What do you think of my hp/tq numbers?
01-27-2007 | 02:29 PM
#21
also i assume with that cam, it should be common for it to idle kinda low (sorta a small surge) when the car is cold and its just sitting?
also one thing i noticed lately, its been somewhat chilly here but even when its nicer out, it hasnt been starting on the 1st try. it will start, run for a few seconds, idle will drop and it dies. but then the 2nd time it fires right up and stays running. i think maybe thats because of the small injectors?
also one thing i noticed lately, its been somewhat chilly here but even when its nicer out, it hasnt been starting on the 1st try. it will start, run for a few seconds, idle will drop and it dies. but then the 2nd time it fires right up and stays running. i think maybe thats because of the small injectors?
01-27-2007 | 02:31 PM
#22
Originally Posted by 95 Camaro Z28
any simple fix to the compression problem?
and what exactly can i do with the gen 6, anything that would help me correct the lean problem.....
and what exactly can i do with the gen 6, anything that would help me correct the lean problem.....
01-27-2007 | 06:53 PM
#27
Stop worrying about the injectors. You need to log the car to see what is going on and if anything is out of whack. Just buying bigger injectors won't do anything. If anything you should put the DFI to work and mess with the tune and try to richen it up a little and maybe add some timing.
01-27-2007 | 07:39 PM
#29
actually the more i think about it, the more this is what im thinkin...
i just got the car, guy said he got it dyno tuned, i have dyno sheet from finishline performance.
he told me after driving the car from milwaulkee back home it should have 1000 or so miles on the motor. do you think it should go back in for a retune? or is the initial tune still fine?
i just got the car, guy said he got it dyno tuned, i have dyno sheet from finishline performance.
he told me after driving the car from milwaulkee back home it should have 1000 or so miles on the motor. do you think it should go back in for a retune? or is the initial tune still fine?
01-27-2007 | 09:37 PM
#32
Teching In
Joined: Nov 2006
Posts: 21
Likes: 0
Originally Posted by 96capricemgr
Why the Gen 6 DFI??? seems like that is just unnecessary complication.
Would like too see the dyno sheet to be sure but I don't think I would be happy for a M6 383.
The 14.5 AFR sounds like it was just the moment they told the dyno to begin recording, he said it drops to around 13.0 might be a touch lean which will show good dyno numbers but may benifit from a touch more fuel at the track.
On the injectors if they are 30lbs but are being run at a higher pressure than that rating they could easily be supplying adequate fuel with reasonable duty cycle.
I cringe when I see cams ground on a 114 in an NA car because it usually means someone speced too big a cam and wanted to tame it rather than picking the all round right cam.
I would like to see what it would do with decent compression and a better cam, bet it would really wake up, given the power it is making with those handicaps the heads are probably pretty good. Far as the note about low compression for possible future boost or juice, sorry to say juice loves compression, I do not know why people want to build low compression juice motors it is a common misconception though.
Would like too see the dyno sheet to be sure but I don't think I would be happy for a M6 383.
The 14.5 AFR sounds like it was just the moment they told the dyno to begin recording, he said it drops to around 13.0 might be a touch lean which will show good dyno numbers but may benifit from a touch more fuel at the track.
On the injectors if they are 30lbs but are being run at a higher pressure than that rating they could easily be supplying adequate fuel with reasonable duty cycle.
I cringe when I see cams ground on a 114 in an NA car because it usually means someone speced too big a cam and wanted to tame it rather than picking the all round right cam.
I would like to see what it would do with decent compression and a better cam, bet it would really wake up, given the power it is making with those handicaps the heads are probably pretty good. Far as the note about low compression for possible future boost or juice, sorry to say juice loves compression, I do not know why people want to build low compression juice motors it is a common misconception though.
01-27-2007 | 10:30 PM
#35
Initial tune should be fine. Just log the car to see if there is any knock, what your duty cycle is and also to see what the timing was set at. Maybe they dialed the timing back cause the engine was new and they didn't want to beat on it. Also the A/F seems a little on the lean side, but not too bad, normally it's accepted that around 12.5-12.7 is ideal so your 13.2 is a little lean. One problem I had was that my valve lash was too tight, so you might want to pull the valve covers and check that out too.
01-27-2007 | 10:43 PM
#36
Originally Posted by DroppedM6Z
Not bad, but the reason i didnt stroke mine. Some dont even make it over 400hp or 400tq. Many 355's produce that number.
no its cause your i tight ***
01-27-2007 | 11:04 PM
#37
Boost likes low compression because you get cylinder pressure from the additional air being forced in, too much pressure and the charge can detonate before the plug fires. Nitrous is not extra volume being introduced it is just a gas with a greater oxygen content than air being injected in place of some air so it does not generate the same higher cylinder pressures that can cause detonation.
Sort of oversimplified and I sure someone will have a correction to make but the general idea is there.
Nitrous also greatly cools the incoming charge, when it changes from liquid to gas is something like -129 which is why you see boosted cars running a small shot as an intercooler.
Sort of oversimplified and I sure someone will have a correction to make but the general idea is there.
Nitrous also greatly cools the incoming charge, when it changes from liquid to gas is something like -129 which is why you see boosted cars running a small shot as an intercooler.
01-28-2007 | 02:30 PM
#40
yea it will just take some time to figure it all out.
another thing though, last night i went and started it for the 1st time since the day prior and it ran like crap. it died out the 1st 2 times after i started it, 3rd time it stayed running but when i would try to accelerate from a stop in 1st it would wanna die out unless i got it up over 2800 or so and worked the clutch a bit...i kinda seemed like the longer i drove it, it got a little better. you guys think maybe the cold weather at fact the motor was really cold was the reason it wasnt running right?
another thing though, last night i went and started it for the 1st time since the day prior and it ran like crap. it died out the 1st 2 times after i started it, 3rd time it stayed running but when i would try to accelerate from a stop in 1st it would wanna die out unless i got it up over 2800 or so and worked the clutch a bit...i kinda seemed like the longer i drove it, it got a little better. you guys think maybe the cold weather at fact the motor was really cold was the reason it wasnt running right?