turbo carb setup?

[Sigmaproject]

Better factor in a custom built exhaust system, Cant buy one for a turbo off the shelf

[DragonCypher]

Good to see someone has some faith in me has any1 seen this

http://www.youtube.com/watch?v=L0sE-YMe ... re=channel

turbo using the original non turbo carby wonder if he made that manifold for it or jus bought it.

See theres an example of (almost) what I was planning to do.
Blow through carby, just replace the turbo with a twinscrew supercharger and the carby with twin webers.. however..

I notice you said earlier you were quoted $750 or something for NEW ready built to be boosted carb(s). What were they and what are they capable of?

Because I was thinking that rather than boosting the webers (as much as I love the sound) its better to get new purpose built carbs that can handle more than a couple 40DCOE's
And yes Luke, if the day comes you'll be the first person I offer them to

I tried to look up that website you listed but it didnt have a catalog or anything useful.. and noone seems to respond kindly when I ask for things quite so specific


Now for the minispool.. firstly, good luck as I dont believe they exist
secondly, if you find some.. please make copies

Cheers,
Chris

[SpEc_OpS]

Yes i was quoted 750 for a SU carby made to my liking by SUMidel download there pdf here

http://www.sumidel.com/webcat.pdf

That was all the jetting plus pressurising of the carb to withstand boost from a blow thru setup
i suggest u call them and talk to them they are quite helpful and should be able to sort u out

as for the mini spool i read somewhere that some1 has 1 i shall try and find the post again as ive decided LSD jus wont do for me.

Also jus found a ht18 turbo for $120 going to have a look at it now

[SpEc_OpS]

My new turbo




Any1 know what flange that is coming off the front of the turbo?

[Astron Boy]

Almost looks like my baby td04.... but its even more baby than that :S

[SpEc_OpS]

Almost looks like my baby td04.... but its even more baby than that :S

HAHA yeh shes small but for $100 im not complaining its just temporary i dnt wanna go to nuts with stock internals plus remember is gonna be turbo carb so cant have to much pressure running thru the carb

[Sigmaproject]

Well you cant use that carb on a suck thru, so blow thru it is ;)

[Astron Boy]

Think of the suck and blow as the air

So, blow through, is turbo before carb
Suck through is carb before turbo.

And yeah, Sigmaproject is right. blow through setup!

I'd still love to do my old plan of having a t18 supercharger with a blow through 48dcoe.
no lag, nice linear increase in power.

but most people go the turbo way.

I suppose with that small a turbo your lag wont be as bad, so long as your in the right gear.
even my small td04 gives me lag if I'm 1 gear off the correct rpm ratio

Smaller turbo is a td04 11b, you might have a 9b, it looks like a gto turbo, but doesnt have the correct side markings.

[Sigmaproject]

So what are the chances of getting that turbo to fit a Sigma turbo manifold ??

[Astron Boy]

Asking me?
Well, I dont know what the sigma turbo manifold is.
could be a weird design.
if it's the same as the US Starion manifold... which I kinda doubt, then no it wont fit.

Anyone with a spare sigma turbo manifold could measure... best way of finding out.

[stealth]

carby on turbo inlet - suck through
turbo boosting carby - blow through
whoops commented on wrong page
cheers stealth

[Sigmaproject]

Maybe I should have just said that there is no chance in hell that the turbo would fit a factory Sigma Turbo manifold.

[SpEc_OpS]

Maybe I should have just said that there is no chance in hell that the turbo would fit a factory Sigma Turbo manifold.

It wouldnt be any fun if it was easy i aint planning on using the standard turbo manifold anyway im jus going to mod the original. Has any1 ever heard of using the poles from a trampoline to make an exhaust? Theres a young guy i kno that has a mobile exhaust business who used to do it i think i might try it jus for the fun of it .

Its a ht18 (hitachi) i beleive its off rx7 from those photos can any1 tell me what down pipe would suit it? its really similar to the turbo off a rb25 and vg30 down pipe also the stock turbo on the nissan patrol. Im gonna go have a look around and try n find out myself but if any1 knows would be agreat help cheers

[Astron Boy]

Has any1 ever heard of using the poles from a trampoline to make an exhaust? Theres a young guy i kno that has a mobile exhaust business who used to do it i think i might try it jus for the fun of it

I've heard of not using them before................... :?

[Frosty]

VQ30 and RB26 but ran twin turbo.
so a single turbo from a VQ30DETT or a RB26DETT is designed to run a 1.3 or 1.5L engine at stock boost levels.

if you're planning to run a single turbo of that size on a 2.6 it will restrict the hell out of the engine. and possibly cook your turbo.

[Sigmaproject]

Matey boy, you cant just run around buying things without a clue what you are doing.

You nead a plan. The only plan you seem to have is that your will have it running this weekend.

[SpEc_OpS]

Matey boy, you cant just run around buying things without a clue what you are doing.

You nead a plan. The only plan you seem to have is that your will have it running this weekend.

Its already running and this turbo will be fine its neither of those has a SIMILAR bolt pattern but its actually off a 12a rotary and also used on nissan patrols which are 4.2l diesels being diesel they dont reach high revs so can use a small turbo. i need to get it carbon sealed and its good to go only thing im missing is a su carby i mite even use something else just make an adapter plate and run a down draught carby.

[Sigmaproject]

If you are going to go the blow thru option you dont need a carbon seal.

You only need a carbon seal for suck-thru.

