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PostPosted: Mon May 18, 2020 9:25 pm 
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Full Pressure Turbo

Joined: Fri Jun 16, 2006 9:26 pm
Posts: 661
That valve does look big! Especially next to the standard exhaust valve.
Are you hoping to get bigger exhaust valves in as well? Looks like a limiting factor will be when the valve seats clash.

Can't remember what size your throttle bodies were, will you have to go up a size to get the most out of this engine?


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PostPosted: Tue May 19, 2020 8:30 am 
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Saab Nut
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Joined: Thu May 05, 2011 4:39 pm
Posts: 1450
Location: Auchindoun, Moray, North east Scotland
Car Model: Saab 99 T16 project
Very good read so far, thanks for sharing. Will this be built into the same car?

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1974 99EMS
1972 4dr 99
1970 2dr 99
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PostPosted: Tue May 19, 2020 8:46 am 
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UKS Addict

Joined: Fri Aug 05, 2005 6:51 pm
Posts: 2795
Location: Near Liverpool
Car Model: Saab 900 and 99
99 Pete wrote:
That valve does look big! Especially next to the standard exhaust valve.
Are you hoping to get bigger exhaust valves in as well? Looks like a limiting factor will be when the valve seats clash.

Can't remember what size your throttle bodies were, will you have to go up a size to get the most out of this engine?


Bigger exhaust valves are needed with the 46mm inlets, standard size exhaust valves are enough for the 44mm inlets. There is room for them.

The Jenveys are 45mm, these will be OK for this engine also, they are still within range.

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900i '87
900T '81
99 '83 TurboKiller
99 EMS '77
Lancer EVO 6 TME '00 red
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PostPosted: Tue May 19, 2020 8:47 am 
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UKS Addict

Joined: Fri Aug 05, 2005 6:51 pm
Posts: 2795
Location: Near Liverpool
Car Model: Saab 900 and 99
ianlaw wrote:
Very good read so far, thanks for sharing. Will this be built into the same car?


Yes, its going into the same car.

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900i '87
900T '81
99 '83 TurboKiller
99 EMS '77
Lancer EVO 6 TME '00 red
Lancer EVO 6 TME '00 black


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PostPosted: Tue May 19, 2020 8:55 am 
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Put a SOC in it!
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Joined: Mon Feb 07, 2005 4:48 pm
Posts: 21925
Location: Fliptop Towers, Trumptonshire
Car Model: One or two...
I recall many, many moons ago, Dave Walker writing in his Triple C column about getting Pintos to similar power levels. It was around the time he started out on ECU mapping and Emerald really took off. Might be worth hunting them out, although clearly some aspects have moved on significantly since then. Not least the sophistication of management systems to control timing and fuelling.

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9-5 Aero ~600Nm FB3
Sonett III
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PostPosted: Tue May 19, 2020 9:06 am 
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UKS Addict

Joined: Fri Aug 05, 2005 6:51 pm
Posts: 2795
Location: Near Liverpool
Car Model: Saab 900 and 99
Fliptop wrote:
I recall many, many moons ago, Dave Walker writing in his Triple C column about getting Pintos to similar power levels. It was around the time he started out on ECU mapping and Emerald really took off. Might be worth hunting them out, although clearly some aspects have moved on significantly since then. Not least the sophistication of management systems to control timing and fuelling.


It is currently running a DTAS40 ECU, perfect for this set up.

Although pinto type valves can be used on the Saab head, they have to be modified. The port configuration on the Pinto is quite different to the Saab.

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900i '87
900T '81
99 '83 TurboKiller
99 EMS '77
Lancer EVO 6 TME '00 red
Lancer EVO 6 TME '00 black


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PostPosted: Thu May 21, 2020 8:25 am 
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UKS Addict

Joined: Fri Aug 05, 2005 6:51 pm
Posts: 2795
Location: Near Liverpool
Car Model: Saab 900 and 99
If I do go with the 2.5 block, the exhaust manifold may need to be altered. There are larger manifolds available.

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900i '87
900T '81
99 '83 TurboKiller
99 EMS '77
Lancer EVO 6 TME '00 red
Lancer EVO 6 TME '00 black


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PostPosted: Thu May 21, 2020 9:13 am 
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Full Pressure Turbo
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Joined: Tue Sep 10, 2019 11:14 pm
Posts: 860
Location: N Yorks
Car Model: 9-5 Aero Estates, 9000 Aero
Fliptop wrote:
..... although clearly some aspects have moved on significantly since then. Not least the sophistication of management systems to control timing and fuelling.


Indeed, I had an ECU swap done one one of my cars, went I think from 8 bit to 32 bit granularity, no mechanical changes. Same guy doing the custom map on rollers

Peak power up 10%, fuel consumption improved 10%


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