Good day anyone able to list me the difference between engine type F113A anb F113B ? I think i've read somewhere that 113A has slightly higher CR than 113B ?? Tks beforehands Rgds Gianni
I have to disagree with the data shown on the red-headed site for both the F113A and F113B. From the OMs (and the emission part is confirmed by the corresponding wiring diagrams): F113A = 9.2:1 CR using K-Jet without Lambda (mechanical injection -- so the warm-up function is done by separately mounted thermomechanical warm-up regulators) and no emission control. F113B = 9.3:1 CR using KE-Jet without Lambda (electromechanical injection -- so the warm-up function is done by an electromechanical valve built into the fuel distributors) and no emission control. I'd give a slight premium to the F113B over the F113A -- JMO.
the first 360 tr's had different pistons and intake cams. I have driven both and the 113/a has more grunt and top end. An early euro non cat 113/a tr is probably as fast as a usa/cdn spec 512tr.
Tks . My TR has F113B with lambda and catalytic converter. i just wonder since the User manual appendice for my model says CR 8.8:1. Also have a spare long block F113A, and wanted to know the differences for a potential swap. Rgds Gianni
Interesting, Steve. Do you know if your information refers to US, Euro or Swiss versions? I've seen different numbers regarding the CR. If I find some time, I will check some sources ...
Hi Evdar, CR 8.8 as reported in my user manual refers to F113B Swiss version with Catalytic converters. From 1.1.87 all the new car imported to Switerzerland had to be equipped with 'cleaners' on the exaust. Believe the 1987 Swiss version is identical to US one. Incidentally also the gear box ratio is different for the catalized TR vs the not-catalized one. Power is reported to be 370 HP vs 390 HP. Rgds Gianni
I think the F113A and F113B are only used in the standard (a.k.a. "euro") and GB? versions. The others I've got are: US (F113A040), KE-Jet with Lambda, CR = 8.8:1, with emission control CH (F113A046), KE-Jet with Lambda, CR = 8.8:1, with emission control I've haven't ever encountered CH F113B046 yet, but I'd guess that it would also be the lower 8.8:1 CR if it was cat-equipped.
Gianni -- Can you clarify your question? Are you comparing: F113A vs F113B or F113A046 vs F113B046 or some other combination?
Tks Steve. Indeed my Swiss emission control docs states engine type F113B046. Do U happen to know if the increased CR on the cars without emission control was obtained by using different piston or simply with different head height ? Is a lower CR mandatory to meet emission parameter ? Tks again and rgds Gianni
I'm not sure how they achieved the different CR in the designs, but generally the emission equipped cars are a slightly lower CR (something to do with keeping the peak combustion temperature lower). I went back thru the CH TR manuals available on the Owners Site and need to correct myself: From TR OM 392/85: engine family F113A046 CR = not given KE-Jetronic without Lambda emission devices = air injection for cold running, but no cats From TR OM 467/87: engine family F113B046 CR = 8.8:1 KE-Jetronic with Lambda emission devices = air injection for cold running and cats From TR OM 519/88: engine family F113B000 (but I believe this is a misprint and should be F113B046) CR = 8.8:1 KE-Jetronic with Lambda emission devices = air injection for cold running and cats
Sorry for the mess i made. Actually have a car equipped with F113B046 (Swiss registered) and have in hand a long block F113A040. Since i will have to take apart the 113A040 anyway for checking conditions was wondering if at all sensible to get a bit more horses and put this engine in place of the 113B046. Before doing that wanted to check a bit on CR of the varios types. The confusion (and again sorry for that), was created by the fact i did not consider the numbers (040 and 046) after the F113 in the first place. It seems all engine with KE have 8.8 cr and the one with K-Jetronics 9.2/9.3. Tks again for info. Gianni
