Quote:
Originally Posted by 5ABI VT
I looked briefly for a fuel pressure gauge to tape to the windshield but am not sure what the fitting size is etc. is it the same as an LT1 ? The car never hesitated like that before (few runway events on YouTube I have have no lag whatsoever) I have a few videos I won't post because we were being naughty on the highways at night  but the hesitation was much more prominent. It still pulls decent with the hesitation but something is going on. |
I took a quick look and it looks like the LT1 and Lt5 fitting should be the same. I have no idea on what the fitting size is, all GM stuff was the same, my gauge came with the correct size.
Used on everything GM from 1991-2012.
Description
"Fuel Rail Pressure Relief Valve Distributor-Breakerless
ignition"
US$18.26
GM p/n 12570619
This thread throws around some possible sizes.
http://www.zr1.net/forum/showthread....=fuel+pressure
Whatever your issue is, the engine sure recovers quickly afterwards. I can totally understand thinking it might be a clutch issue.
After much digging, I found a thread that specifies the correct un regulated or WOT fuel pressure of 50.76 psi. So if you find 51 psi plus or minus 1 psi at WOT your golden. It was tpepmeie who reported the actual LT5 fuel pressure of 50.76psi. At 50.76psi of fuel pressure, the stock injectors will flow 22.14 lb/hr and at 43.5psi they would flow 20.5 lb/hr.
This is the thread where I was referencing Mark Haibecks info.
http://www.zr1.net/forum/showthread.php?t=14739
