I've always heard.."there's no replacement for displacement"
Anyways, the super cheap way to increase your top speed is by putting on larger tires in back. Don't laugh, I bought a pair of 13" wheels from the junkyard , put on a pair of cheap 185/75-13 and stuffed them in. I did this as "temporary" fix, untill I could find a 5spd and a new set of wheels. Actually, I have these tires on the car right now. (untill i get new tires for my other wheels )
You are probably just finding out that this car is relativly rare, with almost no aftermarket support. Have patience, do your research and the parts you want/need will eventually come around.
Good luck
angelo

my two cents too

although it does not reap HUGE benefits, i believe that freeing up the motor by removing some of the loads on it has a greater effect on smaller motors,
first thing to remove would be mechanical fan to be replaced by thermo but also freeing up flow with use of beter exhaust, GX head and as stated before better carburation and as you get more serious elec fuel and water pumps ect. (water pumps are expensive but try 4x4 wreckers for fuel pumps, i got two off a L28 patrol for only $40 , good pumps too though old)

i actually helped my mate put a 32/36 on his 1600 gemini and it made a great diffrence as the car lit up at high revs as the bigger carb was feeding it much better, people said without other mods to the motor the carb swap wouldnt make a diffrence but it sure did up high in the revs, though it leaves us wanting to improve the bottom end aswell so dont forget that (thermo fan will probably help a bit here), then theres the handling of a gemini but i wont go into that

doing this modifications how fast can it go???????????????'

plain and simple, blunt and to the point.......
how fast you want it to be will depend on how much money you can afford to spend, period.
there are no magic tricks, no secret ingrediants, and nothing that is really cheap that will help.
here in USAland they spend thousands of dollars to get a few extra horsepower.
sorry to say that the plain and simple truth is that how fast you want it to go will depend on how much you can afford.

sad to say but
naturaly aspirated engines are expensive to get power from

I love this guy....

Quote:

Faster than a stock one.