400 BHP N/A RV8

[Chilliman]

Anyone out there managed to get 400 horses out of a naturally aspirated 5 litre RV8? I guess some of the Tuscan race cars achieve this but I'm thinking of something that's still public road friendly...

Be muchly interested to know the spec if anyone has...

Cheers,

Chilli

[GasMunkey]

Feeling left out?

[Chilliman]

Nope

[Kokkolanpoika]

I have..

But it is emission legal 5.2litre street engine..



Uploaded with ImageShack.us

5.2litre
Compression ratio 11.8
Home modded Rover heads with stage 4 valves (flows 172cfm @0.45-0.5")
home made 4-1 exhaust manifold with 41.5mm primary pipe
home made 2x2.45" exhaust pipe with 4 mufflers.
48mm ITB made by Jenvey
Eales steel flywheel weight approx 7Kg
Forged pistons + manley H-beam rods.
Megasquirt 3X with semisequential fuel + 8x ignition coils.
Camshaft RS M238 (next winter i fit M256 camshaft)
Harland sharp roller rockers (next winter i fit chevy rockers slightly agressive ratio)
STD RRC/SD1 timing cover (next winter i fit serpentine front cover)

Dynoded flywheel 394hp/553Nm (wheels 350hp)

[Transmitter Man]

Deep pockets.

Second item down from this Aussy outfit: http://www.triumphroverspares.com.au/page.asp?pare...

+ http://www.triumphroverspares.com.au/page.asp?pare...

+ http://www.triumphroverspares.com.au/page.asp?pare...

They seem to offer a mix of their own cylinder heads and Wildcats on their RV8's but would be interesting to see some dyno figures of their own heads on a naturally aspiratated 5+ litre powerplant.

Phil
420 SEAC

[Podie]

Else on here got pretty close, but that may have been a 5.2 or 5.4


ETA - checked, it's a 5.2

[Kokkolanpoika]

Wild cat´s are not so impressive..

http://www.automotivecomp.com/v8engines.htm

It will run M248camshaft 10.8 CR, 47mm crossover inlet manifold etc.
5.0 WILD CAT ENGINE 398 BHP @ 5950 RPM, 340FTLB @ 5600 RPM

Eales measure his 5.2litre engine with those new TA-Performance heads approx 460hp, Same engine with same specs give 426hp his CNC heads..
I wont bother to spend approx 3000£ to get extra 30hp..

[V8 GRF]

Transmitter Man said:

Deep pockets.

Second item down from this Aussy outfit: http://www.triumphroverspares.com.au/page.asp?pare...

+ http://www.triumphroverspares.com.au/page.asp?pare...

+ http://www.triumphroverspares.com.au/page.asp?pare...

They seem to offer a mix of their own cylinder heads and Wildcats on their RV8's but would be interesting to see some dyno figures of their own heads on a naturally aspiratated 5+ litre powerplant.

Phil
420 SEAC

Those heads they're offering are actually the TA heads mentioned elsewhere. I know John Eales has done some work with those on a couple of engines.

[Transmitter Man]

Timo,

Did you ever look at reworking some Buick 300 ali heads?

Dan Jones in the US did some work on these as you can read here:

http://www.british-cars.org/mgb-gt-v8-technical-bb...

I'll mail him to see if there are any updates.

He had my CHI Ford heads ported for me.

Phil

[Chilliman]

Kokkolanpoika said:

I have..

But it is emission legal 5.2litre street engine..



Uploaded with ImageShack.us

5.2litre
Compression ratio 11.8
Home modded Rover heads with stage 4 valves (flows 172cfm @0.45-0.5")
home made 4-1 exhaust manifold with 41.5mm primary pipe
home made 2x2.45" exhaust pipe with 4 mufflers.
48mm ITB made by Jenvey
Eales steel flywheel weight approx 7Kg
Forged pistons + manley H-beam rods.
Megasquirt 3X with semisequential fuel + 8x ignition coils.
Camshaft RS M238 (next winter i fit M256 camshaft)
Harland sharp roller rockers (next winter i fit chevy rockers slightly agressive ratio)
STD RRC/SD1 timing cover (next winter i fit serpentine front cover)

Dynoded flywheel 394hp/553Nm (wheels 350hp)

Hi Timo, you have 33 bhp more than I, not taking into account the vagaries of RR's The major differences I see between your engine and mine are that you have another 200cc, ITB's and different cam..... (and exhaust but I don't think mine is really imposing any big restrictions on power). I'd be very interested to know at what rpm's you're getting peak power and torque??

