boost pressure and valve springs

[Pony_Kegger]

well i have stock springs with 120000 miles on them and my trucks will make 50 spi of boost am i in jepordy of floating the valves and haveing contact with the pistion i am only turing 3000 rpm just need to know with i need to do about it

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2003 Std Longbed, FBD 5in Sewer Pipe With 05 Elbow, AirDog 150, Smarty Revo TNT, Edge EZ, Valair Ceramic Clutch With Billit Input Shaft, PRD S300/HT3B Twins, Head Studs, #80 Boost, Fuel Press, Oil Temp #40 Boost and Pyro. Water/Meth, 65 inch Custon Made Ladder Bars

[Drew]

the stock springs are good for 60# from what I have heard.

BTW, Ive had mine to a fully fueled 3500rpm and she sounded good

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04.5 6spd QC 4x4 4.10's line-x on the rockers, TST, smarty
10/20/07 425hp 798tq still on the stock clutch, how much longer will she last
Many Thanks to David and the guy's at James O'neal Dodge, you guy's ROCK!!!

[rufushusky]

Yeah stockers are good to 60psi and 3500rpm...above that you need some heavier springs.

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Dennis
04.5 Ram 2500 Reg Cab 4x4 5.9, 48re, AEM, Smarty, TS Ramifier, Banks High Ram,FASS HPFP, Boost/pyro/trans/FP/RP gauges, 5" Exhaust, Cat 2 micron fuel filter, Amsoil Bypass

[cerberusiam]

Originally Posted by rufushusky

Yeah stockers are good to 60psi and 3500rpm...above that you need some heavier springs.

Not!

At 50 psi and over 3200 rpm's is "borrowed" time.

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05 QC LWB 4x4 Auto 3.73 LSD Smarty, Quad Boost Fooler, Isspro Gauges FP-EGT-Boost-DP-Trans-RP

[rufushusky]

Originally Posted by cerberusiam

Not!

At 50 psi and over 3200 rpm's is "borrowed" time.

To be honest I would do them earlier too but people have run over 50psi of boost on stock valve springs and really I have not heard of failures. I agree it is less then ideal but can be done. If I was consistently running over 50psi I would get some better VS and head studs but for the short term I think you would be ok.

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Dennis
04.5 Ram 2500 Reg Cab 4x4 5.9, 48re, AEM, Smarty, TS Ramifier, Banks High Ram,FASS HPFP, Boost/pyro/trans/FP/RP gauges, 5" Exhaust, Cat 2 micron fuel filter, Amsoil Bypass

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Last edited by rufushusky : 06-30-2008 at 10:39 PM.

[Moobesor5.9L]

I have run up to 64lbs boost without problems. Yet I will be upgrading springs soon. I average 42 - 50lbs boost to keep things in check.

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2004 Cummins(235HP Model); BD RACE TWINS; 90 HP Nozzles; Twin CP3 PUMPS; TST Powermax; Smarty; Water/Meth; 4" Dual Exhaust; ATS Trans; Billet Input; Billet Flex Plate; Glacier Pump; 18" x 9" Helo Maxx Wheels; Terra Grapplers

[BBRam]

IMO, Get the springs!

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03-3500, DRW, QC, 4x4, DTT Trans, Mag-Hytec, R700 BD Twins, BD IC Boots, BD Billet Flexplate, Lockup Switch, SMARTY TNT-R BETA/TS MP-8, Eliminator Fuel System, Floor It Stage 3.5 CP3, F1 Flux ? Inj's, ARP Head Stud's, Springs, Fluidampr, ATS ARC-FLOW, AFE, Boost, Drive Pressure, Pyro, Fuel Pressure, Tran's Temp, Rail Pressure Gauge, GDP Ladder Bars, GR 7" Miters. Old #'s (R/T .021, 60' 1.76, 1/4 ET 13.14 @ 100.45 mph)

[cerberusiam]

Originally Posted by rufushusky

To be honest I would do them earlier too but people have run over 50psi of boost on stock valve springs and really I have not heard of failures. I agree it is less then ideal but can be done. If I was consistently running over 50psi I would get some better VS and head studs but for the short term I think you would be ok.

Not saying you can't do it or that it will die immediately, but, the guys I that have found issues are seeing little eyebrows in the pistons.

There is really no indication the pistons and vlaves are meeting until something breaks. When that happens its gonna be ugly!

It seems one can spin 3500 os so if the pressures are kept at 40 psi and under, or, 50 psi is doable but the rpms really need to stay at or under redline.

These are really guidlines for safe operation but it all varies from truck to truck.

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05 QC LWB 4x4 Auto 3.73 LSD Smarty, Quad Boost Fooler, Isspro Gauges FP-EGT-Boost-DP-Trans-RP

[rufushusky]

Originally Posted by cerberusiam

Not saying you can't do it or that it will die immediately, but, the guys I that have found issues are seeing little eyebrows in the pistons.

There is really no indication the pistons and vlaves are meeting until something breaks. When that happens its gonna be ugly!

It seems one can spin 3500 os so if the pressures are kept at 40 psi and under, or, 50 psi is doable but the rpms really need to stay at or under redline.

These are really guidlines for safe operation but it all varies from truck to truck.

Oh I totally get what you are saying. And upgrading the springs is the safest and polly the smartest thing to do in the long run.

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Dennis
04.5 Ram 2500 Reg Cab 4x4 5.9, 48re, AEM, Smarty, TS Ramifier, Banks High Ram,FASS HPFP, Boost/pyro/trans/FP/RP gauges, 5" Exhaust, Cat 2 micron fuel filter, Amsoil Bypass

[Pony_Kegger]

well at about 2600 rpm and 45psi the sound of the engine changes could this be the intake valves getting blown open if i have weak springs less of an engine sound and moe of a buzz when it does it

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2003 Std Longbed, FBD 5in Sewer Pipe With 05 Elbow, AirDog 150, Smarty Revo TNT, Edge EZ, Valair Ceramic Clutch With Billit Input Shaft, PRD S300/HT3B Twins, Head Studs, #80 Boost, Fuel Press, Oil Temp #40 Boost and Pyro. Water/Meth, 65 inch Custon Made Ladder Bars

[gus's 03]

easy way to tell: check your drive presure!
eaven at a 1:1 reatio, you are makeing enough boost/drive to open the valves by them selves, and i doubt in that range you are seeing a 1:1 ratio. i bet @ 50 psi you see 75psi drive or more. add rpm to the game and its just borrowed time.

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03 3500 4x4 HO 6SP 4.10's, 35" toyos, 18s, smarty TNT, H2O/METH, DDP 120's, DDP 66/14/74, 110lb springs, studs, diy fca, t/r mod, Blade runner, Glacier, MBRP, 5100's
574/1160 @ddp 3-07-08 tnt on #5