New Valve Springs?
Thread Starter
Drifting
Joined: Jul 2006
Posts: 1,453
Likes: 7
From: Hanover Maryland
New Valve Springs?
When I had my car dyno'd it would nose over just a bit between 5000 and 5500 rpm and then pick back up and continue climbing to 6200. I spoke with a few people including the Tuner who modified the car and said it sounded like valve float and to get new springs.
It is an aftermarket cam with custom specs, and despite numerous messages, the shop has not gotten those specs to me.
How much of an impact do the specs have the springs needed? is it possible to pull the existing ones and figure out what to order from there? Can anyone recommend a good set.
Car is Stage 2 H/C dyno'd 438 rwhp on a dynojet and 405 rwhp (stopping @ 5k rpm due to above issue) on a mustang dyno
I appreciate the help!!!!!!
It is an aftermarket cam with custom specs, and despite numerous messages, the shop has not gotten those specs to me.
How much of an impact do the specs have the springs needed? is it possible to pull the existing ones and figure out what to order from there? Can anyone recommend a good set.
Car is Stage 2 H/C dyno'd 438 rwhp on a dynojet and 405 rwhp (stopping @ 5k rpm due to above issue) on a mustang dyno
I appreciate the help!!!!!!
Le Mans Master
Joined: Jul 2005
Posts: 7,121
Likes: 3
From: Shreveport/Bossier Louisiana
St. Jude Donor '08
When I had my car dyno'd it would nose over just a bit between 5000 and 5500 rpm and then pick back up and continue climbing to 6200. I spoke with a few people including the Tuner who modified the car and said it sounded like valve float and to get new springs.
It is an aftermarket cam with custom specs, and despite numerous messages, the shop has not gotten those specs to me.
How much of an impact do the specs have the springs needed? is it possible to pull the existing ones and figure out what to order from there? Can anyone recommend a good set.
Car is Stage 2 H/C dyno'd 438 rwhp on a dynojet and 405 rwhp (stopping @ 5k rpm due to above issue) on a mustang dyno
I appreciate the help!!!!!!
It is an aftermarket cam with custom specs, and despite numerous messages, the shop has not gotten those specs to me.
How much of an impact do the specs have the springs needed? is it possible to pull the existing ones and figure out what to order from there? Can anyone recommend a good set.
Car is Stage 2 H/C dyno'd 438 rwhp on a dynojet and 405 rwhp (stopping @ 5k rpm due to above issue) on a mustang dyno
I appreciate the help!!!!!!
Thread Starter
Drifting
Joined: Jul 2006
Posts: 1,453
Likes: 7
From: Hanover Maryland
Thread Starter
Drifting
Joined: Jul 2006
Posts: 1,453
Likes: 7
From: Hanover Maryland
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
A harmonic will cause this, what are the springs? Most aftermarket setups won't harmonic that low though. What are your seat and over the nose numbers? I would elect the PSI 1511 MLS springs, a beehive spring that should go well past 7K RPM when correctly setup. Very light and the titanium retainers for them are under 6 grams.
What are the details of the setup and can you post the dyno chart?
What are the details of the setup and can you post the dyno chart?
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