Seems the bigger numbers are coming from the non rover heads???

Cheers, Chilli

[Chilliman]

Transmitter Man said:

I'll mail him to see if there are any updates.
Phil

Phil,

Be very interested to hear more

Cheers, Chilli

[GasMunkey]

Load of power to be had with a solid lifter cam Chili

[Kokkolanpoika]

Chilliman said:

Hi Timo, you have 33 bhp more than I, not taking into account the vagaries of RR's The major differences I see between your engine and mine are that you have another 200cc, ITB's and different cam..... (and exhaust but I don't think mine is really imposing any big restrictions on power). I'd be very interested to know at what rpm's you're getting peak power and torque??

Seems the bigger numbers are coming from the non rover heads???

Cheers, Chilli

Hi.

I think extra 200cc will mean more torque than bhp.. Long stroke etc.. What cam you are running? And what rpm?
My peak power is ~5560rpm and torque peak is ~3600rpm.
+ My roller rockers are from 1.55ratio.. I think 1.6-1.7 will give more boost..

This dynograph is from year 2011, it has got 381hp@5600rpm and 540Nm@3900rpm of torque. It will run MSD dizzy, haltech F10 (batch fire) and 10.8CR.
Megasquirt, + compression ratio make another +10hp more..


Uploaded with ImageShack.us

Over 500Nm hole rpm range +2000rpm up to +5000rpm.

[Chilliman]

[quote]I think extra 200cc will mean more torque than bhp.. Long stroke etc.. What cam you are running? And what rpm? My peak power is ~5560rpm and torque peak is ~3600rpm. + My roller rockers are from 1.55ratio.. I think 1.6-1.7 will give more boost..

This dynograph is from year 2011, it has got 381hp@5600rpm and 540Nm@3900rpm of torque. It will run MSD dizzy, haltech F10 (batch fire) and 10.8CR.
Megasquirt, + compression ratio make another +10hp more..
[/quote]

Cam is a bespoke jobbie, somewhere between a stealth and an H404, peak power is at 6025rpm and torque at 4664.... I can't upload piccies with the work server I'm using or I'd post the last dyno. That said, I posted it some time back I'll see if I can find the link...

Found it

http://www.pistonheads.com/gassing/topic.asp?h=0&a...

[Chilliman]

GasMunkey said:

Load of power to be had with a solid lifter cam Chili

Tell me more Alex

[carsy]

Chilli, you gone off the supercharger idea?

Think i will be heading down this route very shortly myself with sc powers new reduced prices.

[carsy]

Kokkolanpoika said:

5.2litre
Compression ratio 11.8
Home modded Rover heads with stage 4 valves (flows 172cfm @0.45-0.5")
home made 4-1 exhaust manifold with 41.5mm primary pipe
home made 2x2.45" exhaust pipe with 4 mufflers.
48mm ITB made by Jenvey
Eales steel flywheel weight approx 7Kg
Forged pistons + manley H-beam rods.
Megasquirt 3X with semisequential fuel + 8x ignition coils.
Camshaft RS M238 (next winter i fit M256 camshaft)
Harland sharp roller rockers (next winter i fit chevy rockers slightly agressive ratio)
STD RRC/SD1 timing cover (next winter i fit serpentine front cover)

Dynoded flywheel 394hp/553Nm (wheels 350hp)

Does this mean we can fit chevy rockers? Would be good seen as quality rockers are now a problem for the Rover.

[GasMunkey]

carsy said:

Does this mean we can fit chevy rockers? Would be good seen as quality rockers are now a problem for the Rover.

I got a chevy Ls rocker at 1.7 if you want to play with it?
It can't be hard to make fit if I'm honest

New set $200 plus bearing upgrade $120 good for 7500rpm they just don't break

[Graham]

Last time i spoke to john eales they had issues with the porting on the ta heads and the last engine wasnt making the expected power like the first engine they built. So theyvr gone back to the drawing board, but the target was well over 400 with a 5.2

Certainly possible to gey 400+ from a rover these days, but around 15k plug and play

[Chilliman]

carsy said:

Chilli, you gone off the supercharger idea?

Think i will be heading down this route very shortly myself with sc powers new reduced prices.

No mate, not gone off it, may well yet go the SC route. Just curious about breaking the 400 barrier N/A Got a body off coming this winter, chassis and suspension refurb, probably Nitrons, all that added to this years 16" fronts, big brake kit, Mk3 headlight conversion and front end respray. Unfortunately I've wasted the rest of my savings on beer and women