Posted By: Saint
My 16vt on the RR, 630cc injectors & FC chip - 19/09/2009 05:07
Well after my last trip to the RR I found I had maxed out the flow of my standard 384cc injectors, at an indicated 250bhp (209wbhp) so decided a swap to 630cc was needed, I was really copying Vas and Nickd with doing this, and I knew Nickd had got his car mapped by flea, with a similar build to 305bhp, 290ft/lbs so there was a opportunity for a bit of distant mapping.
I have always used the same dyno, Dyno dyamics, from where after fitting a 3" exhaust, cams, FMIC, mitsi 16G compressor and evocars chip I made 180bhp at the wheels about a year ago.
On this trip it was on a t04e 50trim with still the .48 hotside and have added a tubular manifold. On this trip I made 243bhp at the wheels and 290ft/lbs of torque at 1.4bar. I have a SARD motorsport fuel pump which holds flow better than the Walbro at high boost and seems to have made fuelling was a bit rich -.
Max exhaust temp I saw on the dyno was 840c, and outside temp was around 21c
Power and torque
boost and fuel
I also tried running over 1.5bar on the 1.5map sensor the 16V has, my turbo will easily flow 1.5 bar to red line and I can now finally report that it does not work, it appears the ECU cuts the fuel to the engine when the MAP sensor goes out of range
fuel and boost over 1.5 bar
This particular dyno I would say requires a 20% addition for transmission loss so that puts the result around 300bhp, and torque near identical to NickDs, so the two 16V's on 630cc injectors have made very similar numbers mine through .2bar more boost and Nick has headwork (mine has none).
An intersting point is both Nick and I run the T3 .48a/r hotside (maybe the same as a .63 t28?), and our peak power is generally around 5500rpm, I feel pretty confident if I went to the .63a/r T3, power would be up quite a bit as I suspect it is choking the power at higher revs.
given that I am running standard rods and pistons though big revs over the factory red line of 6500rpm isn't likely the best idea.
Anyway a revised chip is on it way from Flea to correct the fueling and so a re-test will be coming soon.
So far a good move in the right direction, up 35bhp with the 630cc injectors as it gives the fuel needed for higher boost. As always Leighton's serice has been excellent and with a bit of tweaking a few more BHP should be released
I have always used the same dyno, Dyno dyamics, from where after fitting a 3" exhaust, cams, FMIC, mitsi 16G compressor and evocars chip I made 180bhp at the wheels about a year ago.
On this trip it was on a t04e 50trim with still the .48 hotside and have added a tubular manifold. On this trip I made 243bhp at the wheels and 290ft/lbs of torque at 1.4bar. I have a SARD motorsport fuel pump which holds flow better than the Walbro at high boost and seems to have made fuelling was a bit rich -.
Max exhaust temp I saw on the dyno was 840c, and outside temp was around 21c
Power and torque
boost and fuel
I also tried running over 1.5bar on the 1.5map sensor the 16V has, my turbo will easily flow 1.5 bar to red line and I can now finally report that it does not work, it appears the ECU cuts the fuel to the engine when the MAP sensor goes out of range
fuel and boost over 1.5 bar
This particular dyno I would say requires a 20% addition for transmission loss so that puts the result around 300bhp, and torque near identical to NickDs, so the two 16V's on 630cc injectors have made very similar numbers mine through .2bar more boost and Nick has headwork (mine has none).
An intersting point is both Nick and I run the T3 .48a/r hotside (maybe the same as a .63 t28?), and our peak power is generally around 5500rpm, I feel pretty confident if I went to the .63a/r T3, power would be up quite a bit as I suspect it is choking the power at higher revs.
given that I am running standard rods and pistons though big revs over the factory red line of 6500rpm isn't likely the best idea.
Anyway a revised chip is on it way from Flea to correct the fueling and so a re-test will be coming soon.
So far a good move in the right direction, up 35bhp with the 630cc injectors as it gives the fuel needed for higher boost. As always Leighton's serice has been excellent and with a bit of tweaking a few more BHP should be released