Where is all my power

Shift518 Automotive
1

I know someone on this board can help me in some way shape or form as many of you have encouraged me to not give up and get my car done. It runs and cools down now as that was my big issue last year but now are faced with the last couple bugs. To begin for those of you that don’t know I have one of those projects that have been taking years to perfect as I have bought a motor set…pulled it…completely rebuilt by Hunts machine shop but still not running 100%. I have a S13 with a SR20 Rebuilt motor with everything (minus fuel mods) done for performance adders.

The first problem occurs with the amount of power my motor is receiving. Although it sounds aggressive…turbo spools …it’s not goes limp as you try to roll on the boost. 240 Bob came over and checked the timing as I have stage two BC cam gears/Greddy Adj Cam gears thinking that it was off a tooth. We did not find that at all and everything seemed to line up. We are going take it for a test drive in two weeks when and plan on using a timing light to make sure everything is in sync. We have check not only the timing but vacuum line leaks, the IC, grounds, but still no power. I have read (on Nico) that you sometimes need to advance the degrees when you combined that stage two with a aggressive cams but have not found enough to support this idea. Anybody else run aftermarket cams or gears and have you had to make any adjustments? Bob called a couple Montreal D1 guys and they said to line it up TDS and it should work. So I am looking for answers/imput from all on that situation.

The second question is more to see if anyone has a wideband that I can use? When I pulled my plugs today we could tell I was running very rich. I plan on putting a 300ZX fuel filter (and upgrading injectors when it hit a dyno) in to see if that changes anything but would still like to see where exactly it is was running. So if anyone has a spare wide band I could borrow for a couple days I would pay deposit and rental.

Thanks guys

2

Buy a wide band 02. It’s a must for any turbo car to monitor what’s going on.

Who made the map for the car? How are you managing the fuel?

Do a compression test too to get a baseline health of the motor.

3

Dude you need to get it tuned lol, you have a built motor, bigger turbo, bigger injectors, etc etc etc yet no tune whatsoever lol.

Get new plugs, warm the motor up, pop old plugs out, put new ones in.

Then start the car, do a good 1st/2nd gear pull and coast back. Pull plugs, post pics.

That’s the best you’re going to do to find out even remotely whats going on with that tune without a WB02, or putting it on a dyno.

4

wow fizzle you are right man , id plus rep ya but it wont let me

5

only thing i would add to that is at the end of the full 2nd gear pull. press in the clutch, shut the car off then coast in and pull the plugs. if your coasting at idle for a while the plug will change from the WOT color to your idle color.

6

once upon a time the fastest cars in the world were tuned by this method. We have many advantages to our fore fathers and still cant get it right. LoL

You can also cut the plugs and and check fuel rings by the base of the insulator. Its a lost art among all but big dose nitrous tuners.

7

Whoa! Yeah if you have all of that I wouldnt even be driving it hard until a tune is worked out.

8

Yeah he has a T28 and 550cc injectors IIRC. CP 8.5:1 pistons, cams, I think stock rods? dunno.

9

i still tune off of plugs ,and wideband

10

always checking my plugs here too.

11

I have the T28 but did not mod the fuel system (still on 330CC) at all as I know you would need advance dyno tuning. We did pull all of the plugs when we took the vavle cover off and bob reported I was running lean (which makes sense as I would like more bigger CC injectors.) In my mind though it still is off as it does not really build power right now… I have a apexi stand only and can check most every sensor in my car but still need to invest in the wide band to see where I am at. I thank you all for the suggestion and will keep those of you care updated on this painstaking as you will see it in action for the first time every this year.

12

Be careful if you are leaning it out to much!

13

Dude don’t drive it until you can do everything proper, this motor will not end well if you do.

14

Does that thin have a wide band O2 attached to the ecu somehow? If so just log that and you will be able to see how the afr’s are without buying anything else.

So to get this straight you have a stand alone, but dont know how to tune it? I am missing something here. Also dont most stand alones have an adaption anyways that gets you in the ball park?

Either way man, no knowing your afr under boost/power, I am sure you dont know your timing either. Lean + boost + lots of timing = kablooooooie in no time. i dont care if its a Nissan, VW, motor cycle, sled… a motors a motor and they all blow up the same ways! be cafefull.

go get a laptop, slap it on the ecu and do some logs and post it up we can help, but we dont have anything to go off of right now.

15

All your power is still in a bottle somewhere.

16

We don’t really drive it just start it and listen most of the time…its a real nice lawn ordament at my dads

17

I researched what you said and it does have a way to get AFR off the stand alone so need to order that this week and see where I end up.

Thanks for the advice and will give you guys some more feedback and maybe a picture or two this weekend!!

18

NOOOOOOSSSS!

http://i89.photobucket.com/albums/k212/maverick41584/fast_furious_024.jpg

translation: your shit is going to blow up. Bring it to someone who knows what they’re doing QUICK, oh, and I suggest you tow it there.

19

It ended up being a vacum line as the car matched up with the timing light and node light test. We found a loose IC clamp and vacuum line but are not out of the woods yet. For all the haters it felt great to spool the turbo agian

20

if u push in the clutch and shut motor down the last remaining fuel will freeze the plug and give u a more accurate reading on the plug. also would do a plug chop and check the colr on insulator.
What does the cam card say as far as timing ??