Can Car Be Driven Untuned?

[99 gs iowa]

how bad is it to drive my car with it being untuned if i just leave it at 8psi? sorry if this is kind of a newb question but i am completely new to all this and dont want to mess my car up as i have way to much money into.

 

[Fast95GSX]

You can as long as you keep an eye on your wideband. You should invest in something to tune with though...

 

[tkelly27]

Pretty bad. Watch a wideband. Your ECU isn't designed to provide fuel for any boost at all. Your forged internals might hang with it for a while, but you will most likely have detonation due to a lean condition and that's not good for anything. In fact, detonation is probably the #1 way engines die while people are tuning them. They'll have a bad tune, be nowhere close to the limits of the engine, and *pop*. Luckily this often manifests itself as a blown head gasket, but some times it just wipes out the whole engine.

It's kind of like having a new fancy watch and then asking "what happens if I swing this baseball bat near it, is that bad?"

 

[glowryder]

x2.. Like we have discussed. its a large risk.

 

[GoCanes777]

Walk or ride a bike not worth the trouble

 

[99 gs iowa]

ok i think ill do the right thing and be getting a tune and a dynosheet this week

 

[glowryder]

Yup, since its an EIC, your "out of boost" Characteristis "should " be the same and there should be little to no risk there.. minus that weak Fuel pressure gauge.

 

[99 gs iowa]

Yup, since its an EIC, your "out of boost" Characteristis "should " be the same and there should be little to no risk there.. minus that weak Fuel pressure gauge.

ya im just gonna drive out of boost the couple miles up the road, and that is the best fuel pressure gaige ever!!

 

[99 gs iowa]

tuned today, made 201whp at only 6 psi gonna tune to 15psi tommorow and see what happens, hoping to hit the 300whp mark

 

[Abe'sGST]

tuned today, made 201whp at only 6 psi gonna tune to 15psi tommorow and see what happens, hoping to hit the 300whp mark

Pretty good power, but i highly doubt a few more psi can bring it up 100whp.

 

[99 gs iowa]

Pretty good power, but i highly doubt a few more psi can bring it up 100whp.

im bringing it up 9psi?

 

[Abe'sGST]

I know, but even that won't give you 100whp more. What are you tuning it with?

 

[DSMTyson]

Why not tune for something like 20psi? You have the bottom end for it. 20G's don't even wake up until 21psi..


You should be able to make 300whp at about 17-18 psi.

 

[99 gs iowa]

tuning with portfueler, and im only going to 15psi for now because with hahn portfueler thats as much as i can do with out pulling timing, and all have a dynosheet tommorow with the numbers? who knows i might hit 300 i might not just a goal

 

[glowryder]

Good numbers. Glad to see it go well.

 

[Slo2gen]

300 around 15psi is possible, but a lot of factors are taken in to account. I made the numbers I did at only 17 or 18psi.

 

[99 gs iowa]

its stuck at 6psi, tuner thinks its the wastegate

 

[mattasi]

Oh dang! Yea you could see 300 or close to it. But as already said if you can turn that boost up to around 22psi to really start having some fun with it, if you have the supporting mods and what not.

 

[glowryder]

i dont think its the waste gate. Thats my IMO. I know they tried 2 controllers, but im not to sure why they couldnt turn it up with an MBC, i think install error. Its all mechanical, and if the WG is functioning without the MBC, holding 6psi, and opening up when you shift.. then logic says ###### the MBC. idk Jus my .02

 

[99 gs iowa]

i dont think its the waste gate. Thats my IMO. I know they tried 2 controllers, but im not to sure why they couldnt turn it up with an MBC, i think install error. Its all mechanical, and if the WG is functioning without the MBC, holding 6psi, and opening up when you shift.. then logic says ###### the MBC. idk Jus my .02

ya but the thing i dont understand is we tried multiple mbc an still no more boost

 

[glowryder]

idk, Perhaps MBCs dont work particularly well on Internal gates with that small of a spring. I dont see why they wouldnt, but who knows. Theres 2 nipples on them,, think its possible they hooked them up wrong.. did the swap hoses? Idk, sounds weird. the only think i can think of is the MBC needed to be closed more, to prevent the WG from seeing pressure.

 

[VelocitàPaola]

They could try disconnecting the wastegate from its vacuum line. If it still won't boost more, the spring pressure isn't enough to overcome the exhaust pressure -- that would be pretty odd at just 6psi, though.

 

[GSTurbo1]

i made my dyno on 5psi just ordered a boost controller, I feel like I should break 300whp by the time I reach 15-18psi