First of all what are causes of turbo lag ??? I have a slight exhaust leak and i believe that it could be coming from the manifold somewhere on the passenge side but its not particulaly bad . The boost dosnt relly come in till 4000rpm !! could this slight leak be causing this ??? even with this leak i had it dynoed last week at 385.8 bhp at 0.9 bar . On the graph you can see this but when the boost comes in the boost curve is very steep its not smooth . The technician thinks the car might have bigger turbos on, and thinks this might be causing the lag i bought the car blind and dont know its history what i know is that its got an evc 3 and an apexi afc and a hks fmic i mean what do the tech heads on here think with standard turbos would the boost curve be smoother or could it be this slight exhaust problem causing the turbos to lag and making the curve very steep from 4000rpm i mean isnt 385.8 a bit high for standard turbos????

 

Please advise someone

The first quistion they will ask is if that is at the fly wheel or the wheels?

 

I can't help with the answer unfortunately but I'm sure someone will be a long that can.

 

Darrell

more interested in your torque curve if you think you have uprated tubs, where its creating max torque and how it tails off will tell you about the impellors and compressor

answer to the first question is 385.8 at the fly wheel just over 320 at the wheels and im just going to find the papers to have a look at the torque ill see if i can scan them and put them up on here so you guys can have a proper look

Fix the ehaust manifold leak and when u have pulled the engine to do this, have a look at the turbos?

err could someone tell me how to put pictures up on i must be a bit simple or something but i cant seem to manage to do it ????

also appart from the slight manifold leak could there be any other reason why they could be lagging ???? appart from them being bigger also from underneath i can see that the housing on the turbos says garrett so i imagine they must be standard huh ???

You are really asking unaswerable questions, you have to pull the engine to fix the manifold leak so you can see the turbos in all their glory then.

well i aint pullin it out mate i cant even pull my finger out lol ! i get someone who knows what they are doing to do it ive been quoted 700 quid for this . Cheap init lol !! oh well i get that done and see what happens anyone know any good garages in kent ???? Dont want to be travelling half way round the world to be getting work done

Join the club and I will tell you of a good 300zx mechanic in kent :tongue:

will do, ill pm you when im subscribed so you can release the sensitive information lol ! i tried to do it a little while ago but the forum didnt like my card details !!! i aint a villan honest lol ill contact one of the top boys on the forum ill see about sending a cheque