Chevy SBC Physical Dimension Vs. 1UZ

[Lextreme II]

Anyone have Chevy SBC physical measurements? I wonder if these engines would fit into a Lexus.

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[Pro]

definitely has a wider block but is a little shorter in height.

i'd say it looks as wide - if not wider - than a 1UZ.

remember the LS7 is no treefiddychebby - a stock 350 chev is much smaller in all dimensions than a 1UZ except that the exhaust port width where it is almost the same.

 

[Bulldogg]

Hardcore 454

Mate you want to check out the limited edition Hardcore 454 small block from World. bout 650hp stock with a single carb. bout 11k US though.

 

[jibbby]

I measured and the width would be possibly the biggest hang up...Some very flat headers would need to be created in opinion for this swap to work... The steering rod may also be a hinderance...Would love to see this engine in an SC or LS....

Weight is close to identical with the 1uz's because of the LSx alluminum blocks... I truely believe this swap is doable...Mating the engine up with the Lex tranny and ECU is probably that hardest part...Instrumentation integration...Tranny codes, etc... I would say if you were thinking of the LSx swap you probably should go ahead and do the Chevy/GM tranny swap too...

A complete Chevy engine and compatible tranny swap should be considered in combination with a compatible chevy stock ECU or a stand alone ECU. You still would have to integrate the Lexus instrumentation....One wire at a time....

 

[JBrady]

I am not sure what you guys are talking about. An OHC engine having the cam and drive on top of the heads adds significant width to an engine. I haven't measured myself but the following picture of a small block chevy 327 (all are nearly identical external dimensions from the 265cid to 400cid factory sizes and stroker 400+cid sizes)

It sure LOOKS to me that the 1UZFE is MUCH MUCH wider than a SBC.

BTW the small block Fords (260, 289, 302s) are smaller than the Chevy's.

 

[WDoherty]

yeah its wierd, i have a 400 cubic inch (6.6L in the nouveau riche) sbc and it is small externally to my 242 cubic inch 1uz, its a strange feeling looking at both and wishing lexus could have at least upped it a liter and a half or so thinking about mouse torque monster and my huge torqueless.

 

[jibbby]

I measured the 572 Chevy crate engine....It came up a little wider then the 1uz-fe with the headers and all considered...The oil pan measured an inch or two lower from top to bottom also...

I used a tape measure and measured by hand...

 

[WDoherty]

dang, so a a big block is just a little bigger than a 1uz, that's nuts.

 

[JBrady]

Actually, the 572 is a tall deck block making it wider than a traditional 454. Also, measuring the header with is hard to consider without seeing the headers.

 

[WDoherty]

there you go jibby, i think we found your engine, a crate 572. I know how you love torque. Too bad that thing would twist apart anything that spins in your drivetrain and you'd launch with your right (or is it left) wheel in the air. Just playin, but seriously a lexus with chassis flex from torque would be a site to see.

 

[jibbby]

JB - I came so close to buying this discarded 572 crate motor....I just didn't see it fitting into my lexus....Just a little too much motor to squeeze into an SC......Super flat headers would have had to be created and a modified oil pan of some sort....It would have been a very tight fit.....Had to pass....

WD - The Th400 tranny would have been swapped in with that motor....New custom built drive shaft and my Supra LSD should have handled the power just fine.....That would have been sweet??? Yes torque city off that motor....

So the 572 is a larger block which I had guessed in comparison to the LSx motors.... If that is the case why hasn't anyone on this forum tried swapping in the LS1 or something?....At around 400whp N/A, and with smaller dimensions and probably lighter in overall weight in comparison to the Xuz.. motors it seems like a no brainer to me if your planning for an engine swap.....WD as you know the LSx motors are beasts and can easily be motified to make more HP's with cams, intake etc........

I think I will be swapping in an LS1 into something before I get too old for this crap....It seems like the most logical and cost effective choice for swaps too me...

Also, I have always been a big fan of N/A power....N/A power limits the headaches and trouble such as cooling problems, boost timing and tuning problems, etc...Big N/A power is the best....

 

[JBrady]

Here are some dimensions. On the LSx shown it is a truck engine which has a taller intake manifold than the car engines. Notice also that they measure valve cover width on the old small block and big block but they include the sparkplug and wire on the width of the LSx.

