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Location:
Brisbane
Registered:
October 2002
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Re: 8psi extra, 10rwkw extra?
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Tue, 19 July 2005 10:48
 
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there are ways to get the springs out and in without removing the head, u will need a WST 009
u also have to pressurise the cylinder, u can buy connectors with a 1 way valve in them that attach to your compressor air line, they screw into the spark plug tube and pressurise the cylinder, make sure the piston is at TDC, so when it pressurises it doesnt spin the engine downward, it also helps if the valve happens to fall, it wont fall all the way to the bottom  .
NOW.....once u have the cams/buckets off, get a 14mm socket, sit it over the spring so the collets are inthe middle and the socket is hiting ONLY the retainer, and give the valve retainer a tap {to loosen the spring from the collets}, THEN move the piston to TDC {if its at TDC when u hit the spring, u may bend a valve against the piston} . then use the WST 009 and push down ont he spring with all your might, if the valve moves too {u will hear all the pressurised air escape out the port} then back off and let the cylinder re-pressurise, give it a rap with the socket again if needed {shouldnt do, unless the engine is all gunked up with shit} once u have the WST pushed down enough as to be able to access the collets, get a helper to remove them, an ABW extendable pen magnet is very useful here, then pull the spring out, u should then let the air escape from the cylinder then, so it doesnt spin the motor, yes, the valve will fall, but as long as the motor was at TDC then it will only fall a few mm,
get them checked
when u put it back together u will be able to retrieve the spring with the magnet, make sure the cyl is at TDC, keep holding the valve, if u have one exhaust and 1 intake out from the same cylinder, get someone to hold the other valve with some needlenose pliers while u sue the magnet, just incase when u pressurise it and it spins downward, they wont fall.
Now once its pressurised, put the spring in, then use the WST to push it down and slip the collets in,
Once the springs are in, get a small tool that u can sit on the end of the valve so it doesnt hit the retainer or collets, now give it a small tap to ensure its sitting right
then re-assemble
if anyone can add any tips to help young chris here with the above procedure, then by all means let me know.
Phil
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Location:
Perth
Registered:
July 2003
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Re: 8psi extra, 10rwkw extra?
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Tue, 19 July 2005 11:05
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Chris,
if you need to rip the valves out have a look at:
http://www.mkiv.com/techarticles/valve_stem/index. html
I was going to use this if I ever get around to replacing the stem seals on my 1J.
I hope you get to the bottom of this soon!
Regards
Peter
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Location:
Brisbane
Registered:
October 2002
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Re: 8psi extra, 10rwkw extra?
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Tue, 19 July 2005 11:33
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i always wondered what the rope was for, damn logic 
if that guy ever bothered to change his oil he wouldnt have had to change the stem seals 
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Location:
sunny coast, qld
Registered:
October 2002
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Re: 8psi extra, 10rwkw extra?
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Tue, 19 July 2005 21:52
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Thanks for the guide Phil. I hope I don't have to do it but if I do that will be helpful as well as that link Peter posted.
My plan is to fix boost controller installation, fit MV shift box, get wolf doing timing. Retune. If no change, then it is just abot certain to be valve springs. Just want to try easy stuff first and also actually know what the timing is doing.
Here are some vids to listen to if you want. Vid is crap as it is from phone but sound is ok.
http://rapidshare.de/files/3190464/dyno1.3gp.html
http://rapidshare.de/files/3190485/dyno2.3gp.html
Click on free and then wait 30secs or so and the link will appear. Run in quicktime and you will need latest codecs.
later
chris
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Location:
sunny coast, qld
Registered:
October 2002
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Re: 8psi extra, 10rwkw extra?
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Wed, 20 July 2005 02:36
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Just rang MV and they won't have any shift controller boxes in for another 4 weeks. Hmm...
Also rang Hardcore and had a chat. The guy was saying that valve float isn't a real common thing with 1/2jz's and that they have only ever upgraded valve springs when going to larger cams.
Also, gave me a different spark plug to try NGK PFR7B gapped to .9mm.
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Location:
Osama's hideout
Registered:
February 2003
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Re: 8psi extra, 10rwkw extra?
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Wed, 20 July 2005 02:41
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| Chris Davey wrote on Wed, 20 July 2005 12:36 |
Also rang Hardcore and had a chat. The guy was saying that valve float isn't a real common thing with 1/2jz's and that they have only ever upgraded valve springs when going to larger cams.
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that right, not till 272 cams.
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Location:
sunny coast, qld
Registered:
October 2002
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Re: 8psi extra, 10rwkw extra?
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Wed, 20 July 2005 03:01
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Also on Jun 264's and greater. I thought it was more related to the lift rather than the duration.
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Toymods Social Secretary
Location:
Sydney
Registered:
July 2002
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Re: 8psi extra, 10rwkw extra?
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Wed, 20 July 2005 04:38
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this question is answered in one line.
"You are running the standard ECU to control ignition timing"
Once your wolf or other PROGRAMMABLE ECU is looking after ignition timing, i think you will be more than happy with your deicision to do things properly.
std ecu doing timing with a wolf on top.... EWW!!! An emanage would be doing a better job!!
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Location:
sunny coast, qld
Registered:
October 2002
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Re: 8psi extra, 10rwkw extra?
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Wed, 20 July 2005 04:43
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Well I hope that is the case. Unfortunately, I won't be able to find out for another 4 weeks.
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Location:
Osama's hideout
Registered:
February 2003
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Re: 8psi extra, 10rwkw extra?
