rhamlinii
15+ Year Contributor
- 660
- 12
- Nov 8, 2003
-
Baltimore City,
Maryland
Any info?
I saw your signature, what about you aswell?
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Any info?
That sucks about the motor. How much nitrous off the line are you hitting it with? Also what kind of conveter do you use in your car? Is you car driveable on street for cruising?
160 direct port shot this weekend, and we are also looking to see if the AEM failed in controlling it correctly (it might have not pulled timing like it was supposed to). The stall is a precision stall for a 2g, the car also has a 2g auto in it.
I'm not trying to be a dick and i'm only asking as I don't know. How do you get the 2g tranny to work in your car? Also can you drive you car on the street if you choose confortably?
The fact that you only melted one piston is of concern to me. I would be looking into the fuel system as well. It could be that there was an injector malfunction or fuel . Usually when you have an issue that is timing related it tends to get more than just one piston unless you are just extremely lucky.
This was our first concern and we actually just completely redid the entire fuel system. The only thing we are still iffy about is our injectors and the only concern there is that they were getting too much fuel pressure but we corrected that with our new regulator. We are only running 40 base pressure so it shouldnt be an issue. If we find that it is still the problem the 160's are getting yanked out and some Morans will be going in.
Moran's 160's are BAD ASS. Snatched out the Big Stuff do to customer service and installed a FAST. Used the 160's in a Turbo LS (Stroked 6.0 408 c.i. LS based motor using a GT4788. 920 at the wheels through a TH400 and J.W. convertor on a set of STOCK 6.0 heads using comp springs lock n retainers.). I believe if you do find the injectors to be the issue you will be more than happy with the Moran set.
On another note I would be curious to know what the fuel pump voltage was throughout the run. Have ya'll ohm'ed out the injector harness to make sure there isn't an issue in it as well? Just a few thoughts...
well, not that it probably will make a difference and i'm sur eyou're already aware but the #1 cylinder usually needs it's fuel trimmed up a few percent because it tends to run leaner than the rest due to manifold design. The guy i got my new turbo from broke two pistons (cracked) at the wrist pin area due to detonation from a bad tune he got on a local dyno. After two pistons i started tuning it and teaching him how to tune and he hasn't had a problem since. He was pushing 672hp before the first piston let go, 2nd one let go on the same tune/same boost but on the street instead of the rollers
I trim my #1 up about 2.3% (just used plug readings to get this dialed in) and i trim the #2 up by 1.3%. I could probably pull a percent or two fdrom the number 4 but i figure instead of looking for that last drip of power i'd leave it as is for a safety margin. I know these are minimal changes but they show up on the plugs when i do a plug-chop and take readings, now they all pretty much look alike, and although doing plug readins on e85 is a little difficult it can be done
Mechanical pump? That's interesting, I didn't realize the Mitsu guys ran em. Would love to see pics sometime if ya feel like posting some. Good luck with your problem. I hope it isn't anything too serious/exspensive. Please keep us posted. Take care.
With that mech fuel pump and that regulator how low can you turn down your base pressure?The first picture is with our methanol motor, hence the no IC, second picture is from this previous race with the E85 setup.
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With that mech fuel pump and that regulator how low can you turn down your base pressure?
I find it interesting how this car passes tech with the fuel pressure regulator on the fire wall. Also no 1.25 min pipe around the fuel cell for being outside the frame rail.
With the new regulator we have it down to 40 base pressure right now, not sure we have tried any lower.
As for the mounting of the cell and regulator, we knew the rule for the regulator on the firewall but also have never seen that enforced at any track we have been to, and we have been to ALOT of different tracks. As for the cell, we didnt know that rule till after we built the front end that way. So far we have not been asked about it or anything so we are going to leave it. If it becomes a problem we will change it...
I agree on not messing with stuff till your called out on it, for us out here they would just ask you to leave, I got booted long time age for rubber valve stems, 2 weekends ago I have fray on my window net and they almost wouldnt let me run, the net is brand new. Good luck on your guys quest, looking forward to seeing more from your camp.
Car is looking good guys! Sorry to see your still having engine problems. When I come across odd things I always send the ECU and injectors in for testing to be safe. I'm not knocking the tuner but I'd be interested in seeing a log or the map to see if something looks funny. I honestly have never experienced any problems with any AEM myself or friends have owned except one time I accidentally back fed power through the main relay somehow and burnt the main trace in the AEM. On a side note I'd ditch the direct port and go to a wet shot whereas I've sen clogged jets burn up a single cylinder before. Of course this is all my personal opinions and I know I'm no pro.
P.S. tell Darren I said hi! If you remember I borrowed his nitrous bottle at KC IFO in 2008!
Jason
Yeah sounds like there should be plenty of fuel . I have to ask this whereas I know people that have tuned several cars and never did this but did you make sure the timing was sync'd in the AEM options where you lock the timing then adjust it until the crank pulley marks match the EMS setting? I'm sure you did but it never hurts to ask whereas I'm just trying to think of things.
On a side note on the FPR, I was told when I teched in that in our "sideways" engine application it can be mounted on the firewall as long as it is 12" away from the bellhousing which is obviously towards the drivers side.