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  1. #1
    Do you ever leave? HPE PETE's Avatar
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    Default ole school HPE 350 build

    with heaps of builds on the go i really dont have time to keep them up to date on here ATM till i catch up a bit but this build here is a little different and will happen over some time and its a project a mate of mine will help out with, basically another mate had purchased all these parts for a 350 he was going to do a home build on but he ended going in another direction and offered the whole lot to me at a good price. basically everything is brand new except for the block

    so heres the plan originally we were going to build it, engine dyno it and put it in the shop HT wagon but plans have changed for that car so we are just going to build it dyno it and sell the engine, its also a little project a mate of mine dan is going to help out with when he comes in for half a day on fridays and helps out around the shop, i dont have time to get started on it myself and i havent had a chance to show him a full engine build from start to finish as the engines we do get worked on through the week he so he does miss out on seeing an engine build from start to finish, i will show him how to do the basic block prep etc and some of the component prep work then we will assemble it once all the prep work is done.

    its a bit of an old school type build, solid flat tappet, factory style alloy head, solid flat tappet, team g intake etc, back in the day it would have been a pretty common type build.

    its a 350 factory 4 bolt block with all the parts pictured below, the block was .030 over and came with a set of dome top .040 over hypers but unfortunately someone had been at the bores with a ridge remover and it didnt clean up at .040 so unfortunately i had to buy some .060 over pistons so i got a set of mahle forged 5cc dome tops 1.125 pin to go with the 6.125 rods and 3.48 crank which i am just going to buy a new scat 9000 series crank rather than grind this one 20/30.



    the rods are pro comp 6.125 H beams, i wouldnt use these in a big dollar build but the power level this engine will make they will be fine and will be more overkill than anything else, i will put ARP bolts in them but the rest of the machining has measured up good.



    heads are edelbrock e street heads 185cc runner with a 70cc chamber hence the dome top piston, and will be ported and machined, i have 2.02/1.600 valves for it but i may have some 2.05's i can put in them, im going to have to give these a fairly extensive port job if we want to make reasonable power 450+, chamber isnt that nice so we will make some improvements there as well





    intake manifold is a brand new weiand team G single plane, its a pretty small intake but should work well with this size engine and cylinder head size, i will give this intake a port job as well, so the engine will have a lot of little tricks that normally cost a fair bit of money so it will be good value for money but i have to do it if we want to make ok power




    camshaft is a Crower solid flat tappet with the specs below, similar to a crane 288 so also true to the ole school theme



    its even got a brand new weiand alloy water pump


  2. #2
    Do you ever leave? HPE PETE's Avatar
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    so far the block has had all the main caps welded and machined to fit in the registers nice and tight, then line bored and line honed to size,

    bores have been bored to suit new mahle forged pistons, these are a 2618 forging so it runs around .005 clearance, should be able to beat on this thing fairly hard with good pistons H beam rods and 4 bolt block providing tune is good which is why we dyno every single engine we build even ones we are selling, as you all know a bad tune up and you could break anything no matter how good your parts are.

    block was mocked up with crank, piston and rod and measured on all corners






    and then decked for zero deck height.

    so this is where its up to, fri dan had the task of doing some block deburring and detailing, we still have to tap for threaded plugs in the gallerys and check rod clearance then chamfer bores and lifter bores etc then the block work is complete


  3. #3
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    Great to see you back Pete and as always, bloody great thread

  4. #4
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    It's great to see you posting some stuff Pete, this looks like it should be an interesting project. I hope you're doing well and the hands are good.

  5. #5
    Part of the furniture gtrboyy's Avatar
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    This will be good just like engines used to see get built as a kid except cast fuelie heads lol

    Them aftermarket heads budget performance or factory replacements?

  6. #6
    Do you ever leave? HPE PETE's Avatar
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    thanks guys its a little different to your average modern sbc build and considering the stuff we normally build for some reason i am really looking forward to this one.

    heads are edelbrock e street and compared to most aftermarket stuff out there which are pretty good these days and a little more modern design these are pretty agricultural and really do need some work to resemble a performance head so i almost feel as handicapped as a factory head, maybe thats part of the challenge, i think we can put a reasonable port into these castings but its going to be a bit of work
    Last edited by HPE PETE; 01-04-2018 at 10:05 PM.

  7. #7
    Do you ever leave? HPE PETE's Avatar
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    Quote Originally Posted by JaseQ314 View Post
    It's great to see you posting some stuff Pete, this looks like it should be an interesting project. I hope you're doing well and the hands are good.
    thanks jase allgood hands are hanging in there for now so going to beat on them as much as i can while i can, have u got the harley going with the new heads yet mate

  8. #8
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    Do you think there is too much shrouding on the intake valves? Are you intending on clearing the pushrod pinch as best you can?

  9. #9
    casual poster JaseQ314's Avatar
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    Quote Originally Posted by HPE PETE View Post
    thanks jase allgood hands are hanging in there for now so going to beat on them as much as i can while i can, have u got the harley going with the new heads yet mate
    It's good your doing well and the hands are hanging in there. I've got most of the bits together now, just need some motivation to work on it, you'll be the first to know when I do.

    I'll look forward to hearing some more about this build, it should be cool.
    Last edited by JaseQ314; 03-04-2018 at 09:46 PM.

  10. #10
    been here .......too long Smitty2's Avatar
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    Pete

    .. you ok if I sticky this thread?
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  11. #11
    Do you ever leave? HPE PETE's Avatar
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    Quote Originally Posted by Smitty2 View Post
    Pete

    .. you ok if I sticky this thread?
    not a problem smitty, for future reference no need to ask mate

  12. #12
    Do you ever leave? HPE PETE's Avatar
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    Quote Originally Posted by Castiron355 View Post
    Do you think there is too much shrouding on the intake valves? Are you intending on clearing the pushrod pinch as best you can?
    besides any shrouding the chamber is a really basic bath tub design and is really flat in the roof around the valves which doesn’t help pressure recovery, right from the valve seat inserts which are also really flat and into the chamber so there is very little top cut above the seat basically we want the top cut to extend smoothly into the chamber instead of just going 90 deg into the chamber, one way of helping fix this is to cut the seats deeper and widen the top cut which should also help low lift flow......anyway see what happens when we get that stage, hopefully get a flow test done on these in totally stock form in the next few days with stick valves so we have a baseline to work with

  13. #13
    Do you ever leave? HPE PETE's Avatar
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    what i think will be an interesting comparison is this engine to the 457hp early head 355 we built last year, similar cam similar compression and rngine size although the 355 only had a 225cfm head, id like to achieve similar results with this engine which will have more air flow but a 23 deg combustion chamber with a dome top piston for similar comp

  14. #14
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    I see what you mean by the combustion chamber design. Interested in the final result compared to the 355. I have read that dome tops can negtively effect chamber efficiency as well. Time will tell. Awesome stuff.

  15. #15
    been here .......too long Smitty2's Avatar
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    Quote Originally Posted by HPE PETE View Post
    not a problem smitty, for future reference no need to ask mate
    ... thanks, done !
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