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| SBC Valve Springs | Login/Join |
DRR Trophy |
Looking to replace my current valve springs before returning to the track. Is there a certain brand you lean to and also is there one to stay away from? It is a 414 ci. sbc with Brodix track 1 heads and Jesel shaft rockers. 7500 ish max rpm. Thanks for your Input | ||
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| DRR Top Comp |
Camshaft specifications will be needed. If you just need a brand suggestion, I like ISKY Tool Room springs. | |||
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| DRR Pro |
Did something change in your combination? If not, why not replace the same springs with new if there were no issues with the current ones. 1980 Camaro Taking the Best Working Small Tire Shyt Box & making it Greater Than Before! 3000 lbs. Pump Gas 436 | |||
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| DRR Trophy |
This engine was a complete rebuild last year. The valve springs are the last to be replaced and I have no idea what springs were used previously. | |||
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DRR Top Comp |
I think mine are the PAC 1225 and have been very good. .817 lift. https://postimg.cc/gallery/np3zpruo/ "Dunning-Kruger Effect" -a type of Cognitive bias where people with little expertise or ability assume they have superior expertise or ability. This overestimation occurs as a result of the fact that they do not have enough knowledge to know they don't have enough knowledge. Before you argue with someone ask yourself, "Is this person mentally mature enough to grasp the concept of a different perspective?" If not there is no point to argue. 4X NE2 CHAMPION. 2020 TDRA NE2 Champion | |||
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| DRR Trophy |
Mine is an Erson grind # R300/450 108 lobe separation, 675 int.645 ex @.050 duration intake 274 duration exhaust 282 designed for 1.50 rocker arm ratio. My Jesel are 1.60 | |||
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DRR Sportsman |
If they aren't broken, and it's running fine, I'd leave it alone. | |||
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| DRR Elite |
Call Erson, tell them what cam you have and have them give you their part# and specs for the springs which are made by either PAC or Associated then buy the equivalent PSI or PAC springs. | |||
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| DRR Trophy |
Yes I agree Ed, sounds like a solid plan. | |||
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| DRR Pro |
Is this the cam? From Erson online catalog There is a spring suggestion at the bottom of the page, if so. Take care. Tom Worthington If it seems that bracket racing has gotten too expensive for you, maybe you are just doing it wrong. | |||
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| DRR Pro |
Something is wrong in the matched components/springs. Max lift on the springs is .650, max lift on Intake of cam .675. Something is not right or I misread something. 1980 Camaro Taking the Best Working Small Tire Shyt Box & making it Greater Than Before! 3000 lbs. Pump Gas 436 | |||
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| DRR Trophy |
I saw the same thing, but I flipped to the next page and the associated spring was over 700. | |||
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| DRR Trophy |
Tom, that cam looks very close but the lobe separation on mine is 108 and I believe my 1.6 rockers add a small amount of lift over the 1.5 my cam calls for. | |||
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| DRR Top Comp |
Must be a special grind because it's not in the catalog. The specs you gave are alright light car 434 plus cu in with a 1.6 rocker on the intake, decent 23 degree cylinder head but I don't see it anywhere in the Erson catalog. Lunati makes a sbc roller cam with those specs, I've used in the past. | |||
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| DRR Top Comp |
Typically what I do in a case like you're talking, I buy two sets of springs in order to not have a bunch of leftover spring to coil bind on the exhaust. My camshaft is 720 and 660 as example, so I have a spare set of springs on deck currently, for that reason. | |||
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| DRR Pro |
.675 lift with a 1.5 rocker would equal .720 with a 1.6 rocker. Take care. Tom Worthington If it seems that bracket racing has gotten too expensive for you, maybe you are just doing it wrong. | |||
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DRR Sportsman |
PSI or PAC. Valve springs should calculated by weight, type of retainer, locks.  Worlds Quickest And Fastest 71 Cutlass On The Planet Earth | |||
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| DRR Top Comp |
What I mean to say is two different part #'s I have a ISKY Tool Room part# 9985 on exhaust - 660 lift ISKY Tool Room part# 9995 on intake - 720 lift When you do it like that, you'll have a full set on deck.  | |||
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| DRR Top Comp |
This is a good un, light car 434 plus. I did one in the 2000's 1.5 crane gold rockers on a set of Brodix T1 227's ported by the local porter who does my pump gas BBC intakes. 750 hp plus on gasoline. The car slowed down on methanol. So much for methanol being faster, not on an efficient engine it's not, gasoline is. This is a good un though - for run of the mill chit - ordinary.  This message has been edited. Last edited by: Mike Rietow, | |||
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| DRR Top Comp |
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