Half Bridge Turbo Suggestions

[AshRX]

i cant see how that is awfull lag:Hammer

sorry dude meant 4.6k :rollin

[antnicuk]

is that full boost at 4.6 or positive boost?  thats not too bad for full boost.

Get geoff to emai/fax you some power graphs of other bridges and see what turbo they run and the lag compared to yours.  Stert\'s car runs a T51 and seem very happy with it for hill climbs and that has over 500 rwhp.

[AshRX]

no thats positive boost not full boost. But the problem with my wastegate could have something to do with that as it was completly shot.

Might go for a larger rear housing and add a little lag but then be a bit safer on heat side of things.

All too bloody complicated lol

[shaunwil]

A-spec GT45r ? Link:

http://www.rx7club.com/showthread.php?t=673565

Shaun

[AshRX]

mmm nice turbo Shaun but think im gonna go for a GT4202R - exactly the same spec as a T51R SPL

[BlitzBoy]

So did you have a T51 KAI spec and now you moving to SPL spec?
How much did you find GT4202R?
yep constant excessive heat through high back pressure due to not having a big enough rear housing past 1.1 bar caused my last year failure of the apex seals to warp then chip eventually over time.
Basically the porting was too big and flowed too much for the rear exhaust housing to handle at high boost pressures, hopefully now I have the T51 it should cure it

[AshRX]

Yep moving from Kai to SPL with a large rear housing

Found it for £1200 + vat so not really a killer and includes v-bands top and bottom so will just go straight on to mine.

Think the engine is ok on mine, its a only a few tiny cracks on the back of the housing so will do until i get the new turbo

[BlitzBoy]

cool , coz i like the design of the v band manifolds, you got a link of where you found it?, might go bigger next year

[AshRX]

aet- turbos, turbo dynamics and Owen Developments all do it Mark

Just hope my old one holds up until i get the new one. Lucky its not the front fins and only the exhuast side

[BlitzBoy]

HKS used to on purpose clip the rear exhaust fins on the T04R and called it the cutback to reduce back pressure, I suppose you got the mod for free lol

[AshRX]

lol

Just need to measure up everything now. They actually do a 1.44 A.R, bit laggy me thinks lol so gonna settle for 1.15 or 1.28

[BlitzBoy]

ahh looked at thier websites, all they mantion is the T4 footprint nothing about v-band inlet to the turbine housing

[AshRX]

its extra - about £30 or so

You need to speak to them about it

[bnaellis]

Do you have an egt gauge fitted??


rgds
Brian

[AshRX]

I have now but car isnt running as its in the bodyshop at mo. So i wont know what temps im getting yet