Posted By: kj16v
16VT homebuild RR'd at last - 08/06/2010 00:12
Finally got my Coupe dyno'd
289.0 lbs/ft torque @ 3622 rpm @ 17 psi (1.17 bar)
261.2 bhp (225.5 ATW) @ 5794 rpm @ 16 psi (1.1 bar)
I 'coloured in' the dots for clarity. Ignore the AFR line, the dyno's lambda sensor spazzed out halfway through the run! The AFR is 11.3 all the way:
Mods to date are:
homebuilt T34 hybrid , 44 trim comp, 48 a/r turb
-31 actuator
Universal Intercoolers FMIC
FCCK2000 stainless tubular manifold
homebuilt 2.5" downpipe
full 2.5" exhaust system
(partly!) homebuilt 2.5" decat
Astra VXR 440cc injectors
FSE 1:1 FPR
255 lph fuel pump
Fully rebuilt engine
head with knife-edged port dividers, exhaust/inlet ports matched with manifolds
Fiat Tipo 16V inlet cam
Home-mapped using Tunerpro RT
Cost? Well, barring the engine build, honestly it's less than some people spend on a new turbo. Including the engine build? Less than some people would spend on an intercooler, and shiny pipes and dump valve to go with their new turbo!
I'm fairly happy with 260 bhp This particular spec turbo isn't really capable of doing more than about 270bhp. I mean, it is possible to wring alot more out of it but only by hammering the boost. Its obvious that the .48 turbine housing becomes an obstruction any higher.
I've spoken to several turbo builders and tuners and they've all said the T34 is capable of running 1.8 bar reliably, so who go higher? I don't like buying turbos every year.
TBH I don't care too much about peak bhp figures. What really care about is having a strong, rapid, driveable engine. The engine pulls right to the redline, and boost starts at 2500 and peaks around 3500. Boost hits the way I like it - [censored] quickly! Screw nice linear acceleration. I made that turbo and I want it to work for me goddammit!
Well I should be happy with having a fairly rapid road car with loads of real-world driveability. But it bugs me that the .48 turb housing strangles top-end power, hence the torque being "higher" than the bhp. I should just save my money and be happy - but I know me by now and I won't...
289.0 lbs/ft torque @ 3622 rpm @ 17 psi (1.17 bar)
261.2 bhp (225.5 ATW) @ 5794 rpm @ 16 psi (1.1 bar)
I 'coloured in' the dots for clarity. Ignore the AFR line, the dyno's lambda sensor spazzed out halfway through the run! The AFR is 11.3 all the way:
Mods to date are:
homebuilt T34 hybrid , 44 trim comp, 48 a/r turb
-31 actuator
Universal Intercoolers FMIC
FCCK2000 stainless tubular manifold
homebuilt 2.5" downpipe
full 2.5" exhaust system
(partly!) homebuilt 2.5" decat
Astra VXR 440cc injectors
FSE 1:1 FPR
255 lph fuel pump
Fully rebuilt engine
head with knife-edged port dividers, exhaust/inlet ports matched with manifolds
Fiat Tipo 16V inlet cam
Home-mapped using Tunerpro RT
Cost? Well, barring the engine build, honestly it's less than some people spend on a new turbo. Including the engine build? Less than some people would spend on an intercooler, and shiny pipes and dump valve to go with their new turbo!
I'm fairly happy with 260 bhp This particular spec turbo isn't really capable of doing more than about 270bhp. I mean, it is possible to wring alot more out of it but only by hammering the boost. Its obvious that the .48 turbine housing becomes an obstruction any higher.
I've spoken to several turbo builders and tuners and they've all said the T34 is capable of running 1.8 bar reliably, so who go higher? I don't like buying turbos every year.
TBH I don't care too much about peak bhp figures. What really care about is having a strong, rapid, driveable engine. The engine pulls right to the redline, and boost starts at 2500 and peaks around 3500. Boost hits the way I like it - [censored] quickly! Screw nice linear acceleration. I made that turbo and I want it to work for me goddammit!
Well I should be happy with having a fairly rapid road car with loads of real-world driveability. But it bugs me that the .48 turb housing strangles top-end power, hence the torque being "higher" than the bhp. I should just save my money and be happy - but I know me by now and I won't...