evans_corsab
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Registered: 23rd Sep 08
Location: Cheshire.
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hi there i have a 1.4 8 valve corsa and im thinking of putting on a 1.8 throttle body and a 1.6 inlet manifold , can i just wack this straight on ? or do i need to get the 1.8 ecu ???? any help would be spot on  
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chris_gilly
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Registered: 13th Nov 08
Location: Birkenhead, Merseyside
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(this is me guessing!) but if you use the 1.8 ecu it would overfuel like hel due to the smaller bore size... the inlet manifold will be bigger than the ports on the head so you'd prob have to file the port holes to match... then just run the 1.8 spi unit from the 1.4 ecu but reset it before using it so it can set itself up for the more amount of air going in!. i may be wrong.... this just seems like sense to me... anyway id like to know if im right or wrong as id like to do it on my 1.2 8v!
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evans_corsab
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Registered: 23rd Sep 08
Location: Cheshire.
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ahh ok sound think ill take a trip to the scrappy 2 moz and pic up the 1.8 throttle body and the inlet and go from there :thumbs : might ask kurt as he is running a 1.8 t/b and 1.6 inlet
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chris_gilly
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Registered: 13th Nov 08
Location: Birkenhead, Merseyside
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let me know to matey cuz if it works i will do it! were about are you from in cheshire? im not to far from you! so maybe i could help you, as im in collage doing my 3rd year of mechanics!
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evans_corsab
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Registered: 23rd Sep 08
Location: Cheshire.
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im from little neston , ahh cool im duin mechanics to but im on my second year ! cool yea ill get the 1.8 set up tomoz if the scrappy can provide and let you know
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marklawton
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Registered: 24th Apr 05
Location: Pensby, Wirral Drives:Golf mk4 GTI
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you can use the 1.6 8v inlet i think. plus maybe the cams, iam sure i read some where that you could
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evans_corsab
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Registered: 23rd Sep 08
Location: Cheshire.
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cool just spoke to my dad and he said probz be dirt cheap for the 1.8 set up so im guna get the 1.8 set up and see how that goes . if not 1.6 inlet . not to shure bout the ecu re set up isnt that the same as a re map ?
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evans_corsab
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Registered: 23rd Sep 08
Location: Cheshire.
User status: Offline
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im confuzzled now  my dads right in saying that the 1.8 set up will just soak my engine with petrol , so should i get the ecu aswell or get my car re mapped with that set up on ? cheers
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alan-g-w
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Registered: 9th Nov 07
Location: Glasgow
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If you're considering getting it remapped, for the money I'd personally prefer an exhaust.
And I don't see why you would need to get it re-mapped anyway if you're only changing the TB and inlet.
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evans_corsab
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Registered: 23rd Sep 08
Location: Cheshire.
User status: Offline
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it will over fuel tho so how do i reset my ecu , i thort re mapping was re setting the ecu for a different set up ??? :S help
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chris_gilly
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Registered: 13th Nov 08
Location: Birkenhead, Merseyside
User status: Offline
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no use the 1.4 ECU to reset it simply disconnect the battery for a few hours then connect it then let it idle for 20 secs DO NOT REV it sorted!
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chris_gilly
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Registered: 13th Nov 08
Location: Birkenhead, Merseyside
User status: Offline
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using the 1.8ecu will make the injector put more fuel in due to it thinking the engine is still a 1.8 (they use more fuel)!! so it will flood, if you use the 1.4 ecu it will adjust fueling to the bigger diamiter throttle body
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evans_corsab
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Registered: 23rd Sep 08
Location: Cheshire.
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ahhh ok ill try it out and let you know ! 
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evans_corsab
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Registered: 23rd Sep 08
Location: Cheshire.
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what college you at ??? 
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chris_gilly
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Registered: 13th Nov 08
Location: Birkenhead, Merseyside
User status: Offline
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before buying the ilet manifold measure the inlet ports on your head.. so you can compare theres no point using a bigger size manifold if its going to be restricted by the head smaller ports unless you port match
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evans_corsab
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Registered: 23rd Sep 08
Location: Cheshire.
User status: Offline
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im guna try the 1.6 8 valve inlet
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chris_gilly
Member
Registered: 13th Nov 08
Location: Birkenhead, Merseyside
User status: Offline
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probably best to! me i go to wirral met 12quays by woodside
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evans_corsab
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Registered: 23rd Sep 08
Location: Cheshire.
User status: Offline
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yeah , o cool im at capenhurst
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chris_gilly
Member
Registered: 13th Nov 08
Location: Birkenhead, Merseyside
User status: Offline
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im sure i know someone who does mechanics there!
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evans_corsab
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Registered: 23rd Sep 08
Location: Cheshire.
User status: Offline
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probably , im glad ive got this sorted now ive been wanting to do this for a while and there most against the idea at college !! .
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chris_gilly
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Registered: 13th Nov 08
Location: Birkenhead, Merseyside
User status: Offline
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at mine i can do all stuf like that to mine its coool!let me know how it goes. i will do it if yours turns of ok!!
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20valver
Banned
Registered: 14th Sep 08
User status: Offline
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get the cav 1.8 spi throttle body and either you can use the 1.4 inlet manifold and line it up to the cav 1.8 spi throttle body or a 1.6 inlet manifold and still line it up with the cav 1.8 throttle body but you can run the 1.4 spi injector in the cav 1.8 throttle body and still use the same ecu and yes re set the ecu when doing this mod,
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20valver
Banned
Registered: 14th Sep 08
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if you go to big on the inside diameter of the inlet manifold and inlet ports you will loose pressure and velocity
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20valver
Banned
Registered: 14th Sep 08
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quote:
Originally posted by evans_corsab
probably , im glad ive got this sorted now ive been wanting to do this for a while and there most against the idea at college !! .
but why are they against the idea at college
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luke85
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Registered: 26th Nov 07
Location: Chesterfield
User status: Offline
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You might as well shout at the ECU and tell it you have swapped the inlet for all the good that disconnecting the battery will do.
By all means fit the different inlet and throttle but you will need to keep the same fuel injector as you had before or as your dad says, it will be throwing too much fuel in and losing you power
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