Toyota Lexus 1UZ Race Engines

[crafty]

nice looking setup...

http://www.race-cars.com/engsales/other/1200038700...


Toyota Lexus 1UZ Race Engines A viable and cost effective alternative to Cosworth and Judd engines in Euro-Boss, Oz-Boss and US-boss Series as well as sports cars and sports sedan. The current engine is in the early stages of development and already develops competitive BHP. The mechanical integrity has been outstanding with no failures being due to engine componentry It occupies the same width and height as the Cosworth/Judd V8 but is 100 mm longer due to the timing belt arrangement. Bellhousing/flywheel/clutch specifications to suit specific vehicles/gearbox are available. Currently fitted to Reynard 94D F3000. Specifications 534 BHP at 8400 rpm 520 BHP at 9000 rpm 338 lb/ft at 7800 rpm Minimum 300 lb/ft from 5900 rpm to 9000 rpm Rev limit 9200 rpm Weight -330lbs including flwheel, oil pump, alternator, exhaust headers Capacity – 3969 cc Bore – 87.5 mm Stroke – 82.5 mm Crank – Toyota 1UZ Rods – Saenz – increased length with ARP L19 bolts Pistons – Wiseco 12.5 – 1 compression, 3 ring slipper design Heads – Modified Toyota 1UZ 4 valve DOHC Valves – Inlet 36mm, exhaust 32mm, with Titanium retainers and competition springs Camshafts – Billet 330 deg duration, lightweight shim under buckets Induction – Individual 50 mm slide plate throttle with bell mouths, Siemens piezo crystal injectors Lubrication – 5 stage Dailey Engineering dry sump pump with centrifugal oil/air seperator, negative crankcase pressure Sump – 4 compartment with crank scraper designed to minimize oil held in sump while running, incorporating lower engine mount key to Cosworth design. Front timing cover designed with oil pump and alternator mounts, crank trigger for ECU, oil supply to main gallery and timing belt tensioner. The engines are available in various cost and performance stages

Engine

* Engine Builder: Richardson Motorsport
* Manufacturer: Toyota
* Type: V/8
* Displacement: 3969cc
* Horsepower: 534
* Torque: 338lbs/ft
* Induction: FI

[ezakimak]

http://www.v-eight.com/tech_forum/viewtopic.php?f=...

[Slow M]

ezakimak said:

http://www.v-eight.com/tech_forum/viewtopic.php?f=...

Rubber biscuits, rubber bullets, and rubber bolts. Did the valves go bouncy bouncy?

[JoulesCanAm]

Okay, I'll play devil's advocate.... Why for 534 BHP that can be had all day long from an SBC or LS engine and at well under half the cost?

Julian

[ezakimak]

There is another galery in the next post down.
http://www.v-eight.com/tech_forum/viewtopic.php?f=...

the valve drive by ruber belts is standard toyota for the time. its also common on race tuned LS and SBC engines as its lighter than a timing chain. you just have to maintain it more.

as to why they fitted this particular engine, i dont know. might be something to do with the actual size as i think its slightly shorter than a SBC or LS. packaging is everything in an open wheeler.

[V8Dom]

JoulesCanAm said:

Okay, I'll play devil's advocate.... Why for 534 BHP that can be had all day long from an SBC or LS engine and at well under half the cost?

Julian

Maybe weight?

dom

[Slow M]

V8Dom said:

JoulesCanAm said:

Okay, I'll play devil's advocate.... Why for 534 BHP that can be had all day long from an SBC or LS engine and at well under half the cost?

Julian

Maybe weight?

dom

Possibilities:
engine deal,
sponsorship,
displacement,
may have to be production based?,
cost (AT THAT DISPLACEMENT)
power/weight...

[chuntington101]

Slow M said:

V8Dom said:

JoulesCanAm said:

Okay, I'll play devil's advocate.... Why for 534 BHP that can be had all day long from an SBC or LS engine and at well under half the cost?

Julian

Maybe weight?

dom

Possibilities:
engine deal,
sponsorship,
displacement,
may have to be production based?,
cost (AT THAT DISPLACEMENT)
power/weight...

What about power delivery?... how would a super light single seater chassis cope with 500lbsft of torque ripping through it?.....

Chris.

[ezakimak]

chuntington101 said:

Slow M said:

V8Dom said:

JoulesCanAm said:

Okay, I'll play devil's advocate.... Why for 534 BHP that can be had all day long from an SBC or LS engine and at well under half the cost?

Julian

Maybe weight?

dom

Possibilities:
engine deal,
sponsorship,
displacement,
may have to be production based?,
cost (AT THAT DISPLACEMENT)
power/weight...

What about power delivery?... how would a super light single seater chassis cope with 500lbsft of torque ripping through it?.....

Chris.

