gold top vs. black top b20's

[pedrosa]

hi, intake maifold are same, i´ve both. i´m sure that the serial nº and colour is only the diference

[snoopyloopy]

huh, am i lost or what. i know your edm engines have less hp but did i hear someone say that the jdm gold top b20a has 160hp and the jdm black top has 145hp?? as far as im concerned all b20as that came in jdm accords are both 160hp. only diffrence between the blacktop and goldtop i found is the intake manifold.
2 of my 3 gold top b20a engines have no EGR whatsoever
the blacktop i have got for snoopyloopy has no egr either
explain..
i have a stack of ph3 accord b20a ecus and a pj5 jdm b20a 2g lude ecu
all ecus apart from the blacktops one are the same. and the one ecu from the car with egr has to go with another car with egr. thats random

shit, no egr. does the b20a5 has an egr? bc i'm gonna try to get my b20a legal as a prelude motor...

[TWOLOUDNPROUD]

shit, no egr. does the b20a5 has an egr? bc i'm gonna try to get my b20a legal as a prelude motor...

The B20a5 and B21a have egr and it wont be that hard the make all legal.

[AccordB20A]

MY BAD snoopy it does have EGR. i musta been looking at the blacktop zc in my shed instead of your b20a woops but yeah... pics




i woulda got better fotos but being on home detention and the sheds out of my boundary so i snapped them in a hurry as to get back b4 the machine realised i was gone lol.

[AccordB20A]

and the b20a5 poolude manifold dont even bolt to the b20a aue..well the jdm one doesnt anyway..tryed that lol

[A18A]

whys the cambelt taken off?

[AccordB20A]

because i took it off to check camshaft differences between auto and manual cams but i never got around to it. so it still remains a mystery whether the cams are the same or different...

[AccordB20A]

any more info on this or is it deiceded that the black top is 145hp and the gold is 160 with the only difference being the ecu?

[EX-ileAccord]

so the ph3 I have for my goldtop may not work? I'm about to throw the thing over a clif, and this will be my braking poin im sure.

[bullard123]

Hmm It should work. I have the Pk2 ecu for my B20a from the 88-91 preludes

[A18A]

both gold & black top use PH3 ECU's, theres just a difference between the ones from gold tops & black tops as told in thegreatdanes post (i think)

[carotman]

any more info on this or is it deiceded that the black top is 145hp and the gold is 160 with the only difference being the ecu?

The only difference is the SAE measurements that changed in 1988. The Engines are the same internaly and externaly except that the black top has a dual runner intake, a better ECU and EGR. In theory it would make more power. It makes no sense that the blacktop makes 15 hp less.

[snoopyloopy]

MY BAD snoopy it does have EGR. i musta been looking at the blacktop zc in my shed instead of your b20a woops but yeah... pics




i woulda got better fotos but being on home detention and the sheds out of my boundary so i snapped them in a hurry as to get back b4 the machine realised i was gone lol.

oh shoot, i never even saw these pix. looks good, should be nice candidate for my development plans. :)

[A18A]

therefore black top b20 is for the sex :P

[snoopyloopy]

well, we've all seen the red top b20 and what it's capable of...

[AccordB20A]

the blacktop b20a has a different head to the gold top b20a.
and im certain i could notice less power by using blacktop cams in a gold top. but nowhere in the accord manuals does it say that theres 2 different b20a engines. Might have to get a JDM prelude 2.0Si manyal for the B20A specs cause the manual i have is for a 1989 blacktop b20a

[bullard123]

So you think that the extra 20hp that the goldtop has is because of the head? Maybe I can compare the teo when the other one gets here

[AccordB20A]

well the castings between the blacktop and gold top heads are different. Dont know why. Block appears to be the same.

[carotman]

Do you have any example of this? They use the same valves so I expect the head ports to be the same too.

[AccordB20A]

Scrapped the blacktop head that had the bent valves without taking a damn photo. Maybe next time.

[TWOLOUDNPROUD]

I have a gold top head and next month when i pull out my black top i will pull the head off of it and put them side by side and take some pic's and post them.

[Ichiban]

The only difference is the SAE measurements that changed in 1988. The Engines are the same internaly and externaly except that the black top has a dual runner intake, a better ECU and EGR. In theory it would make more power. It makes no sense that the blacktop makes 15 hp less.

I agree with what you're saying, but wouldn't the A20A3 also see a corresponding drop in output as well, not a 12 hp increase? Or was it a jurisdictional change?

[TWOLOUDNPROUD]

The only difference i can see between the gold and black top is the black top has flat top pistons and the gold top has dish pistons.

[2oodoor]

Has anybody actually had a dyno done on their b20a gold or black top?
I was trying to find a thread here where somebody mentioned Japanese gas was high in octane so that is why they say 160 hp, it was an arguable statement at best. The basis of that argument would be saying you could gain 30+ hp by using 103 and tuning to 103... hrmmm
So is it really 160 hp?

[Hauntd ca3]

i dynoed mine and ran 105 hp @ the whels at 5500 rpm and it stayedd that til redline
it has 285,000km on the clock tho
mine you the k&n pod ,headers and 2.25 inch exhaust would have helped a bit.
but the fact it NEEDED a service,plugs, fuel filter and alowing the ecu some time to recalibrate to the exhaust wouldnt have
i fin the exhaust,drove cross the workshop to the dyno and ran her up.
should have driven t round for a while first