1005 rwhp 03 C5...

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Dec 22, 2007 | 04:27 PM

#81

Carnutz

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From: Minnesota

Im in on the valve spring Issue.

Dec 22, 2007 | 05:37 PM

#82

Kaneman

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From: Las Vegas

I have been told on my car back pressure could cause this. I would think an 81 housing per side on your car would be fine though. The next thing would be to measure your back pressure so you need to get some kind of reading from the exhaust manifold side I beleive.

Kane

Dec 22, 2007 | 05:59 PM

#83

onfire

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From: Virginia

Quote:

Originally Posted by nick y

STILL THERE EVEN AT LOW PSI.....
i logged crank sensor and it appears to be working....
fixed two wires and gapped tr6 down to .28.........that shouldnt be a problem at low psi anyway

experts please take a look...see anything strange? i dont

Did it get any better with the changes at all?

Positive your wideband is accurate?

Did you throw a pressure tester on the valve springs just to confirm their pressure?

Dec 22, 2007 | 06:46 PM

#84

nick y

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From: bucks county pa

Quote:

Originally Posted by onfire

Did it get any better with the changes at all?

Positive your wideband is accurate?

Did you throw a pressure tester on the valve springs just to confirm their pressure?

no better... yeah WB is good....i have it on a narrow range on my chart display, so it looks jagged.....

no test v springs....i spoke with brian tooley.....said my spring should be ok...
test some mitshubishi coils on monday so.......

Dec 22, 2007 | 07:16 PM

#85

1BADAIR

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From: oxford, Michigan

what rockers??

Dec 22, 2007 | 07:56 PM

#86

nick y

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From: bucks county pa

Quote:

Originally Posted by 1BADAIR

what rockers??

yella terra...latest version

Dec 22, 2007 | 08:18 PM

#87

nick y

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From: bucks county pa

HEY, i am going to install mitso coils monday, should i edit any tables in my hp tuners?

dwell?

thanks!

Dec 22, 2007 | 09:32 PM

#88

onfire

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From: Virginia

Quote:

Originally Posted by nick y

HEY, i am going to install mitso coils monday, should i edit any tables in my hp tuners?

dwell?

thanks!

Shouldn't have to change a thing. Only way to tell if the correct valves/setup/etc is on the heads is a pressure tester...anything could have happened on the install....wrong height, defective springs......too easy not to rule out with a tester. Hopefully the pushrod length is correct also.

I hope it's bad coils for a quick fix.

Good luck.

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Dec 22, 2007 | 10:02 PM

#89

nick y

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From: bucks county pa

Quote:

Originally Posted by onfire

thanks Onfire,

i received an email from another C5 owner that reload his coils too and when the psi was cranked to 15 he too had issue @ 5600. putt'em back to stock and issue resolved. now that isnt to say that that was the issue but.....

ill pop off the v. covers and take a lookie. what procedure do u use to test?

thanks!

Dec 22, 2007 | 10:15 PM

#90

LS2Camaro

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From: Hawaii

Your inj Duty % really drops, really seems like some problem with fuel. Sorry if you mentioned it before but what specific components does your fuel system consist of, pump, are the 96 injectors flow matched? What size are the feed lines? etc.

Dec 22, 2007 | 10:35 PM

#91

Tiago

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From: HOUSTON-TX

not sure on the other details but I believe he mentioned twin walbros in the tank... they aren't going to go any further then 1000rw, you need to find a way to add the third or go to a real pump as they say

Dec 22, 2007 | 11:00 PM

#92

nick y

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From: bucks county pa

Quote:

Originally Posted by LS2Camaro

how do u figure? yeah duty % will do that when u close the throttle

persicion 95 and a third pump, external. 10 psi activated hobb switch.

Dec 22, 2007 | 11:02 PM

#93

nick y

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From: bucks county pa

Quote:

Originally Posted by Tiago

tiago

ahead of ya buddie

Dec 22, 2007 | 11:09 PM

#94

nick y

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From: bucks county pa

SORRY for huge pics!!!

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[/IMG]

Dec 23, 2007 | 01:13 AM

#95

LS2Camaro

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From: Hawaii

Quote:

Originally Posted by nick y

how do u figure? yeah duty % will do that when u close the throttle

persicion 95 and a third pump, external. 10 psi activated hobb switch.

Didnt know if that was due to you closing the throttle or if it was from fuel drop which is why I asked.

Dec 23, 2007 | 01:59 AM

#96

TT632

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From: Any dragstrip any time

My twin turbo alcohol motor was dropping out about 5000 rpm. Switched ignition sytems, wires and all of the usual things, to no avail. Spark was not able to jump the gap when boost came up. This is a very high compression motor with boost. Smaller plug gap fixed the issue. I have run into this on a couple of other 1000 RWHP combinations with High boost and or high compression/Nitrous where the smaller gap eliminated the problem.

Dec 23, 2007 | 08:35 AM

#97

nick y

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From: bucks county pa

Quote:

Originally Posted by LS2Camaro

Didnt know if that was due to you closing the throttle or if it was from fuel drop which is why I asked.

ITS COOL!

Quote:

Originally Posted by TT632

i hear ya.......i can see that and all but not w/7psi. i dropped gat to no avail

Dec 23, 2007 | 03:37 PM

#98

Tiago

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From: HOUSTON-TX

Nick, is that two pumps inside the tank feeding the third pump inline?

Dec 23, 2007 | 04:03 PM

#99

nick y

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From: bucks county pa

Quote:

Originally Posted by Tiago

Nick, is that two pumps inside the tank feeding the third pump inline?

no tiago........hehehehe......see the bulkhead? its feedin' the external....
see those other lines on the bulkhead are........

1) feed
2) sypione for passanger tank
3) return

Dec 27, 2007 | 02:18 AM

#100

chuntington101

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nick, first time i have sene the exhaust on. looks great!

any more luck with the new wires on there??

Chris.

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