4A-FE and 4A-GE 20V Max Power?

[niky]

Depends... it'd be easier, IMHO, to turbo a 4AGZE. I'm not sure the internals of the FE can take it, and you'd need very VERY good tuning to keep the thing from eating itself under boost.

There are tales of 160+ whp Nissan GA16s on stock internals, and Honda D16s running over 160 whp, both with turbos, but this is with professionally done turbo installs, which can cost as much as or more than installing a turbo or performance engine in the first place.

[speedyfix]

4afe should have no problem taking that kind of power.

160whp is weak na for a turbo single cam. we had a 1500cc honda engine with over 200whp on a stock block. also had a 1600 with 230whp before. and that's on a dyanmometer which reads low unlike some of the others that tend to read pretty high.

[the_wildthing]

All this sounds great. A former colleague said his 4A-FE had a turbo, though I didn't get to see it.

So what's common between all 4A engines? Is it just the block? Akala ko heads lang ang naiba sa GE.

And who can do a 4A-FE turbo reliably?

[m_ron]

to make the 4afe turbo reliable,what i mean is daily driven high boost you need to change the internals and maybe piggy back engine management is enuff and a good tuner.

[gearspeed]

Info about 4AGE engine

4AGE's came with either a "red top / small port" and a "blue top / big port" cylinder heads (which is 16 valve)
the earlier 4AGE 16 valve engines from 1985-1987 came with a "blue top / big port" head with a low compression 4 rib block (non reinforced).
then the later 4AGE 16 valve engine from 1988-1992 came with a "red top / small port" head with a high compression 7 rib block (extra reinforced).

as far as the 4AGE 20 valve (wich is the same 1.6L block w/ a 20 valve head) has the same size intake ports, but the only differences are the compression ratio of the block. the "silver top" 20 valve has a slightly lower compression ratio compared to the "black top" 20 valve which has a higher compression ratio, plus its has the VVTi system.

most common na ginagawa sa mga earlier 4AGE 16 valve engines is that their cylinder heads can be swapped on diff years. for example, as what we call it the 4AGE "big port" head / 7 rib block hybrid. which is bassically putting a older blue top head on the newer high compression 7 rib block (which also provides extra compression ratio & reinforcement)

usually, mas maganda ang "red-top / small port" high compression 4AGE for N/A (all motor) application. then yung "blue-top / big port" low compression 4AGE is better for turbo application (as long as you upgrade to Forged Pistons & Rods)

there is also a 7AGE hybrid, which is basically a 7AFE 1.8L block (found on USDM / JDM 1994-1998 1.8L Corolla's or Celica's) w/ a 4AGE head from the older AE86 / AE92 Corolla's (either a big port or a small port, depending on the set-up)

the advantage of the 7AGE hybrid is that you get the extra 1.8 liter displacement of the 7AFE block matched-up with the high revving 16 Valve 4AGE head.

anywayz, medyo mahaba na ito. well, heres some estimated HP figures on the 1st gen & 2nd gen 4AGE's.

1985-1988 4AGE 16V blue top / low comp = 125 hp
1989-1992 4AGE 16V red top / high comp = 140 hp
1993-1995 4AGE 20V silver top / high comp = 160 hp
1996-1998 4AGE 20V black top / high comp w/ VVTi = 170 hp

[niky]

4afe should have no problem taking that kind of power.

160whp is weak na for a turbo single cam. we had a 1500cc honda engine with over 200whp on a stock block. also had a 1600 with 230whp before. and that's on a dyanmometer which reads low unlike some of the others that tend to read pretty high.

But the one question is, is that boost pressure run on a daily basis? I've seen Nissan GA16's dyno past 230 hp (on stock internals, no less), but they're set to around 160-200whp or so for daily use.

But then again, old iron blocks are relatively good platforms to turbo, because they're a bit thicker-walled than newer, more modern engines.

[speedyfix]

that hp level was run day in a day out for at least 3 years before we removed the turbo kit when the car was about to be sold.

power really depends on the combination of parts and how you prep the engine.

[m_ron]

power really depends on a good tuner.When we're talking boost,how much psi are we talking about here?

[niky]

Wow... that's pretty impressive for a cheapo iron-block FE.

I'd wager it's about 8-12 psi for those power levels?

[m_ron]

Wow... that's pretty impressive for a cheapo iron-block FE.

I'd wager it's about 8-12 psi for those power levels?

I doubt it.

[niky]

Well, you never know, depends on the compression, I guess... for Nissans, 10-12 psi is about 200 hp... it might be up to 16 psi, I think, for the 323 1.6... yikes.

[m_ron]

well,if you have stock engine(ofcourse high compression)and you're running let say 8- 12 psi(no leak on piping,lol) of pressure that is not advisable.

[niky]

No duh! Bwehehe... but that's part of the fun...

[m_ron]

No duh! Bwehehe... but that's part of the fun...

It's like a ticking time bomb.KABOOM.