At any rate you cant just fit a carbon seal. You need a carbon seal back plate and chances are they may never have produced one for your turbo.

[SpEc_OpS]

Well i was planning on going draw thru i had a look at a weber carby off a xf today from the looks off it its a straight bolt on so i mite stick that on and go blow thru. Only reason i was steering clear of blow thru is apparantly u gotta have the air/fuel ratio set for when the cars at maximum boost but running rich without boost. I have an idea to combat this but need an opinion.

Put a injector going into the intake manifold right before the carby which is connected to a vacum switch so it gets activated once the boost kicks in. This way i wont have to have the air fuel ratio rich when theres no boost jus have it normal and extra fuel will be added once the boost kicks in.

If not is there any other way to combat this problem?

[astronturbo77]

the basic rule i have found is that you need the mixture to be rich at full boost. As i have a relativly small turbo, i have to have large jets to keep the a/f ratio right as it comes on boost at about 1200rpm. i think i have 90 primary jets and 220 secondary jets, dont quote me on those but i just kept upping the gets untill it had enough fuel. personly i wouldnt go adding a injetcor into the manifold, as you would need over complicated switches and wiring and a efi pump etc. so for example if you had say standard primary and secondary jets with your turbo setup, the car would idle fine etc but as soon as the motor omes on boost it will be very lean, so if you run a bigger jet it will be say too rich at idle but when at peak boost will have the right a/f ratio. I also blew a headgasket when i first ran the engine because i was too excited and and it was too lean.

the best option with the weber carb is to put it inside a air box instead of using a top hat on the top of carby. using a box with carby inside equalises pressure on both sides of the carbies gaskets, throttle shafts etc.
You will also need to run a suitable efi fuel pump, and a malpassi rising rate, return style fuel pressure regulator phew.... thats a mouthful! a decent turbo cam, efi fuel hose. there are a few more things required also but im too tired to think of them lol.

[Sigmaproject]

All of this makes the stock system seem so simple

Just bolt on and go Hope any advantages are worth the trouble.

[Astron Boy]

It's easy to turbo a car.
It's a bit more complex to make that engine last.

You can have an EFI vehicle, strap a turbo to it, add an extra injector with controller, and safely run 8psi with all the benefits.
But in the end, that car was not designed for that application, and unless done 100% right, will destroy the engine.

Just be careful with this setup.
Unless you are only after a bit of fun with no long term plan...

[SpEc_OpS]

Well im not to fussed if the motor only last me a couple of weeks cos then i have an exceptional reason to rebuild it instead of spending money on various other projects ive got going. I think it should be ok as long as we get the a/f ratio right but the only thing is the injector will be at full power not pulsing. I found a link to a guy doing this and u guys thought i was dodgy LOL check this out hes using PVC plumbing pipe for his manifolds lol

http://www.toohighpsi.com/BudgetTT/tthowto.htm

[Sigmaproject]

Like to see you knock that up in a weekend ;)

[stealth]

TUFSIG ,yellow card for making to much sense
shame shame
i think he would rather spend $5000 getting nowhere ,gives him something
to complain about later lol
cheers stealth

[tandanus]

2 schools of thought here - do you learn from getting it right or do you learn from getting it wrong? Being basically lazy I prefer ignorance and getting it right. But then I want to know how it works and think I might have been better off getting it wrong a few times, AND maybe saving some money. In the end, mistakes=knowledge
T.
(PS jeez, I must be bloody bright by now )

[karl_2ltgc]

If there is a tried and true method for getting something right and you refuse to take it. YOUR A JERK.

You build a motor you talk to engine builders, you wanna bake some bread you talk to a baker, you wanna cook a lamb you ask a greek.

If your building a turbo sigma an dont want to take a similar path to all the forum users here, YOUR A JERK.

[SpEc_OpS]

On that note any1 wanna learn how to cook lamb im doing classes on thrusday there 2 more positions left.

You wanna suck my dick cos im only good at jerking it karl

[sigmare]

On that note any1 wanna learn how to cook lamb im doing classes on thrusday there 2 more positions left.

You wanna suck my dick cos im only good at jerking it karl

These sort of comments are inappropriate and offensive and will not help you get anywhere. Please try to show some respect to members here who not only have been here longer than you but also have a little more knowledge than you.

I really hate bringing these issues up but this is where problems start. So before things get out of hand and wish to continue using this forum to your advantage, it would be in your best interest to think about these issues.

And finally, i want to make a point to the minority out there who aren't following this "code". - YOU WILL FIND PEOPLE HERE THAT WONT LIKE YOUR IDEAS, TAKE IT LIKE A MAN !! Everyone is entitled to an opinion.

[SpEc_OpS]

So your saying cos hes been here longer, he has every right to call me a jerk for wanting to do something different?

Im treating immaturity with what he will understand IMMATURITY.

Just because something hasnt been done before doesnt mean it isnt possible karl and im sorry if im being offensive but last time i checked calling someone a jerk fit into the offensive category. So karl stick a v8 in ur car with nos and all that, its been done before you dont wanna be a jerk now do you?

I mean seriously its my car i can do what i want to it and that is turbo carby blow thru which has been done before so where did that come from karl? Stealth is doing a similar build to me you going to call him a jerk? I think it was a bad judgement call on karls behalf i beleive in treating people how they treat you. And im pretty sure you wouldnt like to be called a jerk karl just wondering would you have said that to my face? I dont think so.