- Thread starter Azazello
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Cornish4
Le Dazzleur
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- Falmouth
Hello Andrea, while I don't claim to be an expert on these matters, I'm pretty sure the 845cc engine was normally fitted with the 32if7 carb. A friends F4 has one fitted which looks to be original. Replacing a 28mm with a 32mm does make a difference in power as borne out by the improvement to be found when the mod is done to a 1108cc GTL.
Regards, Brian.
Regards, Brian.
Azazello
habitué
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- 1,109
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- Italy
Thanks for your reply, Brian. .. in Italy not all 845 tl had the 32 carb... latest (from 80s) do, but models from end of 70s had 28 carb... and sometimes they have on the docume ts the same power, even with different carb! In a few days I hope to get My hands on a f4 which has the 28 carb and show you some photos...
angel
Enthusiast
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- 2,444
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- Athens, Greece
This carb was fitted together with a vacuum advance distributor and a different camshaft (slightly milder). Although maximum power remained the same, you can feel that the engine pulls noticeably stronger at the low to mid range.
Bear in mind that there were at least two different heads, later ones had larger diameter inlet ports. If you have the early head, chances are that the ports are small, and therefore you can't take the full benefit of the 32mm carb.
Bear in mind that there were at least two different heads, later ones had larger diameter inlet ports. If you have the early head, chances are that the ports are small, and therefore you can't take the full benefit of the 32mm carb.
angel
Enthusiast
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- Athens, Greece
If by "improvement" you mean top speed, it won't do any difference. If you mean "flexibiity", it will be better. If you mean "economy", generally it will be worse. Not because it is larger, but because it has an acceleration pump and it is not as forgiving to a "careless" right foot.
On the carb side of the head, among the head fixing bolts, there is a cast number in a circle. Can you check it on both cars? I am doing a survey for cylinder head identification.
On the carb side of the head, among the head fixing bolts, there is a cast number in a circle. Can you check it on both cars? I am doing a survey for cylinder head identification.
Fernando
Enthusiast
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here I am again Angel
ok I have all my engine in parts Im about to clean and paint the engine block
but you mention something very important here, and now Im curious about it,
my r4 its a solvenian built in 1991 and the exported to Portugal
I brought it brand new with 0 km
Im curious if I will take the full benefit of the 32mm carb
I brought a r5 camshaft to replace my original r4 so i can take full benefict of the 32 mm carb but I didnt knew at the time about inlet ports because Im not a mechanic.
So at this time, my head its beeing rectifyed at a professional, can you please help me to know if my inlet ports are smaller ones or the bigger ones?