Another thing is look at the exhaust outlet locations of the small block vs the LSx. The small block headers would be more protruding based on the angle and location. Overall the LSx looks at least as small as the "small block".

http://paceperformance.com/index.asp?PageAction=Custom&ID=586


Standard Small Block Chevy 305/350

LS1/ LS6 & LS1 Based Truck Engines

Vortec 8100 (Gen VII Big Block)

 

[Toy Snake]

A 60 deg. V8 pushrod motor will offer much better width clearance for displacement growth as compared to a 90 deg. DOHC. Apples and oranges as far as comparisons goes IMO.

Al K.
SoCal USA
'80 Celica 32v Cobra Transplant Project
http://mysite.verizon.net/respa4eb/1980celicacobraproject

 

[JBrady]

A 60 deg. V8 pushrod motor will offer much better width clearance for displacement growth as compared to a 90 deg. DOHC. Apples and oranges as far as comparisons goes IMO.

Al K.
SoCal USA
'80 Celica 32v Cobra Transplant Project
http://mysite.verizon.net/respa4eb/1980celicacobraproject

Where would you get a 60 degree V8 pushrod engine? Almost all V8s are 90 degree. The only production 60 degree that comes to mind is the Ford SHO Taurus engine by Yamaha and that is not an engine with any aftermarket support plus it is only something like 3.4 liters.

 

[Toy Snake]

Good catch JBrady. I got so caught up with push rod motors being externally balanced V8's that I forgot they were not 90 deg. and did not check. I'll back pedal and say large head DOHC engines with wide valve angles create a problem as compared to push rod V8's. With FE being narrower than RG.
Regards,
Al K.

 

[WDoherty]

Where would you get a 60 degree V8 pushrod engine? Almost all V8s are 90 degree. The only production 60 degree that comes to mind is the Ford SHO Taurus engine by Yamaha and that is not an engine with any aftermarket support plus it is only something like 3.4 liters.

my friend had one of those sho's and it was nice. I'd say performance was similiar to the sc400, although i know the sho motor had problems.

 

[rarson]

From what I understand, the only real problem they had with those engines were the cam gears. They had a tendency to rotate freely with respect to the cams themselves. Not too difficult a fix...

Also, they do have SOME aftermarket support... not much. Probably not as much as the 1UZ, and as stated, they ARE only 3.4L...

 

[WDoherty]

yeah those cars didn't get much aftermarket b/c of the same problems we have, too little displacement, auto tranny only, and too much vehicle weight. But yes they have fixes for the cams and are a fine motor if that problem is taken care of.

 

[jibbby]

The Ford Tauras is quite possibly the worst manufactured car known to man...The transmissions all fail before 100,000 miles...Front wheel drive crap...The Sho has a little power but is still crap...The Mercury Sable same problems...I came across a few of those cars in my dealership days, and was so happy when I unloaded them...Worst cars from my experiences-

Ford Taurus including the SHo
Ford Escort and Ford Escort GT
Chevy Cavalier
Mercury Sable
Jaguar (12 bangers)
Land Rover Discovery

I know I forgetting some others but these are the cars that come to mind with the most problems...

 

[Toy Snake]

The Taurus/Yamaha 60 deg. SHO V8 is an exception and not the point. My mistake created the subject change. Sorry to steer the subject off track of big displacement American V8's.

JBrady was pointing out the flaw in my statement about MOST V8's being 60 deg. No excuses acceptable for my error.

The Lexus 1UZFE is a great engne for its size and weight. It simply takes up more engine bay space as compared to a push rod American V8 of similar and larger HP and displacement. The Lexus quad cam engine platform with FE narrow valve angle is compact compared to say the Infinity or Ford. It would be easier for me to fit an old big block V8 than the 4.6L Ford Cobra. Not the direction I was going.........

I chose a "fatgirl" 4.6L DOHC Ford as far as quad cam engines go for licensing as a steet car in California because it is better suited in my opinion as a street legal stock swap drivetrain by Cali law with a factory manual tranny and factory ECU to Smog for the HP output. My choice would have been a !UZ Toyota with a manual tranny if it was smog legal.

Regards,

Al K.
SoCal USA
'80 Celica 32v Cobra Transplant Project
http://mysite.verizon.net/respa4eb/1980celicacobraproject