[Supra Guy Scotty]

The small sticker can be found on both the '82 and '83 P-types I've had. Also the '83 L-type I had also. The '84 parts car I have has no sticker at all. The '86 does have the large sticker. As for your wrap around lights in the front and the backup light in the edges,.. look in your doorjam and see what MONTH your car was made. If it's after a certain month, it owuld have recieved the '84 styling stuff if I remember correctly. Could have been sold as an '83 but they had run out of parts, and already had to use the newer stuff. Or maybe it's been changed already down the line. Didn't the '84's have a 130mph speedo in it too instead of the 85mph one? Might be another way to check. But hey,... what do I know?!. Just going on hear say here..

Scotty

 

[TOYMAN321]

what is the actual mechanical difference between the L-type and the P-type that accounts to the 10hp difference?

 

[SupraFiend]

its just with the 84s, all the 85+ autos and ltypes were the same motor as far as I know. The pistons changed, as well as some ecu tunning and longer intake runners.

I've said it once and I'll say it again, I've seen several 84s up here with the 82/83 front end.

 

[Bamadawg63]

I know this is an old post, but I was reading last night about model changes (I have a '83 P-type), and it stated that the engine in the '84 went to 160hp due to a redesigned intake manifold. Something about it having a squared casting, which improved flow. I will try to search my history and post the link.

Cheers...
Nate

[EDIT]:
"In 1984, Toyota changed quite a bit on the Supra. Power output was increased on the 5-speed models with a bump up to 160 hp (119 kW) and 163 ft·lbf (221 N·m) of torque. The increase was achieved by a mixture of a redesigned intake manifold with "D"-shaped intake runners and an increase in compression ratio to: 9.2:1"

(Different pistons I would recon? Not sure if the bore was larger, or they used different dish pistons on the 5-spd 160hp'er.

 

[CJSREDPRA]

D-shaped intake ports are 1 item.

Other changed was the domed pistons, versus the flat top pistons on the older 5MGE's. It's all been discussed before.

Now of course when you get to the 6MGE's, then things change again. They went back to the flat top pistons, but the motor still retains the 9.2 compression.

 

[Bamadawg63]

From what I understand about performance engine building (limited as it is)... builders prefer to make higher compression with flat-top pistons and a head with a properly designed intake/exhaust chamber vs using domed pistons to increase compression.

What I understand about the 6M... it used a larger bore cylinder with a different stroke crank/rods to obtain the higher compression with flat-tops. I would guess of the two designs... the 6M would be more user-friendly as far as performance tweaking?

Nate

 

[Tanya]

What I understand about the 6M... it used a larger bore cylinder with a different stroke crank/rods to obtain the higher compression with flat-tops. I would guess of the two designs... the 6M would be more user-friendly as far as performance tweaking?

Nate

Incorrect. The 6M has the same bore, as well as the 7M, all are 3.27". The 6M and 7M are just stroked.

A few people have transferred the 9.2:1 domed pistons into their 6Ms to raise the compression to somewhere around 9.8:1 I believe.