The doo0T-mobile goes big-block...new ITB manifold design

[doo0T!doo0T!]

Torque on dynos is very hard to compare between dynos and cars, it depends completely on the box ratio, correction factor, tyre pressure, FD ratio, rod stroke ratio etc etc etc

The only way to compare, engine to engine or car to car is to measure flywheel torque which of course cant be done without an engine dyno.

I run a 4.25:1 final drive with Si close ratio 1-4 gears which makes 4th a lot lower than stock.

1st 3.250
2nd 1.944
3rd 1.346
4th 1.033
5th 0.750
FD 4.25

The cluster with the 4.25 FD is supposed to go like this;

1st 3.250
2nd 1.900
3rd 1.250
4th 0.909
5th 0.750

The run was done on a torque performance dyno which is the same type as my H22 just recently was measured on.
Different dynos will measure torque in different ways for instance a hub dyno measures direct axel torque. A roller dyno also has the radius of the wheel to factor in and the loss through the tires (which can be massive on a dual roller, not so massive on a single roller)

The dyno that LOFREQ was tested on for his 170wkw run with my turbo was done on a hub dyno and consequently his torque figure was 1012nm!!

Both these figures are torque at the wheels, not corrected for gearbox ratios etc etc to estimate torque at the crank.
A gearbox is effectivly a torque multiplier, for instance if you take drive friction out of the equation a 2:1 reduction gear will double your output torque. (this is not the case for power (KW) dont get it confused)

It should be as simple as dividing my end number by my FD and 4th gear but it isn't. That only gives 95 ft-lb which is 10ft-lb less than the stock NA engine!
We all know that's not the case.
There are too many instances of loss between the crank and the roller to estimate the torque at the crank so thats why everyone just goes with the figure at the wheels because at the end of the day thats the figure which matters because thats the figure that propells you.

I'd love to put the plot up but photobucket is being a c__t

[doo0T!doo0T!]

Ok here it is, the fluffy shit down the bottom was a missfire. It's sorted now.
Dont know what the flat spot that looks like vtec is.

[nzcivicracer]

Pretty impressive 8)

[Horny_Devil]

just for a comparison my stock D15B made 300Nm of torque on a torque performance dyno. and only 82wkw

good numbers though mike, when are u gonna rebuild it?

[doo0T!doo0T!]

just for a comparison my stock D15B made 300Nm of torque on a torque performance dyno. and only 82wkw

good numbers though mike, when are u gonna rebuild it?

The manifold?
This week. I'll just weld it up for now and scratch build another one before the next track day.
It'll be a better design next time with the collector lining up a bit better.

[mr.sky]

It should be as simple as dividing my end number by my FD and 4th gear but it isn't. That only gives 95 ft-lb which is 10ft-lb less than the stock NA engine!
We all know that's not the case.
There are too many instances of loss between the crank and the roller to estimate the torque at the crank so thats why everyone just goes with the figure at the wheels because at the end of the day thats the figure which matters because thats the figure that propells you.

Hmmm valid points dude and you can't really compare between dyno's. I always thought you could just divide it by the final drive like you said but I guess it doesnt work that way. My base run on the skyline was ~1750Nm which resulted in ~450nm at the wheels. Made sense with a final drive of 4.1. But then whats to say what kind of numbers it would pull somewhere else.

IRL strip/track racing = real measure of torque :-)

[doo0T!doo0T!]

Ok so a bit of an update, after a few months of feeling a bit negged out over my $400 per lap effort at NIMM I finally got inspired to do a bit of work on the old girl and get it back on deck.

The manifold has been welded up temporarily for now and seems to be working well with no signs of new cracking.
I had to replace the oil and water feed lines to the turbo as they got roasted to a crisp when the manifold blew out on the track.
The tube was rated to 700degrees and was supposedly fire proof but the manifold blew out enough heat to melt off the glass heat wrap which would be 1100degrees +

I was so lucky the oil line didn't blow it was charred to a crisp and crumbled in my hand.
I have now run the lines around the other side of the engine parrallel with the oil cooler lines so they are well away from the turbo and downpipe now. Much safer.

After spending and afternoon with Timmiblc getting it going again and wondering why it was getting so hot I realised that the fan was wired up backward. What a cock knocker.
I couldn't understand why one lap around the block was putting it at about 100degrees +, after a flip of the polarity on the fan and all of a sudden it's back on track again. Ha ha dumbass.

It flew through a WOF and REG at the testing station with only a failed taillight bulb for a re-check so now she's back on the road and I even drove it to work thismorning for a laugh.

I have built a jig off the current manifold to put the flanges in the correct locations and now I have to source some steam pipe bends and start again. This time I'll make the waste gate pipe come off at a better angle. It's still boost cutting from time to time and the boost cut is set to 16psi 8O

Engine seems to be strong as hell touch wood, it's now got 1200k's on it since I put it together, two Taupo race days with severe thrashings, two afternoons on the dyno and three major over heats and it doesn't seemed to have done it any harm. I'm now running Formula-R 10-60 fully syn (much to PRF's disdain I imagine but I've done my homework and I think it'll be well suited to this application)

The "get a wof" exhaust is the gheyness though and feels like it's holding it back quite alot, I think I'm going to go 3" straight through with the next one but I'll still keep the side exit for track days because it's the tits. (sorry to the dude who burned his leg on it at NIMM)

[Bananaman]

Nice, back from the dead mike.

