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INLET SIZE VARIES
Posted: Sat Jul 09, 2005 7:30 pm
by ZOMBIE
How come the ports on a 1litre inlet are bigger than the ports on a 1.3. Im in the process of boring out my coupe s inlet and am now reconsidering and just buying a 1 litre one and boring out the top face where it meets the carb.
More power bhp to be gained?? is my car restricted throught this??
HELP !!!!!!
Posted: Sun Jul 10, 2005 5:23 pm
by Tahrey1043
shurely it's t'other way round???
Posted: Tue Jul 12, 2005 8:41 pm
by polokris
its true... unless i got a "Random" inlet...
1.0 on the bottom.... 1.3 on top
gaskit on 1.0
Gaskit on 1.3
carb hole on 1.3 (rubber gaskit on)
1.0 hole for Carb... (rubber thingy off)
proof!
Posted: Tue Jul 12, 2005 11:11 pm
by Gareth_GT_Hatch
the 1.0 one is what all mk3 ones look like. (well they both have the big single hole) I never checked the port sizes when i swapped carb for injector wish i had now. My derby has some sort of single butterfly pierburg on it that would suit that manifold perfectly, but im not selling it.
Posted: Wed Jul 13, 2005 4:40 pm
by Phoenix
so does that mean with some modification you can put the inlet off a 1L onto a 1.3L
Posted: Wed Jul 13, 2005 11:12 pm
by ZOMBIE
What ive learnt:-
Apparently the 1.3 inlet will develop more torque as it has 4 individual small bore runners but will feel strangled at top end>the reason why the 1l one has bigger bores is so that it has a decent top end speed.
In theory any way!??
However I think the best mod is to just get a 1.3 inlet and port match the beginning of the ports to the engine so you dont sacrifice torque but will have beter gas flow into the head making the engine more powerful!
Thats what im doing anyway!
Posted: Mon Jul 18, 2005 7:02 pm
by Phoenix
wow thats good thinkin zombie!!!
might just have a go at that when my inlet comes off
Posted: Mon Jul 18, 2005 9:32 pm
by Tahrey1043
specs for the 1.0 mk2 do suggest its a bit more peaky than the injection, which is a lot closer to the more grunt-focussed nature of both the carb and injection 1.3s.....
hmmm
you sir, have just blown my mind
Posted: Mon Jul 18, 2005 10:39 pm
by ZOMBIE
Tahrey1043...for your benefit mate...I was at the scrappys and was dismantling a 1l I when I realised that both the ports on the head and inlet matched but the ports are smaller... I think so I dont know if thats any help to you...?
Posted: Tue Jul 19, 2005 6:29 pm
by Tahrey1043
nope still blown
you keep managing to come up with cool and amazing things that just baffle me completely zombers
matched, but smaller?
Posted: Tue Jul 19, 2005 6:56 pm
by Tigz
I wish my one litre head, was 16v.
I would swap it over to the 1400 before fitting it.
Thats a great mod if it works.