RV8 mods?

34coupe · Post by **34coupe** » Sat Feb 03, 2007 2:08 pm

Hi Guys,a mate of mine has 2 RV8s,1 carb out of a j reg disco,1 efi out of L reg disco which is pre serpentine,both are 3.5s,what sort of power do these put out standard,also can he gain anything from mixing parts from the 2 engines or other RV8s,the engine will be fitted to a K reg Sierra Hatch Cheers Stu

Post by **katanaman** » Sat Feb 03, 2007 6:05 pm

Assuming they are both high compression engines they will be around 170bhp, need more info on them for a better figure. Not much point swapping parts around between the engines unless there is ware or damage on one of them. If it was me I would put a new cam in the EFI motor and if money allows a set of 9.75:1 pistons. This will easy bring the engine to around 200bhp or more depending on cam used.

34coupe · Post by **34coupe** » Sat Feb 03, 2007 7:24 pm

Cheers Marki,just found out after cleaning the EFI is a 8.35:1,looks like it has had wrong headgaskets fitted as there are holes in head for extra head bolts(14 as apposed to 10)the lower 4 bolts(near ex manifolds)are missing and no holes in headgaskets,engine no is 22DxxxxxxxD if thats any use Cheers Stu

34coupe · Post by **34coupe** » Sat Feb 03, 2007 7:27 pm

Sorry that should have said 8.13:1 Stu

Post by **katanaman** » Sat Feb 03, 2007 10:52 pm

is it using comp gaskets? If so the compression is even lower, well into 7. something. If the other engine is 9.35 then go with that and swap the efi over.

Eliot · Post by **Eliot** » Sun Feb 04, 2007 9:52 am

Ive recently finished reformatting and publishing a document all about modifying and tuning rover v8's - i'm not sure who originally wrote it (someone on here may know) - it was originally one massively long doc with no breaks or sections, but ive tried to break it down into managable chunks.
Get yourself a cuppa:
http://www.mez.co.uk/TuningTheRoverV8-intro.html

badger · Post by **badger** » Sun Feb 04, 2007 11:44 am

Excellent stuff there Eliot, would you mind if I copied and altered some parts from it for future inclusion on my own website?

Post by **katanaman** » Sun Feb 04, 2007 12:24 pm

just had a quick squint through that, some of it seems to be talking about the Buick version. Main bit that sticks out so far is the blue printing block liner part. The rover engine has never had cast in liners, they have always been shrink fit.

Geoff King · Post by **Geoff King** » Sun Feb 04, 2007 6:20 pm

Stu, Do you still want the 3.9 liners?

34coupe · Post by **34coupe** » Sun Feb 04, 2007 8:37 pm

Geoff,sent u a pm m8,my project is on stop at the mo due to lack of funds lol,had to buy a new pc,helping my m8 sort his V8 Sierra project,will ask him if he is interested.

eliot have saved that to my favs will get a flask and have a read.

Cheers Stu

ian.stewart · Post by **ian.stewart** » Sun Feb 04, 2007 8:39 pm

Someone looking for a low comp 3,5RV8 on the NSRA forum.