I like your silicone setup from your factory air box. Where did you get all the parts???Hi guys, first time poster here.
I've really enjoyed reading the entire 94pgs or so, but I need your help!
I've got a 1994 Hdj80 1HD-T auto, 4" lift on 33's, I've done a 4" in/out airbox mod, has top mount, Safari snorkel, a jap import 2 3/4 exhaust (was on it) and I have had the standard turbo running at 17psi for a few years now, I modded the fuel pin grinding the taper deeper and was running a tune that worked really well, responded well, egt's maxxed at 700deg pre turbo up long mountain pass, a slight puff smoke off the line, 350deg @11psi @100kph steady. EMP as expected relatively high at about 2:1 @3-3.5k rpm.
Gauges I've got boost & EGT, EMP, but do not have AFR yet.
So that's my back story, I've recently taken the plunge and bought and fitted a Mamba 12-11 Td05h 18g, I've changed nothing yet fuel wise and am really shocked at how high the egt's have shot up to and how relatively unresponsive it is.
It is sitting at 500deg at 100kph and only 5psi boost. It also only seems to want to boost to 17psi as well at max throttle even though I got greedy and installed the strongest alternative wastegate spring that came with the kit... EMP at 17psi and 3-3.5k rpm is about 30psi.
I realise I have to tune the fuel for it but I'm really confused about which way to go!
With the low boost response I'd up the fuel but the egt's are already high so I feel like that may only make things worse, what could possibly be wrong here? Could the 22psi wastegate spring be causing the high EGT by causing higher EMP?
Should I change it out for the 18psi spring?
Or do you think this is purely a fuel issue?
I'd really appreciate any help you guys can give me!
Cheers Jeff.
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