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View Full Version : grey top black top...???

citroenaxgtr
10th January 2006, 04:57
is there much difference between the grey top heads and the black top heads?... reason being i was wondering if a cam from a grey top would go into a black top head!
b0t13
10th January 2006, 05:06
this isnt relevant but have you bought a furio this week?
Scott
10th January 2006, 05:09
yes very much different, i dont think a black top cam will fit a silver top in fact 99% positive
citroenaxgtr
10th January 2006, 05:10
nope i have a 1.1 ax i bought a vtr engine and i want to run it on carbs..therfore im trying to find the best and cheapest ways of doing so!
b0t13
10th January 2006, 05:14
ok nevermind then, just some git from swansea bought the furio i was gonna buy which really pissed me off, its was really smart...
Scott
10th January 2006, 05:29
why on carbs thats almost a step back wards smileys/smiley5.gif
Frevo
10th January 2006, 14:14
Not almost.. it is a step backwards.
Throttle bodies is what you want.

Also your car won't pass a MOT with carbs.
citroenaxgtr
10th January 2006, 20:46
serious ?... it wont pass an mot?... sheeehite thats wrong.. so what about all the old cars with carbs?
so how can i get this all to work?...
citroenaxgtr
10th January 2006, 21:02
if my car was registered in 91 im sure you are allowed carbs on older cars!.. besides its only a part time remedy to get the thing running!.
RIBstaff
11th January 2006, 01:05
my mate has got rid of injectors and is using a carb an that is a j reg it passed
citroenaxgtr
11th January 2006, 02:08
nice one ribstaff
Scott
11th January 2006, 05:08
you could set it to pass an MOT but then it will perform like wank.

Stop messing around, if you are going to convert the ax to a vtr then just do it right, if you cant do that initially then wait until you can, your opening a whole world of pain for yourself with talks of cam swaps and carbs.
citroenaxgtr
11th January 2006, 05:19
right, you have a very good point!. but being a 91 ax it is allowed to have carbs (ive been told, wether they are right or not is another thing). having carburettors in my eyes make things alot simpler, cheaper, bla bla bla.. i would love to get this engine running using the multi point injection but i am still waiting on the manifold. the bloke i bought the engine off says he is posting it but it hasnt arrived as yet. then i have to obtain an ecu, loom transponder and keys. that is gonna cost me.. i found my ax gt was pretty rapid as a 1.4 carb`d so i was wondering what a 1.6 gt would go like..
my guess would be "alot better" but thats just a guess!.
Scott
11th January 2006, 05:34
its not that its not allowed its that the fueling will be all over the shop causing the emissions to fail the mot
Ratty
11th January 2006, 13:36
if the car was an injection car and the mot place does its job properly then it will fail an mot with carbs. 91 is the last point carbs were used on the ax, and that was the early 91s, after that it was all fuel injection.

Some 91 ax gtis had cats on them by then, you cannot fit a black top cam in a silver top engine as one is roller rocker the other is not. Also the journal sizes changed. Black top didnt have knock sensor either.

if going multiple injection then go throttle bodies, carbs are old hat and have no correction for air temp (how does a carb know how hot the air is? answer, it doesnt, so it will always put the same amount of fuel in if the day is hot or cold. Not good if you have your car setup and jetted for a cold day then your car runs like a bag of crap when the summer comes.

TB's and fuel injection you can adjust all those and more.