Androo26

Ive had on my starlet for some time the Big brake kit from MRP in NewZealand. Great piece of kit bolting straight up with no mods required. I do track days as often as i can and have just put in a new set of Ferodo DS2500 pads to try out. This part number suits the 275mm rotor and Dynapro Caliper. Ferodo DS2500 part number is. FPR3149H. Check with your supplier for fitment.

Hi guys .... its been a while but i might just share some recent turbo action regarding the 4cm vs 6cm thing. So as you may have already read I had a 4cm TF035 exhaust housing machined out to fit a bone stock TD04L. On 19 psi this setup netted me a healthy 160kw at the wheels. After some time i felt that maybe there was some decent ( not in a good way ) back pressure happening due to the small rear housing. I built myself a device to measure it and see. After this I put the exhaust housing back to the stock TD04 6cm one. This netted an 18% reduction in manifold back pr

I got mine from a 99 Forester. From my research this may have been the only vehicle to come with the 4cm TF035. The others had 6cm TF035

I’ll just add my dyno graph here too . 4cm TDO4 19psi

As promised ive got out and done some testing on the new setup with great results. Swapping over to the stock TD04 6cm rear housing has seen a big drop in turbine back pressure over the 4cm unit I had been using. 18.75% reduction in back pressure. From 32psi down to 26psi Making the ratio now 1.33:1 as before it was 1.68:1 (Intake manifold saw 19-19.5psi) The difference in Boost/ RPM is as follows 4cm housing 5psi at 2700 10psi at 3150 15psi at 3700

Just a couple pics from last weekends turbine housing swap. With any luck I’ll be able to get som data logs done today . I also added a flex joint to the external gate recirculation pipe.

How good is that ! I never would have known. Thank you sir.

Yeah I think it is unfortunately, I had my entire build on there. Oh well I guess i can just share my stuff here instead.

Its been a long time , but ive got some further information to share. Since the last post Ive built a forged 1.3L 4E and still have the 4cm Turbine TD04L on board. This has made a best of 160.0 Kw at the wheels on 19 psi. Super fun to drive and traction is a problem even with a Quaife LSD. Long story short is im getting a bit more serious about lap times and also improving the efficiency of the turbo setup. So i decided to measure the turbine back pressure vs intake manifold pressure. Turns out its a bit high for my liking. 1.68:1 . Id much rather it around the 1.5:1 o

Well Ive got something a little different..... A 4cm TFO35 rear housing machined to fit a TD04. Good spool up with good flow. I also use a 35mm Turbosmart External gate. A fantastic compromise.

I would agree with what the other guys have said too. Read this article and you can make an educated decision for your self by testing it. Not just because others said too. ( hope this helps ) http://www.wallaceracing.com/plug-reading-lm.html

I dont have a BOV and mine make the best flutter ever !!

I had this on the dyno last week .. Whilst im not going to talk power figures I can tell you that Peak HP was at 5570rpm and peak torque at 4417rpm At 5600 boost dropped 1 psi so its possible that peak HP may have stayed flat peak till the end. RPM Range 4E 4cm TF/TD 4E 4cm TD04 5E 4cm TD04 2-3k 16 15 13 3-4k 11 11 10 4-5k 12 10 10 5-6k 15

Rightio then lads ive done some data logs on spool up with this 4CM TD04 hybrid im running. For those that dont know my setup its a rebuilt N/A 5EFE completely stock 9.5:1 comp. Turbosmart 38mm External waste gate. 4EFE Intake manifold. It runs a GFB Atom bleed valve (very basic) so this is about as slow/ linear to build boost as your going to get with no waste gate trickery at all. The run was performed in 3rd gear, foot flat to the floor from 2000 rpm till redline 6K 1 psi 2000 rpm 3 psi 2120 rpm 4 psi 2250 rpm 5 psi 2380 rpm 6 psi 2410 rpm 8 psi 2560 rpm I might

Rightio then lads ive done some data logs on spool up with this 4CM TD04 hybrid im running. For those that dont know my setup its a rebuilt N/A 5EFE completely stock 9.5:1 comp. Turbosmart 38mm External waste gate. 4EFE Intake manifold. It runs a GFB Atom bleed valve (very basic) so this is about as slow/ linear to build boost as your going to get with no waste gate trickery at all. The run was performed in 3rd gear, foot flat to the floor from 2000 rpm till redline 6K 1 psi 2000 rpm 3 psi 2120 rpm 4 psi 2250 rpm 5 psi 2380 rpm 6 psi 2410 rpm 8 psi 2560 rpm I might