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 downunderxx
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| posted on May 13th, 2010 at 06:42 PM |
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Do I need new heads
After reading many of the sites recommended to me, I have found that the heads on my engine have small valves. The inlet measure app 32/33mm, and the
exhaust 31mm. Will these be too small for the upgrade from 1300 to 1600cc. It is a twin port engine and the heads look in really good nic, so it would
be a shame to have to replace them. I have to keep in mind this rebuild is for reliability over performance, as the car is my daughters.
Any thoughts?
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 Bizarre
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| posted on May 13th, 2010 at 06:46 PM |
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If that is a twin port 1300 i would be leaving it as it is
Every one i have driven easily goes as good as a 1600
What is the engine number??
Does it have stock exhaust?? twin heat riser pipes??
Futue te ipsum!!!
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downunderxx
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| posted on May 13th, 2010 at 07:02 PM |
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Definately twin port 1300, pistons 76mm ish. Engine # AC 002624, told by previous owner it was an import 20 odd years ago by original owner. I have
the original owners service manual as well with service stamps till 1973 at Clarence Amersinghe also has original engine and body numbers . I do need
to change piston rings and bottom end bearings it is fairly worn. Exhaust is stock, not sure what twin heat riser pipe is.
Another questuion while I'M here. Is the flywheel size measured by the diameter of the clutch plate?. Most I see are 200mm, where this one is 180mm.
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downunderxx
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| posted on May 13th, 2010 at 07:05 PM |
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Wow this car was from Sri Lanka!
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Bizarre
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| posted on May 13th, 2010 at 07:12 PM |
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does the exhaust heat risers look like this
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Futue te ipsum!!!
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Bizarre
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| posted on May 13th, 2010 at 07:14 PM |
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as opposed to the single heat riser like this??
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Futue te ipsum!!!
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downunderxx
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| posted on May 13th, 2010 at 07:22 PM |
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same as last pic
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Joel
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| posted on May 13th, 2010 at 07:31 PM |
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if they are the late 1300 TP heads and you want to keep them but fit 1600 P&C kit you'll have to have them bored out.
case is fine for 1600 kit though
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downunderxx
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| posted on May 13th, 2010 at 08:10 PM |
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I understand I will need to get the heads fly cut for the larger bore. Was more concerned with it breathing well enough with the smaller valves. I
guess this is a standard mod, so should be ok.
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Bizarre
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| posted on May 13th, 2010 at 08:42 PM |
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The 1300 twin port seemed to be a "get go" type of motor even though it has small valves
Guessing it is all to do with velocity and flow - but every one i have driven goes every bit and more better that most 1600's i have driven
Futue te ipsum!!!
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downunderxx
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| posted on May 13th, 2010 at 09:35 PM |
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All sounds good. I will just give them a clean up, match up ports with the inlet manifolds( you could see where the inlet manifolds met with a lot of
carbon build up) and re seat the valves, should be a good thing. Thanks guys.
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matara
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| posted on May 14th, 2010 at 07:47 AM |
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Barry, I've got a freshly rebuilt 1300DP in my 68 bug in Ireland, and it feels pretty gutless. It has a new H30/31 carb and 009, and it was
originally a 1300, so it has a 1300 gearbox. Underwhelming was the word I was looking for. Since the bottom end is all fresh, I was going to upgrade
it to 1600 when I get back there in July. It seems to have single heat risers on it. Here is a pic:-
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Bizarre
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| posted on May 14th, 2010 at 07:57 AM |
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Steve
wonder if they have the small valved heads??
I have driven a few at Mortlake that the boys have had and i have been impressed to say the least.
Snappy for a stocker has been my inpression
They were all twin pipe heat riser, alternator jobs.
Cant remember what carb was on them - see if i can find out
Futue te ipsum!!!
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