6G Celicas Forums

I've been looking around for info about the 20 valve silver top, like what coomer has. I was thinking that he said it was a rated 140 horespower motor,but everywhere I look I keep seeing the number 160 pop up. I thought that was what the 4agze motor was rated(160hp). I checked club4ag and got even more confused. I had no idea how many different 4age's there are. I didn't even think the black top was rated at 160hp?

first of all all the 4age's are overrated from the factory, secondly i dont know much about the NA form of the engine, i'm pretty limited to the gze. sorry

The AE101 silver top 4A-GE engine that I have is rated at 160 horsepower @ 7,400 RPM from the factory. The AE111 black top 4A-GE engine is rated at 165 horsepower @ 7,800 RPM. That said, Toyota's twenty valve 4A-GE engines were both over-rated from the factory.

so what HP do you actually have then Coomer? If it was overrated..are you pushing like 150?

I just hope that is more then the 110hp you had before.. plus you have engine now that can be tuned a lot better then the 7A...

dyno proven mk1 mr2 with silvertop 20V and c52 tranny had 120.9hp at the rear wheels

the blacktop was "170hp" and is much more of a beast of an engine than the silvertop is.... i believe the blacktop has higher compression, lighter internals (more of a n/a motor) and is MAP based rather than the silvertop's AFM harness....

the 4a-gze.... the early/US versions were 145hp at ~7psi... the later versions (including the DIS/map version) was 165hp around 12psi....

there are many variations of the 4age:

bluetop bigport: 16V, 115hp T-VIS - ae86 GTS, ae82 GTS, and mk1 mr2
redtop bigport: 16V, 112hp T-VIS - early ae92 GTS and mk1 mr2
redtop smallport: 16V, 130hp, non t-vis (higher compression... japan version of this was MAP based and 140hp), later ae92 GTS
silvertop: 20V VVT "160hp" - ae101 (japan only) levin/trueno
blacktop: 20V VVT(i?) map based "170hp" - ae111 trueno

early 4a-gze: 16V T-VIS 145hp ~6psi mk1 mr2 supercharged, early ae92 GTZ (japan only)
later 4a-gze: 16V non t-vis, map based, 10-12psi 165hp later ae92 and early ae101 GTZs (japan only)

(all above info is from my head.... not somewhere else.... many places online have wrong numbers)

I'm pretty sure the black top 4A-GE was rated at 165 horsepower @ 7,800 RPM. That's what I've read everywhere.

Later versions of the 4agze (ae101, ae92) did not boost at 12 pounds, they had 170 hp, boosting at aproximately 7-8 pounds. There are pully upgrades which can get you anywhere from 10 pounds of boost, all the way up to 14. With 12 pounds of boost I'd expect a jump in HP of around 30ish. (Putting it somewhere around 200 hp at the crank. )

This post has been edited by FAQdaWorld: May 4, 2004 - 4:51 PM

I think your being a bit optomisic about that power increase. An increase of 15-20hp would be closer to the mark.

Toyota nz have got the black top rated at 118kw(158hp) which is probably closer to the mark. A mate of mine had his ae101 FX-GT dynoed and that put down 89kw at the wheels. Only mod was an exhaust(2.25" i think). With an 18% powerloss thrown in that equals to about 110kw(147hp) at the engine. So i guess you could safely assume that a stock silvertop is somewhere betweem 100-110kw(134-147hp)

Hope that helps

I'm fairly confident that 4 more pounds of boost would give you roughly 30 more hp, and with the ae101 4agze you'd be baselining w/ 170 hp, so that puts u right about at 200 crank hp. In the end you'd prolly still only have 170 at the wheels, but its better than 144 hp at the wheels tho (Prolly what u'd have w/ the stock ae101 4agze.)

-Ryan

So your saying that midget supercharger is capable of giving an extra 7.5hp per additional pound of boost? I doubt it, that would mean my old ct20b would be at least 10hp per psi, and it sure as hell didnt do that.

Oh for whoever cares, another mate of mines stock GTZ levin put down 97kw(130hp) at the wheels.

They boost around 8-10 psi stock.... not 12... and certainly more than the old MR2 ones that boost 6-7 psi... The reason for their overall power increase... more boost and high compression with better ignition timing (DLI)... Anyways... 20V 4AGs are highly overrated... and don't expect them to dive anything like your old 7AFE...

12 might have been a bit high... as you can see there's a lot of confusion..

but don't forget, also, that they lowered the compression ratio on the later smallport gze's... so it would take more boost to make more hp, but better on the motor overall....

OK

Enough misinformation from all of us

hey kinda on the subject, i was watching SPEED channel the other day and they dynoed a corrola with the 4agze with a pulley upgrade to 12 psi, exhaust, and intake and the guy expected his car to put down at least 200 to the wheels and it only hit 140. HOWEVER i have read articles on dynos and this one magazine tested a 350z at like 7 dynos on one day and they got different numbers from every place. so i think the dyno under rated his car by at least 15 hp. dont know if any of you guys saw that ...

Preston

Yeah, unfortunately, all dynos will give out different readings.

if the black top is the best where could a person find one, I currently saving for a swap and that is the reason I am asking.

Damn that guy was dreaming if he thought that combo would get him 200hp at the wheels. 140hp sounds about right, thats around 170hp at the engine.

Once again it depends on the year of the 4agze, the later gen's had 170 hp at the crank stock.


-Ryan

that was eric lee's car.... and something was wrong with it... he didn't know at the time... but now the entire motor is completely shot.... the only thing salvageable on it is the cast block itself and the sc12....