1967 Honda S800

[bozwell]

Nov 10, 2010 0:24:21 GMT waveman1500 said:

Why aren't you keeping it on fuel injection? Surely the stock S2000 injection system would have made more power with far better fuel economy than carbs.

modern cars are very finely tuned to exhausts etc and as i cant run a standard exhaust or manifold it would upset the running. it would need an aftermarket ecu or piggyback system that wont be cheap then i'll need to pay someone to set it up. thats after the nightmare of all the wiring and fuel system just to get it running. i figured it will be a lot less wiring (i'll just need a stand alone ignition system) and a lot less hassle just fitting carbs. i can tune carbs no problem plus they will sound nice as well

as for the vtec there are a few ways to do this. either the computerised ignition system will have an rpm take off for activating a relay or i could use a shift light to activate a relay or i could just use a thottle switch so it just comes in whenever at over half throttle. it's only a live feed needed to activate the vtec solonoid so pretty simple really.

many people think vtec will upset the carbs. i don't think it'll upset them enough to worry about. i'll just jet it to work . also there is nothing to say that carbs will knock power off. the thing that will upset power is runner length if iv'e got that wrong (easily adjusted with different trumpet lengths) carb size (but from what i read smaller chokes will help midrange) or if the exhaust manifold doesn't do it's job properly scavanging.

the book in this link is where i'm getting all my information from re inlet manifod design etc and the guy has done back to back carb and fuel injection testing with no difference in power output. fuel injection is better for drivability and smoothness so is usually favored but in my case i think the price of a new pair of carbs (with good discount) and the fact the inlet manifold will have only set me back about £120 i'm willing to take a chance and make it all work

;D

[bozwell]

Nov 10, 2010 12:12:11 GMT speedy88 said:

Nice work! Surely the table is a winter job though?

it's been a winter job for a few years now and it's still waiting i have got a huge slab of perspex for the table top. i'll get it done one day

I just wanted to add that I love this build!

cheers

[gettinjiggywidit]

Hi mate! gotta say i love this build. I have a civic eg and are fitting twin weber's to my d13b2 block. Looking at your mani it has really helped me get a better idea of what i need.

keep up the good work mate!

[uncle silvia]

WOW this this thing is amazing and it will go like hot snot with that lump in it!!

[bozwell]

just knocked this up from a bit of ally. it'll tidy up the manifold and make everything look straighter as the runners are at a bit of an angle.

[bozwell]

after hours and hours of header reaserch i can't make anything that'll be ideal and fit it in the small gap so i'm just going with gut instinct. hopefully it'll work, i.e. not knock too much power off. iv'e opted for 2inch primaries with an inline 4-1 collector. it's a little odd but all i can do in the room i have.









the last pipe needs blending in then i will have to make the collector that will need to incorperate the bend to go under the car. there will be a deflector in the collector to assist the last two to turn the corner into the exhaust system. odd but it's looking promising. the primaries are 12 inches long but with the pipes blended and not straight cut it should disperse the pulse waves rather than send them back up the primaries.

[carmad]

first time i have saw this excellent build

[anoldgit]

Hi Just found this site & nice to find a like minded guy on here straight away!
I would like to congratulate you for having the balls to Rod / Custom a quite valuable classic BRAVO to you & keep up the work, you know its gonna be a struggle at times & your enthusiasm will be hard to keep going but mate your playing a blinder at moment
Ive done this sort of thing all my life (I'm 61 now)
I now run a Bond Bug (Honda Fireblade engined) so simailar thing tiny lightweight etc
If every you want a chat about scary quick micro cars give me a bell (so to speak)
10 out of 10 pall CHEERS Gra

[DavidB]

If I did this, it'd be an absolute disaster. It looks amazing, and good luck with getting it completed.

[donttellhimpike]

superb mate , you are indeed a genius!

[bozwell]

cheers.


now the not so easy bit. iv'e got to remove the engine and gearbox then remove the body, then fit the engine and gearbox to the chassis so i can finish making the exhaust manifold and mod the chassis.

iv'e been pointed in the direction of one of these to control the ignition.

it looks absolutly perfect . it'll control the standard S2000 on plug coils as well as being able to control vtec but it has so much more as well. it'll control the fuel pumps, rad fan, it also has a shiftlight control, it'll feed the rev counter and should run off the standard S2000 crank sensor (although the trigger wheel may need changing) and so many other things i shouldn't need like traction control ;D . doesn't look too silly expencive either.

[Al Ramone]

ooh i like that bit of tech. i'd have as much fun playing with that as i would driving the car.
oh and nice to see some progress ;D

[bozwell]

had the inlet manifold plated for rust protection then a coat of paint so thats the inlet side finished

[sym0n]

oooh thats nice..... i really really like that!!!

[DiscoVolante]

what is better than weber 40 dcoe? two weber 40 dcoe.... ;D
very nice project, but I would stay with original engine...

[bozwell]

thought i'd make a start on modding the suspension. a standard S800 runs positive front camber so i want to change it to a little negative if possible.

as i have all the suspension off the spares car i may as well modify all that and leave the original set standard for now.







so i set about removing the ball joint and sandblasted the wishbone clean. it's a heavy item for it's size.



to give it some negative camber and to also make it more positively located i'm making some solid nylon bushes with the bolt hole offset from the centre. this will move the top wishbone in towards the car to give it some negative camber. it can then be fine tuned with the spacers they usually have behind the wishbone mounting bracket



i have also quickly modifid an old shockabsorber to see if it will fit closer to the ball joint on the lower arm. it'll make it more affective in that position. if it all clears ok then i'll get some coilovers made with rosejoints instead of rubber bushes. they'll need to be slightly shorter than standard.



this is the other side spare front suspension unit i have. ready for a strip down and modification







note how the shockabsorber is mounted. not the best position. so i mocked up that modded shock to see what clearence there is if the lower mount is moved out further





loads of room, even for a coil over. the shock will need to be slightly shorter and have a little more travel but custom shocks are easy enough to get made

the plan is also to modify the top shock mount to move it up slightly and further in toward the car to get more clearence from the modded top wishbone and to improve the angle even more



should help the handling no end





one done.

[79cord]

Very interesting.

[Al Ramone]

nice. very interested to see more on this, rear axle setup and brakes etc.
keep it up

[bozwell]

the rear axle is a 5 link set up from standard so it'll easily take a different axle. the Mazdat/Ford axle is 1 1/4 inches too wide otherwise i'll have taken that one back of the Datsun before i sold it.

i'll be using a Ford Atlas axle. i already have a LSD and various other bits and being a popular axle there are always bits available and will be for years to come.

as for the brakes i'll probably just use the standard set up for now with competition pads and possibly changing the calipers to Wilwoods or the such like. air cooling ducts can be mounted into the disc dirt shield. i plan to use 13inch wheels so can't go too big.

[bozwell]

made and fitted the nylon bushes for the lower arms



and checking the upper wishbones i felt the weak point will be where the bush outer sleves are fitted to the wishbone. they are only welded at the rear so there is only a thin sliver of metal about 1/4 inch each side holding it together. so i put in a couple more welds at the front of the sleve and welded a strip of metal in to give it some added strength




some bits will be plated and the others are already painted silver so any cracks that could appear are easier to spot.





special order shocks are being made