THE ROVER SD1 FORUM

yonexsp · Posted: Sun Jul 15, 2007 3:36 am Post subject:

If you did that, using thinnner gasgets, what else would you have to change? So the engine does not got Poof!!!

v8man1 · SD1 User Joined: 01 Mar 2007 Posts: 149 Location: kent

well having done a lot of v8s i dont think your have to do anythink really as both the engine and the heads are standard, if you want to be carefull put the the composite ones on mate up to you really,

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rover tp vitesse my dads old car!!!
discovery 3.9 es,

yonexsp · Posted: Sun Jul 15, 2007 3:56 pm Post subject:

An earlier poster wrote:

"measure lifters preload and also fit some shims under rocker shaft mounting"

Is this a pian to do? and is it necessary?

v8man1 · SD1 User Joined: 01 Mar 2007 Posts: 149 Location: kent

well i have heard of people peeple putting those heads on 35 40 42, as long as you got standard cam shaft i dont see any problem mate

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rover tp vitesse my dads old car!!!
discovery 3.9 es,

v8man1 · SD1 User Joined: 01 Mar 2007 Posts: 149 Location: kent

i found a bit of info for you mate not much but have a look<
A post SD1 engine fitted with 10.5 pistons a 3.9 camshaft an SD1 exhaust system & 4.6 heads will put out a fair chunk of power from stock, but with a drop in torque at lower revs

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rover tp vitesse my dads old car!!!
discovery 3.9 es,

yonexsp · Posted: Mon Jul 16, 2007 3:34 pm Post subject:

That drop in Torque is probably because of the CAM.

So any estimayes on HP for a 3.5, with 4.6 Heads and a Hotwire EFI? with standard CAM etc,

rover v8 · SD1 User Joined: 27 Feb 2007 Posts: 103 Location: Finland

yonexsp wrote:

That drop in Torque is probably because of the CAM.

So any estimayes on HP for a 3.5, with 4.6 Heads and a Hotwire EFI? with standard CAM etc,

I will estimate 215hp and over 320Nm Very Happy

Bacause my ex 3,5 flapper will make std 3,5heads and std vitesse cam 210hp and 311Nm

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Timo..