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jeff denham
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« Reply #630 on: January 02, 2009, 02:02:47 am » |
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deffenetly a true masterpeice. will it thunder soon perhaps? JD.
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promach
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« Reply #631 on: January 02, 2009, 02:11:27 pm » |
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We moved shop the week before christmas and have spent time getting all the house work done ready to start back on the 5th
but that has not stopped me from doning some work on the head ,will get some shots posted later today/tomorrow for everybody
Have been talking to Steve who just about ready to start flowing the second set of heads for us
Greg
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fine53
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« Reply #632 on: January 13, 2009, 01:18:22 pm » |
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Promach,
I've got to say it looks like a top notch job on the work. Are you going to run a turbo or normally aspirated?
You say your c/r is around 19:1 on alky ??The stuff likes compression.
BRE..BILL
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promach
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« Reply #633 on: January 17, 2009, 01:01:48 am » |
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Update
we have photos to post but are having problems doing so will give it a shot in the am
Greg
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promach
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« Reply #634 on: January 17, 2009, 02:17:20 pm » |
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Let's see if it's going to play ball
Have honed out the lifter bores made the locking screws to keep them straight in the bores
Greg
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promach
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« Reply #635 on: January 17, 2009, 02:42:08 pm » |
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here are a couple more shots
Greg
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Beetspeed
Junior
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Posts: 151
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« Reply #636 on: January 17, 2009, 03:18:31 pm » |
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From the picture of the inside of the lifter bores it seems like you use the locking screws on both sides? Is that correct?
Thanks for the pics. As I don't know V8 engines (which use the rollers more often), I learn a lot!
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2.2 ltr T4T 403 hp, 500Nm
G50 5-sp trans, DTA ec
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promach
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« Reply #637 on: January 17, 2009, 03:34:33 pm » |
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The locking screws are from one side only , the other hole you see is the oil hole
Greg
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Beetspeed
Junior
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« Reply #638 on: January 17, 2009, 05:16:56 pm » |
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Yes, of course, thank you!
The alu case has enough side load wear caracteristics for the heavy springs you will use? Was a silicon-bronze insert ever an option?
Do you know what your roller followers weigh?
Thanks!
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2.2 ltr T4T 403 hp, 500Nm
G50 5-sp trans, DTA ec
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drgouk
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« Reply #639 on: January 17, 2009, 05:27:54 pm » |
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Alot of the 4 cylinder speedway motors like the cesco mopar run the lifters staight in the alloy block and do not suffer wear, Cam buckets in OHC engines run on alloy in 1000's of production engine and 12,500rpm race motors such as the infinti IRL engines. Lubrication and design will determine the life.
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promach
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« Reply #640 on: January 31, 2009, 02:09:53 pm » |
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Update
Have made the oil pickups
The head is up on the mill right now ,have got the intake ports cut and are going to put in the spark plugs
will be posting photos later today along with a up date to those on the e-mail list
Greg
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promach
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« Reply #641 on: February 02, 2009, 01:51:56 am » |
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Here's the photos of the oil pickups as promised. Got busy machining the cylinder heads today, so excuse me for the delay in posting pics.
Greg
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promach
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« Reply #642 on: February 03, 2009, 12:39:46 am » |
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Have the head back off the mill
will need to make up a couple of valve seats/guides then can get the intake on to the flow bench ,photo's will be up just as soon as
Are currently work on the price for the engine
Greg
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« Last Edit: February 03, 2009, 01:32:30 am by promach »
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fine53
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« Reply #643 on: February 03, 2009, 05:53:00 pm » |
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Just a thought,but wondered why you don't use some tried and true off the shelf parts like cross linked Chevy or Mopar roller lifters ? It would save a lot of machine work and $$. The blown V 8 boyz don't seem to have any problems with them. What kind of compression are you going to put in it ?
BRE BILL
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promach
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« Reply #644 on: February 03, 2009, 07:44:21 pm » |
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I had some crower roller lifters that t didn't like how they located in the bore .These used two raised bosses on the side of the body
the way we have put the lower part of the block together does't allow us to use any "linked" lifters
Right now it looks as if the compression will add up to 19:1 with a flat piston in it
Greg
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promach
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« Reply #645 on: February 06, 2009, 01:42:50 pm » |
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here are those shots of the head from last week
Greg
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drgouk
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« Reply #646 on: February 06, 2009, 03:21:51 pm » |
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Looking good, Whats it like machining them from billet? take quite a while?
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promach
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« Reply #647 on: April 07, 2009, 01:48:49 pm » |
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Time to update on where we are at
Have been very busy here at work and haven't the time to do to much ,we have hired a manager to help with the work load and are buying another cnc mill to help get the work out faster
I did have the head back on the milll last sunday and plan to have it all finished this coming weekend
have the crank all modeled up for the big block at a stroke of 115.0 mm
all the parts have come in for the rockers
Greg
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58vw
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« Reply #648 on: April 07, 2009, 02:12:23 pm » |
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looking awesome..  |
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promach
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« Reply #649 on: May 11, 2009, 12:47:05 pm » |
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Update
Didn't get the head finished but it is very close to being ready to go out to be flowed
had it back up over the weekend and will post shots later today
We have ordered a new Okuma machining center
Have gotten a stock motor and are setting it up on the dyno to use as a mule
have started on the injectors
Greg
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promach
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« Reply #650 on: May 26, 2009, 10:10:19 pm » |
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Finally found some machine time over the weekend and managed to get the exhaust port machined out on one of our heads.
