52mm+ TB and chip or ITB and Megasquirt or similar?

[Purtsi]

OK, the question is above. Have been thinking loads of different solutions on how to improve the engine on the intake side.

What I've read from teamswift and redlinegti forums, the nissan TB conversion seems to be quite easy and cheapish option. That mod would gain very much if the engine would be chipped but somehow I'm more keen on getting proper ECU instead of some chip. Are there actually any chips that work with mk1 engine??

The ITBs aren't that common, will be more expensive and will take some time to get working properly and the programmable ECU is mandatory. OK, I'd get loads of more air into engine with these, probably nicer sound and ITBs would look sooooo good 8) But would this mod be worth it considering that I won't be making a full race engine just a 'bit' faster than standard ;)

Anyhow, other mods what I've planned for the engine would include under drive pulley, probably lighter flywheel and a bit racier cams.

One thing to think about is also the huge fuel prices that seems to rise all the time :( I know that standard g13b engine doesn't consume much but how much have your fuel consumption suffered from all the tuning what you have done to engine?

[Purtsi]

hmm, were there too many questions as no-one has replied? :lol:

[miniswift]

Hi Purtsi,

I'm fitting Yamaha R1 carbs to my engine with suzuki Sports camshafts, under drive pulley, lightened flywheel without ECU.

I have been told that fitting 52mm TB to mk1 is not as effective as fitting to mk2 onwards cars with ECU.

I think best bet for to to get mk2 wiring loom with ECU to go with it.
There is no ECU for mk1 with chip at all in the world.
Only mk1 chip or ECU you can buy will be from Suzuki Sports and they finish making it 20 years ago.

You can get ECU with chipped for mk2 from Teamswift or Garndi on Suzuki4U(he is from Australia).

You can go with bike ITB and buy ECU for it.
They come with TPS and if you fit MAF sensor to mouth of airbox, you can still use it, I think. Or just buy R1 carbs like myself and use mk1 dizzy we have and mod advance curve.


Cheers
Atchi

[Purtsi]

Hi Atchi,

I was actually just browsing some really old topics from redlinegti and found the same thing about the mk1 chips and TB modifications. So I can forget that modification unless I want to change all the parts.

For me the bike ITB is more interesting choice than carbs as I want to enter the world of injected engines hehe =)

Now, regarding bike ITBs, which are the ones that can be used with least modification? Only Suzuki or are others OK too?

Thanks :)

[miniswift]

Hi Purtsi,

I think any bike ITB for 600cc and over.
It needs to be bigger than 36mm.
I think R1 is 38/40mm carbs and later on they are ITB with Injections.

G13B had Injectors in the cylinder head casting. So you can use bike injector holes for NOS...may be.

I saw Kawasaki does nice one.
Go to Teamswift and look for Madzuki.
He used to have web site with this mod on how to...almost.

Cheers
Atchi

[Purtsi]

Thanks Atchi,

Anyhow, wouldn't the bike injectors be better as those are usually rated for over 140bhp? or is it just easier to use swift injectors?

I did a search on teamswift but didn't find anything from 'madzuki' :(

edit: just rewording my questions...

[miniswift]

Hi Purtsi,

I tried and typw in madzuki in word search.
You will find some but backup of his web site is down, so you can't see it anyway.

There are 3 ways of doing this conversion anyway.

1. cut inlet manifold and use silicon tube or better still use original bike mounting rubber tube.

2. custom make one manifold

3. weld you head up and make inlet from billet aluminium and fit them to suite!

Here is mine!
http://www.16vminiclub.com/gallery/albums/userpics/DSCN0311_web.jpg

I was thinking of using Swift injectors due to already there with fuel rail and so on.
Also, you can fit other cars' injectors to get better fuel delivery from turbo or something...(teamswift has all of info for turbo application)

I think reading teamswift as well as Redlinegti will give you all the info you need.

Cheers
Atchi [/url]

[Purtsi]

Thanks for the info Atchi :)

Is that custom made manifold that you're using? Looks really good 8)

I have been browsing ebay (at work time of course :lol: ) and there are loads of gsxr750 and 1000 ITBs for sale. Maybe I try and get a bargain from there ;)

Yeah, teamswift and redlinegti forums sure have loads of information in them. need to keep browsing and perhaps register and ask stupid questions there :lol:

[miniswift]

Hi Purtsi,

My manifold is 4 indivdual manifold machined from a billet aluminium.
If you need 1 cut off manifold, let me know.
I think I have a spare.

Cheers
Atchi

[Purtsi]

Billet aluminium mmmmm 8)

If you have one spare, that would be sweet as it's really difficult to find one here in Finland. How much do you want for it? :)

Although I had an idea to ask from Pete if he's making more of those cast manifolds ;)

Cheers,
Purtsi

[miniswift]

Hi Purtsi,

When I lived in Gloucster, there was a recylcle place for Aluminium.
They had a scrap cylinderical block of it which I bought for £15. It was 10" diameter by 2ft in length. I gave it to my tuner to make inlet manifold with.

I have manifold which is cut up, so you just need to weld 4x tubes to take carbs/ITB.

Or ask Pete's Dad to make one for you I guess.

Cheers
Atchi

[Purtsi]

Hey,

you then got some nice amount of aluminium for a bargain price :)

Do you have any pictures of that manifold? I'd be interested to see where it has been cut up. Anyhow I believe I could make it work with gsxr throttle bodies (just need to buy them first :lol: )

Cheers,
Purtsi

[miniswift]

Hi Purtsi,

Sorry for the delay.

I have been busy as well as not well.
I have now found and took pic of mk2 inlet manifold which I cut it up.

http://www.16vminiclub.com/gallery/albums/userpics/mk2_inlet_cutoff.jpg

I hope this pic will help.

Cheers
Atchi

[Purtsi]

Hi Atchi,

no probs. Good to hear you're ok now :) Hmm.. those are cut quite short and I'm just wondering that how can I get those work best with gsxr TBs?? if I just connect those with siliconetube the end result will be horrible as the ports doesn't match even near. Any good ideas?

-Me :)

[miniswift]

Hi Purtsi,

What I have seen before is just cut off completely so that you make flange and weld tubes to it.
I sold the other one to Tempo who did R1 conversion with Boggs Brothers in York. He sent inlet flange and they weld tubes to make manifold.

I think it will be easier than making flange from scratch.
I did have CAD data for exhaust flange but not for inlet.
If you would like, I can make CAD data for you.

Cheers
Atchi

[Purtsi]

That was fast reply :)

I got few places where I could actually get the flange cut if I just provide the CAD drawing :) If it doesn't cause too much trouble for you to draw one, I'd be more than grateful for that 8)

Next thing is to find some 42mm metal tube that could be "easily" modified. Time to dig some metal scrap piles =)

-Purtsi

[miniswift]

Hi Purtsi,

I think I saw special tool that can make round tube to oval to match inlet manifold.
I think I saw it on Marcus post.
It was using a block of steel, screw and washer/flange.
It looked simple and very effective for shaping Ali pipes.

I will try to find inlet manifols gasket and draw one for you.
Do you want it in dwg format?

Cheers
Atchi

[Purtsi]

Hi Atchi,

the .dwg format is OK. I had an idea just to cut, weld, bent and hammer the tubes until those are in the right shape :lol: Also I probably need to make the manifold out of steel as I don't have equipment to weld aluminium.

Cheers,
Purtsi