BTR Platinum Spring Kit Vs. BTR PAC 1905???
05-29-2015, 10:56 PM
#1
Teching In
Thread Starter
iTrader: (1)
Join Date: May 2015
Location: Canada
Posts: 11
Likes: 0
Received 0 Likes
on
0 Posts
BTR Platinum Spring Kit Vs. BTR PAC 1905??? Considering BTR 0.660'' platinum spring kit as well as the BTR PAC 0.650'' 1905 spring kit. Is there a difference between the two springs quality wise, or are they fairly comparable? Which direction would you lean?
Thanks
Brandon
Thanks
Brandon
05-30-2015, 02:45 AM
#2
I went through the exact same thing a few months ago. I've read some threads where PAC springs broke and didn't want that. I ended-up buying the BTR Platinum Spring Kit w/steel retainers because there has not been any failures that I've read about.
06-03-2015, 01:24 PM
#6
Teching In
Join Date: Feb 2009
Location: Texas
Posts: 13
Likes: 0
Received 0 Likes
on
0 Posts
Brian Tooley springs are likely made by Peterson Spring in Michigan. PAC may be also....Peterson mentions "PacAlloy" in it's product line.
http://www.pspring.com/Valve-Springs
Either way, it's consistent source material, relaible manufacture process. I've only heard of a few PAC model # that failed. When they get a few-per-thousand fail, usually they can't be found on the manufacture website because they pulled them out of production to fix material issues.
Spring failures appear to be issues with source material or various errors of customer installation such as lack of "heat cycling" on 1st install or mismatch open-close pressure for the camshaft specs/grind.
Based on several websites, only a few (3+) original source manufacturers, then re-branded as PAC, etc. LS2.com, YellowBullet.com, LS1Tech.com.
http://www.pspring.com/Valve-Springs
Either way, it's consistent source material, relaible manufacture process. I've only heard of a few PAC model # that failed. When they get a few-per-thousand fail, usually they can't be found on the manufacture website because they pulled them out of production to fix material issues.
Spring failures appear to be issues with source material or various errors of customer installation such as lack of "heat cycling" on 1st install or mismatch open-close pressure for the camshaft specs/grind.
Based on several websites, only a few (3+) original source manufacturers, then re-branded as PAC, etc. LS2.com, YellowBullet.com, LS1Tech.com.
07-29-2020, 01:32 PM
#7
TECH Addict
iTrader: (1)
Old thread still relevant....... Brian Tooley springs are likely made by Peterson Spring in Michigan. PAC may be also....Peterson mentions "PacAlloy" in it's product line.
http://www.pspring.com/Valve-Springs
Either way, it's consistent source material, relaible manufacture process. I've only heard of a few PAC model # that failed. When they get a few-per-thousand fail, usually they can't be found on the manufacture website because they pulled them out of production to fix material issues.
Spring failures appear to be issues with source material or various errors of customer installation such as lack of "heat cycling" on 1st install or mismatch open-close pressure for the camshaft specs/grind.
Based on several websites, only a few (3+) original source manufacturers, then re-branded as PAC, etc. LS2.com, YellowBullet.com, LS1Tech.com.
http://www.pspring.com/Valve-Springs
Either way, it's consistent source material, relaible manufacture process. I've only heard of a few PAC model # that failed. When they get a few-per-thousand fail, usually they can't be found on the manufacture website because they pulled them out of production to fix material issues.
Spring failures appear to be issues with source material or various errors of customer installation such as lack of "heat cycling" on 1st install or mismatch open-close pressure for the camshaft specs/grind.
Based on several websites, only a few (3+) original source manufacturers, then re-branded as PAC, etc. LS2.com, YellowBullet.com, LS1Tech.com.
