RV8 Engine Weight

[LS7427ci]

Sorry box's are G Force GSR 4 speed and G5R 5 speed both available with sequential shift GSR run a lot in NASCAR circle track racing and G5R in anything I also have a transaxle option with this box.

[Marquis_Rex]

cymtriks said:

The Rover V8 is not light weight, it tips the scales at circa 440lbs.

It's only light compared to the massive iron blocked stuff that was around when it was first designed, which is probably how the myth started. By todays standards it's down on power and overweight for its capacity.

This is something I posted a while ago:

"I'm tired of the hype surrounding the RV8 engine. Man, I've heard figures as low as 130 Kgs being banded about for its weight. It's a widely used readily available engine- and there's a lot of tuning knowledge out there for it (some of the tuning is questionable).
But lets put things into perspective here:

These are the true weights of a late Disco 4 litre engine, compliant with all the modern emissions and refinement criteria.

Accessory Drive Belt - (1) 0.341kg
Air Cleaner Body 0.977kg
Air Cleaner Element 0.299kg
Air Cleaner Top 0.467kg
Air Flow Meter 0.226kg
Air Hose/Duct - (1) 0.325kg
Alternator 7.196kg
Engine Complete 177.000kg
Engine Management - E.C.U. 0.390kg
Starter Motor 4.060kg
Viscous Coupling 2.942kg
Engine Oil 5.676kg

The above comes to 200 kgs. Now an earlier vehicle will probably NOT have the reduction gear starter motor fitted and so you can expect that to weigh about 8 kgs, the accessory drive won't be poly belt driven but individually driven So that will weigh quite a bit more. The above also does NOT include the flywheel, which on the Rover is very very heavy compared to it's contemporaries. So we're already looking at way over 220 Kgs. The extra capacity over the 3.5 litre will lose some in the crank area, but because the RV8 doesn't have a fully counterweighted crankshaft- not as much as you might imagine. The block has been reinforced since the early days, but I can't see that adding much more then about 5-6 kgs. So these silly figures of around 140Kgs are Science Fiction.
When folk start to pitch this motor, on function, against the Chevy C5 motor or a twin cam Jag, BMW, or Porsche V8s spending thousands upon thousands and seriously believing all the hype, they're on shaky ground. "

[rev-erend]

Nice post Marquis .. I looked for your earlier post but could not find it.

The flywheel weight is 14kg and can be lightened down to about 8kg.

[The Black Flash]

Thanks for all the info, one and all. That's put paid to the idea of an rv8 as an option for me; and if it is indeed over 200kg then a lot of other things start looking more appealing. I want something a bit more revvy anyway, so the v6 is looking the favourite at the mo.

[rev-erend]

The cosworth V6 can be bought very cheaply..

[LS7427ci]

No go with a LS1 or LS6 for the money to weight and HP's out will win hands down!!!!

[Boosted LS1]

rev-erend said:

The cosworth V6 can be bought very cheaply..

Two tubbies and it goes nicely. Being iron it weighs about the same as the lsx, well when I pick them up they feel bloody heavy Fords!

[Tony427]

The Black Flash said:

gofasterrosssco said:

Toyota / Lexus 1UZ-FE. 4L, 32v, quad-cam

Relatively light - circa 180kg (whats that, about 400lbs..?) Maybe scope for improvement by removing A/C and power steering units.

Standard 250hp, but easily tunable with reasonable aftermarket support (but nothing to RV8 or LSx levels)

Cheap as chips, but very durable

Sounds good even in standard form

Edited by gofasterrosssco on Sunday 15th June 02:54

I've looked long and oh so hard at the uzfe. They are perfect in virtually every way, except for the size of the damn thing. I've had discussions with Dax about fitting one, and although technically probably possible, it sounds as if bits of the heads would end up sticking out of the bonnet, which I don't really want.
Bloody shame though, I thought I was on to something there.

Another vote for the 1UZFE from me, although I am biased as I now have three of these wonderful engines, only one of which is actually in the original Lexus as the other two now reside in Cobras.

Stick an easily tunable Lexus V8 in the Dax, slap a Turbo/ Turbos or supercharger on the engine (or both), buy an earlier ( pre 94) engine with the thicker rods, and adapt the bonnet....... 400bhp, cheap as chips, bombproof and wonderfully smooth.

Cheers,

Tony

[The Black Flash]

Tony - I've read a lot of your old posts on the uzfe, and they do look like fantastic engines. Had my heart quite set on one for a bit. But it's not just a case of modifying the bonnet, I mean I'm all for a bit of protruding plenum (Oooer), it means major chassis modifications and I don't really want to change the look of the car that much.

[deetes]

A friend of mine hilclimbs and sprints a Dax Rush with a tuned Rover KV6 + sequential box. Not sure on the power output.

He can be contacted through this website. His name's Les.

http://www.mjengineeringscotland.ltd.uk/contact.ht...