Lightweight motor and transaxle

I

Ivann

Hi good people. This is my first posting on gt40 although I have been visiting for at least 18 months trying to convince myself that the SL-C is not the most spectacular road legal...... anything.....that I have ever drooled over. I am now getting to grips with the reality that it will be part of my future:chug:
I am planing to build the fastest thing on 4 wheels that ever was (reach for the stars first and then refuse to compromise) I therefore need to plan for a track spec car that is coincidentally road legal to:laugh:
This would necessitate a lift kit in order to allow for that fantastic inverted wing front splitter but to get to my question: I believe that light and nimble is better than and faster than brute force so what do you think of a small lightweight v8 like the Hayabusa v8 perhaps with a turbo like the one sold by Holeshot racing in the UK? This taking into account that budget is not the biggest issue.
 
J

John Ross

Fastest thing on four wheels?

If you mean highest top speed, you are going to need more power than a dual Hayabusa motor can make.

If you mean fastest around a typical road course (one that doesn't have a straight section long enough to get the car up to 180+), I would think you'd want a car that is even lighter than the weight of an SLC with the lightest possible drivetrain. 500HP Nemesis, perhaps?

Correct me if I'm wrong here, folks.

JR
 
I

Ivann

John there is something special about the c monsters and the SL-C is a modern interpretation that I can motivate to my wife (at least I have a chance) and so practical that I can go and buy the milk in it. I like the fact that it has a roof and windscreen and a passenger seat and then it is so beautiful that it is art. Holeshot sells a 3.2 twin turbo with a 1000bhp that weighs in at 88 kg or 194 lb!!!. I think that with max downforce, light weight and the chassis and tyre capacities that I can get with an SL-C the summit is perhaps not that high irrespective of whether we talk straight line, track handling or road speed. What do you think?
 
B

Ben Whittle

Even if cost wasn't an issue I believe that engine's life span is measured in hours so you may want to check in with them... Radical also have a bike engine based V8 but I'm not sure they sell them outside of Radical.
 
I

Ivann

Thanks for the welcome Jack. I will check the lifespan Benji and then take their estimate and half it :thumbsup:. Good point but Suzuki builds pretty durable stuff. The Radical megablock produces less than 500bhp.
 
I

Ivann

Jack it would have the sound of a host of angry angels but then would I still be able to go and buy milk without being arrested?
 
R

Dave

molleur said:
I'll go out on a limb and conclude the dual turbo 20B could get you there.
Click to expand...
You could even go with aluminum side housings and save another 50 pounds. Single turbo is the way to go. No room for two and besides, two turbos weigh more than one :drunk:
 
T

TSR

If I may add my two cents, A unreconised power plant that would be worthy for a SLC and has sound second to none would be Lexas LFA 1LR-GUE 4.8 liter V-10 power out put is in the 550BHP range with peak power at 8,700 RPM with a redline at 9,000RPM. This power plant would be perfect with the Graziano gearbox that Fran is now offering. I just hope someone from Toyota is reading this thread and make this engine available as a crate engine in the near future.:thumbsup:
 
G

James

Trippingale said:
If I may add my two cents, A unreconised power plant that would be worthy for a SLC and has sound second to none would be Lexas LFA 1LR-GUE 4.8 liter V-10 power out put is in the 550BHP range with peak power at 8,700 RPM with a redline at 9,000RPM. This power plant would be perfect with the Graziano gearbox that Fran is now offering. I just hope someone from Toyota is reading this thread and make this engine available as a crate engine in the near future.:thumbsup:
Click to expand...


Going with such an expensive engine, I have heard estimates that it would be over $30,000 for the engine and even some say more, for a little over 500hp? Granted, it's light and sounds great, but I don't think it's that much lighter than an LS3, maybe 50lbs?

The Graziano tranmission is actually quite heavy,, IIRC it's a bit over 200lbs, like around 220-240 or so. Which would completely counter the attempt of the lightweight drivetrain.

