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PostPosted: Mon Sep 07, 2020 2:50 pm 
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Full Pressure Turbo

Joined: Fri Jun 16, 2006 9:26 pm
Posts: 860
99 EMS wrote:
Most of the components on the 8v Saab engine are ridiculously heavy, reducing the weight of as many parts as possible with lighter modern quality parts is a good thing.
The standard conrod weighs in at 662g, the forged conrod I have weighs in at 510g, (both minus conrod bolts) a weight saving of 152g, multiply this by four and that's a total saving of 608g.

Standard 8v Saab conrod.
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Forged conrod.
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Are the forged conrods dimensionally the same as the standard rods or are they specials to go with your forged pistons and long stroke crank?


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PostPosted: Mon Sep 07, 2020 4:45 pm 
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Location: Near Liverpool
Car Models: Saab 900 and 99
They are exact copies of the standard rod I had made some time ago and they will accept standard pistons, the gudgeon pin bush will need to be altered to accept the Mahle forged pistons.

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900i 87
99 TurboKiller
99 EMS 77
Lancer EVO 6 TME red
Lancer EVO 6 TME black
GR Yaris 21 Red


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PostPosted: Mon Sep 07, 2020 5:09 pm 
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Full Pressure Turbo

Joined: Fri Jun 16, 2006 9:26 pm
Posts: 860
Again I expect I'm missing something but I'm assuming to get to 2.5 litre you must be using a crank with at least 90mm stroke? So with standard length rods won't this poke the pistons out the top of the block by 11mm? I realise you could get some of this back with reduced compression height on the new pistons but not 11mm surely?


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PostPosted: Mon Sep 07, 2020 5:23 pm 
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Location: Near Liverpool
Car Models: Saab 900 and 99
99 Pete wrote:
Again I expect I'm missing something but I'm assuming to get to 2.5 litre you must be using a crank with at least 90mm stroke? So with standard length rods won't this poke the pistons out the top of the block by 11mm? I realise you could get some of this back with reduced compression height on the new pistons but not 11mm surely?


Yes, my mistake, I'm still thinking in 2 litre, I will be using the forged 90mm rods.

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900i 87
99 TurboKiller
99 EMS 77
Lancer EVO 6 TME red
Lancer EVO 6 TME black
GR Yaris 21 Red


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PostPosted: Tue Oct 20, 2020 12:57 pm 
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Joined: Fri Aug 05, 2005 6:51 pm
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Location: Near Liverpool
Car Models: Saab 900 and 99
Custom camshaft has arrived from Catcams, along with springs, retainers and lash caps. Springs currently being adjusted for the correct seat pressure. Block is still in Sweden :lol:

Image

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900i 87
99 TurboKiller
99 EMS 77
Lancer EVO 6 TME red
Lancer EVO 6 TME black
GR Yaris 21 Red


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PostPosted: Wed Oct 21, 2020 8:55 pm 
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Full Pressure Turbo

Joined: Fri Jun 16, 2006 9:26 pm
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Looks like quite a wild camshaft, tarmac rally / race spec ?


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PostPosted: Thu Oct 22, 2020 3:32 pm 
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Joined: Fri Aug 05, 2005 6:51 pm
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Location: Near Liverpool
Car Models: Saab 900 and 99
Its a bit racier than what I have now, although the way the car currently runs with the DTAS40 etc I could have used more cam without sacrificing too much.
The new cam is a similar profile to what has been used in a 220 bhp Pinto engine.

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900i 87
99 TurboKiller
99 EMS 77
Lancer EVO 6 TME red
Lancer EVO 6 TME black
GR Yaris 21 Red


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PostPosted: Sat Feb 20, 2021 8:27 pm 
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Joined: Fri Aug 05, 2005 6:51 pm
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Location: Near Liverpool
Car Models: Saab 900 and 99
The modifications on the new cylinderhead are slowly drawing to a close.
The Catcam was sent back and a better base circle was added to the design.
Cam carrier needed some extra work, which is not unusual when fitting a cam like this.
Image
The Peugeot buckets have no dimple to help keep the shim in place, Saab shims cannot be used anyway with these buckets, lash caps need to be installed, this is more involved when adjusting the clearances, there is not much room for error!
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900i 87
99 TurboKiller
99 EMS 77
Lancer EVO 6 TME red
Lancer EVO 6 TME black
GR Yaris 21 Red


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PostPosted: Tue Jan 11, 2022 7:48 pm 
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Joined: Fri Aug 05, 2005 6:51 pm
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Location: Near Liverpool
Car Models: Saab 900 and 99
The 2.5 block/crank/pistons are still in Sweden, they will arrive someday, but in the mean time I want to get things moving.
94mm Ross pistons will be used in a standard H block, along with lighter H beam rods.

The big fat lass has gone on a diet.....

Saab 90mm standard piston/rod = 1.614g

Ross 94mm piston/H beam rod = 1.110g

Saving 504g.

x4 = 2.016g.

