Joey Mack Posted December 7, 2022 Share Posted December 7, 2022 Sorry 'F'... I'm really not trying to correct you, And your info is correct for the Jacobs 690 Brake heads after Updates like top oil feed and Armoly reset screws.. It did go from .015'' - .017'' - then to .021".. jojo Quote Link to comment https://www.bigmacktrucks.com/topic/70801-cylinder-pressure-out-intake-port/page/6/#findComment-517590 Share on other sites More sharing options...
Mark T Posted December 7, 2022 Share Posted December 7, 2022 I remember setting the E7 at .080 Quote Link to comment https://www.bigmacktrucks.com/topic/70801-cylinder-pressure-out-intake-port/page/6/#findComment-517591 Share on other sites More sharing options...
Joey Mack Posted December 7, 2022 Share Posted December 7, 2022 Yes sir,, wasnt the setting for the jakes based on the turbo part number?? I have done a few but am not a pro. I remember taking 2-3 feeler gauges together, and checking each side of the funny looking piston.. I do not own the E-7 feeler gauge tools.. I think the lashes were .040'', .060'', & .080''... I sure am glad I have service manuals.. Quote Link to comment https://www.bigmacktrucks.com/topic/70801-cylinder-pressure-out-intake-port/page/6/#findComment-517593 Share on other sites More sharing options...
fjh Posted December 7, 2022 Share Posted December 7, 2022 On 12/7/2022 at 12:16 AM, Joey Mack said: Sorry 'F'... I'm really not trying to correct you, And your info is correct for the Jacobs 690 Brake heads after Updates like top oil feed and Armoly reset screws.. It did go from .015'' - .017'' - then to .021".. jojo Expand all good bro don't remember all 1 Quote Link to comment https://www.bigmacktrucks.com/topic/70801-cylinder-pressure-out-intake-port/page/6/#findComment-517600 Share on other sites More sharing options...
Joey Mack Posted December 7, 2022 Share Posted December 7, 2022 I get it... I'm loosing My E-7 knowledge lately... I need to read the book again.. Just sayin'.. Quote Link to comment https://www.bigmacktrucks.com/topic/70801-cylinder-pressure-out-intake-port/page/6/#findComment-517602 Share on other sites More sharing options...
fjh Posted December 7, 2022 Share Posted December 7, 2022 On 12/7/2022 at 12:37 AM, Joey Mack said: Yes sir,, wasnt the setting for the jakes based on the turbo part number?? I have done a few but am not a pro. I remember taking 2-3 feeler gauges together, and checking each side of the funny looking piston.. I do not own the E-7 feeler gauge tools.. I think the lashes were .040'', .060'', & .080''... I sure am glad I have service manuals.. Expand Ha Ha And 85 With stealth brake gottcha back! 1 Quote Link to comment https://www.bigmacktrucks.com/topic/70801-cylinder-pressure-out-intake-port/page/6/#findComment-517603 Share on other sites More sharing options...
Joey Mack Posted December 7, 2022 Share Posted December 7, 2022 Touche' Quote Link to comment https://www.bigmacktrucks.com/topic/70801-cylinder-pressure-out-intake-port/page/6/#findComment-517605 Share on other sites More sharing options...
fjh Posted December 7, 2022 Share Posted December 7, 2022 On 12/6/2022 at 11:59 PM, Joey Mack said: ;F;.. I think you are thinking about the E-Tech?? I believe he has an E-7........... Expand yup thats why I was flying it don't recall on the 7 its still a dam press fit cam gear! I hated doing these! Quote Link to comment https://www.bigmacktrucks.com/topic/70801-cylinder-pressure-out-intake-port/page/6/#findComment-517606 Share on other sites More sharing options...
