mistaken the stock width of the steelies are about 5inches.

im getting mine done aswell but dno up to what strech can the 165s go.

thnx

aki

 

[CMF_frank2]

6.5" aki, and 165,s should fit 7.5" no probs

 

[CMF_frank2]

we stripped the high comp corsa piston engine this week, to check its all ok inside.
and we,ve stretched the oil control ring expanders for a bit more sealage
its weird how the 2 compression rings just smear the oil onto the bore eh ?? yet the oil rings scrape it clean.
you have to stretch the expanders just the right amount, to little and they dont scrape fully, or too much and cant get the piston back in lol

 

[CMF_frank2]

been building another 1311 this time with 1 head gasket and the 1.0 pistons machined to clear the quenchsteps.
using what i thought was a CGA3 crank (with the 7th flywheel hole for the dowel) but it turned out to be a 1.3 crank !

 

[CMF_frank2]

so had to start again this week with a CGA3 crank (pistons now flush)

 

[CMF_frank2]

MOT day looms, so we,ve tried a different mani mod to run with a primary cat

 

[CMF_frank2]

pic2

 

[CMF_frank2]

pic3

 

[CMF_frank2]

been testing a 1.0 piston engine today, no flywheel or clutch (just a cvt backplate )

 

[CMF_frank2]

and been testing an unequal length runner manifold too