If the engine was say around $10k-$12k I would say it would be a good option, but I just don't see it being that "cheap"
 
I

Ivann

:cry::cry:I enquired with Holeshot about the H1v8 twin turbo 1000bhp service intervals. Basic rebuild every 30 hours for racing and every 60 hours for street. Also a 200lb v8 that red lines at 10400 rpm(!!)comes at a price....$ 37 000 and that is silly money. Even if money is no object it is difficult to motivate. I have seen Judd engines for less.
 
roger reid

Roger Reid

Supporter
guitaraholic said:
?..The Graziano tranmission is actually quite heavy,, IIRC it's a bit over 200lbs, like around 220-240 or so. Which would completely counter the attempt of the lightweight drivetrain...
Click to expand...

I just checked the weight specs of the G50-52 at 156 lbs. This is a strong box for being prox 64 lbs lighter.
 
G

Robert May Eng.

Ivann Kirsten said:
Hi good people. This is my first posting on gt40 although I have been visiting for at least 18 months trying to convince myself that the SL-C is not the most spectacular road legal...... anything.....that I have ever drooled over. I am now getting to grips with the reality that it will be part of my future:chug:
I am planing to build the fastest thing on 4 wheels that ever was (reach for the stars first and then refuse to compromise) I therefore need to plan for a track spec car that is coincidentally road legal to:laugh:
This would necessitate a lift kit in order to allow for that fantastic inverted wing front splitter but to get to my question: I believe that light and nimble is better than and faster than brute force so what do you think of a small lightweight v8 like the Hayabusa v8 perhaps with a turbo like the one sold by Holeshot racing in the UK? This taking into account that budget is not the biggest issue.
Click to expand...

Light and nimble wont need a huge v8. TVR made a v8 that really is the biz, it weighs less than zetec four pot ford and comes complete with individual throttle bodies and a host of nice internals like flat plane crank. Also very small ,600mm long.I was going to shove one in my car but its just not right. Also complete engines from damaged cars go for as little as £2,500. This would be my engine of choice for any project needing a v8.

Bob

http://www.pistonheads.com/tvr/default.asp?storyId=19361

http://raceproved.com/news/ajp-v8-powered-f3000-5


Melling V8 - Wikipedia, the free encyclopedia
 
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G

James

gtbob said:
Light and nimble wont need a huge v8. TVR made a v8 that really is the biz, it weighs less than zetec four pot ford and comes complete with individual throttle bodies and a host of nice internals like flat plane crank. Also very small ,600mm long.I was going to shove one in my car but its just not right. Also complete engines from damaged cars go for as little as £2,500. This would be my engine of choice for any project needing a v8.

Bob

AJP8 Relaunched

AJP V8 Powered F3000


Melling V8 - Wikipedia, the free encyclopedia
Click to expand...


I've thought about using the Melling V8 as well. It weighs only 300lbs or so dressed, that is EXTREMELY light. I've actually wondered how they made the engine that light!! It makes around 450hp (IIRC), and finally, it also sounds AWESOME!!!.. Just wonder how expensive it would be to maintain.
 
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C

colin artus

I worked with a race team running a Tuscan in the one make series for those cars. They were pretty reliable in race trim , especially after the factory backed the ignition timing off over the course of a couple of seasons. The race engines were all sealed factory units and were designed to make a seasons racing before being returned. The power fell from 450 bhp to about 415, but the incidence of engine failure dropped to negligible. They probably had 40 to 50 hrs on them before going back to the factory. The versions in the road cars were the same apart from the intake system and sump arrangement. Although we weren't allowed to change anything there were some gains to be had in careful reassembly of the intake system to align the ports more closely.
 
G

Robert May Eng.

guitaraholic said:
it also sounds AWESOME!!!.. Just wonder how expensive it would be to maintain.
Click to expand...

I asked Dave Batty a TVR specialist this very question and he reckons there to be no issues with a properly maintained and serviced unit. He also seems to think that rebuilds are not expensive because bearings etc are common to other engines. I think although the engine itself is unique ie block,crank and heads the rest is perhaps built up out of the parts bins of other engine manufacturers. Nonetheless its one heck of an engine and can make over 600hp if tuned so its a worthy contender , if you want a v8 mid engined car without the pendulum effect its got to tick some boxes.

Bob
 
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