need some ideas for porformance

[dj_watt]

Hey all,

i am putting out a big challenge here, i am asking for some ideas on getting more out of a 4a-fc but there can be no turbos or superchargers.

what i was thinking of doing was either taking a 4a-ge or 4a-gz bottom recon it and then dump it in and then get a 4a-fc header and get that reconed but get the intake and exhaust ports bored out a bit. i think that might make it a 1.8L i might be wrong

any ideas???

thanks

[SuperRA]

Originally Posted by dj_watt

Hey all,

i am putting out a big challenge here, i am asking for some ideas on getting more out of a 4a-fc but there can be no turbos or superchargers.

what i was thinking of doing was either taking a 4a-ge or 4a-gz bottom recon it and then dump it in and then get a 4a-fc header and get that reconed but get the intake and exhaust ports bored out a bit. i think that might make it a 1.8L i might be wrong

any ideas???

thanks

I doubt you are going to get much or any increase by switching the bottom end. All the power comes from the head. That being said, if you do some porting work on your current 4afc head, you should see some increase even if only a little. The header should help as well.

I believe you are mixed up a little. "Boring" or porting intake / exhaust ports in the head doesn't make the engine displacement larger. Only boring the cylinders and getting pistons to match or lengthening the crank stroke increase displacement. That costs $$$.

What I'd do: Do your head work and get your header and run it with your stock bottom. You'd be amazed at what some people here have squeezed out of it. If you do somehow manage to break it, then go for a 4AG bottom.

[workerant]

or how about throw that money in for a more performance vehicle? Like a Camry or V6.

Do a few weight lowering would help too.

[eage8]

Originally Posted by workerant

or how about throw that money in for a more performance vehicle? Like a Camry or V6.

Do a few weight lowering would help too.

LOL, I would classify a camry as a "more performance vehicle" My corolla is a lot faster than my fiancée's V6 camry

if you're set on keeping the 4A-F I would just put a header/exhaust on it and put some webers on it. But I think you'd be much better of swapping the engine to a 4A-GE, there is a good bit more NA power available.

here is a good site about NA mods:
http://www.billzilla.org/4agmods.htm

[Donald]

All the 4A series bottom ends are 1.6L so you will gain nothing by swapping in any of those.

If you want to go to a 1.8L you need the 7A-FE bottom end. It should bolt right up to everything you have now, except your exhaust pipe. The down pipe will probably need to be lengthened, since the 7A block is taller than the 4A block.

That will probably be the best $ value upgrade you could do to a 4A-FC.

While you are it it, you could probably swap on a Webber 32/36 carb too.

I really don't know if anybody has ever done that mod. I have never heard of it, but it seems worth the effort.

[SuperRA]

Originally Posted by eage8

if you're set on keeping the 4A-F I would just put a header/exhaust on it and put some webers on it. But I think you'd be much better of swapping the engine to a 4A-GE, there is a good bit more NA power available.

I agree with this. Let me clarify my response. I'd only do what I said if I was bent on keeping the 4AF.

[PhatRoyale]

Originally Posted by workerant

or how about throw that money in for a more performance vehicle? Like a Camry or V6.

A Camry is not a performance vehicle. It's a midsize FWD family sedan.

[workerant]

^ the corolla I had when doing above 55mph it seem to be max out. While the Camry seem to have a little power left. And my V6 seem to be very happy doing above 70mph. And my V8, well.. it's a whole other vegetable.

So, by my personal experience with all the AT my Camry rate higher performance than Corolla, and they were both family sedan type. But the Corolla is a fun little car though.

[eage8]

Originally Posted by workerant

^ the corolla I had when doing above 55mph it seem to be max out. While the Camry seem to have a little power left. And my V6 seem to be very happy doing above 70mph. And my V8, well.. it's a whole other vegetable.

So, by my personal experience with all the AT my Camry rate higher performance than Corolla, and they were both family sedan type. But the Corolla is a fun little car though.

a big engine does not make a vehicle "a performance vehicle". it's a balance between power handling and lightness, a camry only has 1 of those things...

and my corolla has gone over 110... it's completely fine going 70...

[Flashmn]

a big engine does not make a vehicle "a performance vehicle". it's a balance between power handling and lightness, a camry only has 1 of those things.

it does? All I see is weight, average engine and family car handling...

[workerant]

To me, yes the Camry is heavier than corolla but the power part seem to makeup the different and exceed a little.

performance = power (more) + weight (less)

but without turbo and supercharge U kinda cripple the 'power' part of the equation right? All U have is weight.

[SuperRA]

LoL, I don't think your "Camry is better" argument is going to hold up here in the Corolla section of the forums...

[workerant]

Originally Posted by SuperRA

LoL, I don't think your "Camry is better" argument is going to hold up here in the Corolla section of the forums...

Fine, forget Camry... back on topic.

[eage8]

Originally Posted by Flashmn

it does? All I see is weight, average engine and family car handling...

lol, the engine isn't terrible, probably a bit slower than my impreza and my corolla... but faster than a stock corolla :-P

[Donald]

My V6 Camry wagon would make me smile (on the straights).
All it needed was a lighter better handling body.

Actually I've read somewhere that it is a better swap than a 3S-GTE, for the Gen2 MR2.
Just a bit more work to install.

I could go with that