Supra Forums banner
1 - 15 of 15 Posts

·
Registered
Joined
·
76 Posts
Discussion Starter · #1 ·
Dear Supra Pros,
Im in the process of rebuilding my 7mgte and i need help to the best parts for creating 500+hp. If i get the CP pistons with Eagle Rods, can i use stock Valves, seals and springs?
 

·
Registered
Joined
·
61 Posts
I'm not being an ass, but why would you want to use old parts on a new rebuild? Why not upgrade everything while your in there? Especially if your goals are over 500hp. Again, I'm not an expert here, I'm just sayin.
 

·
Registered
Joined
·
1,382 Posts
I upgraded to Comp Cams valve springs while my head was apart and am very pleased with the improvement over 200k stock springs.
 

·
Registered
Joined
·
1,382 Posts
define improvement over stock springs

(not trying to flame, just wondering)
The engine is MUCH smoother over 3000 RPM than it used to be. Not a power improvement just a smoothness improvement.

And I did not do the valves. From all the research I did larger valves aren't necessary below 500 HP in the 7M so I just cleaned my stockers really well and put them back in with fresh stem seals.
 

·
7M Fanatic
Joined
·
3,273 Posts
define improvement over stock springs

(not trying to flame, just wondering)
Stronger, and will take more lift.

From my data files:

Stock:
30lbs @ 34mm
36lbs @ 33mm (shimmed 1mm)
80lbs @ 26mm
87lbs @ 25mm (shimmed 1mm)

Comp Cams p/n 975-12 .697"ID, .953"OD
(TODA is .941"OD - Comp spring will press into bottom cup)
55lbs @ 38.1mm
60lbs @ 37mm (No OEM spring seat, just .015" shim with TODA inner shim) - TRD 10.75mm lift cams
77lbs @ 34.3mm
120lbs @ 26.5mm (No OEM spring seat, just .015" shim with TODA inner shim) - TRD 10.75mm lift cams
127lbs @ 25.4mm (this per comp cams)
Spring rate: 144 lbs/in. (5.67 lbs/mm)
Coil bind: 24.13mm
http://www.mkiiitech.com/forums/viewtopic.php?t=359
 

·
7M Fanatic
Joined
·
3,273 Posts
+1 on the comp cams springs, runs much smoother in the higher revs and doesn't taper off like it used to (as much).

sixpack: those stock figures, thats for intake/exhaust?
Yup.
I have never seen a difference between the stock In & Ex springs.
Same wire diameter, and over all length.
 
1 - 15 of 15 Posts
Top