You must be pretty happy to be back into this. It is only going to get better

[doo0T!doo0T!]

Took some pics today

[d16a7]

looking good... i always wished my damned insurance co would let me get a CRX all the way back in the day... cos they look soo damned good (or is it just me)

lovin the number plate placement cable ties? .. dw mines the same

[doo0T!doo0T!]

looking good... i always wished my damned insurance co would let me get a CRX all the way back in the day... cos they look soo damned good (or is it just me)

lovin the number plate placement cable ties? .. dw mines the same

Yeah the plate is genuinely hory. 1 bolt and a cable tie, got to ditch it though it blocks the oil cooler.

[Gargz]

Just to be picky prick - I recon orange/amber front corners would better suit the orange sides and back?

[doo0T!doo0T!]

Just to be picky prick - I recon orange/amber front corners would better suit the orange sides and back?

Yeah I'm thinking of ways around that, the corner lights are not indicators they are side lights but I guess I could go to clear side lights in the front bumper and orange indicators in the corners and swap the wires around.

[tonybennett_9]

dam taht thing has bin fully worked im doing a hybrid eg b18c turbo but did'nt clean up the engine bay like u have urs is dam tidy, im actualy haveing some issues with my setup, the wireing up of aftermarket control units, would u mind takeing a look at my thred. no1 seems to kwn or cant be bothered commenting lol

http://nzhondas.com/phpBB2/b18c-turb...-vtu78959.html

[doo0T!doo0T!]

Madness ZC part II begins soon....

I just located a set of 78mm endyn rollerwave forged pistons for a ZC for $250 US.
Fucking baller. Pistons for Honda dont come any better than this


Got a quote back from Darton for a set of closed deck MID sleeves to take the 78mm slugs and they want $575 for them. Or $1175 fitted not including postage.
Hmmmn, pretty $$$ I wish I had more money when Tompen had his up for sale Might have to nag G-FX who bought them


Got a crazy ported, de-shrouded and 5-angled head sitting here waiting for action.

A knife edged and lightened crank.

High volume oil pump.
And the very patient set of H-beam rods which have been shelved for years in anticipation.


I've also been planning my own dry sump kit too and i think I've got it pretty much sussed using an electric scavenger pump to evacuate the crank case, a sump collector box of my own design and plumbing which still enables the stock pump to be used to deliver the oil to the engine.

The turbo I have no idea about perhaps you can offer some insight?
http://nzhondas.com/phpBB2/viewtopic...=959278#959278

[nzcivicracer]

Rollerwaves for $250?!! That's gotta be the deal of the century! 8)
Good stuff man. You should PM that guy Liam (one of the Mods) on thezcr, he had a 400hp ZC that was built similar to what you've got planned, he certainly knew his stuff! I think his revved to 9,000rpm too :wink:
Ha, you might have to extend your cage through the fire wall to hang onto this thing

[G-FX]

$250?!?! damm!

also where did you get that pic of the sleeves? I dont have that little white box and it looks like the sleeves didnt have rust, when I dont mind they did

[nzcivicracer]

Found it, make that 500+whp 8O
http://www.thezcr.com/forums/showthread.php?t=18511

[doo0T!doo0T!]

Found it, make that 500+whp 8O
http://www.thezcr.com/forums/showthread.php?t=18511

Yep thats the sort of shit I'm aiming at

$250?!?! damm!

also where did you get that pic of the sleeves? I dont have that little white box and it looks like the sleeves didnt have rust, when I dont mind they did

They aint Tompens sleeves pictured, they belong to another mad bastard on d-series.org
And thats US$250, they have had 1000miles use in a car that was written off. Still a sweet deal and I'm all over it.

[xsiv]

thats gunna be a sweet setup good on u.
sleeved zc, gunna be mad power

[Ped Rac3r]

78mm 8O. This build just gets better and better

Any plans to upgrade the turbo?

EDIT: Nevermind, Just saw your other thread...

[doo0T!doo0T!]

Heres a small section of video from the tour in the weekend, (with sound this time) it's a bit of a full throttle squirt from 2nd to 3rd it gets up and flys thats for damn sure.

[CoupeTurbo]

nice car. atleast you have a limiter. im constantly trying be my own limiter.

[ep70_4efte]

saw this car on sunday at bp solar cars looking really nice man

[doo0T!doo0T!]

saw this car on sunday at bp solar cars looking really nice man

Was that you guys in the KP starlet infront of me when I pulled in?
Did you see that sexy farmer chick in the V8 land cruiser that parked next to me? Fuck she was hot, like a McClouds daughter or somthing.