silver top vs black top

flaresniper · 12-06-2006, 12:33 PM

WHATS THE DIFFERENCE!!

mr220v · 12-06-2006, 02:02 PM

The BT runs a little higher comp, bigger intake and exhaust ports, and most importantly, a lighter rotating assembly. The ecu is also a high rpm friendly tune vs the st ecu.

Its a little newer, and a little rarer than the ST. It is more expensive, but not by much.

mcmr2 · 12-06-2006, 03:04 PM

Can both engines use the standard 87 transmission?

How much hp do both produce also?

Daryl · 12-06-2006, 03:08 PM

Quote:

Originally Posted by mcmr2

Can both engines use the standard 87 transmission?

How much hp do both produce also?

Yes you can use the standard 87 transmission. You can also modify the new transmission to fit the mr2. http://www.padandwheels.com/mr2/blac...day13/c56.html

silvertop hp: 155
blacktop hp: 160

mr220v · 12-06-2006, 03:26 PM

The 87 tranny will physically fit, but lacks the intake side starter mount position. This is a problem if you plan on using the 20v header.

My personal opinion is that on an ST it doesn't make too much of a difference to use a 16v manifold. The st 20v unit is a little better, but the piping diameter is the same. On the BT however, the piping is a little larger in diameter for the larger exhaust ports, so using the stock 16v header here will be a problem, though if you don't mind a performance hit, can be done.

ST fwd trannys can be modded to work with the mr2. It involves drilling a hole for the selector shaft and oil seal. BT tranny's lack the oil seal casting, so cannot be converted as easily.

In general, with the ST you have a little more flexability.

mr220v · 12-06-2006, 04:02 PM

flaresniper · 12-06-2006, 05:05 PM

so i have a 89 MR2 manual. i can use my tranny and clutch on the BT correct with just modifying the header?

mr220v · 12-06-2006, 10:50 PM

88-89 had the additional intake side mount position. You have nothing to worry about with the later tranny.

12-06-2006, 12:33 PM	#1 (permalink)
flaresniper No Skills Join Date: Dec 2006 Posts: 2 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	silver top vs black top WHATS THE DIFFERENCE!!

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12-06-2006, 02:02 PM	#2 (permalink)
mr220v Beams Owners Group Join Date: Mar 2006 Posts: 1,791 Thanks: 13 Thanked 139 Times in 117 Posts iTrader Rating: (9/100% )	The BT runs a little higher comp, bigger intake and exhaust ports, and most importantly, a lighter rotating assembly. The ecu is also a high rpm friendly tune vs the st ecu. Its a little newer, and a little rarer than the ST. It is more expensive, but not by much.

12-06-2006, 03:04 PM	#3 (permalink)
mcmr2 Some Skills Join Date: Oct 2006 Location: atlanta, ga Posts: 67 Thanks: 1 Thanked 1 Time in 1 Post iTrader Rating: (0/0% )	Can both engines use the standard 87 transmission? How much hp do both produce also?

12-06-2006, 03:26 PM	#5 (permalink)
mr220v Beams Owners Group Join Date: Mar 2006 Posts: 1,791 Thanks: 13 Thanked 139 Times in 117 Posts iTrader Rating: (9/100% )	The 87 tranny will physically fit, but lacks the intake side starter mount position. This is a problem if you plan on using the 20v header. My personal opinion is that on an ST it doesn't make too much of a difference to use a 16v manifold. The st 20v unit is a little better, but the piping diameter is the same. On the BT however, the piping is a little larger in diameter for the larger exhaust ports, so using the stock 16v header here will be a problem, though if you don't mind a performance hit, can be done. ST fwd trannys can be modded to work with the mr2. It involves drilling a hole for the selector shaft and oil seal. BT tranny's lack the oil seal casting, so cannot be converted as easily. In general, with the ST you have a little more flexability.

12-06-2006, 04:02 PM	#6 (permalink)
mr220v Beams Owners Group Join Date: Mar 2006 Posts: 1,791 Thanks: 13 Thanked 139 Times in 117 Posts iTrader Rating: (9/100% )	.

12-06-2006, 05:05 PM	#7 (permalink)
flaresniper No Skills Join Date: Dec 2006 Posts: 2 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	so i have a 89 MR2 manual. i can use my tranny and clutch on the BT correct with just modifying the header?

12-06-2006, 10:50 PM	#8 (permalink)
mr220v Beams Owners Group Join Date: Mar 2006 Posts: 1,791 Thanks: 13 Thanked 139 Times in 117 Posts iTrader Rating: (9/100% )	88-89 had the additional intake side mount position. You have nothing to worry about with the later tranny.