Could someone list the cheapest way to get reliable 450bhp at the fly with breakdown of costs and parts please?:duffer:

Rough costs, and all IMO....

 

Starting with a completely stock car

 

400hp Fly is about the max possible with Stock Turbos, Injectors and Intercoolers, so your going to have to invest in aftmarket.

 

forging the engine for reliablity -

 

555 Injectors - £500

Z1 GT525 Turbos or JWT Sport500 - £1200

Aftermarket FMIC or SMIC - £300-£600

Boost controller - £150

Wiesco Forged pistons - £400

Cometic Head gasket - £100

Engien gasket set - £150

Rechipped ECU - £100

Induction kit - £80

Decat & Downpipes - £150

Catback exhaust - £400

RPS Max clutch - £400

Labour for engine removal, rebuild and fitting of parts : £1500 - £2000

or if you kept standard internals -

 

555 Injectors - £500

Z1 GT525 Turbos or JWT Sport500 - £1200

Aftermarket FMIC or SMIC - £300-£600

Boost controller - £150

Rechipped ECU - £100

Induction kit - £80

Decat & Downpipes - £150

Catback exhaust - £400

RPS Max clutch - £400

Labour for engine removal and fitting of parts - £1000

 

Personally a stock engine in good condition would run 450hp reliably providing the car has good mapping, but a fresh rebuild with forged pistons is always going to be a benefit in reliability.

Edited August 1, 200817 yr by Yowser

Thanks fella.

 

Any other opinions??

you would probably want to add rods to the rebuild imho

Thanks fella.

 

Any other opinions??

Legrath is pretty much bang on with that mate, it's certainly a good bench mark and of course it depends are prices for parts and who's doing the labour, but his listing is good :cool:

We already have forged rods in our blocks and deffo not a weak point and for a measley 450 at the fly, not worth the expense of parts or labour.

All i would add is new bearings if doing the rebuild, cost around 100 quid but well worth doing.

smithy

Wicked thanks for that Smithy and Stevie.

 

Am toying with the idea of building a diablo using the VG30DETT lump with 4 - 5k to spend on getting it reasonable power and a rebuild.

Could someone list the cheapest way to get reliable 450bhp at the fly with breakdown of costs and parts please?:duffer:

 

I was able to get 360 at the wheel with only a stage 3+ upgrade. If you figure that is 85% of the fly, then I am making 425bhp.

 

This is with stock internals, injectors and intercoolers. I did the basic intake, full exhaust (downpipes, test pipe and catback), ash chipped ecu, and boost controller. I had to replace the clutch almost immediately, but the rest is holding great.

 

The most important thing is proper tuning. You will need either a wide band O2 monitor so you can do it your self or find a good tuner. The chip I got from Ash Spec in Florida was good up to 12.5 psi running the USA 93 octane without detonation. I know if I used race gas and a higher boost I could have gotten the max stock injectors are suppose to get .... 370 rwhp without detonation.

The U.S Dyno figure results are never comparable to the U.K dyno figures. Yours mods with 12.5psi would barely see 350hp at the flywheel here.

The U.S Dyno figure results are never comparable to the U.K dyno figures. Yours mods with 12.5psi would barely see 350hp at the flywheel here.

 

you could be right .... all I know is that I am beating Corvettes and Cobras with manufactured claims of over 450bhp. I know I raced a couple of Jags with claims of over 400 and they were not even close.

 

The supercharged Jaguar XF . At its heart is a 4.2 liter, 32-valve, all-aluminum V8 with four overhead cams and variable camshaft phasing to boost response. Add a crankshaft-driven blower and you have 420 hp and up to 408 lb-ft of torque

In the XKR, an Eaton supercharger is added, ramping horsepower to 420

555 Injectors - £500

Z1 GT525 Turbos or JWT Sport500 - £1200

Aftermarket FMIC or SMIC - £300-£600

Boost controller - £150

Wiesco Forged pistons - £400

Cometic Head gasket - £100

Engien gasket set - £150

Rechipped ECU - £100

Induction kit - £80

Decat & Downpipes - £150

Catback exhaust - £400

RPS Max clutch - £400

Labour for engine removal, rebuild and fitting of parts : £1500 - £2000

 

what boost would those turbos need to be running to reach 450bhp? i have the same spec as above, if not slightly more (SAFC-2, twin intake), but with rebuilt stock 360 degree ballbearing turbos instead of aftermarket ones. would tweaking the boost to 17psi or so result in roughly the same bhp?

what boost would those turbos need to be running to reach 450bhp? i have the same spec as above, if not slightly more (SAFC-2, twin intake), but with rebuilt stock 360 degree ballbearing turbos instead of aftermarket ones. would tweaking the boost to 17psi or so result in roughly the same bhp?

 

I believe Jimmer is running the GT525's on 19psi and recorded a flywheel figure of 376 at the wheels, which is around 450 at the fly.

Edited August 1, 200817 yr by Yowser

what boost would those turbos need to be running to reach 450bhp? i have the same spec as above, if not slightly more (SAFC-2, twin intake), but with rebuilt stock 360 degree ballbearing turbos instead of aftermarket ones. would tweaking the boost to 17psi or so result in roughly the same bhp?

 

Hi,

 

I've just got mine back from the dyno (today) - more on that to follow, but I am also running stock housing 360 degree hybrid turbos and she made 457 at the fly, that was at 1.2 bar (17.5psi), albeit that normally I run at 1.4 bar quite happily - for some reason it wouldn't make 1.4 bar on the dyno.

 

I've got all the forged internals etc, standard cams, but some extensive head work and lightening and balancing.

 

CheerZ,

JB.

im thinking of having an engine refresh next year, pistons and tubs, not lookin for huge power, just drivable relability

 

what price am i lookin at????