earl

This is the 1966 Indy car of Bobby Grim. It ran 500 miles at high boost and high speeds using a Garrett turbo. It used the Offenhauser 4 cylinder engine designed in the 1930's. Cubic inches was about 220.

Lots of familiar stickers on this car


Check this motor out. It had dual overhead cams with 4 valves per cylinder (sound familiar?). The really crazy thing was the head and block were one piece...no head gaskets to blow. It dominated Indy racing in the 50's and 60's. When Ford came out with their V-8 engine and started running faster than Offy, the Meyer Drake Offy guys started turbocharging their 4 cylinder engines. They ran it very fat and put a rumored 40 lbs of boost in it while still using a very high compression ratio from when they were all motor. Since it did not have a head gasket, no worries. It ran so fast that Ford pulled out of Indy because the 4cyl was beating their V-8 motors.

Note the roots supercharger on this pre turbo model

The downfall of this motor was when Indy put in gas mileage rules and gave each car X amount of gallons to run the race. They had to lean out the Offy so bad (to have enough gas to finish the race) that the engine would just plain run too hot and burn up. That was the end of the Offy era.

The Destroyer

How much power would they put out.

turboteg2nv

Now if only my history class at college taught stuff like this I wouldn't fall asleep all the time

Good stuff, my bro is a Ford guy so he'll get a kick out of seeing this

2SlowDC

damn that snail is as big as that dudes head

CRX_1.8T

JESUS!

i bet that thing hissed in his left ear like hell. in fact his ear probably bled from the noise... j/k

that is an interesting picture.

Snail Tuning

damn..... no head.

what kind of material were those engines made out of?

any internal shots?

SIXTYdashONE

I like how the Wastegate and downpipe blow right on the tire..

earl

And what a race tire it is

Kal

very nice.

boostedsol

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SIXTYdashONE &raquo;</TD></TR><TR><TD CLASS="quote">I like how the Wastegate and downpipe blow right on the tire.. </TD></TR></TABLE>

lol...

regardless, this is some good stuff earl.

Arturbo

11psiTurboSI

that's tight

Sonny

Cool stuff, earl!

Sonny

SiRkid

wow, never seen an indy car from that era well not one with a turbo sitting on the outside like that

grndcont

hey my last name is grim, and i had an uncle named bob. he even looks like me! time to go get some sponseres.

stackz

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by earl &raquo;</TD></TR><TR><TD CLASS="quote">And what a race tire it is </TD></TR></TABLE>

mmm bias-ply race tires.

lots of crazy engines back in the day. they actually tried mechanical fuel injection on those offy engines before quitting all together but they had more problems with the injection than the blow through carb setup. and they used single barrel carbs at that!

speedy108

Good post Earl. How much power did these cars produce?

Matgallis

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Looks kind of weird to me... turbo stays nice and cool out there

Finest

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SIXTYdashONE &raquo;</TD></TR><TR><TD CLASS="quote">I like how the Wastegate and downpipe blow right on the tire.. </TD></TR></TABLE>

Duh! That way, you don't need to run 1-2 laps to warm up the tires! Just rev it and go!

Awesome! Love the 1 piece head/motor design. Hmmmmm, no head gasket eh?

Blanket Jackson

Good find my friend. Those motors are so hard to find nowadays, I believe there is a museum in Boise with one of the one piece motors in it.

DIRep972

iTrader: (1)

Looks like a Turbonetics racegate on that thing. haha, bob norwoods favorite.

turbo*s2k

Interesting. Garrett goes way back!

earl

Yeah, Garretts been around forever.

integlspwr2k

iTrader: (3)

whats funny is that i bet the same technology used in those turbos are still used today.