Ben's 87 Sigma Highroof - With Mods! (Pic Heavy)

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Re: Ben's 87 Sigma Highroof - With Mods! (Pic Heavy)

Postby brichman » Fri Dec 11, 2015 1:14 pm

Thanks for the help everyone :) As you can all see, i'm still learning about all of this.
I'll upload a photo of the sump when I get it back from the welder guy!
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Re: Ben's 87 Sigma Highroof - With Mods! (Pic Heavy)

Postby Sigmaproject » Sat Dec 12, 2015 11:47 am

Got the pic to work...This is the measurement that determines if you have a narrow or wide block as far as gearbox compatibility goes. This measurement is the same for both Astron I and Astron II
If it is 330mm then you have a wide block
If it is 310mm then you have a narrow block.
These measurements and only an issue if you have a gearbox failure..and you need to chase up a another box.


]Image
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Re: Ben's 87 Sigma Highroof - With Mods! (Pic Heavy)

Postby Sigmaproject » Sat Dec 12, 2015 11:48 am

Got the pic to work...This is the measurement that determines if you have a narrow or wide block as far as gearbox compatibility goes. This measurement is the same for both Astron I and Astron II
If it is 330mm then you have a wide block
If it is 310mm then you have a narrow block.
These measurements are only an issue if you have a gearbox failure..and you need to chase up a another box.


]Image
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Re: Ben's 87 Sigma Highroof - With Mods! (Pic Heavy)

Postby stealth » Sat Dec 12, 2015 2:22 pm

260mm across the sump is narrow block
Wide is 280mm
Cheers stealth
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Re: Ben's 87 Sigma Highroof - With Mods! (Pic Heavy)

Postby brichman » Sun Dec 13, 2015 3:44 pm

Sweet! Cheers guys :)

Some more updates / progress photos

Image
Image
Image
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Re: Ben's 87 Sigma Highroof - With Mods! (Pic Heavy)

Postby brichman » Wed Dec 16, 2015 1:49 pm

Just got a call from the exhaust shop, she's ready to be picked up! Saying that i'm excited to pick it up this afternoon is a massive understatement!

:D :D
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Re: Ben's 87 Sigma Highroof - With Mods! (Pic Heavy)

Postby brichman » Thu Dec 17, 2015 8:15 am

Alrightey, so things are going well and the car isn't running too bad. The new exhaust has made it sound so much tougher!

At the moment it's running the wastegate pressure (5Psi), and i'm getting pininging under load at 4k revs.

I've richened up the fuel mixture a bit, and I've decided that this means that the timing is too far advanced.

I've read around the place that setting a static timing would be the best for my application, which would involve something about wiring the centrifugal weights? If anyone has some more knowledge on this matter, or an opinion on how I should time it, speak up :D
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Re: Ben's 87 Sigma Highroof - With Mods! (Pic Heavy)

Postby mstrrab1992 » Thu Dec 17, 2015 4:51 pm

Are u using stock ecu
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Re: Ben's 87 Sigma Highroof - With Mods! (Pic Heavy)

Postby Sigmaproject » Fri Dec 18, 2015 6:28 am

If you are using stock ignition..then you need to get a boost/retard canister fitted to your dizzy. They will re-graph it at the same time. I got mine done at Scortcher in Victoria. :thumpsup:
http://performanceignition.com.au/
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Re: Ben's 87 Sigma Highroof - With Mods! (Pic Heavy)

Postby Scorpma82 » Fri Dec 18, 2015 7:31 am

Scorcher is the place to go for dizzy work

My ol' man went to get his XY dizzy rebuilt....everywhere he went...he was directed there
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Re: Ben's 87 Sigma Highroof - With Mods! (Pic Heavy)

Postby brichman » Fri Dec 18, 2015 7:53 am

Awesome! That's something I can follow up. Cheers once again guys!

