Cylinder Head Differences

[Paul]

Is there any difference between an SRi/GTE/GSi head?

I am really hoping some one will tell me that they're all the same....

Paul

[burgo]

gte/gsi heads are the same but sri is different

[Snowface]

same shape ports i believe. And they are similar. I think the valves are different size.

[Paul]

BUMP

After reading Broody's post, I'm confused, im told here they're not the same

But Im told in the other post they are the same.

Anyone???

[Snowface]

they are very similar but obiously they are not THE same because if you use a 1.6 head on a 1.4 block then you are going to get much less compression.

Just as you would using a 1.4sr head on a 1.2.

a 1.6 head on a 1.4 will lose you power unless you skim it down quite a bit.

and vice versa. a 1.4 head on a 1.6 will raise compression quite a bit.

[Snowface]

if your still stuck with that explanation or want more info then you could ask someone like Bill Blydenstein or Cylinder Head Developments about it.

[benji]

i think the 1600 head'#s are taller, they have longer valve stems

[Paul]

will a SRi head give the same results as a gsi head on a 1600 lump?

Thats what im trying to get at...

[leebo]

so would i gane compression and power if i put a 1.0 head onto a 1.2 or is that just silly?

[burgo]

thats the kinda thing supernova would ask its that silly. heres a deal though if you manage it ill give you ?1000

[leebo]

lol cheers take it that its a bust from tyhe start then lol. when ya dont know much ya think silly thinigs

[Riggy]

so would i gane compression and power if i put a 1.0 head onto a 1.2 or is that just silly?

no sorry mate the 1.0 cant be used for anythin :(

stick with the 1.2 head as it one of the best heads anyway , if your after a little more power try a 1.3 inlet manifold with a 1.3 carb (or 32/34 webber if you can afford ) and get a exaust of a sr/gte this should see you up your power to near sr spec

[leebo]

cheers riggy, i have a 1.0 and due to a new set of 17" wheels and a boot build i think shes way to under powered so im for gettin a 1.2 in her and spicin her up a bit

[Riggy]

yeah you are right there the 1.0 isnt worth moddin at all engine wise , if your havin a 1.2 fitted it will feel a lot better but dont expect miricles from it unless you want to spend thousands on the engine like stu is doin ,

a 1.2 is a good engine for a new driver to keep the insurance down till you can afford it but if you just go the route above it will feel a lot better and not cost a fortune

but beware of the cons that you might think are peformance items eg max power stuff ,ripspeed item etc

as on a small engine they would make no difference at all and would be a waste on money :lol:

[leebo]

cheers, well i have a few wee gremlins thats y im restricked to low insurance groupls but all will be clear in a year and a half lol well that sounds good man. is the 1.2 a straight swap from a 1.0 (both carb) if ya know?

[Riggy]

nearly the engine will just drop in (might have to use the 1.2 mounts)
but you will have to change the petrol tank as the 1.0 does no have a return feed , you will also need to run this line from tank to engine

[burgo]

nearly the engine will just drop in (might have to use the 1.2 mounts)
but you will have to change the petrol tank as the 1.0 does no have a return feed , you will also need to run this line from tank to engine

you'll want the exhaust as well as the 1l comes out the back of the engine where as the 1.2 comes out of the front. i think you need the gearbox as well as the starter motor mounts differently with the 1l

[Riggy]

lol forgot about the exaust lol i just take it for granted that people know sorry :oops:

and yes you need gearbox aswell but you should get that with engine

[leebo]

good enough. i have a 1.2 spare but shes a dead duck but i have everything else. the car is still hole. would u reccomend a home engine change? i have the room and want to know how. have a few friends that can supply me with engine lifts or evin a full car lift if need be. so should i or should i not lol. if i was to put her in i have mechanic friend that would fine tune everything i need

[burgo]

it is an easy enough conversion to do at home, and drop the engine out the bottom as well. i took a 1l engine out in half an hour its that easy

[Riggy]

lol yeah id deffo do it at home its really easy i didnt even have a lift for mine we just picked car over engine and then jacked up on a trolly jack hehe :lol:

my old 1.2 engine http://img.photobucket.com/albums/v13/riggy4/general/IM000024.jpg


http://img.photobucket.com/albums/v13/riggy4/general/IM000025.jpg

http://img.photobucket.com/albums/v13/riggy4/general/IM000026.jpg

http://img.photobucket.com/albums/v13/riggy4/general/IM000027.jpg

http://img.photobucket.com/albums/v13/riggy4/general/IM000028.jpg

only took a day to do , although my g/box was screwed so it had to come of again the folowin day :twisted:

[leebo]

cheers so its out from the bottom and in from the bottom looms and all that stuff will be the same?

[burgo]

i think the looms are pretty much the same mate

[leebo]

cheers hi. is there a step by ste guide anywhere for doing a transplant so im just not going in ther blind lol