New Dyno Chart using Tephra V7; Any Feedback?
Dec 16, 2009, 08:54 PM
#17
Car has a 3" WORKS resonated test pipe. Maybe I should try other gas in the area. Are octane boosters any good? Do they really increase the octane rating?
Exhaust is:
Self Ported Exhaust Manifold
Ebay Titek V2 clone O2 Housing
Works 3" DP
Works 3" Resonated Test Pipe
Works 3" Cat Back with their 3" Exhale Muffler.
Intake is Works Drop In and I hacked the airbox lid (cut a hole on the side farther from the engine heat).
Exhaust is:
Self Ported Exhaust Manifold
Ebay Titek V2 clone O2 Housing
Works 3" DP
Works 3" Resonated Test Pipe
Works 3" Cat Back with their 3" Exhale Muffler.
Intake is Works Drop In and I hacked the airbox lid (cut a hole on the side farther from the engine heat).
Dec 16, 2009, 08:59 PM
#18
Car has a 3" WORKS resonated test pipe. Maybe I should try other gas in the area. Are octane boosters any good? Do they really increase the octane rating?
Exhaust is:
Self Ported Exhaust Manifold
Ebay Titek V2 clone O2 Housing
Works 3" DP
Works 3" Resonated Test Pipe
Works 3" Cat Back with their 3" Exhale Muffler.
Intake is Works Drop In and I hacked the airbox lid (cut a hole on the side farther from the engine heat).
Exhaust is:
Self Ported Exhaust Manifold
Ebay Titek V2 clone O2 Housing
Works 3" DP
Works 3" Resonated Test Pipe
Works 3" Cat Back with their 3" Exhale Muffler.
Intake is Works Drop In and I hacked the airbox lid (cut a hole on the side farther from the engine heat).
You may wanna try an open element filter in a hacked box. Your having knock and cant raise timing in the high RPM right? Well the filter will help out the high RPM, and will make the car LESS knock prone in the high RPM.
Just make sure to reduce your duty cycle, since running a open filter will make it run a psi or two more boost at redline.
Dec 17, 2009, 01:32 PM
#20
No, with 93 and holding what looks to be 21 psi at redline that seems pretty good.
I'd say have more power with boost, if you have enough injector.
Knock is minimal and looks about MBT for that fuel. Maybe add a point of two of fuel into it and see if that reduces knock.
I'd say have more power with boost, if you have enough injector.
Knock is minimal and looks about MBT for that fuel. Maybe add a point of two of fuel into it and see if that reduces knock.
Dec 17, 2009, 03:41 PM
#21
Its holding close to 22 psi by 7500. Redline is set at 8K. I am thinking about trying to add a little more WGDC at 6500 maybe 96% and run at 100% WGDC from 7000 to redline. If knock increase add a little more fuel or remove 1* if fuel does not help and check the chart again. Not sure if I should try a bigger spike on pump.
I have a set of PTE880 but have not install them yet. The stockers seems OK so far for pump. I am at about 95% IDC by redline.
I have a set of PTE880 but have not install them yet. The stockers seems OK so far for pump. I am at about 95% IDC by redline.
Last edited by racer135; Dec 17, 2009 at 03:45 PM.
Dec 21, 2009, 06:04 PM
#22
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Knock is being induced at 6250 by the 2 degree jump in timing which can be cured by smoothing the timing curve. I can get away with 15* up top on my stock turbo w/93 at 24psi so your timing is about where it needs to be. Power seems low but could simply be incorrect VDR settings. IMO if you know what to look for you will see a boost leak in a log IF you have before and after logs in very similar conditions by an increase in airflow at the same boost level. Either way, periodic boost leak tests are mandatory on turbo cars.
Dec 22, 2009, 05:40 AM
#23
Knock is being induced at 6250 by the 2 degree jump in timing which can be cured by smoothing the timing curve. I can get away with 15* up top on my stock turbo w/93 at 24psi so your timing is about where it needs to be. Power seems low but could simply be incorrect VDR settings. IMO if you know what to look for you will see a boost leak in a log IF you have before and after logs in very similar conditions by an increase in airflow at the same boost level. Either way, periodic boost leak tests are mandatory on turbo cars.
The only thing I can think off now is a boost leak. But honestly I do not think I have one. Everything else looks good. 350 is not a low hp car but is not a high hp either. I was expecting close to 360~365 on a DJ.
Dec 22, 2009, 09:51 PM
#24
Guess what. Tried to increase a little boost after 6000 rpms and got a lot knock (about 8 counts at some point). Airflow and boost profile basically stayed the same with the increased WGDC.
So I tried lowering the boost to 23 tapering to 22 in 3rd Gear and got an almost knock free run (1 count at the most in two back to back runs). Airflow was stilll the same with 1 psi less. Power increase a little also with 23 psi, not much maybe 3~4 hp at top. I have to superimpose the curves to compare the low end but its 2 AM. Maybe tomorrow.
I think the turbo does not like more than 23 psi up top because airflow was basically the same. Or the stock airbox is not letting more air in.
Flow in Lb/min was 41.5 and Airflow at about 2050 Hz bt 7500 rpms. Very interesting results. I am not sure if I should try 22 psi to see how much is the flow.
So I tried lowering the boost to 23 tapering to 22 in 3rd Gear and got an almost knock free run (1 count at the most in two back to back runs). Airflow was stilll the same with 1 psi less. Power increase a little also with 23 psi, not much maybe 3~4 hp at top. I have to superimpose the curves to compare the low end but its 2 AM. Maybe tomorrow.
I think the turbo does not like more than 23 psi up top because airflow was basically the same. Or the stock airbox is not letting more air in.
Flow in Lb/min was 41.5 and Airflow at about 2050 Hz bt 7500 rpms. Very interesting results. I am not sure if I should try 22 psi to see how much is the flow.
Last edited by racer135; Dec 22, 2009 at 10:11 PM.
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