Ellow, me again, I stumbled across some extra gogogo, changing one thing at a time on the EBC. The gain setting made the difference, will it cause any probs by turning it up and leaving it there? It was set at 5, I adjusted it to 20, gives a good neck workout.

Ellow, me again, I stumbled across some extra gogogo, changing one thing at a time on the EBC. The gain setting made the difference, will it cause any probs by turning it up and leaving it there? It was set at 5, I adjusted it to 20, gives a good neck workout.

 

it will cause huuuuuuuge problems if your car doesnt have the supporting mods to be able to run more boost!!

 

make sure you have the ecu chipped for more fuel, free flowing air filter and exhaust, colder plugs, prefer uprated intercoolers and a decent boost gauge to see how much boost your running at.

 

if its a standard engine, turbos and injectors you can get it to 1 bar or 15 psi (ish)

 

Mike

Does your EBC not tell you what boost your running as well ? or have you an aftermarket boost gauge?

 

Though you've wapped it up, it still doesn't solve your original problem of loosing boost pressure and the car being slower!

smithy

I have 4 chanels on the EBC. CH1 = 30% CH2 = 60% CH3 = 15psi CH4 = 17psi scramble. The limit is set at 17.4psi. I don't run on CH4, scramble cut in on throttle response. I run CH1 and 2 normally and CH3 to play. I adjusted the gain on CH3 only.When I bought it, it was guesstemated as around 450bhp but just keeps up with a MK3 Supra running at 385bhp.

Nice foto Funky, A real hotrod, goes like a rocket.

Will blow up like one by the sounds of it....

surely this is the gain he is adjusting, not the boost?

 

adjusting the gain is the boost ramp up surely. if he is boosting less than 15 psi then its going to be safe ?

taken from the Blitz manual.....

 

It's not easy to describe what the GAIN really means. It helps to understand that the DSBC is able to alternate its two valves very quickly, especially when compared to other systems with only one larger valve. WIth this the DSBC is able to increase boost very quick ... but this can cause extreme and dangerous overboost situations. With setting the Gain you are defining how quick the boost rises. It's in your hand to accept a small overboost but reducing the Ratio to a healthy boost level when hitting the limiter.

 

Typically, a Twin -Turbo system creates quicker boost than others due to the smaller turbos. Also sequential turbo systems and designs with vacuum canisters are made to get full boost very quick. The GAIN setting on such systems is much lower than on cars with single turbos !

 

We now know that the higher the Gain setting is the faster the turbos build up boost. This is simply done by starting to open the wastegates later, i.e. starting to alternate the Blitz solenoids. The Ratio then controls the length the solenoids stay open (frequency). Looking at the table in the DSBC manual didn't helped yet, but the longer it takes the more understandable it becomes :) Please take it for a short look at it :

 

The first line with GAIN describes the Gain setting for these cars (180SX,Skyline, GT-R, Chaser, Supra TT, RX-7, Lancer EVO) while the next lines describe the Ratio to achieve the pressure in the first column. Please note, that there is a major typo as the 0.10kg should read 1.0 kg and so on :) The problem was now that we had good results with G30 even without a lot overboost when launching ! But due to the table the car should overboost a lot ... and it does. I was able to hold the car's boost with the throttle around 0.5bars in 3rd, 4th and 5th gear. Then boost was already there and the turbos where at their speed. Now I floored the pedal and boost made a huge jump up to 1.35 bars at different rpms (gears). This may not happen when driving around normally and depends on the type of your car !

 

Summarize :

 

- A smaller Gain lets boost increase slower but prevents any overboost.

- A higher Gain causes a fast boost increase but you'll run in danger of overboost !

- The best is to set a Gain that gives only a small overboost that will be secured by a smaller Ratio limiter setting.

- On the 3000GT the best result was G8/R48 that peaked up to 1.05 bars and produced a steady boost of 1.00bars

So if I turn the gain down a touch I should bo ok.

 

Thanks chaps