cvx-18 exhaust

[Shrom CVX-18]

OK guys put new oil pressure unit on and ran it...after warmed up 5 psi at idle and 20-30 psi at 2000 rpms. Engine has no abnormal noise or knocking. Does this seem right psi range?

[carlsoncvx18]

Sounds right to me me!!!!

Mine will run 5-10psi at idle warmed up higher when cold.

At high rpm 3500 will run 40 to 45psi

As stated before mercrusier manual is 5psi  minimum.

Jeff

[Shrom CVX-18]

Sounds right to me me!!!!

Mine will run 5-10psi at idle warmed up higher when cold.

At high rpm 3500 will run 40 to 45psi

As stated before mercrusier manual is 5psi  minimum.

Jeff

Great then going to run her!

[CVX Fever]

Good to hear it was just the sender and nothing actually wrong w/motor Craig. Although You definitely had the right idea about just dropping a 5.7 in it, if it had been something major! .....LOL

[Shrom CVX-18]

Good to hear it was just the sender and nothing actually wrong w/motor Craig. Although You definitely had the right idea about just dropping a 5.7 in it, if it had been something major! .....LOL

 Yeah me too...saves me more work. Even though I was kinda excited about the idea of a 350 in there, I have been throwing around the idea of getting that 350 from Steve anyway, and maybe build a stroker out of it. and run what I have till its done. You got your Hatch screws on?

[CVX Fever]

Just did a test fit, haven't installed yet as I want to find a retainer so that they can't fall out of the hood when it is opened. A stroker would be really cool.

[Shrom CVX-18]

About ready to leave for another test run at the river... Just put "new" (to me) rims on the trailer

[Shrom CVX-18]

and once again 0 oil pressure after a while of driving it.

[wexrocks]

Just talked to Shrom, this is looking more like a 260hp upgrade all the time... we're gonna put the 350 out of the Scimitar on the stand and tear it down just to see (supposedly recently rebuilt), and if it looks good, there will likely be a few more ponies under Lowrider's engine cover.

We'll keep ya posted...

[Shrom CVX-18]

At this point my 305 will become my mooring anchor at the lake. Good conversation piece when people are watching me drop it in.

[Rosscoe]

Good visual on oil circulation and pressure with a seperate gauge....whats going on

[Shrom CVX-18]

Good visual on oil circulation and pressure with a seperate gauge....whats going on

After talking to Steve ( Wexrocks)  He brought up a good point. We think was found the problem. Not sure if you guys remember me saying about not showing any temp earlier in the forum. Well I fixed that problem and that is when the oil pressure started giving me problems once warmed up.

 I'm going to start with the Temp problem,   I realized that the whole problem with that was the engine never was getting hot, That being why the gauge not showing any temp. So I pulled the T-state house off and looked to see how everything flowed....Its was missing a sleeve in there that blocks the water flow till the t-state opened up. In turn never allowing the engine to heat up.

So to solve that problem I went ahead and purchase a new style t-state housing to go along with my manifold upgrade. Problem solved   It now showed temp.....But Now when the engine is heating up the oil pressure is going down to nothing. Steve and I believe that my bottom end is warn out and has took much clearences. So till the engine heats up it will show pressure.

[CVX Fever]

So Craig are you going to run it and see how long it lasts or just stick the 350 in it? What kind of oil pressure was it running last season? Seems funny that it would just drop to zero over the winter. The 350 transplant will be a fun project regardless. The difference between the 305 & 350 in these boats performance wise, is night and day. I only needed one ride in Jeff's CVX18 to figure that out!  

[Shrom CVX-18]

well, The pressure last season was near 40 psi, great pressure. But like I said that was when it was running cold all the time last season. LOL When I pulled the engine out over the winter I changed the oil/filter. For this season I am going to put thicker oil in it and run it and see what that does. If it has better pressure with the t stat in, Ill run it that way. Otherwise I will pull the T-stat and run it cold with good oil pressure. The 350 may or may not turn into a 383 stroker...I'll let that one be a surprise for when I try to come to the meet next year.  I'm hoping to get one more season out of the 305.

[Shrom CVX-18]

 Just a little update on what is gong on with Lowrider, I changed to thicker oil and put the 2brrl back on for this season. The 4brrl needs rebuilt and I just don't have the time for that right now. So I am going to run her the rest of the season back to stock and do the 350 swap and 4brrl in the fall.

[CVX Fever]

So I am going to run her the rest of the season back to stock and do the 350 swap and 4brrl in the fall.

Craig that's what I plan on doing with mine next winter. Last season w/305.