T28 source?

[GT Josh]

Looking to get a bigger blower as my tomcat may well be dead after another couple k of boosting. Where's a good place to buy a turbo and what specs exactly do I need/want. Cheers amigos.

[GTphil]

The turbo that Turbo Ted mentions in this thread seems to be the ideal blower for a well speced c1j

http://www.rtoc.org/boards/showthread.php?t=30148

[gttjames]

yer but heard your talking close to 1k for that sort of turbo

[GT Josh]

Might be a grand but I want something big time lethal. My tomcat struggles around 20 psi.

[GTphil]

That is a lot of dosh for a blower, well out of my league anyways:ashamed:

However, really the power you can reliably extract from a c1j will always be relative to the fatness of ones wallet;) it can be done on the cheap but to do it properly you have to splash the cash in one way or another. Josh, your lump would make some good power with said blower, that's for sure;) your valve collets might not be to keen tho:wasntme:

[turbo ted]

yer but heard your talking close to 1k for that sort of turboclose to 1k:confused: supply your own t2 core and exhaust housing £750 tops

[Hi 5]

Just use a gt 28 r

[Hi 5]

I rebuilt James s engine this year and with a gt28 made 206bhp and 202 lbft at 18 psi of boost was only limited because of group a carb with standard carb rejeted and second stage etc would of made 225bhp at 22psi

[gttjames]

close to 1k:confused: supply your own t2 core and exhaust housing £750 tops

yes ted after reading your recomendations on turbo's i searched it up and prices people where telling me where close to 1k

[gtmatt]

I bought a damaged one and rebuilt it of here or ebay front wheel was the 60 trim one

[dangerous dave]

yes ted after reading your recomendations on turbo's i searched it up and prices people where telling me where close to 1k

I'm a glass half full kinda guy, when you say £750 I think feck me, that's almost a grand...

[gttjames]

I'm a glass half full kinda guy, when you say £750 I think feck me, that's almost a grand...
haha:laugh:

[Hi 5]

New price on gr28r is £700 to me roller bearing very good turbo

[philr5t]

New price on gr28r is £700 to me roller bearing very good turbo

What bhp can be achieved on one of these glen and when are they on full boost mate

Cheers mate
Phil

[Hi 5]

I made 300 bhp at 36 psi boost with out gas

[Scoff]

I made 300 bhp at 36 psi boost with out gas

Just to save confusion that was with a 28r. I think it hit full boost around 4600rpm or there abouts. The later gt30 was doing another 50hp with 43psi but maybe another 700rpm of lag.

[Hi 5]

Just to save confusion that was with a 28r. I think it hit full boost around 4600rpm or there abouts. The later gt30 was doing another 50hp with 43psi but maybe another 700rpm of lag.

Thanks god

[Scoff]

;)

[philr5t]

Would you know what size the compressor and turbine wheels are by any chance

Cheers
Phil :)

[Tutuur]

Just search for gt28r. It comes standard on a nissan s15

[Hi 5]

Would you know what size the compressor and turbine wheels are by any chance

Cheers
Phil :)

Just for you. Turbo Compressor Turbine
Turbo PN CHRA PN Ind Whl Dia(mm) Exd Whl Dia(mm) Trim A/R Whl Dia(mm) Trim A/R
707160-7 446179-54 44.60 60.10 55 0.42 53.90 62 0.64

[Tutuur]

Sorry, not just a gt28r. This one has a .42 comp cover for smaller displacement engines.

To clear some out: 53,9 exhaust and 60,10 inlet.
Looks a bit goofy to read.(although i'm confused now too)

[philr5t]

Just for you. Turbo Compressor Turbine
Turbo PN CHRA PN Ind Whl Dia(mm) Exd Whl Dia(mm) Trim A/R Whl Dia(mm) Trim A/R
707160-7 446179-54 44.60 60.10 55 0.42 53.90 62 0.64

F**k me looking at that lot I wish I'd never asked :laugh:

[Hi 5]

Sorry, not just a gt28r. This one has a .42 comp cover for smaller displacement engines.

