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
June 14, 2022, 08:50 PM
Mike Rietow
quote:
Originally posted by Little Chief: 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
Camshaft specifications will be needed.
If you just need a brand suggestion, I like ISKY Tool Room springs.
June 14, 2022, 09:01 PM
B KING
quote:
Originally posted by Little Chief: 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
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.
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June 14, 2022, 09:35 PM
Little Chief
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.
June 14, 2022, 10:11 PM
Curly1
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.
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June 15, 2022, 08:57 PM
Little Chief
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
June 16, 2022, 08:06 AM
Bob Deniker
If they aren't broken, and it's running fine, I'd leave it alone.
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.
There is a spring suggestion at the bottom of the page, if so. Take care. Tom Worthington
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
June 16, 2022, 10:49 PM
Little Chief
I saw the same thing, but I flipped to the next page and the associated spring was over 700.
June 16, 2022, 10:54 PM
Little Chief
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.
June 16, 2022, 11:37 PM
Mike Rietow
quote:
Originally posted by Little Chief: 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.
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.
June 16, 2022, 11:52 PM
Mike Rietow
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.
June 16, 2022, 11:58 PM
Tom396
quote:
Originally posted by Little Chief: 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.
.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.
June 17, 2022, 06:36 AM
434 olds
PSI or PAC. Valve springs should calculated by weight, type of retainer, locks.
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June 17, 2022, 09:17 AM
Mike Rietow
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.
June 17, 2022, 09:48 AM
Mike Rietow
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,
This message has been edited. Last edited by: Mike Rietow, 