New combo is back together: home port 799, EPS cam, ported Fast 90mm
10-23-2011, 08:24 AM
#21
What is the AFR when indicating 102% ? Also Fuel Pressure?
When I was having drive ability issue's with my FIC's I installed the 28 lb injector's. I never did any WOT in third & fourth but first & second were no issue AFR wise. That is my 416 AFR 230's 243/247 combination.
When I was having drive ability issue's with my FIC's I installed the 28 lb injector's. I never did any WOT in third & fourth but first & second were no issue AFR wise. That is my 416 AFR 230's 243/247 combination.
10-23-2011, 10:37 AM
#22
I need to weld in a bung to use my wideband. I only have bungs in the headers for front o2s right now.
My old cam was on Comp XE lobes (.57x intake lift/ .56x exhaust lift). New one is EPS intake and LSL exhaust (.600/.615) so I'm sure that's helping.
Hard to say how much was the cam and how much was the ported/milled heads.
My old cam was on Comp XE lobes (.57x intake lift/ .56x exhaust lift). New one is EPS intake and LSL exhaust (.600/.615) so I'm sure that's helping.
Hard to say how much was the cam and how much was the ported/milled heads.
10-24-2011, 09:02 AM
#25
With a Fast 90mm intake amplifying things I doubt there is such thing as a quiet lsx, but it does seem noticeably quieter than the old combo.
It helped I think that I put the foam back under the intake since it came with the new intake gaskets. No longer have that plunger noise from the valves opening and closing, just a slight sewing machine noise.
My pushrods are still 7.4 though, using old Vortec 350 lifters I got 1 3/4 turns from zero lash to 22ft/lbs.
Just drove the car 250 miles in one trip and it runs better than ever and I didn't put a pen to paper to check it but fuel mileage seems to have stayed the same. Not bad for an email base tune and picking up a bunch of power.
It helped I think that I put the foam back under the intake since it came with the new intake gaskets. No longer have that plunger noise from the valves opening and closing, just a slight sewing machine noise.
My pushrods are still 7.4 though, using old Vortec 350 lifters I got 1 3/4 turns from zero lash to 22ft/lbs.
Just drove the car 250 miles in one trip and it runs better than ever and I didn't put a pen to paper to check it but fuel mileage seems to have stayed the same. Not bad for an email base tune and picking up a bunch of power.
10-24-2011, 09:45 AM
#29
It's a 113+2 LSA, so 111 ICL. Geoff said it would be great with my 6600RPM shift but will still be making power to 6800+ if I want to shift higher later.
I didn't realize the video sound quality was so bad, I will try to take a better one soon. Found out my brake booster is leaking vacuum so that explains some of the issues I've been having trying to get it to idle steady.
I didn't realize the video sound quality was so bad, I will try to take a better one soon. Found out my brake booster is leaking vacuum so that explains some of the issues I've been having trying to get it to idle steady.
10-24-2011, 01:42 PM
#30
It's a 113+2 LSA, so 111 ICL. Geoff said it would be great with my 6600RPM shift but will still be making power to 6800+ if I want to shift higher later.
I didn't realize the video sound quality was so bad, I will try to take a better one soon. Found out my brake booster is leaking vacuum so that explains some of the issues I've been having trying to get it to idle steady.
I didn't realize the video sound quality was so bad, I will try to take a better one soon. Found out my brake booster is leaking vacuum so that explains some of the issues I've been having trying to get it to idle steady.
Try one with the car away from the garage, or a drive-by would be good.
10-24-2011, 02:26 PM
#31
I think the exhaust is leaking slightly on one side too, that would explain that strange note that it has.
The exhaust ending under the car kinda makes everything resonate and rumble so it sound different in person.
Even on my work speakers which are really nice the video sounds like crap though. I'll get some outside the car as soon as I can.
The exhaust ending under the car kinda makes everything resonate and rumble so it sound different in person.
Even on my work speakers which are really nice the video sounds like crap though. I'll get some outside the car as soon as I can.
10-25-2011, 03:38 PM
#35
Now that I do not know. I measured them before removal at the correct 1.8 install height and they were PAC 1218 springs. The car showed signs of float on my old dyno graph when they were new, but they did have too many miles on them which is likely why it got bad enough to damage things.
Just ordered some 41# injectors from a supercharged Regal (got a set of 8 though) on ebay for a whopping $61 shipped.
Just ordered some 41# injectors from a supercharged Regal (got a set of 8 though) on ebay for a whopping $61 shipped.
10-28-2011, 09:30 AM
#37
Injectors should be in today. Have a birthday/halloween party tonight, but tomorrow I can install them and try to fix the tune for them.
I'm anxious to get a good WOT feel for this thing.
You can feel it start to wake up around 4k rpm even at part throttle. I think with the heads and intake letting her breathe it will have a ton of top end pull.
I'm anxious to get a good WOT feel for this thing.
You can feel it start to wake up around 4k rpm even at part throttle. I think with the heads and intake letting her breathe it will have a ton of top end pull.
11-07-2011, 10:10 AM
#38
Injectors in and scaled, car fired right up and ran great.
Replaced my brake booster and for the first time since I've owned the Chevelle (10 years) the brakes are impressive. Turns out it had been faulty all along. It was replaced during the disc swap years ago and was brand new out of the box. It always had a very easy feeling for the first half of travel then got hard as the brakes started to really apply. Was my first car and I expected it to be different than my parents newer vehicles so I thought nothing of it.
Needless to say the car was previously dyno tuned for the old cam with the leak...which helps explain why "correcting" the a/f lost me 18rwhp and 25ft'lbs I would think. Also helps explain my abnormally high IDC of 94% cam only.
I installed my wide band o2 sensor yesterday and now that the leak is gone my WOT a/f is rich at 11.5 on the hit and increases to 10.9 by 6000rpm where I stopped the pull. I expect some more power will be found once it is leaned to the 12.6-12.8 range WOT.
Replaced my brake booster and for the first time since I've owned the Chevelle (10 years) the brakes are impressive. Turns out it had been faulty all along. It was replaced during the disc swap years ago and was brand new out of the box. It always had a very easy feeling for the first half of travel then got hard as the brakes started to really apply. Was my first car and I expected it to be different than my parents newer vehicles so I thought nothing of it.
Needless to say the car was previously dyno tuned for the old cam with the leak...which helps explain why "correcting" the a/f lost me 18rwhp and 25ft'lbs I would think. Also helps explain my abnormally high IDC of 94% cam only.
I installed my wide band o2 sensor yesterday and now that the leak is gone my WOT a/f is rich at 11.5 on the hit and increases to 10.9 by 6000rpm where I stopped the pull. I expect some more power will be found once it is leaned to the 12.6-12.8 range WOT.
11-07-2011, 11:11 AM
#40
It's been raining all day, but this week after work I am going to start working on it.
Will tune the best I can on the street and might make it to the track Sunday afternoon to finish there if I get close enough.
No interest in paying for another $400 dyno tune when I have the software, a wideband, plenty of good safe roads, and the dyno sheet doesn't mean anything to me. If I can't get things lined out I might see about paying for some dyno time.
Will tune the best I can on the street and might make it to the track Sunday afternoon to finish there if I get close enough.
No interest in paying for another $400 dyno tune when I have the software, a wideband, plenty of good safe roads, and the dyno sheet doesn't mean anything to me. If I can't get things lined out I might see about paying for some dyno time.