Valve spring pressure

Ian Hill · 05-18-2010, 02:41 PM

i do have .003" clearance checked hot. My timing hasn't moved, the float was happening on the first run and the next four. richening the fuel helped but slowed the car down. I am wondering if anyone has info on going from standard style springs to bee hives. can you expect to use the spring pressure set up or is it natural to have to increase spring pressure with bee hives.

Ian

randy wilson · 05-18-2010, 02:45 PM

there's your problem. go back to your old style springs.

M&M Motorsports · 05-18-2010, 03:31 PM

Changed from regular springs to beehive. I have 200 lbs seat pressure and that is good to at least 7500 rpm. Hope this helps!

CrateCamaro · 05-19-2010, 05:54 AM

I have tried K-Motion K-700 springs (120 @ 1.700) and the Comp Cams 941-16 (130 @ 1.750) and they both work well. I had the comp springs in at 1.700 and they seemed to do the trick with the Sherman Lifters. I ran some more lash than you so that could be something to try.I never spun my engine as high as your trying to so that could be an issue as well. 7200 max. The only time it floated the valves is when I went to a smaller tire and it tried to go through higher. I never had titanium retainers and the springs were wipped at that time so it was an unfair test. Im not a firm believer in the bee hive springs yet but im kinda thinking that they are ok if you are trying to keep the valve train weight down. Id go back to basics and just order a set of 941's and jam them in. 7500 shouldnt be a problem with 140 on the seat. Are you running EOS in your oil? Probably a good idea with big spring pressure like that. I ran the Valvoline "not for street use" 20w50...6 quarts+1 EOS and never had an issue.Camshaft was MINT when I pulled it and so were the lifters.

PS...I miss my Vortec

Chris "drooze" Wertman · 05-19-2010, 08:41 AM

I dont know, I know they will work in an LS, the PAC 1409's Beehive Super Stock spring is a great spring and good and stable to over 8k, if you have room you can go to a different installed height and pick up some already killer rate and pressure.

Weve had the springs to over 8500 with no float.

Maybe worth looking into to see if they will work in your motor, and thats if they are allowed I know nothing of IHRA rules.

Quote:

Originally Posted by CrateCamaro

I have tried K-Motion K-700 springs (120 @ 1.700) and the Comp Cams 941-16 (130 @ 1.750) and they both work well. I had the comp springs in at 1.700 and they seemed to do the trick with the Sherman Lifters. I ran some more lash than you so that could be something to try.I never spun my engine as high as your trying to so that could be an issue as well. 7200 max. The only time it floated the valves is when I went to a smaller tire and it tried to go through higher. I never had titanium retainers and the springs were wipped at that time so it was an unfair test. Im not a firm believer in the bee hive springs yet but im kinda thinking that they are ok if you are trying to keep the valve train weight down. Id go back to basics and just order a set of 941's and jam them in. 7500 shouldnt be a problem with 140 on the seat. Are you running EOS in your oil? Probably a good idea with big spring pressure like that. I ran the Valvoline "not for street use" 20w50...6 quarts+1 EOS and never had an issue.Camshaft was MINT when I pulled it and so were the lifters.

PS...I miss my Vortec

Ian Hill · 05-19-2010, 01:22 PM

i am going to try another set 4.88's in the rear for this weekend, then i will creap in on the valve train. My converter slip comes out to almost 10%, so maybe my calculations on what i thought i should have been able to run is a little high. It is still my intension to see this baby turn 7500, i'll just have to wait. i run Amsoil racing 10 30 synthetic oil, should have loads of additives as far i was advised from the manuffacturer. the cam shaft looked so good from last we are reusing it this year.

Ian

05-18-2010, 02:41 PM	#1
Ian Hill Member Join Date: Sep 2008 Posts: 216 Likes: 0 Liked 6 Times in 3 Posts	Re: Valve spring pressure i do have .003" clearance checked hot. My timing hasn't moved, the float was happening on the first run and the next four. richening the fuel helped but slowed the car down. I am wondering if anyone has info on going from standard style springs to bee hives. can you expect to use the spring pressure set up or is it natural to have to increase spring pressure with bee hives. Ian

05-18-2010, 02:45 PM	#2
randy wilson Senior Member Join Date: Jan 2007 Location: N/A Posts: 882 Likes: 0 Liked 22 Times in 22 Posts	Re: Valve spring pressure there's your problem. go back to your old style springs. __________________ don,t have one

05-18-2010, 03:31 PM	#3
M&M Motorsports Member Join Date: Mar 2008 Location: Jerome, Michigan Posts: 119 Likes: 0 Liked 0 Times in 0 Posts	Re: Valve spring pressure Changed from regular springs to beehive. I have 200 lbs seat pressure and that is good to at least 7500 rpm. Hope this helps!

05-19-2010, 05:54 AM	#4
CrateCamaro Member Join Date: Nov 2007 Location: Ontario Canada Posts: 411 Likes: 1 Liked 19 Times in 7 Posts	Re: Valve spring pressure I have tried K-Motion K-700 springs (120 @ 1.700) and the Comp Cams 941-16 (130 @ 1.750) and they both work well. I had the comp springs in at 1.700 and they seemed to do the trick with the Sherman Lifters. I ran some more lash than you so that could be something to try.I never spun my engine as high as your trying to so that could be an issue as well. 7200 max. The only time it floated the valves is when I went to a smaller tire and it tried to go through higher. I never had titanium retainers and the springs were wipped at that time so it was an unfair test. Im not a firm believer in the bee hive springs yet but im kinda thinking that they are ok if you are trying to keep the valve train weight down. Id go back to basics and just order a set of 941's and jam them in. 7500 shouldnt be a problem with 140 on the seat. Are you running EOS in your oil? Probably a good idea with big spring pressure like that. I ran the Valvoline "not for street use" 20w50...6 quarts+1 EOS and never had an issue.Camshaft was MINT when I pulled it and so were the lifters. PS...I miss my Vortec __________________ Tony Valerio 1968 Camaro 1700 IHRA H/CM 1701 NHRA SS/?A

05-19-2010, 01:22 PM	#6
Ian Hill Member Join Date: Sep 2008 Posts: 216 Likes: 0 Liked 6 Times in 3 Posts	Re: Valve spring pressure i am going to try another set 4.88's in the rear for this weekend, then i will creap in on the valve train. My converter slip comes out to almost 10%, so maybe my calculations on what i thought i should have been able to run is a little high. It is still my intension to see this baby turn 7500, i'll just have to wait. i run Amsoil racing 10 30 synthetic oil, should have loads of additives as far i was advised from the manuffacturer. the cam shaft looked so good from last we are reusing it this year. Ian