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Old 03-08-2007, 02:42 PM   #26
bboy
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Very cool. I'm happy to see the Supertech pistons. Did you have those custom made? I've eyed them myself. They have a substantial second ring land and the skirts look pretty short. You have to let us know how they sound on start up.

Even though you don't see them, the black looks so nice.
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Old 03-09-2007, 02:31 AM   #27
3.2L AWD Turbo
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Mmmm...A sweet-sounding six. This is a build!!!
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Old 03-09-2007, 09:30 AM   #28
My-STI-Rules
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Default RPM Question

Jeff,

In your opinion, what is "safe" max RPM limit with a built bottom end & built head for an H6 for a car that would see a days of track duty at a road racing?

Also, what is the rod ratio with these new rods?
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Old 03-09-2007, 10:37 AM   #29
White 2.5rs
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Jeff-
What did you have to do to your wife to have her allow you to build that thing on the table?!
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Old 03-09-2007, 10:52 AM   #30
zavier
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^ this thread might get locked if he tells you :P
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Old 03-09-2007, 02:06 PM   #31
sponaugle
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Quote:
Originally Posted by My-STI-Rules View Post
Jeff,

In your opinion, what is "safe" max RPM limit with a built bottom end & built head for an H6 for a car that would see a days of track duty at a road racing?

Also, what is the rod ratio with these new rods?
As far as safe RPM, I haven't really determined the limit. So far I have been reving to 7k, but I am probably not going much beyond that given the stock bearing surfaces are smaller on the H6 crank... and the H6 crank is thinner then the 2.5L one.

The rods are 5.180" long, and the stroke is 3.149", so the rod/stroke ratio is 1.64, just about the same as the EJ255/257. I do have new valve springs which should help push things, but the crank may be the limiting factor.

Quote:
Originally Posted by White 2.5rs View Post
Jeff-
What did you have to do to your wife to have her allow you to build that thing on the table?!
Well, before I had the engine parts on there I was using the table to rebuild my SKS and AK47, so I think the engine parts were an improvment.

Cheers!

Jeff Sponaugle
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Old 03-09-2007, 03:46 PM   #32
White 2.5rs
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Quote:
Originally Posted by sponaugle View Post


Well, before I had the engine parts on there I was using the table to rebuild my SKS and AK47, so I think the engine parts were an improvment.

Cheers!

Jeff Sponaugle
Hah works for me. Please, PLEASE, tell me you're taking advatage of Oregon's gun laws..and that is a TRUE 47...
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Old 03-09-2007, 04:13 PM   #33
ride5000
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sexy buildup!
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Old 03-11-2007, 07:42 AM   #34
SPOOLN STI
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Sweet build and nice details. Gotta love subie porn!
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Old 03-11-2007, 01:02 PM   #35
My-STI-Rules
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Quote:
Originally Posted by sponaugle View Post
As far as safe RPM, I haven't really determined the limit. So far I have been reving to 7k, but I am probably not going much beyond that given the stock bearing surfaces are smaller on the H6 crank... and the H6 crank is thinner then the 2.5L one.

The rods are 5.180" long, and the stroke is 3.149", so the rod/stroke ratio is 1.64, just about the same as the EJ255/257. I do have new valve springs which should help push things, but the crank may be the limiting factor.
Jeff - Thanks for the info & I greatly appreciate it!

Another question/thought, in your opinion after building a couple of H6s IF a new billet crank was used with larger bearing surfaces instead of a stock crank , could you get a H6 to spin safely and reliable to 8k or 8.5k?

Could you create a create a crank big enough to accept the 2.5 bearings?

Thoughts?
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Old 03-12-2007, 02:37 AM   #36
SparkysJDMSpeedWagon
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Quote:
Originally Posted by sponaugle View Post
I'll post a link to a vid in a bit.
Patiently waiting!
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Old 03-12-2007, 12:53 PM   #37
sponaugle
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Quote:
Originally Posted by My-STI-Rules View Post
Jeff - Thanks for the info & I greatly appreciate it!

Another question/thought, in your opinion after building a couple of H6s IF a new billet crank was used with larger bearing surfaces instead of a stock crank , could you get a H6 to spin safely and reliable to 8k or 8.5k?

Could you create a create a crank big enough to accept the 2.5 bearings?

Thoughts?
Well, the crank could be made beefier, but it would be challenging to make the surface area bigger as the case would be the limiting factor. The rod faces are the same size, but the case faces are smaller. So without making your own crank case, the best option would be the use a stronger material in the crank itself.

I think the guys at Cobb may have a new crank for the H6.. Not sure but there are rumors.

Given the rod/stroke ratio and the stock vs bore, I would assume that with proper oil control you could rev to 8k. Perhaps some mods to the oil system and the crank however. I will get my new motor broken in and then see how it performs at higher RPM.

Cheers,

Jeff
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Old 03-12-2007, 01:15 PM   #38
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How is that 07 gearing swap to prior years 6speed coming along?
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Old 03-13-2007, 04:11 PM   #39
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still waiting on the vid..
wow im so glad that this is going in a bugeye..
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Old 03-14-2007, 12:07 AM   #40
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nice thread
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Old 03-14-2007, 10:55 PM   #41
sponaugle
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If anyone has any ideas/suggestions about what tire/wheel setup to use at subiefest, comment away:

http://forums.nasioc.com/forums/show...6#post17359276


Jeff
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Old 04-04-2007, 11:09 PM   #42
myliberty
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The crank is big enough to accept the 2.5L big end bearings. just.

I used 2.5L big end bearings and had custom argo rods made to suit.
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Old 04-05-2007, 02:40 PM   #43
sadRS
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insane build!!
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Old 04-09-2007, 09:33 AM   #44
WRX4eva
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Beautiful work~
Can't wait to see when you are 100% finished.
I'm glad you got permission to work at your dinner table. Couple of years ago, when I put together my RC Kyosho inferno together, I almost got kicked out of the house. Imagine what would have happened if I brought an engine. LMAO. Good work.

Steve
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Old 04-09-2007, 12:15 PM   #45
IllNastyImpreza
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what are you goals for this car? you have any new pics?
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Old 04-10-2007, 12:22 PM   #46
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Very nice Jeff.

I will be in the 6cyl. world soon, but they will not be aposed, and i am planning on putting em in a RS coupe.
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Old 04-13-2007, 12:00 AM   #47
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Quote:
Originally Posted by Token-Negro View Post
How is that 07 gearing swap to prior years 6speed coming along?
I second that, how is everything working out?
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Old 06-05-2007, 11:44 AM   #48
kiefer
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Any updates on this project??
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Old 06-07-2007, 03:57 PM   #49
cdigerlando
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Default Your Build is similar to my build

Jeff:

I am in the process of doing a build up on an EG33. I have CP pistons (lower compression 8.5:1), Eagle H-beam rods, cams, valves, springs. I haven't decided or purchased bearings yet. When you installed your pistons, did you install one of the circlips first, then install the second after the piston and pin is in place? Just curious because I will be doing this soon. Thanks and I will keep tuned in. Wish the EG33 ran a timing chain instead of a belt.

Thanks

Chuck D.
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Old 06-07-2007, 07:34 PM   #50
cdigerlando
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Default One other thing

Have any of you 3.0 builders considered sleaving, deck closing, or semi-closing?
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