I also need new front shocks, I reckon i've read somewhere that early commodore ones fit with some minor modification to the existing towers? If so, that's awesome!
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Re: Ben's 87 Sigma Highroof - With Mods! (Pic Heavy)

Postby brichman » Mon Dec 21, 2015 1:22 pm

Image


Getting there :) It sounds absolutely amazing!
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Re: Ben's 87 Sigma Highroof - With Mods! (Pic Heavy)

Postby mstrrab1992 » Mon Dec 21, 2015 7:23 pm

Looking good. Keep up the good work
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Re: Ben's 87 Sigma Highroof - With Mods! (Pic Heavy)

Postby brichman » Mon Jan 04, 2016 3:36 pm

Well, she's off to go get finished off a Graham West Automotive here in SA. Should be all tuned up and completed in the next week or two!

I'll post results when I get it back :D
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Re: Ben's 87 Sigma Highroof - With Mods! (Pic Heavy)

Postby brichman » Tue Feb 09, 2016 9:09 am

So things have been going slower than expected, but the work is now being commenced.

The turbo was absolutely done, so that's in for a full rebuild - much more than the bearings and seals that I replaced.
The turbo oil drain has been made larger to ensure no blockages/restrictions.

Distributor will be modified by the workshop - they seem to have a really good idea of what they're going to do :)


Will update with dyno sheet when she's tuned, hopefully by mid next week. Made 65kw atw before the work commenced (H)
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Re: Ben's 87 Sigma Highroof - With Mods! (Pic Heavy)

Postby A112H » Tue Feb 09, 2016 7:49 pm

Graham West is a great workshop with heaps of experience. They have been tuning and building turbos and drift cars since importing began in earnest.
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Re: Ben's 87 Sigma Highroof - With Mods! (Pic Heavy)

Postby brichman » Thu Feb 11, 2016 10:09 am

All i'm hoping is that it is back on the road in time for All Japan Day :)
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Re: Ben's 87 Sigma Highroof - With Mods! (Pic Heavy)

Postby brichman » Wed Feb 17, 2016 8:41 am

Well I've got it back :)

https://www.youtube.com/watch?v=9PAbBavD4ZI

104kw on 7psi after correction. Not bad! Considering it had 65 before it left, that's a massive power increase. Very noticeable!

And I must credit Everlast Mufflers at Modbury, SA, for their work on the exhaust. It sounds absolutely mental :p

I've got some aesthetic mods planned before All Japan Day here in SA (28/2) so I'll update with photos of that :D
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Re: Ben's 87 Sigma Highroof - With Mods! (Pic Heavy)

Postby mstrrab1992 » Wed Feb 17, 2016 12:30 pm

Awesome dude! That's pretty neat on gas
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Re: Ben's 87 Sigma Highroof - With Mods! (Pic Heavy)

Postby leoca64 » Tue May 24, 2016 12:34 am

Great , how'd the All Jap day go .

Hey , as I will probably be doing a similar job , i was just wondering why they didn't suggest the car be intercooled .
Also have you any idea of your engines compression ratio?.

Thanks !
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Re: Ben's 87 Sigma Highroof - With Mods! (Pic Heavy)

Postby brichman » Tue May 24, 2016 9:50 am

leoca64 wrote:Great , how'd the All Jap day go .

Hey , as I will probably be doing a similar job , i was just wondering why they didn't suggest the car be intercooled .
Also have you any idea of your engines compression ratio?.

Thanks !


Hey! Yeah, it went really good. A lot of interest in the car :)

It most probably could have been intercooled, and it is one of the things that is near the top of my list of things to do. I didn't worry about it at this stage as I wanted to keep things as simple as possible, and with needing to run a balance line for the lpg converter, an intercooler may have made that harder. It wasn't too much of an issue as i'm only running 7psi. If I were to go any higher, it would definitely get a cooler.

Compression ratio, I honestly dont know. I'd say its just the standard Astron 2 ratio. If you were doing this on petrol you'd notice a significantly larger power figure!
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