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Location:
Sydney
Registered:
January 2005
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Silvertop and Blacktop differences
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Sat, 30 April 2005 02:22
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This is intended to clarify the differences between the two versions of the 20V 4A-GE engine. The earlier silvertop was fitted to the AE101 Corolla, and the later blacktop to the AE111. Both engines use one throttle body and five valves per cylinder.
AE101/Silvertop (~165hp)
* D-jetronic based ECU (flapper type AFM)
* 10.5:1 compression
AE111/blacktop (~170hp)
* L-jetronic based ECU (MAP sensor)
* 11:1 compression
* Increased lift in intake camshaft
* Different pistons
* Revised intake ports
* Revised variable valve timing
* Timing belt tensioner change
* Different throttle body to head insulator
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Location:
S.E suberbs, Vic
Registered:
December 2003
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Re: Silvertop and Blacktop differences
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Sun, 01 May 2005 07:42
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this should be added to the FAQ section,
anyway from what i heard in the blacktop they also had slighly larger exhaust ports, a smaller squish area in the combustion chamber, larger cutouts in the head for clearences next to the cam bucket to allow for a higher cam lobe and also of note is apparently the bolt spacing for the trumpets is curiously different by a few mm. Anything I missed or have wrong?
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Location:
wollongong
Registered:
March 2004
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Re: Silvertop and Blacktop differences
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Sun, 01 May 2005 08:01
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doesn't the blacktop have larger diameter throttles?
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Location:
qld
Registered:
December 2003
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Re: Silvertop and Blacktop differences
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Sun, 01 May 2005 08:17
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definately the black top has larger throttles. it also has lighter rods and a revised (lighter) engine block.
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Location:
Rep. Dominicana
Registered:
July 2004
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Re: Silvertop and Blacktop differences
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Sun, 22 May 2005 03:44
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AE101 4A-GE-20 (silvertop):
Intake lift: 7.97mm
Exhaust lift: 7.60mm
AE111 4A-GE-20 (blacktop)
Intake lift: 8.20mm
Exhaust lift: 7.60mm
After seeing this information.......
Can I use the Camshaft 20v Blacktop(Intake lift: 8.20mm)in my 20v Silver(Intake lift: 7.97mm)?
Can I use only the Intake 20v Blacktop in my 20v Silver?
That benefits can obtain?
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Location:
S.E suberbs, Vic
Registered:
December 2003
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Re: Silvertop and Blacktop differences
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Sun, 22 May 2005 11:43
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I think its odd that there were so many differences and only a sopposed 3Kw gain, it is true though that a blacktop has more low down power? how does it really feel different to drive? anyone?
also doesnt a blacktop have 11:1 compression compared to the silvers 10.5:1?
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Location:
Bundaberg, Qld.
Registered:
May 2002
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Location:
Sydney
Registered:
January 2005
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Re: Silvertop and Blacktop differences
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Sun, 22 May 2005 12:01
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From wat ive been told, the 11:1 ratio of the b/t makes it better for higher reving. so, im assuming that its got more lift at higher revs.
aswell i do beleive its got more torque, which would give it better 'go' at lower revs.
im not sure if this is 100% but this is wat ive been told, any corrections would help me to.
tah,
jason
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Location:
Brisbane
Registered:
May 2002
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Re: Silvertop and Blacktop differences
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Mon, 23 May 2005 08:26
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on the road, the blacktop and silvertop dont feel much different at all.
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Location:
Sydney, OZ
Registered:
May 2002
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Re: Silvertop and Blacktop differences
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Mon, 23 May 2005 09:50
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| Quote: |
Can I use the Camshaft 20v Blacktop(Intake lift: 8.20mm)in my 20v Silver(Intake lift: 7.97mm)?
Can I use only the Intake 20v Blacktop in my 20v Silver?
That benefits can obtain?
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Yes, this is what I have done... Benefits? well we'll just have to wait and see when it's in the car, but it's going to be a hard measure to compare with doing it to a standard S/T or even a B/T cause of headwork and a higher comp.
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Location:
sydney
Registered:
March 2003
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Location:
Adelaide
Registered:
May 2003
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Re: Silvertop and Blacktop differences
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Mon, 23 May 2005 11:47
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| Smokey228 wrote on Sat, 30 April 2005 12:22 |
Both engines use one throttle body
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Location:
Bundaberg, Qld.
Registered:
May 2002
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Re: Silvertop and Blacktop differences
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Mon, 23 May 2005 12:01
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| Smokey228 wrote on Sat, 30 April 2005 12:22 |
Both engines use one throttle body and five valves per cylinder.
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read it properly, 'per cylinder'. 
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Location:
Adelaide
Registered:
May 2003
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Re: Silvertop and Blacktop differences
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Mon, 23 May 2005 12:05
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Thats not real english, well i guess it is, just a messy way of saying it.
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Location:
Perth
Registered:
May 2005
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Re: Silvertop and Blacktop differences
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Mon, 23 May 2005 12:31
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I have a blacktop and allot of the power comes after 4500 revs until 8000. I had a go with the 5.0 V8 SS and it was pretty steady
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Location:
Sydney
Registered:
January 2005
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Re: Silvertop and Blacktop differences
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Mon, 23 May 2005 14:16
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| 20VBTSECA wrote on Mon, 23 May 2005 22:31 |
I have a blacktop and allot of the power comes after 4500 revs until 8000. I had a go with the 5.0 V8 SS and it was pretty steady
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i was bout to buy a s/t n do a turbo conversion, but i figured ill go n/a on my corolla and when i had the $$ get a ta22 n go forced.
anyway, im thinking a b/t for my rolla now. so the question would be, wat car u got that in, and wat u dun to it?! to keep up wif a ss is a good fcuken effort. id be happy wif that kinda power.. lol
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Location:
Brisbane
Registered:
May 2002
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Re: Silvertop and Blacktop differences
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Mon, 23 May 2005 22:34
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keep in mind the blacktop in AE92 is good for a mid-high 15sec quarter... They're not a drag car.
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Location:
Perth
Registered:
May 2005
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Re: Silvertop and Blacktop differences
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Tue, 24 May 2005 00:08
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If you plan on turbo later on down the track get either the Silvertop or the 4agze as you will need to replace those lightweight rods and pistons with something a bit stronger.
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Location:
tas
Registered:
June 2002
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Re: Silvertop and Blacktop differences
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Tue, 24 May 2005 02:47
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What are the chances of getting this nice 6 speed into an AW11 mr2?
has it been done?
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Location:
Sydney
Registered:
January 2005
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Re: Silvertop and Blacktop differences
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Tue, 24 May 2005 06:12
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| 20VBTSECA wrote on Tue, 24 May 2005 10:08 |
If you plan on turbo later on down the track get either the Silvertop or the 4agze as you will need to replace those lightweight rods and pistons with something a bit stronger.
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yeh, i was looking at s/t for a turbo conversion, im not a fan of the ze but. the b/t i would wanna go n/a.
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