whats the difference in the "R" engines

[goerhea]

Maybe I'm just a little slow or uninformed but I was wondering what the difference is between the R1, R2, R3, and the regular engines is. Are they just built for higher performance or is it something else. Just curious.

[Warren Webb]

They are all high performance engines, just different degrees & rareity. The R-1 was the base Avanti engine that featured a more radical cam, 4 bbl carb, dual point distributor, heavy duty aluminum cam gear, dual exhaust, & a 10.25:1 compression ratio. The R-2 was basically the same except for a 9:1 compression ratio & a supercharger. the R-3 had a more radical cam, a higher output supercharger, cubic inches was increased to 304.5, carburator was enclosed in a pressure box & the engine was hand built in Santa Monica, California by Paxton Products & had to develop at least 335hp on the dyno before it was released. There was also an R-4 that was like the R-3, but it was naturally aspirated with dual 4 bbl carburators, also hand built by Paxton.

60 Lark convertible
61 Champ
62 Daytona convertible
63 G.T. R-2,4 speed
63 Avanti (2)
66 Daytona Sport Sedan

[goerhea]

thanks for the information. Did they all use the same block or was there a different block for the R3?

[Gunslinger]

My understanding the R3 and R4 blocks were essentially the same blocks but hand selected castings for thickness, strength and lack of core shift. They were specially machined and the heads were also special castings.

Just overboring a stock 289 doesn't make an R3 or R4.



Poet...Mystic...Soldier of Fortune. As always...self-absorbed, adversarial, cocky and in general a malcontent.

[silverhawk]

I know you didn't ask about it, but there was one experimental R5. It was essentially the same as the R4, but had dual superchargers along with the dual 4 barrels.

Dylan
'61 lark deluxe 4dr wagon

[goerhea]

thats interesting with the R5, do you know anymore about it, like what it was in or how well it worked?

[buddymander]

So, if I put a supercharger on my low compression 289 and add an extra distributor, should I call it an R2D2?

[Warren Webb]

The R-5 was experimental whereas the other R series engines were available to the public. The R-5 also had an aircraft fuel injection setup made by Bendix installed. The Avanti it was in did a 2 way average of around 196 mph if memory is correct. It was built by Paxton, Andy Granatelli oversaw the construction.

60 Lark convertible
61 Champ
62 Daytona convertible
63 G.T. R-2,4 speed
63 Avanti (2)
66 Daytona Sport Sedan

[PackardV8]

try the search function. it will give you weeks of reading.

thnx, jack vines

PackardV8

[BobPalma]

Limited R5 information, but accurate: Page 67 of February 2009 Collectible Automobile. BP

[candbstudebakers]

jack Vines some one here in the San Francisco area told me you were looking for a 53-54 "c" body car if so I have one for sale either e-mail me at candbstudebakers@sbcglobal.net or call 510-266-2522......Bob