Escort GT engines

[wickmyster]

Does anyone know if a 1600gt camshaft is the same as a 1300gt camshaft. Also are 1300 gt valves are the same size as 1600 gt ones? Would a compression ratio of 10.2:1 run on 95? I am looking at buying a 1300gt engine and putting all the goodies onto a 1600 block. As most ford lovers know a 1300 pistons in a 1600 raise the compression and I am not keen on plaining the block. Any other info you have would be much appreciated.

Cheers Jamie

[peteretep]

according to my books, 1300gt cam/valve specs are

inlet - 272 duration, 8.66mm valve lift, 38.02mm diameter valve.

Exhaust - 272 duration, 8.56mm valve lift, 31.5mm diamter valve(same as 1100/1300).

I dont seem to have the 1600 specs though

I have never looked into it properly, but 95 at 10.2:1 sounds like a reasonable ratio

Also, if you dont have a haynes manual, then it would be a great idea to get one

[GT_Escortina]

as far as i can see in my books it looks like 1300GT and 1600GT cams and valves are the same spec..

hope this helps

i have all the part number if you want to be sure you have gt spec cam and head

[wickmyster]

Cool thanks for that guys....very good to know.

What octane would I need for 11.2:1 as i have read 1300gt pistons bring the ratio up to 11.2:1, does anyone know???

[Mike-e]

depends on how rich you run your fueling and how much spark advance you run

[wickmyster]

Would i get away with 95 with 11.2:1 if i set it up right?

[sholdowa]

On a standard bottom end??? I very much doubt it.

[Baxter]

Also depends on the GT engine - iirc there are at least 2 different GT cams (an earlier and a later one), and I'm pretty sure I've found different valve sizes as well. I think the valves were the same in the production years between the 1600GT and 1300GT, but not sure on the cams sorry.

[wickmyster]

Ok...Does anyone know what compression ration I will get if I put 1300gt pistons (which are 9.2:1 in a 1300) into a 1600??? I also have a set of 1300LC and 1300HC.

Which pistons should I use to get a compression ration of 10:1 in a 1600???

[cletus]

there are comp ratio calculators in the internetz here is one

http://www.rbracing-rsr.com/compstaticcalc.html

if you know the cc of the dish in the piston and the other relevant info you can figure it out on there

[ESKIN8R]

1300gt pistons fitted to a 1600 will give 11:1 compression ratio

[wickmyster]

Thanks Eskinator, good to know, guess I will not be using those then.

Does any one know what compression ration I will get with Standard 1300 HC and LC 1300 pistons in a 1600????

I am after about 10:1 in a 1600

[wickmyster]

Found out compression ratios for those who are interested (this is on another of my posts).

1300 LC pistons give a compression ration of 9.5:1 in a 1600

1300 HC pistons give a compression ration of 10.3:1 in a 1600

1300 Gt pistons give a compression ration of 11:1 in a 1600