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melsbluebell
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« Reply #651 on: May 31, 2009, 06:10:00 am » |
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WOW time and money there....
Beautiful stuff.
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Yes its fast and no you cant drive it!
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promach
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« Reply #652 on: June 08, 2009, 06:39:27 pm » |
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The head is out getting the ports flowed , will have some numbers back in the next few days
This will allow us to get the cam profile done and get just that bit closer to running
Greg
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promach
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« Reply #653 on: June 09, 2009, 01:31:21 am » |
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First numbers on our second head is it is pulling 322 cfm @ .800" lift. and right at 300 cfm @.600" lift
Greg
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Ebug
Newbie
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Posts: 3
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« Reply #654 on: June 09, 2009, 06:39:32 am » |
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Great job on a fantastic looking head. Would like to see more pics if possible.
Can you share some of the details on the head such as valve size, Minimum Cross Section, Average Cross Section, and air speed over the short side radius?
What bore size are you going to run in the final engine configuration and at what bore size was the head flowed at?
I have always wanted to know how a really well tuned VW style head would stack up against a typical V-8 race head.
If you don't want to share that data openly, you can PM me here.
Thanks for your time and keep us all posted on the progress.
Rob
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promach
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« Reply #655 on: July 25, 2009, 05:28:39 pm » |
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Up date
We are still pluging away at this
will have the first head due back this week ,this model looks about 315 hp based on the early flow numbers
the head that is state side looks to be around the 345 mark
We had the spindle fail on the mill this took 4 wks to have repaired , has put us further behind but do have a new Okuma mill due in three weeks time
Have started putting in a dyno room
So by all counts we will have photos up this week
Have some very good video coming of some parts that Harry has been writing code for this will be posted on Pro Machining.com
Greg
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promach
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« Reply #656 on: July 30, 2009, 04:12:59 pm » |
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Have one head back
Donna took some photos and will post today , the head is gone back out so that we can have the port laser scaned
for us to reproduce
Steve who has our other head has been busy this week and gotten some good gains
294 @.500
313 @ .600
330 @ .700
348 @ .800
363 @ .900
He feels that there is more in this yet
Greg
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« Last Edit: July 30, 2009, 04:16:15 pm by promach »
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promach
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« Reply #657 on: August 30, 2009, 01:40:42 am » |
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Up date
Have spent the weekend working on machining the final model of the head ,plan is to have these already to bolt up in a week or three
The builders will be putting in the dyno room this week
As you can see we are still pluging away at it
Greg
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promach
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« Reply #658 on: November 15, 2009, 01:36:08 pm » |
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time for a up date
It has been a while since we last posted
have been very busy with keeping the shop up and running
got a new machining center at the end of august
we are here and working on the engine . Have had dyno room put in
heads will be on the motor this week ,have ordered all the ARP studs and are waiting for those to come in
need to be sending cam blanks out for grinding
are looking at taking on some more staff to free up my time, so that i can get this project finished
Greg
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promach
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« Reply #659 on: November 27, 2009, 01:07:28 am » |
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Up date
three cam blanks went out grinding this week
have got a good grind that will be put on the cam doctor to use as a base line. will need to
change this up to suit our rocker ratio and lifter setup and the flow data from the heads
Greg
it's time to add some photos
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promach
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« Reply #660 on: February 17, 2010, 10:29:42 pm » |
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Here's the photos I promised. Cam all done, ground and ready to rock and roll..
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fish26
Newbie
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Posts: 2
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« Reply #661 on: February 24, 2010, 10:44:08 am » |
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Hey Greg, thats awesome stuff you're doing there mate, keep it up hopefully we hear this beast come alive soon.
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promach
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« Reply #662 on: February 24, 2010, 02:37:43 pm » |
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Thanks
have been working this week on the injectors .
we don't have that much more to do..... problem is time and money aren't on the same page
if we stop to finish it the output of the shop comes up short ,
have a big project that we have 8 weeks to finish and we must be a little over half way into it and have on this thing for the best part of a year
We will have some more photos up later today/ tomorrow along with a new video of machining a crank which has some interesting moves in it
Greg
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promach
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« Reply #663 on: June 12, 2010, 10:09:50 pm » |
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we got our big project out the door a later then planned
this week will see us back into the engine ,got good news last week in that the head that is state side is finished and ready to be scanned with flow #'s up around 360cfm
offers plenty of promise
so need to get this done and running
Greg
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promach
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« Reply #664 on: August 22, 2010, 09:01:01 pm » |
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Well I"ve finally found some time to get a bit more done. Over the weekend I got to work on and complete the rocker covers. From billet aluminium of course. Will have pics to post of the fuel injectors once they get back from anodising.
Greg
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