Chris, You did see the size of the rear tyres on that Reynard didn't you all the suspension if bolted to the transaxle car which is bolted directly to the engine. roll stifness is governed by the ARBs and the two springs connected directly to each push rod coming from the wheel. a lot of the open wheelers also run a third spring both front and rear to de-couple the aero load and the acceleration/braking forces from the roll stifness of the car.


traction at low speed will be limited to the mechanical grip of the tyres relative to the force required to move the car/weight which will be lower for a lighter car. at higher speed its all about wings and diffusers.

[chuntington101]

ezakimak said:

chuntington101 said:

Slow M said:

V8Dom said:

JoulesCanAm said:

Okay, I'll play devil's advocate.... Why for 534 BHP that can be had all day long from an SBC or LS engine and at well under half the cost?

Julian

Maybe weight?

dom

Possibilities:
engine deal,
sponsorship,
displacement,
may have to be production based?,
cost (AT THAT DISPLACEMENT)
power/weight...

What about power delivery?... how would a super light single seater chassis cope with 500lbsft of torque ripping through it?.....

Chris.

Chris, You did see the size of the rear tyres on that Reynard didn't you all the suspension if bolted to the transaxle car which is bolted directly to the engine. roll stifness is governed by the ARBs and the two springs connected directly to each push rod coming from the wheel. a lot of the open wheelers also run a third spring both front and rear to de-couple the aero load and the acceleration/braking forces from the roll stifness of the car.


traction at low speed will be limited to the mechanical grip of the tyres relative to the force required to move the car/weight which will be lower for a lighter car. at higher speed its all about wings and diffusers.

My point was more how the chassis, ie grip and actually chassis strength, would cope. that much torque is simply not needed in a supper lightweight car. It would be like drivng an ultima with 1500lbsft of troque just past tickover, i.e. totaly undrivable! lol aslo the chassis aren;t that strong!strength adds weight and that is a sin in single seater cars. So you build everything to take the max likely forces. sticking a great whacking torque monster of a LS engine in there would probably twist the chassis, snap the driveshafts and the first time accelerating hard out of a corner, kill the driver.

[738 driver]

^ x2 ......Look how the F1 motors operate, no stroke, no torque just big rpm and HP,
similar to bike motors really!

[ezakimak]

chuntington101 said:

Sticking a great whacking torque monster of a LS engine in there would probably twist the chassis, snap the driveshafts and the first time accelerating hard out of a corner, kill the driver.

Sounds like an old F5000 car. They had them as a historic demonstration class at the Melbourne F1 GP the other year. They look like nothing more than a folded piece of aluminium with a SBC bolted to the back and a hewland bolted to the back of that.

like these
http://www.flickr.com/photos/jase010/4471315192/in...

http://www.flickr.com/photos/jase010/4471315504/in...

http://www.flickr.com/photos/jase010/4475372887/in...



If i didnt lose my nuts driveing one of thoes, i think the other half would probably chop them of her self. I cant believe guys used to race thoes. there is just nothing to them.

Edited by ezakimak on Friday 1st October 02:26

Edited by ezakimak on Friday 1st October 02:28

[chuntington101]

ezakimak said:

chuntington101 said:

Sticking a great whacking torque monster of a LS engine in there would probably twist the chassis, snap the driveshafts and the first time accelerating hard out of a corner, kill the driver.

Sounds like an old F5000 car. They had them as a historic demonstration class at the Melbourne F1 GP the other year. They look like nothing more than a folded piece of aluminium with a SBC bolted to the back and a hewland bolted to the back of that.

like these
http://www.flickr.com/photos/jase010/4471315192/in...

http://www.flickr.com/photos/jase010/4471315504/in...

http://www.flickr.com/photos/jase010/4475372887/in...



If i didnt lose my nuts driveing one of thoes, i think the other half would probably chop them of her self. I cant believe guys used to race thoes. there is just nothing to them.

Edited by ezakimak on Friday 1st October 02:26

Edited by ezakimak on Friday 1st October 02:28

YEah i remember seeing some footage of them race. they look and sound great! maybe there could be a one make race series using a ls engine in a single seater? def be intresting to watch.

Chris.

[ezakimak]

they had a big crash in melbourne on 2009 as part of the deomstration / support event for the f1, but cant seem to find anything on it.

did find this though
http://www.youtube.com/watch?v=GopK6W0WybQ

love that sound.

[UltimaCH]

I remember in the early 70's the F5000 race cars. I worked for Ted Pilette's father in Belgium who had a racing drivers school at the Zolder track. Followed some of Ted's races in the UK and I believe he did become European champion in 1973. Nice cars with a Chevy small block if I remember. They mixed some race(s) with F1 cars due to lack of participants in F1 if I recall. Memories, memories...

Found this story of the Pilette family: http://forix.autosport.com/8w/pilette.html

Edited to add link

Edited by UltimaCH on Friday 1st October 11:50