Powerforum

nogen der ved om topstykket på en granada 2.9 motor type BRC (86-93) har 3 udstødnings porte?...

og er der nogen der ved om man kan tage det topstykke og montere på en XR4I 2.8 motor?... snakker med gutten der købte min tidligere sierra XR4I turbo og han vil gerne have et lækkert udstødnings system på som spiller istedet for det gamle latterligt opbygget som sidder på...

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Ikke at kunne eller gide gennemlæse regler fritager ikke folk fra at skulle overholde dem om de bliver opdaget eller ej...

Where excess pressure is involved in a system - inadvertent opening of elements under stress can lead to parts flying around...

www.RavenZ.dk

Fra www.burtonpower.com :

Basically, the 2.9 unit is a longer stroke version of the 2.8, but there are also other subtle differences between these two engines, which makes any interchange of parts very difficult. The 2.8 cylinder head has a 2 port siamese exhaust manifold design as against the more conventional (and better) 3 port design on the 2.9. Like the Essex engine, the 2.8 V6 had the same type of cam drive gear design and the same associated problems. The 2.9 has a much more reliable chain drive for the camshaft. The 2.8 engine can be tuned to a reasonable level (modified cam, staged heads, steel cam gear, etc.) but the poor cylinder head design is its ultimate restricting feature. The American version of this engine was fitted with 3 port heads but such items can be difficult to source in the UK. For those wishing to convert their 2.8s into 2.9s be warned, it is not easy and it is not cheap. Because of the different exhaust porting the camshaft phasing is different (they also rotate in opposite directions to each other). The 2.9 distributor, oil pump and drive shaft will also be required. The differences in the chain and gear drives means that, if you fit the 2.9 crank in the 2.8 engine, the front nose will require modifying. And because of the longer stroke crank, the pistons will protrude approximately 1.5mm above the deck face. The piston crowns can be machined down but this will affect their ultimate strength, especially if the compression ratio is to be raised.

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Lille problem, lille hammer. Stort problem, stor hammer!

Fri bane, fuld hane!!!

takker...

men der står jo ikke at det ikke kan lade sig gøre... kun at resten af motoren er lidt anerledes opbygget men ikke at man ikke kan tage topstykkerne fra 2.9'ern og montere på 2.8'ern

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Ikke at kunne eller gide gennemlæse regler fritager ikke folk fra at skulle overholde dem om de bliver opdaget eller ej...

Where excess pressure is involved in a system - inadvertent opening of elements under stress can lead to parts flying around...

www.RavenZ.dk

Har lige kigget i deres katalog. Det jeg citerer er fra web og 2005 katalog. I 2006 katalog står:

The 2.3 and 2.8 are significantly different since they feature Siamese port heads, fibre-teeth cam gear and shorter stroke. In contrast, the 2.9s cam is chain driven in the opposoite direction and features 3 port heads.
In practical terms, you either tune one engine or the other - you can´t fit 2.9 heads on a 2.8 because the cam phasing is different amongst many other parts - conversion is therefore difficult. However, you can fit the 2.9 crank in the 2.8 block although the nose at the front will need machining to accept the cam drive.

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Lille problem, lille hammer. Stort problem, stor hammer!

Fri bane, fuld hane!!!

hmm det er "DIFFICULT" men ikke umuligt... kan ikke se hvad cam phasing skulle give af problemmer den ligger jo alligevel i blokken og skulle jo gerne passe til krumtappen som den hele tiden har gjort... nogen der har sådan et par hoveder liggende man kan komme og studere (på begge sider af broen)...

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Ikke at kunne eller gide gennemlæse regler fritager ikke folk fra at skulle overholde dem om de bliver opdaget eller ej...

Where excess pressure is involved in a system - inadvertent opening of elements under stress can lead to parts flying around...

www.RavenZ.dk

På 2,9 er der byttet om på rækkefølgen af ventilerne, i forehold til 2,8 - hvis 2,8 motoren er nyere end 86 skulle 2,9 knasten passe i 2,8 blokken(før 86 er lejrne på knasten anderledes), og så skal man kun tilpasse knastdrevet, da 2,9 har kædetræk og 2,8 tandhjulsdrev

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Mvh Kenneth

Alt under 800Nm burde være 2 takt

ahh okay... takker... har sendt et par forespørgsler afsted til usa da deres udgaver skulle have de 3 porte istedet på deres udgaver... så håber der er en af dem der melder tilbage med nyt...

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Ikke at kunne eller gide gennemlæse regler fritager ikke folk fra at skulle overholde dem om de bliver opdaget eller ej...

Where excess pressure is involved in a system - inadvertent opening of elements under stress can lead to parts flying around...

www.RavenZ.dk