external wastegate / mr2

[fat-boy]

i got a 90 mr2 gt.

twin entry turbo.

has anyone fitted an external to a standard twin enty manifold b 4 ?

i was just concerned as 2 ports are seperate to the other 2 ports on the manifold and cause cause problems trying to plumb it up.

also how much boost can a 3sgte safly hold ?

cheer
tony

[Malcolm]

why do you need and external? I hope you're not just doing it for sound - screamers suck arse

[Akane]

Don't listen to All_fours, external owns.

And you have to mount the external right ontop of where all 4 of the channels joined if you want to have it "better"

[fat-boy]

because i can i was askin howto plumb it not for peopes opinions.

[fat-boy]

Don't listen to All_fours, external owns.

And you have to mount the external right ontop of where all 4 of the channels joined if you want to have it "better"

yea but the problem is they dnt join up. 2 chanels go to teh left entry and the other 2 chanels so to rite entry. hence teh twin entry turbo.
so wat shal i do ?
weld a tube on one chanel and a tube on the other chanel and join then together then into the wastey ?

[Adamal]

If you're going to be sticking with the CT26, then don't even bother. It'd be a waste of money to mod the standard extractors and you wouldn't get any gains. Boost controlling can be done on an internal wastegate anyway, if thats what you're thinking.

[fat-boy]

If you're going to be sticking with the CT26, then don't even bother. It'd be a waste of money to mod the standard extractors and you wouldn't get any gains. Boost controlling can be done on an internal wastegate anyway, if thats what you're thinking.

well i already have the external in the garage and just aquired a new mr2 so i thaught id put it to gud use.

[Adydas]

you could sell it on trade me? put the money towards something else, Electronic boost controller etc? Idea anyway.

Ill be using an external with the unit i picked up but thats as it dont come with a internal WG, just uses some kinda adapter plate between the manifold and the turbo.

To be honest if i could swap and use internal i would, so id back the sell it and get a wicked electronic boost controller instead.

[fivebob]

If you're going to be sticking with the CT26, then don't even bother. It'd be a waste of money to mod the standard extractors and you wouldn't get any gains. Boost controlling can be done on an internal wastegate anyway, if thats what you're thinking.

well i already have the external in the garage and just aquired a new mr2 so i thaught id put it to gud use.

But that's not a gud(sic) use for an external gate. It's a complete waste of time, effort and money... Oh wait you weren't looking for opinions, well sucks to be you then because you're going to get them

[Chickenman]

You should probably sell the MR2 before you ruin it... and buy a rotary.





Yeah, yeah. scratch one MR2 for Toby

[strx7]

ditch the CT26 on Trade-me and put a TD05H/TD06 MSE turbo on it with your external wastegate and fabricate up a new exhuast manifold

[Adydas]

what about some new cams and pistons while ya at it

[Akane]

plant it right ontop of where the 2 joins!

[GT4 20]

Come on lads, be nice to fat-boy. If he doesn't go through the pointless exercise of putting on an external wastegate, how can he brag about it to his mates
Gary

[vvega]

since none here aside from akane has attualy even tried to answer your question.......

technically you are suposte to have 2 externals
cuting and joining the trac'sof the manifold completely viods the whole idea or twinscroll

but yes if you only have one and do not care about this use a hole saw and get a bit of steam pipe welded in there with a TIG(you have to use tig)
you also have to decoke the underside of teh weld as as teh weldpool will petatrate if it touchs carbon it will absorb it and make teh weld(with cast iron) go crystaline(brittle) and porus(wont seal properly)

v

[vvega]

Don't listen to All_fours, external owns.

And you have to mount the external right ontop of where all 4 of the channels joined if you want to have it "better"

yea but the problem is they dnt join up. 2 chanels go to teh left entry and the other 2 chanels so to rite entry. hence teh twin entry turbo.
so wat shal i do ?
weld a tube on one chanel and a tube on the other chanel and join then together then into the wastey ?

no you cut a hole in the middle and grind out the center
thats what he ment by his post

[fat-boy]

Don't listen to All_fours, external owns.

And you have to mount the external right ontop of where all 4 of the channels joined if you want to have it "better"

yea but the problem is they dnt join up. 2 chanels go to teh left entry and the other 2 chanels so to rite entry. hence teh twin entry turbo.
so wat shal i do ?
weld a tube on one chanel and a tube on the other chanel and join then together then into the wastey ?

no you cut a hole in the middle and grind out the center
thats what he ment by his post

ohh cheers for that man now i get it now.

[Akane]

who cares anyway, cars suck.

[fat-boy]

who cares anyway, cars suck.

haha agreed.

[Ako]

The same issue happens with evo 4 onwards with their manifolds.

Method a few people use to avoid touching the manifold - port out the internal wastegate to as big as possible, remove the flapper totally, then have the external gate mounted right there, of the flange you'd bolt to your turbo. Means you make a new downpipe, but meh, thats a bonus anyway.

To the rest of you - no need to have a go at the guy. I'm one of those people who like the sound of an external, just like a stupidly loud BOV. So what if it doesn't have any real gains - neither does the widebody kit / big wheels / painted rocker cover you have.