4G63T Valve spring Info

[BogusSVO]

just some quick info on stock replacement valve springs from SBI



Part Number #160-1280

Free length 1.910
O.D. 1.110
I.D. .754
Wire size .145x.178


Closed position
pressure & Length (intalled specs)
[email protected] Valve closed

Open position
Pressure & length Valve Open
[email protected]

solid height
1.100

The factory installed springs should be close to this also.

EDIT: I just checked 7 sets of used 4G63 valve springs, and only came up with 1 and a half sets of decent used springs.
Most springs checked between 45-55 Lbs @ 1.575
I would say a good spring should test at [email protected], Most spring manufactures, will allow 10% loss in spring tention for spring "break in"
I used a Rimac spring pressure tester.


Ferrea "beehive" Spring info


Specs on the springs
- Spring O.D. - 23.87mm / 28.07mm = .939/1.105
- Spring I.D. - 14.73mm / 18.85mm = .579/.742
- Seat Pressure - 90 lbs. @38mm = 1.496
- Open Pressure - 225 lbs. @28mm =1.102
- Rate Inch - 342 lbs.
- Coil Bind - 23mm =.905
- Max Net Lift – 13.5mm = .531
- Spring Material - PAC Alloy

http://www.extremepsi.com/store/customer/product.php?productid=21647&cat=1417&page=1

BC 1100 Valve spring info
Spring Pressure:
BC1100 Seat:
Colsed 1.500" @ 95 lbs /
Open: 1.000" @ 235 lbs /
Coil Bind: 0.935"
(no machine work required)

http://www.briancrower.com/makes/mitsubishi/4g63.shtml


GSC Power-Division 4G63T Beehive Single Spring Set
Spring Pressures :
Seat @ 1.56"=68 lbs / .300"=160lbs / .400"=190lbs / .450"=210lbs / .625"= Coil bind.

http://www.vr-speed.com/store/gsc-p...spring-set-1g-2g-dsm-evo-8-9-4g63-p-2046.html


Kiggley springs
97lb Seat Pressure at 1.440"

325lb/in Rate

http://www.shop.kigglyracing.com/product.sc?productId=2&categoryId=1




I will keep trying to add info as I find it.

 

[swifteagle]

What seat pressure are the bc at stock height?

 

[BogusSVO]

This info was orginaly posted in this thread.

http://www.dsmtuners.com/forums/cyl...valve-spring-service-limit.html#post153139267

1G spring, part number MD139243 wire diameter 3.70 mm (0.1457 inch)
2G spring, part number MD185870 wire diameter 3.80 mm (0.1496 inch)

1G being part number MD139243 and 2G part number MD185870 then checked each related FSM and found out that 1Gs have a service limit of 47.3mm while 2Gs have a 46.00 mm service limit

 

[BogusSVO]

Manely Dual Valve springs

Dual Spring & Retainer Kit Specs:
O.D./I.D.: 1.160"/.870" .865"/.660"
Seat Pressure: 104 @ 1.580"
Open Pressure: 175 @ 1.210" 237 @ 1.000"
Stock/Max Lift: 0.370" 0.460"
Coil Bind: 1.070"
Rate (lbs./in.): 359
STM: MANLEY 4G63 SPRINGS & RETAINERS | EVO VIII-IX | 90-99 DSM

 

[G-UNIT]

Bogus, what about hks springs?

 

[BogusSVO]

These should have been linked here.

http://www.dsmtuners.com/forums/cyl...omparison-stock-hks-bc1100.html#post152945194



http://www.dsmtuners.com/forums/cyl...2-evo-viii-stock-dsm-manley-brian-crower.html

 

[ariman]

Can I put delta k272 and rev upto 7000 rpm's with springs and retainers stock? or need upgrade springs and retainers.
Thanks

 

[BogusSVO]

Can I put delta k272 and rev upto 7000 rpm's with springs and retainers stock? or need upgrade springs and retainers.
Thanks

Sines those are the Delta clones of the Kelford Cams 272, you would need the same spring upgrade as the "name brand" Kelfords

 

[slo2spool]

Not to bring up the thread again, but weight has A LOT to do with valvetrain behavior. Valvetrain that weighs more will be affected more be inertia than valvetrain that weighs less. I run a good set of stock evo 8 springs with stainless valves, and I lost quite a bit of valvetrain weight. I lost 37 grams per valve/spring/retainer with stainless valves and evo springs.