madkaw

I thought the DP cam had a shorter duration which in turn would not be making power later than the Isky- but I’m guessing here. So the higher lift is killing the low end?

35$ hall sensor , DIY flywheel drilling- out of sight

Then the valve was defective if I understand the way it works correctly. And I believe the vent line goes to the valve - not the crank breather tube. Valid point about vent line being higher than tank for sure .

Actually - the way that valve works there is no direct air route from the PCV to the tank. What opens the vent valve is pressure build up from the tank. You can test the valve by trying to suck air thru it.

On my 71 , I ran the vent fitting on my Tank Inc in flex line all the way up front to the original vent valve on the fender .

Should of went high impedance injectors IMHO- would have mounted in with a Pallnet fuel rail easy. I know someone who has the dizzy if you need it. You are going like the MS once you get it going. Some good help available here

Damper Doc did mine years ago and guaranteed like 8 grand rpm and 400lbs torque . I’ve had no issues and it was about the same price.

Page 2 has some good discussion.

Might need to elaborate on this statement

How much for their rebuild?

Hell- if you willing to spend that money , buy one of Datsun Works heads and something truly special

I’ll give a nod to getting help from Chickenman and kits from Softopz to get you started. I think the GM coolant sensor will thread into the later thermostat housings that have 4 holes.

Damn- I thought my ISKY 490 was big league need to up my game !

This is why I don’t like MSA . POS product that doesn’t fit and they keep selling it. It was not machined properly PERIOD . Sent one back for the same reason - too small. There isn’t variances in tolerances on our engines - it’s just a bad product

Have you not checked the MS web site ?

It isn’t easy to do ( degree a cam) for most though. Maybe that small bit of advance built into the cam is for that crowd that doesn’t . I’d almost advise against trying if you don’t feel confident about the process. If somehow the user retarded the cam drastically , they could smack valves . On the other hand , if you use the stock sprocket and set it up just like stock , it’s unlikely you will have any issues or be far enough off to negatively affect HP by that much. I have been considering a whole tooth on my build , but it starts getting pretty hairy then😳

Might have left some HP off the chart. Timing is important especially comparing apples to apples . That’s all part of tuning !

Curious of what kind of ignition timing to we’re running ?

Not a simple answer to that. I had this motor apart a couple of times and shaved more off head each time but did NOT degree every time . I also changed induction systems from triples to single TB, so I’ve done some experimenting with valve timing . Advancement was to bring power band lower . i did advance to get numbers close the first time I degree’d the cam

If you set it up properly - it should be close enough. My head had been shaved considerably, so I winded up advancing the cam 8 degrees . Normally folks don’t get the exact numbers that are on the card because of factors like rocker arm ratio, etc..

Of course My Isky cam came with the wrong degree numbers and I couldn’t get it “dialed in”, so I would have been better off just setting it straight up -lol

Well- you can , but might be other factors. How much was shaved off the head? How old is your timing chain? I guess it all matters how Accurate you want to be.

I want thank Hussein ( Softopz) for all his help and good service in ordering his harness and MS ECU. He managed to a rush order for me and was able to cater to my set up . From someone who has already done a MS on my car , I know how intimidating the initial wiring can be . I strongly recommend this option offered by Softopz to get you going faster and with less frustration . Having someone that actually works in our cars can get you harness that fits right and works right . I was impressed to find out he does all this while being a family man with kids and works many hours on his job. His support after the sale has also been great and always answers pm’s . I would recommend him for this service . side note: Teaming up with Chickenman ( Richard) makes for a great knowledge base for hardware and software regarding MS .

You might want to check out the FAQ page here and look under L6 engines and find many discussions about the different cylinder heads and how to modify them. The info is here- but you’ll need to do your homework