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Wed, 20 July 2005 05:21
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| Chris Davey wrote on Wed, 20 July 2005 13:01 |
Also on Jun 264's and greater. I thought it was more related to the lift rather than the duration.
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thats correct.
hks 264s are 9.08mm lift. the 280's hard core use are 23mm or something of lift, awesome.
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Location:
sunny coast, qld
Registered:
October 2002
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Re: 8psi extra, 10rwkw extra?
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Wed, 20 July 2005 05:31
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| 1JZ.747 wrote on Wed, 20 July 2005 15:21 |
| Chris Davey wrote on Wed, 20 July 2005 13:01 |
Also on Jun 264's and greater. I thought it was more related to the lift rather than the duration.
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thats correct.
hks 264s are 9.08mm lift. the 280's hard core use are 23mm or something of lift, awesome.
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WTF! 23mm lift! That is crazy. No wonder their cars make so much power.
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Location:
Osama's hideout
Registered:
February 2003
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Re: 8psi extra, 10rwkw extra?
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Wed, 20 July 2005 05:34
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ask bruce at hard core to have a look at the stage 3 head
its unstreetable, but i would put in the the cressie, not rego it and run 8's.
the lobes are about 8 mm higher than the journals.
i was drooling like homer simpson when i was looking at it.
$5500
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Location:
Central Coast, NSW
Registered:
February 2005
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Re: 8psi extra, 10rwkw extra?
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Wed, 20 July 2005 05:37
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why is it unstreetable?
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I supported Toymods
Location:
I renounced punctuation
Registered:
May 2002
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Re: 8psi extra, 10rwkw extra?
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Wed, 20 July 2005 05:38
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Unlikely to be 23mm lift. You are physically limited by the retainer hitting the valve stem seal at about 15mm (on a 2JZGE). Also the cam lobes hit the bucket bores when you have 11+mm lift on the standard base circle, necessitating relief work. I can't imagine another 12 mm taken out of the head right there. I also can't envisage a cam bucket big enough to accomodate that lift fitting in the head there.
Did you mean 13mm? This actually is possible.
The standard springs coil bind at about 9.5mm lift which is why most guys don't upgrade springs (almost all the off the shelf cams seem to have 9.3mm or less lift). Also, seated pressure is something light (42 lbs from memory). Add some serious boost - let's say 25 lbs - and suddenly your seated pressure is only 17lbs. Combine that with big rpm (>6000) and you can be assured to have valve float.
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I supported Toymods
Location:
I renounced punctuation
Registered:
May 2002
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Re: 8psi extra, 10rwkw extra?
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Wed, 20 July 2005 05:45
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Here's a pic of my 2JZGE head with my 11mm lift cams. As you can see the cam lobe sticks out a mile from the cam journal.
With 11mm lift cams, you have about 30 thou clearance between the cam lobe tip and the rim of the bucket bore.
If I wanted more lift, it was suggested I bore out the buckets and fit 33 (later gen 3S)or 34mm (FJ20) buckets. I am having a long think about it.
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Location:
Osama's hideout
Registered:
February 2003
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Re: 8psi extra, 10rwkw extra?
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Wed, 20 July 2005 06:08
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its was in the 20's GT
they have them custom made, this head also comes with over size ferara valves, springs retainers port work in and around the valve as well as the port.
they hadnt tuned the car with it on yet, but their stage 2 head made a tad under 1000 rwhp. they were hoping to see around the 1250 rwhp mark.
i wouldnt doubt any thing they tell me as they have proved themselves on the track, and dyno. they are a top bunch of blokes.
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Toymods Social Secretary
Location:
Sydney
Registered:
July 2002
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Re: 8psi extra, 10rwkw extra?
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Wed, 20 July 2005 07:25
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yes you can... with an MA70 "ECT" computer as outlined by Alan if you have an A340E, or a crown or something else "ECT" computer if you have an A341E...... or so my dodgy theory goes!
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Location:
sunny coast, qld
Registered:
October 2002
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Re: 8psi extra, 10rwkw extra?
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Wed, 20 July 2005 07:28
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Aah yeah, forgot about that. I think I may try what Sean said about disconnecting the box and let it shift 1-3. I will take it easy. It just about does that anyway with a 4.6:1 rear end. I want to use the shift box in the end as I have always liked the idea of manualising the auto.
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Location:
Brisbane
Registered:
October 2002
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Re: 8psi extra, 10rwkw extra?
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Wed, 20 July 2005 08:16
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mayeb they have differnet ratio rockers witzl 
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Location:
sunny coast, qld
Registered:
October 2002
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Location:
sunny coast, qld
Registered:
October 2002
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Re: 8psi extra, 10rwkw extra?
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Sat, 23 July 2005 02:49
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leak down test results
1:5
2:7
3:7
4:12
5:7
6:6
Looks pretty good to me. That also matches up with the compression test.
Also checked timing marks and they are spot on.
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Location:
Adelaide
Registered:
June 2002
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Re: 8psi extra, 10rwkw extra?
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Sat, 23 July 2005 06:20
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Cool. All looks good mate. Pull the trans connectors off and get the Wolf controling the spark.
However, do not strap the line pressure cable out permanently as you may damage the trans when driving at light throttle openings. Strapping it out will not increase line pressure at WOT, only hold it at maximum at all throttle positions.
When you have the trans disconnected you'll still get third (1:1) which is the gear to be tuning in.
A question-You say you have a 4.6 or so diff. Have you calculated what RPM the motor will be doing at 125mph yet? My guess is that it may be a bit short. Have a chat to shane about what ratio he is running.
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