My dyno Results

[FourG63 97GST]

Well i'm a knoob to tuning, I notice that bolt ons dont cut it anymore.
so help me out here


k well, here's my dyno, i wont say i'm dissapointed yet, but I was expecting more

Engine mods:
Ported AGP T28
david brode uicp w/ 1G bov(uncrushed)
TurboXS HPBC
3" Turbo-back (O2 eliminator downpipe, and testpipe)

I dyno it at 15PSI
bone stock Fuel system

what you think about there Air/Fuel?

(no scanner so i took a pic )

 

[Airpoppoff]

nice dyno, you need to work on that a/f

 

[vertGST]

here's mine

Brendon

 

[workin_on_it]

ya it looks like your running really rich!!! looks pretty good tho....really flat torque curve adn lots of usable hp! you can definately see where the turbo is fully spooled.

 

[MNGSX]

Three words.

Wide Band O2.

Too bad where you did it did'nt hook one up.

You have a big T28 and are barely breaking 200hp.

It's not the turbos fault.

You have a stock fuel system for starters.

I see you have 550's on your list.

If it were my car I'd do link and 720cc's (Fast 720cc's)

As long as the ECU can compensate for them there are no disadvantages to big injectors at all.

Next I'd do a pump. Walbro 255.

Filter. Aeromotive inline.

Adjustable FPR.

The problem is that with what you have now there is'nt a whole lot of control of things.

With what I laid out you have full accurate control of fuel and timing.

You can also monitor A/F accurately. If you get that stuff before you dyno tune it in on the street a bit.

Once you get baseline things like injector dead time calibrations on target work on timing and fuel trims. Advance timing until it knocks just a little bit. Not enough to pull timing but to register knock counts. Then back it off a bit. Next adjust the fuel trims swing from just a little rich to a little lean of stoich. Go with what runs best and feels best via the butt dyno.

When you dyno again after that it will look much better. You will also have the capabilites to do something about what you see on the dyno now. You should be in the ballpark but fine tuning can only be done on a dyno.

 

[Violater101]

Don't take this the wrong way, but I made 240 on my big28 @15psi with basically similiar mods just to give you an idea of what your potential is. I also was on stock fuel system aside from a 255hp pump. I think you have alot more in it.

 

[MNGSX]

Hmm a 255 pump and you made more power.

When boost pressure goes up the pump has to provide more pressure and usually sacrifices flow.

FPRs use a 1-1 pressure increase so that the fuel difference between fuel pressure and intake pressure is the same at boost.

Just using a higher GPM pump that can flow at higher pressures will allow you to make alot more power on even the stock injectors plus at idle and part throttle everything is the same.

That is why your car made more power.

If that is anything like the FP 28 in the right hands 275hp is'nt unheard off.

I assume that was a chasis dyno so your crank HP is over stock but with a FWD drive line I was expecting atleast 225 to the wheels on a stock fuel system.

 

[Violater101]

I was just giving him an idea of what he can expect, not knocking his #'s. Big28 is a nice turbo. I liked it, but decided I wanted more power and found a deal that was too good to pass up.

 

[MNGSX]

Im not knocking either.

He said he was expecting more.

I said here is why it was'nt there.

 

[hostile]

I would also say go with dsm link, denso 660 injectors and a denso 190lph pump.

Also nobody mentioned your intercooler, after these fuel mods, it will probably be maxed out.

A supra side mount should handle your turbo easily, and the price is right.

 

[DSMJim]

Originally posted by Airpoppoff
nice dyno, you need to work on that a/f

He is at 12:1 after 4k RPM whats the problem with that? IMO that's a bit too lean, around 11.5:1 is a better street tune from my experience.

What do you think it should be just out of curiosity since I'm getting the feeling that you dont think that's very good. You think it should be leaner or richer?

 

[FourG63 97GST]

k thanx for the advise.

but just making sure, you saying that Air/Fuel isn't accurate?
because I do find it weird it says i'm running rich when i'm on stock pump and injectors.

 

[Violater101]

I have my car tuned to 11.4 11.5:1 on pumpgas @19psi

 

[FourG63 97GST]

so my a/f is fine right?

 

[crashed97tsi]

I have the exact same turbo and I had similar mods when I got my car dynoed, save for a 190 lph pump. I made 224 hp. Fuel is definetly holding you back. Get dsmlink or a SAFC/logger combo. Put in bigger injectors and your good to go. The difference is amazing

EDIT: Wasn't the exact same mods, but the same parts modified

 

[Violater101]

It's seems abit on the lean side for my liking. I can't see exactly what its reading, but it appears to be around 11.8 or 11.9. That's okay if your not knocking, but I like to tune to around 11.4 or 11.5 and be more conservative.

 

[98TsiAWD]

Originally posted by FourG63 97GST
so my a/f is fine right?

Your a little lean, I would put in a VR-4 fuel pump and you should be fine or turn your boost down 1 psi maybe.

 

[DELTA_Rotary]

Yeah your running on the edge. Thats actually where your going to make the most power so when you richen it back up for safety sake expect the hp to drop alittle bit lower.

 

[mccurdy]

I put down only 230 fwhp on a 19C turbo with stock fuel system at 15 psi with a 24 row fmic, bc, hks ssqv, upper and lower I/C piping and 3'' Greddy SP cat back exhaust. I got a 255 lhp , 550's and a S-AFC2 on the way (gets here this friday) Im expecting I should put down close to 300 fwhp with ease with the right tuning =).

If fuel doesn't help you out, i suggest upgrading to a bigger turbo, like a 50 trim or green FP series. thats what im gonna do

 

[JET]

Well, the AFR's are fine on that, I agree a little lower is safer and I usually go for 11.3:1. As for these people saying you will raise your HP if you add injectors or pump, they are on crack. Your AFR's are fine, so you are not running out of fuel. You should at least rewire the pump, just for safety's sake, but it won't add any HP.

I would say to get a dsmlink next, so you can see knock and timing.

 

[Enigma_Man]

Yeah, as far as I knew, 12:1 was the optimum fuel ratio for power from the gasoline. Leaner than that is only for low-throttle emissions, and richer than that is for only when you need it (knocking, too high EGTs, etc)

-Jesse

 

[doug]

You should see my dyno run from that same day. My A/F is literally off the bottom of the page I was running so rich. With no AFC or DSMlink (yet), is there anything else I can do to lean things out some?

 

[MNGSX]

Doug

An adjustable FPR could do the trick.

What mods do you have that increased fuel delivery that much?

You could also un hotwire your pump. If you have a relay on it.





As for everybody else.

If they go over 15psi. They will need an upgraded fuel pump.

 

[Black95TSIawd]

i thought it would be easy to hit 200whp with the stock t shitty 25

no flame intended. Just worried my car isnt up to par now.

 

[JET]

Originally posted by MNGSX
Doug

An adjustable FPR could do the trick.

What mods do you have that increased fuel delivery that much?

You could also un hotwire your pump. If you have a relay on it.

Alright, like 4 people have talked about changing the fuel pump to change the AFR's. THAT WILL NOT HAPPEN! What do you think the fuel pressure regulator does? A stock pump will never outflow the stock FPR. A rewire is a good thing, period.

One way to lean it out a bit is to hack the MAF. This allows more unmetered air in and will lean it out. Only do this with a wideband though! You can remove the bottom honeycomb on a 2g, but I wouldn't do more than that. Most of them don't like it when you remove the side ones.