20TT turbo lagg

[lotech49]

Ok so here are those dyno sheets

This a comparison of a previous dyno just after my engine rebuild and no real mods and after adding Prova extractors, Rage downpipes, Gredy Profec B Spec II boost controller and a Mines ECU.

During the moding process the biggest power increase I felt was raising the boost, no surprises there. The boost at stock was 14.2psi and 15.2psi and gave 158.1kWatw.

Turning up the boost to 14.9psi and 16.8psi gave 180kWata.

Generally I have the boost slightly higher, peaking around 17.6psi but was messing with the controller on the way to the dyno and didn't have time during the session to try different settings.

What I did test is the Mines ECU vs Stock and here's the result:

Surprised? I was, the Mines ECU felt heaps stronger on the road so I was really surprised peak power was pretty much exactly the same.

Thinking about it though peak power is more about pumping air through the engine at wide open throttle, whereas the improvements I could feel were more about off boost performance. Specifically the cars ability to pull in third gear around town.

It was also interesting that I felt the Mines had really decreased the VOD however on the dyno it really seems to have made no difference.

Again I think its the power increase at less than WOT that gave the impression of dealing to VOD issues.

Ultimately I'm going to convert to single turbo to generate some real power and get rid of VOD so I'm toying with selling the Mines, I'll post in 'for sale' on here if so...

I'd certainly recommend the Mines for anyone running standard boost as it raises it by 1.5psi so you should able to see similar results as I have here...

[87_starion]

Sorry to drag up an old thread, but what are the standard B4 fuel pumps like?

Im sick to death of the detonation in my B4, its either fix it or get rid of the thing.

Im going to get the ECU remapped for NZ 98 but want to make sure the fuel pumps are

upto the task before the car goes on the dyno?

Anyone got any experience with them?? Cheers

[Joker]

det on 98? what boost you running? reset ecu? codes?

[ROYALS STI]

My mate has a 02 b4 with 2.5 rage down pipes and custom 3 inch exhaust, primary turbo replaced with a t04 turbo, walbro pump etc. Makes 172 kw at the wheels and drives heaps better than it was from factory. His check light comes on when he starts it, I think it needs a remap of his ecu to handle the extra boost from the exhaust (can hit 17 to 18 psi sometimes ). Any ideas on the check light ? I told him to get it scanned. I guess the moral of the story is he spent $2500 for that work and gave good gains but not blow your socks off.

[87_starion]

 JoKer said:

det on 98? what boost you running? reset ecu? codes?

Hi, yes only used 98, standard everything except rear muffler, no faults in ECU.

It has only started since the last refil of 98 from BP near my house, but even if it is a bad batch of

gas its pinging its tits off and surely these things are not well tuned for our country? All my old EVO's and VR4's would run over 20psi on pump 95 no worries and my Skylines never gave hassles on pump gas either :'(