Trending Topics
07-29-2020, 01:42 PM
#8
Yes, I know this is an old thread. But it is still relevant today. I believe PSI and PAC are one and the same. Maybe 1 company bought out the other. I don't know. What I DO know is this; several weeks ago I went to PACs manufacturing facility (plant) in Southfield, Michigan. The sign in front of the offices said Petersen Spring, Inc.. I drove around back and there were PAC signs on the building. I asked an employee if I had PAC springs, or PSI. He said they are the same company. They are in the same building, for sure. I would wager PSI/PAC make a LOT of springs for BTR, Comp, TEA, Texas Speed, etc.. Just saying. Hope this clears this up. I think the BTR Platinum .660 springs are most likely polished up PAC 1905 springs. Brian would know for sure. Their specs are nearly identical.......
07-29-2020, 01:52 PM
#9
TECH Senior Member
PSI and PAC the same springs... no surprise since they are both well regarded for quality springs.
Bortous- I think at one time Isky might have made their own springs before good aftermarket ones were widely available. But it would have been very low volume due to the small size of the performance industry decades ago. It would serve them well in the present age to source them from a high-volume YET high quality vendor to keep costs down. I remember back in the day, performance valve springs cost a good bit more, relatively speaking.
Bortous- I think at one time Isky might have made their own springs before good aftermarket ones were widely available. But it would have been very low volume due to the small size of the performance industry decades ago. It would serve them well in the present age to source them from a high-volume YET high quality vendor to keep costs down. I remember back in the day, performance valve springs cost a good bit more, relatively speaking.
07-29-2020, 02:08 PM
#10
PSI and PAC the same springs... no surprise since they are both well regarded for quality springs.
Bortous- I think at one time Isky might have made their own springs before good aftermarket ones were widely available. But it would have been very low volume due to the small size of the performance industry decades ago. It would serve them well in the present age to source them from a high-volume YET high quality vendor to keep costs down. I remember back in the day, performance valve springs cost a good bit more, relatively speaking.
Bortous- I think at one time Isky might have made their own springs before good aftermarket ones were widely available. But it would have been very low volume due to the small size of the performance industry decades ago. It would serve them well in the present age to source them from a high-volume YET high quality vendor to keep costs down. I remember back in the day, performance valve springs cost a good bit more, relatively speaking.
07-29-2020, 03:23 PM
#11
ModSquad
iTrader: (6)
PSI and PAC the same springs... no surprise since they are both well regarded for quality springs.
Bortous- I think at one time Isky might have made their own springs before good aftermarket ones were widely available. But it would have been very low volume due to the small size of the performance industry decades ago. It would serve them well in the present age to source them from a high-volume YET high quality vendor to keep costs down. I remember back in the day, performance valve springs cost a good bit more, relatively speaking.
Bortous- I think at one time Isky might have made their own springs before good aftermarket ones were widely available. But it would have been very low volume due to the small size of the performance industry decades ago. It would serve them well in the present age to source them from a high-volume YET high quality vendor to keep costs down. I remember back in the day, performance valve springs cost a good bit more, relatively speaking.
The following users liked this post:
G Atsma (07-29-2020)
07-29-2020, 04:48 PM
#12
TECH Senior Member
07-29-2020, 09:42 PM
#13
Moderator
iTrader: (4)
Join Date: Jul 2014
Location: My own internal universe
Posts: 10,452
Received 1,852 Likes
on
1,152 Posts
Originally Posted by Che70velle
Isky still makes their own springs and is regarded as the largest camshaft manufacturer in the world.
07-30-2020, 06:46 AM
#14
ModSquad
iTrader: (6)
I honestly would not be surprised if they get gobbled up in the buy-out. I guess anything is for sale, for the right price.
The following users liked this post:
rkupon1 (08-02-2020)
The following users liked this post:
G Atsma (07-30-2020)
07-30-2020, 10:18 AM
#16
TECH Senior Member
As far as Isky being the largest cam grinder, possible back in the day, but I bet Comp outsells them nowadays... you can't beat mass merchandising, no matter the quality, or lack thereof...