A total saving of 2kg of reciprocating mass is ridiculous.

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Attention to quality is great with these Ross pistons.
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Piston rings are always a good idea too :)
Image

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900i 87
99 TurboKiller
99 EMS 77
Lancer EVO 6 TME red
Lancer EVO 6 TME black
GR Yaris 21 Red


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PostPosted: Tue Jan 11, 2022 8:57 pm 
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Put a SOC in it!
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Joined: Mon Feb 07, 2005 4:48 pm
Posts: 21998
Location: Fliptop Towers, Trumptonshire
Car Models: One or two...
Looks good stuff, Dave.

What's the verdict on the GR Yaris? Toying with one of those to replace her ladyship's FN2 model CTR when she finally gets the ok to drive again...

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PostPosted: Wed Jan 12, 2022 8:07 pm 
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Joined: Fri Aug 05, 2005 6:51 pm
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Location: Near Liverpool
Car Models: Saab 900 and 99
Fliptop wrote:
What's the verdict on the GR Yaris? Toying with one of those to replace her ladyship's FN2 model CTR when she finally gets the ok to drive again...


I'm really glad I bought it, from when I first saw the car back in February 2020 at the Torsby service area at Rally Sweden, I knew it was something special and it didn't disappoint.
Fantastic car for two people, rear seats are for small people.
The waiting list is a long one for new cars and many will be disappointed, used ones are holding onto their value quite well.
Image

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900i 87
99 TurboKiller
99 EMS 77
Lancer EVO 6 TME red
Lancer EVO 6 TME black
GR Yaris 21 Red


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PostPosted: Wed Jan 12, 2022 10:17 pm 
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Put a SOC in it!
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Joined: Mon Feb 07, 2005 4:48 pm
Posts: 21998
Location: Fliptop Towers, Trumptonshire
Car Models: One or two...
Cheers Dave. There's no rush here and she's still waiting on the medical ok but at some point that uncomfortable rollerskate has to go, and I think the Yaris night be a good replacement 8)

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S6 Avant 4.0 V8T 450bhp/550Nm
9-5 Aero ~600Nm FB3
Sonett III
96V4s


Last edited by Fliptop on Thu Jan 13, 2022 9:43 pm, edited 1 time in total.

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PostPosted: Thu Jan 13, 2022 8:29 pm 
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Full Pressure Turbo

Joined: Fri Jun 16, 2006 9:26 pm
Posts: 860
Glad you're making progress even though it's a slight change in direction.
As discussed a few posts back the limit to maximum power on this project appears to be the cylinder head rather than the engine displacement so presumably you'll still see most of the power gain you were hoping for with the 'big' engine.
In some ways the shorter stroke engine might prove to be a better way to go. It'll be interesting to see when you do get the 2.5 engine done how the power delivery compares with the shorter stroke engine (which will be around 2165cc?).

Can the block be bored staight out to 94mm without problems? I thought I'd read somewhere that the B212 engines (93mm bore) had increased cyl wall thickness over the B202 engines but perhaps the older B201 engines have 'thick' cylinder walls anyway?


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PostPosted: Sat Jan 15, 2022 2:03 pm 
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Location: Near Liverpool
Car Models: Saab 900 and 99
I don't think I would notice much difference with the increased capacity and different stroke, back to back dyno runs would be best to see any benefits.

There are 3 types of H block used on the 99, the green and grey are of no use if you are going to a much larger bore. The red block is the one to use and has been proven to be more robust when bored out.

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900i 87
99 TurboKiller
99 EMS 77
Lancer EVO 6 TME red
Lancer EVO 6 TME black
GR Yaris 21 Red


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PostPosted: Sat Jan 15, 2022 9:55 pm 
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Full Pressure Turbo

Joined: Fri Jun 16, 2006 9:26 pm
Posts: 860
99 EMS wrote:
I don't think I would notice much difference with the increased capacity and different stroke, back to back dyno runs would be best to see any benefits.

There are 3 types of H block used on the 99, the green and grey are of no use if you are going to a much larger bore. The red block is the one to use and has been proven to be more robust when bored out.


That's interesting, I've sometimes wondered about the significance of the different block colours. I think I read somewhere that the grey blocks were made from a different grade of cast iron than the red blocks and were less prone to bore wear but I've never really taken it too seriously.

I suppose the red block came out about the same time as the B212 was introduced? Saab probably wouldn't have bothered casting different blocks for B201, B202 or B212. Red blocks introduced on all these MY 1990?


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PostPosted: Wed Jan 19, 2022 12:16 pm 
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Location: Near Liverpool
Car Models: Saab 900 and 99
The issue isn't so much the composition of the block, but the issue appears to be the actual casting quality, the later block was a better casting and doesn't lend itself to thinner walls when going beyond the oem spec for boring.

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99 EMS 77
Lancer EVO 6 TME red
Lancer EVO 6 TME black
GR Yaris 21 Red


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