Mark T Posted December 7, 2022 Share Posted December 7, 2022 I think it's a different cam from the 350s to the 400+ engines in those. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/70801-cylinder-pressure-out-intake-port/page/6/#findComment-517612 Share on other sites More sharing options...
fjh Posted December 7, 2022 Share Posted December 7, 2022 On 12/7/2022 at 2:40 AM, Mark T said: I think it's a different cam from the 350s to the 400+ engines in those. Expand You could be Right Bro! I hated it when they changed to push on cam gears At the time I wondered with all the issues we had with lifter failures etc Why would you change to a more complicated repair system ! What could be easier than 4 bolts to change a cam gear! I used to do alot of bush work and it made things more complicated when u had to fly in to camp to fix shit! Quote Link to comment https://www.bigmacktrucks.com/topic/70801-cylinder-pressure-out-intake-port/page/6/#findComment-517649 Share on other sites More sharing options...
ChallengeDave Posted December 7, 2022 Author Share Posted December 7, 2022 On 12/7/2022 at 2:40 AM, Mark T said: I think it's a different cam from the 350s to the 400+ engines in those. Expand Just checked impact and PAI to compare the two motors. The 350 I used as a core, used the same camshaft and keyway as the 427 I built it as. I used another truck we have that has the 427 for all the spec info for this build. So at this point I still need to double check cam timing for the heck of it, and pump timing. Also am going to see what its going to take to mount the larger CH intercooler. Currently, the machine shop is going through and rebuilding the heads again, this time replacing the intake valves as well. They seem to be eating a bunch of the cost for this as a sign of good faith. Quote Link to comment https://www.bigmacktrucks.com/topic/70801-cylinder-pressure-out-intake-port/page/6/#findComment-517660 Share on other sites More sharing options...
fjh Posted December 7, 2022 Share Posted December 7, 2022 On 12/7/2022 at 4:46 PM, ChallengeDave said: Currently, the machine shop is going through and rebuilding the heads again, this time replacing the intake valves as well. They seem to be eating a bunch of the cost for this as a sign of good faith. Expand That's awesome news! I believe you'll find the CAC you have as adequate for the HP your shooting 4! In my opinion Check it for boost leaks after you assemble ! Check the pump timing as your saying AND If you can drive the thing your self! I firmly believe the heat theory is wrong but that's Me! The intake valves don't wear that fast and can't see heat affecting them in this short time period ! At least they are coming to the party! Good sign! also thanks for cross-referencing the cam I really couldn't remember if e7 had and off set Key that's how bad the memory is getting! GETTING OLD! and I know it! Quote Link to comment https://www.bigmacktrucks.com/topic/70801-cylinder-pressure-out-intake-port/page/6/#findComment-517664 Share on other sites More sharing options...
ChallengeDave Posted December 7, 2022 Author Share Posted December 7, 2022 On 12/7/2022 at 5:18 PM, fjh said: That's awesome news! I believe you'll find the CAC you have as adequate for the HP your shooting 4! In my opinion Check it for boost leaks after you assemble ! Check the pump timing as your saying AND If you can drive the thing your self! I firmly believe the heat theory is wrong but that's Me! The intake valves don't wear that fast and can't see heat affecting them in this short time period ! At least they are coming to the party! Good sign! also thanks for cross-referencing the cam I really couldn't remember if e7 had and off set Key that's how bad the memory is getting! GETTING OLD! and I know it! Expand PAI does show a listing for an offset keyway pat no. EKY-3179, mack 54GC29. Does not show application for that keyway besides it being for the E7. Also to add, they only list one cam for the E7 non Etech. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/70801-cylinder-pressure-out-intake-port/page/6/#findComment-517675 Share on other sites More sharing options...
D,Perkins, Austech Engines Posted April 15 Share Posted April 15 Why not check cam and crank correlation intake opens at tdc Any earlier and it would push out the intake! Quote Link to comment https://www.bigmacktrucks.com/topic/70801-cylinder-pressure-out-intake-port/page/6/#findComment-573722 Share on other sites More sharing options...
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