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Title: What valve spring ? Post by: Elnef on October 25, 2014, 07:44:34 am I need a new set of valve spring for my engine but what brand will be up to the job ?
200/500 pressure Chevy size 1,550" 8500/9000rpm 17mm lift I have pauter heads ti valve and retainers John Title: Re: What valve spring ? Post by: MeXX on October 25, 2014, 09:23:58 am Dear John
Iīm using PSI brand and have about 40 sets in your range in stock... If U give me all information I can let U know which will fit. The other brands I would recommend is PAC and Manley NexTeC... So let me know... MeXX [attachment=1] Title: Re: What valve spring ? Post by: Elnef on October 26, 2014, 16:17:54 pm Thanks Mexx
what is lifetime on at set of psi spring in a engine like yours ? Title: Re: What valve spring ? Post by: MeXX on October 26, 2014, 20:26:31 pm Thanks Mexx what is lifetime on at set of psi spring in a engine like yours ? Hi John This is now the second set Iīm runninī and after this season (15 races ) there is no measurable difference. MeXX Title: Re: What valve spring ? Post by: Frallan on October 27, 2014, 10:36:21 am [/quote] Hi John This is now the second set Iīm runninī and after this season (15 races ) there is no measurable difference. MeXX [/quote] Simply meaning you have the right combination of spring, stress from cam, weight of components and driving skills. No valve float and not overstressed. That is pretty cool result for a record breaking car/driver! Congratulations! Title: Re: What valve spring ? Post by: Udo on October 28, 2014, 10:51:50 am I have heard the PSI springs work longer than k-800 for example. I will try them next year too
Udo Title: Re: What valve spring ? Post by: Greg G on November 30, 2014, 04:25:25 am I have had good luck with PSI springs on my motor. Lots of street miles too.
Title: Re: What valve spring ? Post by: Elnef on December 03, 2014, 06:24:55 am I have bought 2 set psi from MeXX :)
Title: Re: What valve spring ? Post by: dangerous on December 03, 2014, 21:06:11 pm Flat tappet or roller?
Which PSI spring did you choose? Title: Re: What valve spring ? Post by: Elnef on December 04, 2014, 06:12:00 am Flat tappet
Got this info from MeXX ISKY 9935 :The quality is superior because they are made by PSI exclusivly for ISKY! Title: Re: What valve spring ? Post by: dangerous on December 04, 2014, 09:48:05 am I have used those springs and they are brilliant!
I used them for roller cam however. Title: Re: What valve spring ? Post by: Shag55 on December 04, 2014, 17:22:36 pm I use the psi 1525 or 1525ml as the replacement for the K-800s
I have been using the 1512ml for a few years now on my street heads. Love them. Title: Re: What valve spring ? Post by: Jonny Grigg on January 07, 2015, 22:08:18 pm What are the specs of the 1525 as I can't find them on the PSI website :-\
Would the 1225 be a good replacement for the K800? I am also running 17mm of lift at valve with titanium valves. Thanks, Jonny. Title: Re: What valve spring ? Post by: Udo on January 08, 2015, 12:50:32 pm 1225 have more coil bind . so you need more installed height than k-800
Udo Title: Re: What valve spring ? Post by: Shag55 on January 09, 2015, 21:27:27 pm Sorry. I mis printed. I meant the 1225s
Title: Re: What valve spring ? Post by: Udo on January 12, 2015, 18:14:53 pm I have 1225 ML now - do not know the difference to S
Udo Title: Re: What valve spring ? Post by: Shag55 on January 14, 2015, 18:34:43 pm Same as std only diffrent heat treat and REM polish
Title: Re: What valve spring ? Post by: MeXX on February 21, 2015, 11:08:24 am I have 1225 ML now - do not know the difference to S Dear UdoUdo ML option is Maximum Life itīs a surface treatment like polishing and makes them less susceptible for stress cracking... it was developed for endurance racing like NASCAR. And last but not least the shiny apperance looks really great ;D ;D MeXX Title: Re: What valve spring ? Post by: MeXX on February 21, 2015, 11:28:21 am I use the psi 1525 or 1525ml as the replacement for the K-800s I have been using the 1512ml for a few years now on my street heads. Love them. Hi Shag I love them too,and there is a real reason to love them... ;D The 1525 (ML) is not only a replacement for the K800 itīs just the so much better option. Because it has a much lower spring ratio of 393 lbs/in but a due to itīs bigger length a higher max lift (.750), So you can preload them according to your lift to really high seat preassure without extrem nose preassure, helping the valvetrain being lighter and live longer. Just for compersion CT1225ML K800 Desc. Dual Dual O.D. 1.445" 1.460" I.D. Outer 1.060" 1.075" I.D. Inner .775" .782" Seat Pressure 179lbs@1.850 " 155lbs@1.850 " Open Pressure 435lbs@1.200 " 480lbs@1.200 " Rate Lb./In. 393 450 Retainer Step .070" .070" Max Lift .750" .700" Coil Blind 1.100" 1.085" MeXX |