To clear some out: 53,9 exhaust and 60,10 inlet.
Looks a bit goofy to read.(although i'm confused now too)

Go on turbobygarrett web. http://www.turbobygarrett.com/turbobygarrett/turbocharger

[GT Josh]

What kind of rpm will I hit full boost on a carb set up with this blower??

[Hi 5]

As scoff said 4700 but that was a .82 exh housing so .64 would be sooner

[soapymech]

I bought my gt28r from the bay thought I'd take the chance for £100. Fitted the turbo to another car last weekend and.... Boosts luvly with no smoke:smokin: can't wait to fit it to mine

[gttjames]

As scoff said 4700 but that was a .82 exh housing so .64 would be sooner
and could you go even smaller exhaust housing for less lag?

[Brigsy]

There is a .49 rear housing, not sure who sells it though.

[soapymech]

and could you go even smaller exhaust housing for less lag?

Yes you can go for a 47 or a 49AR it should give you full boost around the 3000 to 3500rpm mark. The turbo I'm using now is a t28 front with a t2 rear, pro's are no lag, con's are runs out of puff top end.

[GT Josh]

Cheers homies. Brigsy you can get a .49 but I think some machine work has to be done...

[Hi 5]

There is a .49 rear housing, not sure who sells it though.

Yes you can but would not make as much power josh is thinking long term efi 300 hp no chance with a .49But what do I know am only a painter

[Scoff]

Sorry, not just a gt28r. This one has a .42 comp cover for smaller displacement engines.

To clear some out: 53,9 exhaust and 60,10 inlet.
Looks a bit goofy to read.(although i'm confused now too)

The T28's that the tuners sold usually came with 0.42 cover, as you say, a bit better suited for smaller engines. The GT28R is 0.60. It'll work quite well with a C1J that can breath but if the engine is not that good then it might surge. I've seen 0.60's surge then swapping to 0.42 cures it.

[Hi 5]

The T28's that the tuners sold usually came with 0.42 cover, as you say, a bit better suited for smaller engines. The GT28R is 0.60. It'll work quite well with a C1J that can breath but if the engine is not that good then it might surge. I've seen 0.60's surge then swapping to 0.42 cures it.

:agree:

[GT Josh]

Boost surge isn't going to be a problem at 20 psi... I hope. In the future I hope to be going efi. Wastegate etc. just time. Turbo is a good starting point while I have the dosh!

[Scoff]

Boost surge isn't going to be a problem at 20 psi... I hope. In the future I hope to be going efi. Wastegate etc. just time. Turbo is a good starting point while I have the dosh!

Yeah shouldn't be. Going back a few years when I had a C1J I could run a standard BP285 with a 60trim front end with 0.60ar and it would surge pretty bad at 25psi, enough to make the boost gauge wobble at WOT. Swapping it for an 0.42 from a 4x4 cosworth fixed it. I dare say the cosworth cover will bolt right up to the GT28R if it came to it :)

[GT Josh]

Sound mate. Should be back over in the new year for fueling etc to be sorted with all the new toys.

[GTphil]

like I have said, whatever blower you choose it's going to be a compromise one way or another, I think going for a t2/t3 hybrid like turbo Ted had on his c1j is the best of both worlds.

however the 28rs will work well and give you the figures your after and we know your motor breaths very very well and continues to make power after 7k, and also your not shy at giving those kind of revs either:wasntme: looking at the state of the valve stem seals I would have said so anyways ;)

maybe try it with the larger a/r at first and of your not keen then look for a .49.

brigsy, how would you rate the 28rs against your old 60trim t28?

[Dave Reed]

Yes you can but would not make as much power josh is thinking long term efi 300 hp no chance with a .49But what do I know am only a painter

:coffee:

[jesus in the seat of a 5]

:coffee: .......:laugh: