skyhighsami

iTrader: (8)

I think I have a low oil pressure issue with my motor in my HD. It has the LQ4 in it, I know the CR is lower in the because of the heads having a 72cc and the pistons being dished. What I am thinking it having the heads milled, and getting a -2cc dish. That would get the CR closer to the 10.5 range with a 68 or 65cc head. My question is how good would the heads flow with a mild port and polish job and have them decked. Or, would a set of 243s be better with less money in them. I will swap the pistons, and a better cam once I find out exactly what the issue is. I was told the oil pressure sensor was bad, I bought a new one and replaced it last night. The oil pressure is still showing low. I am going to check the pressure at the filter and then at the sensor. Does anyone else have any clues as to what it might be. I know I got off topic and if I need I will start a seperate thread but thought I could kill 2 birds with one stone. Thanks

trever1t

iTrader: (14)

the 317's flow as well as the 243's from what I understand.

thunder550

iTrader: (70)

Yep The main difference is just the chamber size.

Can you give some specifics about the oil pressure problem?

skyhighsami

iTrader: (8)

I am going to have a friend check the oil pressure at the filter and check the pressure at the top of the motor. I bought the truck from Mike at Vengeance and he said that they put a mechanical gauge on it and it had good pressure. I thought the sensor was bad, so I bought a new one and replaced it last night. I am still not getting a solid reading on the dash. Mike seems to think it is either the wire between the sensor and the ecu or the ecu and the dash. I will have more info about it tomorrow. I have put 4k miles on it since I bought it with no problems. It it strong and burns no oil. It has 60k miles on it if that matters. It has a cam in it with hardened push rods and Comp 928 springs. It has a little vavletrain noise but I thought it was the stiffer springs more than anything.

skyhighsami

iTrader: (8)

If I do have to build the motor I will just port these heads and get new pistons. I hope I don't have to, because by doing that it pushed my Camaro futher back or forces me to rush and not give it the attention to detail I would like. Thanks for the help guys, any input is awesome

InchUp

iTrader: (2)

I am so glad people are finally realizing this.

454SuperSport

if your talking about the 03' model listed in your sig it's probably the stepper motor in the guage cluster.

skyhighsami

iTrader: (8)

But it shows pressure it just does't show the right amount. Could it still be the problem?

thunder550

iTrader: (70)

It's possible....the stepper motors in those have issues sometimes. That's how I got this pic, lol. It's still showing speed, just not the right speed.

icedenali

03 clusters have factory recall. mine stayed at 10mph.


as far as 317 heads i got mine ported from WCCH i love it every sec of my ride. never had problems with it. with ported head and zo6 cam truck should pick up atleast 50whp.