07-30-2020, 10:22 AM
#17
Brian Tooley springs are likely made by Peterson Spring in Michigan. PAC may be also....Peterson mentions "PacAlloy" in it's product line.
http://www.pspring.com/Valve-Springs
Either way, it's consistent source material, relaible manufacture process. I've only heard of a few PAC model # that failed. When they get a few-per-thousand fail, usually they can't be found on the manufacture website because they pulled them out of production to fix material issues.
Spring failures appear to be issues with source material or various errors of customer installation such as lack of "heat cycling" on 1st install or mismatch open-close pressure for the camshaft specs/grind.
Based on several websites, only a few (3+) original source manufacturers, then re-branded as PAC, etc. LS2.com, YellowBullet.com, LS1Tech.com.
http://www.pspring.com/Valve-Springs
Either way, it's consistent source material, relaible manufacture process. I've only heard of a few PAC model # that failed. When they get a few-per-thousand fail, usually they can't be found on the manufacture website because they pulled them out of production to fix material issues.
Spring failures appear to be issues with source material or various errors of customer installation such as lack of "heat cycling" on 1st install or mismatch open-close pressure for the camshaft specs/grind.
Based on several websites, only a few (3+) original source manufacturers, then re-branded as PAC, etc. LS2.com, YellowBullet.com, LS1Tech.com.
Yes, I know this is an old thread. But it is still relevant today. I believe PSI and PAC are one and the same. Maybe 1 company bought out the other. I don't know. What I DO know is this; several weeks ago I went to PACs manufacturing facility (plant) in Southfield, Michigan. The sign in front of the offices said Petersen Spring, Inc.. I drove around back and there were PAC signs on the building. I asked an employee if I had PAC springs, or PSI. He said they are the same company. They are in the same building, for sure. I would wager PSI/PAC make a LOT of springs for BTR, Comp, TEA, Texas Speed, etc.. Just saying. Hope this clears this up. I think the BTR Platinum .660 springs are most likely polished up PAC 1905 springs. Brian would know for sure. Their specs are nearly identical.......
PSI makes a lot of Isky's springs, so does PAC, not the other way around.
The following users liked this post:
G Atsma (07-30-2020)
07-30-2020, 02:06 PM
#18
PAC does not make the BTR springs.
PAC and PSI are in fact 2 separate companies. PAC is in Southfield and PSI is in New Hudson. Who ever told you PAC and PSI are the same was very wrong. Now PAC and PSI are both very high quality springs and you cannot go wrong with either but I prefer a PAC.
PSI makes a lot of Isky's springs, so does PAC, not the other way around.
PAC and PSI are in fact 2 separate companies. PAC is in Southfield and PSI is in New Hudson. Who ever told you PAC and PSI are the same was very wrong. Now PAC and PSI are both very high quality springs and you cannot go wrong with either but I prefer a PAC.
PSI makes a lot of Isky's springs, so does PAC, not the other way around.
07-30-2020, 02:50 PM
#19
TECH Addict
iTrader: (1)
PAC does not make the BTR springs.
PAC and PSI are in fact 2 separate companies. PAC is in Southfield and PSI is in New Hudson. Who ever told you PAC and PSI are the same was very wrong. Now PAC and PSI are both very high quality springs and you cannot go wrong with either but I prefer a PAC.
PSI makes a lot of Isky's springs, so does PAC, not the other way around.
PAC and PSI are in fact 2 separate companies. PAC is in Southfield and PSI is in New Hudson. Who ever told you PAC and PSI are the same was very wrong. Now PAC and PSI are both very high quality springs and you cannot go wrong with either but I prefer a PAC.
PSI makes a lot of Isky's springs, so does PAC, not the other way around.
07-30-2020, 02:59 PM
#20
I got my information from someone who works there. My eyes saw a Petersen Spring Incorporated sign on the PAC building! I drove there, in person, to pick up my PAC Ti retainers. I didn't want to wait for a carrier to deliver them. I saw what I saw, and heard what I heard. I don't know anything about any other plant, but in Southfield, Michigan, they are in the same building........