Performance V8 4 ltr engine.

[DonkeyApple]

Vixpy1 said:

Is there an off the shelf SC kit avail for the 3.9 in a classic? I don't really mind if the engine sts itself

It's a non serp engine isn't it?

A chap has built a kit for Tivs. Iain something.

V8GRF has all the details.

[seeryj]

Its not a TVR engine.
This was a Dyno result when first built.
Did have it on a Dyno recently but was too light and powerful for the dyno to give a reading.
It kept climbing out of the rollers and also spinning up.
I need to take it to one that uses the direct hub drive.

I know that the TVRs are getting more than this.

[DonkeyApple]

I don't think TVRs get anywhere near to be honest. Few will be over 300 bhp.

[Sarge 4x4]

Still chewing the fat but looking like Rover 4ltr the best direction, we are stuck with this size to stay inside the rules as someone stated.

As we are in a production class the Rover V8 is looking the right choice and around 300bhp and 300ft lb torque will work fine with the Quaife 6 speed sequential box.

This is for a brand new Defender 110 we have in build at present.

Thanks for your help as i have no experience with the Rover V8, someone mentioned "flat plane crank" or something like that, your thoughts please.

[DonkeyApple]

I've not heard of a flat plane crank for an RV8 but it might exist.

I think you'll be spending an enormous sum to get the power to that sort of level you mention. A not inexpensive 5L build would be getting those numbers.

[300bhp/ton]

Sarge 4x4 said:

Still chewing the fat but looking like Rover 4ltr the best direction, we are stuck with this size to stay inside the rules as someone stated.

As we are in a production class the Rover V8 is looking the right choice and around 300bhp and 300ft lb torque will work fine with the Quaife 6 speed sequential box.

This is for a brand new Defender 110 we have in build at present.

Thanks for your help as i have no experience with the Rover V8, someone mentioned "flat plane crank" or something like that, your thoughts please.

I think you need to speak to some of the engine builders. A genuine 300hp and 300lb ft from a 4.0 litre, I reckon that might be a tall order. That's sort Works Team world rally type engines used in the 1980's... Can't see it being cheap.

[DoubleByte]

My 4.2 does 315, but it did take a bit of work i guess. Main thing for me was upping the CR, the rest is all bolt on bits - carefully fitted!!!

[C Lee Farquar]

seeryj said:

John Eales at JE Engineering is the best .

I race one of johns 5 litre Rover V8s.
Only 390bhp so not tuned to hell.
The engine is very reliable and gives massive torque.

Didn't he leave over 20 years ago?

[cirks]

300bhp/ton said:

390hp from a Rover V8. Suspect a mortgage was involved
Do you have a dyno for it? Not doubting, but that seems a very high amount for an RV8. And certainly when you view the rolling road results in the TVR forum, few of them really make BIG numbers, no matter what's been done to them, or who built them.

No reason to doubt John's stated output. Mine's a John Eales lump too but just a 'mere' 4.8 and that's 320bhp with medium heads - could have gone for more power when built but would have been even more money and less drivable on road. Mine was built for my spec of needing to be usable on road and high torque 330+ on track etc.

[Sarge 4x4]

What about the Merlin heads ?
Does anyone have any experience with flat plane engines ?

[C Lee Farquar]

Sarge 4x4 said:

Does anyone have any experience with flat plane engines ?

Your navigator

[Sarge 4x4]

Mmmmmmmmmmm, that was a Lexus.

I need if poss some info on the Rover V8.

[C Lee Farquar]

I'll take a wild guess a Rover would be similarly expensive to build and maintain.

Would be an interesting project though. I did look at this for the LS to try and reduce the capacity but it did look fairly ruinous and the probable need for balance shafts seemed more complicated than I wanted to deal with.

[Clivey]

RicksAlfas said:

Never used them, but heard a lot about them and seem to be well respected on other forums:
http://rocketsledtuning.webs.com/aboutus.htm

I can vouch for them. - Stuart's a personal friend and has done quite a lot of work on my Disco 2 TD5.

[DonkeyApple]

Clivey said:

I can vouch for them. - Stuart's a personal friend and has done quite a lot of work on my Disco 2 TD5.

Morning Clive. Spoke to Stuart last week, after seeing your post. That was a conversation that has opened a can of worms!

[Clivey]

DonkeyApple said:

Morning Clive. Spoke to Stuart last week, after seeing your post. That was a conversation that has opened a can of worms!

I can only imagine!