Project A20 and B20 Begins

[rjudgey]

Finally i can start work on my engines i have the second prototype inlet manifold for Webers or ITB's which is good enough to use on the engines to see what kind of performance i can get from a Weber setup on either, the 3rd one i'm looking at will have the angle of the engine for the inlet manifold put into the pipes or maybe at the inlet port flange side not sure which will be best yet theres pros and cons to whether the angle is at the carb/ITB end and at the inlet port end. Didn't seem to bother my ET1 engine too much.



This made 200bhp with stock size valves and very shorth runners the angle was at the carb end as well on this one which has added benefit of better low throttle response as the butterfly it's tilting down towards the inlet port quicker.



Made from stainless steel original was mild steel seemed heavier the original prototype and obviously went rusty quickly although it could be painted as it stay's cold from being on the inlet side.



Different angles of the new Stainless steel version



Water cut flanges which are really accurate fit the pipe to flange fit is pretty spot on not much matching and port work needed which is just as well being Stainless steel which is really hard to work on.



The vac pipe take off is underneath to keep it looking clean on top, the whole thing could be professionally polished and would look really sweet with a nice set of ITB's the bore spacing is exactly 90mm between each runner so slide ITB's or Roller ones could be used without a problem, maximum weber size would be DCOE 45's.

[shepherd79]

what did you do to the head to flow better?

[MessyHonda]

looks nice

[smufguy]

Your setup looks awesome. I see that you blocked off the injector hole on the flange. Looks very nice.

PS: I like pictures more the merrier.

[PearlDrummer00]

damn...very shagadelic

[shepherd79]

Your setup looks awesome. I see that you blocked off the injector hole on the flange. Looks very nice.
PS: I like pictures more the merrier.

injector wholes? where do you see them? he is running webers.

[2ndGenGuy]

Its so beautiful.... brings tears to my eyes...

[A20A1]

Mouse pads make good head stands


I like the stainless one... if I had my way I'd stainless all the parts I could in the engine... just for the look not really careing about the added weights.

[EricW]

injector wholes? where do you see them? he is running webers.

He was taking about the small humps at the top of the intake ports on the head, not actual holes for injectors. The flange has 4 semi circle pieces sticking up above each runner.

[A20A1]

Yeah but that is supposed to be there, the humps are also on the stock carb manifold.

[smufguy]

injector wholes? where do you see them? he is running webers.

I am comparing the stock efi headflange to the one he got, i forgot how the carb manifolds look esp on the head flange

[carotman]

Hmmm Pretty!

Thinking about selling some manifolds?

[rjudgey]

They just copied the gasket i gave them, the injector plates didn't need to be there really as i've had them welded up but hey ho not to worry, he had two flanges cut so thinking what to do with the second one maybe try shorter runners or was thinking maybe making up a custom Plenum with a big bore TB now that could be interesting or actually some bike carbs yeah now were talking hmmm we'll see just want to get at least one of the cars back on the road over the next few months in time for some summer fun on the track!! Then second one as wuick as possible so that i can run round the drag and track with two of them out as Team Old school Honda thats been the goal for me for the last couple of years!!

[bobafett]

Wow man those are some beautiful manifolds!
Thanks for the pics...

[rjudgey]

Can e-mail you the full res ones if you want?
It's come out pretty good, the original one i had made from steel looks awefull in comparison functional but not great and looked crap!! But this one is pretty good very nice shape so very functional and looks pretty too!!
Only one slight snag just went to line up the webers and the studs are couple of mm out so i'll have to get hime to weld them shut and re tap them again so yet more delay to project A20/B20!!! Well waited a year for this so a couple more weeks won't kill me just would have been nice to have it to play with while i'm off work with a driving ban!! Ho hum!!

[Vanilla Sky]

so, do you have a spare manifold or two? i'd love to get my hands on one.

[rjudgey]

I have a spare prototype mild steel one can be used but looks pretty crap comapred to the SS steel one, i have a spare SS steel flange so is possible to get another one made reasonably quickly but the cost is quite high especially with shipping and U.K. pound doing so well against the dollar.

[Vanilla Sky]

what would the mild steel one cost? i'm not concerned about looks. i'm really only wanting something to get my DCOEs mounted up. i can paint it up to make it look real nice.

since carot asked first, he has dibs.

[SQ is the SQUAD]

i was told to always use mild steel for the flanges cuz the stainless will warp under the heat from the weld. no matter how tight you have it bolted down

[A20A1]

Is that only for a header though? intake manifold is different.

[Versanick]

that looks like immaculate conception.

[rjudgey]

Thanks, The flange isn't warped and even if it did you can allways have is skimmed flat again after, the bolts would squash it flat anyways as well. Can't wait to try it out don't know whether i should replace the pgmfi system on my B20A now with webers!!

[Vanilla Sky]

i've always read that carbs have the potential to make more power than EFI. i think i'd consider the swap if you can live with a car that isn't as streetable.

[shepherd79]

well, our B20a don't have Vtec and they should handle Webers a lot better. I say stick them on and see what it does.

[rjudgey]

They won't make as much power as say ITB's but not far behind but still a lot lot better than stock EFI and better than most aftermarket plenum style manifolds, although i'm sure someone will probably disagree. Pretty easy to convert a PPGMFI car to Weber DCOE's just need to change the fuel pump, add carb regulator redo the throttle cable probably still be able to use the original one and thats it the igntion system is seperate on A20 and Early B20 so would run without the ECU present. They wouldn't be that bad to drive you just have to get use to not mashign the throttle straight away from standing still once you get used to it there very driveable, they are just gloriously noisy and can make your car smell of petrol a bit but hey you get use to that!!