Hero Status (Turbo'd Busa'd Lotus 7 Rep Project)

[Gaz.]

Shamelessly stolen from SXOC...

Here's my project: I'm swapping the fireblade engine out of my kit car (it weighs 467kg). Replacing it with a Hayabusa and a GT3076 . It should make just over 500hp at 2 bar.

I'm hoping to keep the weight of the car under 500kg. It shoud be pretty close to that by the time I've added the IC, turbo, pipework, dry sump, etc.

Here's the victim:

It's an Lotus Seven Replica. Currently fitted with a 126bhp Fireblade engine.

The replacement hayabusa engine with the GT3076. I'm going to have to fabricate the turbo kit as I want it to fit under the bonnet and use a single throttle body.

Crank and gearbox. The engine only had 1700 miles on it, so everything was nice and fresh.

Cylinder barrel cleaned up

Crank case cleaned up

New oil pickup wired in.

Dry Sump installed.

Wossner rods.

Uprated oil gear to give the oil pressure a boost.

Wossner pistons and ARP studs.

Head back on with a 0.080 spacer plate to help lower the compression.

Adjustable cam sprockets pressed onto the cam shafts and tack welded.

Engine Built.

Next job..

Fab the manifold. :smash:

That's going to be insane.

 

[Tunst]

Mad fucker! That will shift.

 

[Justin]

Ace!

 

[Christopher]

Unreal.

 

[fUbAr]

Awesome project!

 

[Silent_Scone]

That's 1087hp per ton. ouch

 

[Gally]

Isn't that, forgive me for saying, too quick?

 

[BIFCAIDS]

sideways everywhere

 

[Gaz.]

That's 1087hp per ton. ouch

Yup, the actual project thread over on SXOC is called "1000bhp per ton".

Clinically insane, but respectable at the same time.

 

[Goodj]

sideways everywhere

0-60 timings will be conducted with armfulls of lock.

I know I'd like one of these to play with though.

 

[Ali]

that'll go bang in about 7 seconds.

 

[couzens]

ahh ali you just disaprove with anything <3

 

[Ali]

I don't disapprove at all, infact i think it's amazing...And will be amazing for 7 seconds!

The R400, or Superlight R with 200bhp is a handful and that's 0-60 is under 4sec. I cannot image how undriveable this will be with a honking greater blower!!!

 

[LIL B]

That engine will not go bang, ali.

But useable, no. Will need some very trick electrics to "use" it.

 

[Gaz.]

Plenty of knowledge in the drag scene with turboing 'busa lumps. I doubt it'll pop after 7 seconds, it'll last a bit longer.

 

[Goodj]

would the turebo help bulk out the low-mid range torque? Oh iwould it be coming in at the top-end only?

If the former, I'd have thought it would help the driveability if anything?

 

[LIL B]

would the turebo help bulk out the low-mid range torque? Oh iwould it be coming in at the top-end only?

If the former, I'd have thought it would help the driveability if anything?

A Hayabusa engine lacks nothing. So will improve everything.

 

[Ali]

That engine will not go bang, ali.

But useable, no. Will need some very trick electrics to "use" it.

500bhp, custom built turbo etc, home build!

Folk on here can't even get TB's and Superchargers working!!! It will go bang! I'll bet my jewish konk on it!

 

[Gaz.]

There's not going to be masses of torque, torque using a bigger GT35 on the same engine peaks at 280ish lbft @ 9800rpm, power peaks at 552bhp @ 10,500rpm. He's using a smaller turbo, and there's not masses of grunt low down.

That image shows a GT35 (blue) vs a GT40 (red/brown).

 

[Silent_Scone]

Impressive. Wonder how much you'd have to spend to get an F4R to rev past 10,000rpm?




SXOC always has wacky project threads

 

[Fred@BTM]

bit too much power, as ali said even a standard R300/R400/R500 is silly

 

[Gaz.]

Somebody has calculated this...

500 kg car.

Let's assume 40:60 F:R weight split (under acceleration), giving about 3000 N on the rear axle.

Let's assume some pretty sticky tyres giving 1.4 mu - that gives you a max tractive effort of 4200 N.

500 bhp is about 375 kW. 375000 ÷ 4200 = 89 m/s - the maximum speed at which that power will give you that tractive effort.

Translated, that means that this car (at max power rpm) will spin its wheels in the dry at any speed up to 200 mph, pretty much on the nose.

Slightly excessive if that's the case.

 

[Silent_Scone]

That's a lovely equation... but there are these things called pedals which have variations of throttle and stuff

In all seriousness he's right it's a bit much lol

 

[Gally]

Isn't that, forgive me for saying, too quick?

that'll go bang in about 7 seconds.

I don't disapprove at all, infact i think it's amazing...And will be amazing for 7 seconds!

The R400, or Superlight R with 200bhp is a handful and that's 0-60 is under 4sec. I cannot image how undriveable this will be with a honking greater blower!!!

bit too much power, as ali said even a standard R300/R400/R500 is silly

As I said.

If anything he's making it worse. That power won't be usuable and neither will the car imo.

 

[Ali]

You're not forgiven tho.

 

[JD]

Build up, build up, build up BOOST sideways/crash.

 

[Gally]

You're not forgiven tho.

For what?

 

[Ali]

Build up, build up, build up BOOST sideways/crash.

Within 7 seconds.

 

[recaro182]

There aren't too many cars that would genuinly scare me to drive, this is one of them though! For that reason I love it

 

[Silent_Scone]

Within 7 seconds.

lol

 

[SamP]

When you've got 12,000 RPM who cares about turbo lag?

 

[jack_kemp]

Absolutely ridiculous idea. But I want one.

 

[mestew87]

The engine will last longer than 7 seconds, they have been F/I hyabusa engines for a long time. As long as mapping is done well there is no reason for it to destroy itself

 

[Kneel]

The engine will last for as long as he keeps oil in it and it all pointed the right way. Saying this 1000hp+ per ton in a car like that, without traction control and with turbo lag takes some serious balls, If he can get it to drive without killing himself it will be fcuking awesome!

 

[theduck]

Ultimate drivers challenge?

f**king crazy and I love it for it. Reminds me how much I want a 7, even one with a measly 100bhp would do!

 

[Daz.]

Wow, woudn't mind a go mind!

 

[MarcoB]

Mental, but I love it. I hope hes got a variable pitch rack on that car because hes going to be locking to locking it at what ever speed he does.

 

[Silent_Scone]

The engine will last longer than 7 seconds, they have been F/I hyabusa engines for a long time. As long as mapping is done well there is no reason for it to destroy itself

our kawasaki engine in the spire lasted many a track day and it was red lined constantly. Unbelievable amount of abuse, so I can believe it

 

[Mark One]

Somebody has calculated this...

500 kg car.

Let's assume 40:60 F:R weight split (under acceleration), giving about 3000 N on the rear axle.

Let's assume some pretty sticky tyres giving 1.4 mu - that gives you a max tractive effort of 4200 N.

500 bhp is about 375 kW. 375000 ÷ 4200 = 89 m/s - the maximum speed at which that power will give you that tractive effort.

Translated, that means that this car (at max power rpm) will spin its wheels in the dry at any speed up to 200 mph, pretty much on the nose.

Slightly excessive if that's the case.

No. Just No. He is so confused. If you take watts and divide by Newtons, you sure as hell don't get speed. You get Watts Per Newton, or Joules Per Newton Second.
It's a mental car. But that guy is more mental

 

[Paddy_g46]

Somebody has calculated this...




Slightly excessive if that's the case.

Translated, Hero car! It does not matter that it will spin up at max power rpm at 150mph. What matters is that it is possible.