3.6T Suspension Upgrade - Need advice on settings
#16
#18
Straight from the tirerack.com web site.
Front Left: F4-VE3-5277-H0
Front Right: F4-VE3-5278-H0
Rears: F4-B46-1547-H0
NB: The actual versions shipped all end in H1 instead of H0.
H&R Red Springs: 29834
Ignore the photos on the website next to the product description.
The total cost including Fedex 2 day shipping to my friends house in Los Angeles was approx. 1058$ USD. The products ship from tirerack's Reno Nevada warehouse.
Rgds,
John
#19
Rennlist Member
I have H&R springs and shocks.
When I purchased my car it was 116 in the front (measured at the front crossmember bolt head) and 226 at the rear(measured at the casting boss on the rear trailing arm). In Adrian's book he lists RS height at 125 in the front and 218 in the rear. He shows the same values for the Turbo S but I believe that the S was possibly 15 mm lower in the front.
Even at 116 in the front there was two inches of thread to go so I could have dropped down to "S" height with no problem.
Here's a picture of the car before I raised the front:
When I purchased my car it was 116 in the front (measured at the front crossmember bolt head) and 226 at the rear(measured at the casting boss on the rear trailing arm). In Adrian's book he lists RS height at 125 in the front and 218 in the rear. He shows the same values for the Turbo S but I believe that the S was possibly 15 mm lower in the front.
Even at 116 in the front there was two inches of thread to go so I could have dropped down to "S" height with no problem.
Here's a picture of the car before I raised the front:
A true test for RS ride height. When looking at the arch at eye level the tops of the tires should be covered by the arch. You should not see any light or be able to fit anything between the wheel arch and the top of the tire. If you can you are not at RS or 92 turbo S height.
Last edited by cobalt; 09-04-2008 at 12:55 PM.
#20
Thunderc4s!
Looking at your First picture you posted,that set up is the exact same as mine and where your spring platforms are sitting just now on the shocks in the picture that is also close to where mine are just now on my car and should be a good starting point for you before you start to fine tweek when fitted!
Yet again and as others on here have clarified with the same set up!
1/ No excess Bumpsteer at this setting
2/ It will NOT be a bone-jarring ride(actually far better ride than your old standard set up)
Great purchase you have made there,,especially at those cheap USA prices
__________________
Porsche inspector for Peter Morgan UK
http://www.petermorgan.org.uk/inspection.htm
"92" 964 turbo,recently rebuilt using all ARP hardware.Modified heads,SC cams 1 bar boost,headers,wastegate/ tial 0.8 spring to acheive 1 bar,cat bypass,own adj wur,rpm switch,powerflow air intake..bilstein hd with h&r springs,front carbon strut brace
Looking at your First picture you posted,that set up is the exact same as mine and where your spring platforms are sitting just now on the shocks in the picture that is also close to where mine are just now on my car and should be a good starting point for you before you start to fine tweek when fitted!
Yet again and as others on here have clarified with the same set up!
1/ No excess Bumpsteer at this setting
2/ It will NOT be a bone-jarring ride(actually far better ride than your old standard set up)
Great purchase you have made there,,especially at those cheap USA prices
__________________
Porsche inspector for Peter Morgan UK
http://www.petermorgan.org.uk/inspection.htm
"92" 964 turbo,recently rebuilt using all ARP hardware.Modified heads,SC cams 1 bar boost,headers,wastegate/ tial 0.8 spring to acheive 1 bar,cat bypass,own adj wur,rpm switch,powerflow air intake..bilstein hd with h&r springs,front carbon strut brace
#21
Rennlist Member
A true test for RS ride height. When looking at the arch at eye level the tops of the tires should be covered by the arch. You should not see any light or be able to fit anything between the wheel arch and the top of the tire. If you can you are not at RS or 92 turbo S height.
I'll post a picture of my coilover tomorrow.
#22
I am not sure what the point on lowering your suspenion to that point. The center of gravity on the 965 will most likely be below the gound. Not very effective. Also if you are running after market headers you are pushing the heat exhcangers very close to the ground. Under hard acceleration you can get super close to hitting any road irregularity. With the power my car develops (625HP+)my car squats to the point the front wheels feel like they come off the ground. I can not argue the look, amazing.
#23
The instruction sheet for the H&R reds mentions to trim .75 inches from the front bumpstops. Is this required ?
Thunderc4s!
Looking at your First picture you posted,that set up is the exact same as mine and where your spring platforms are sitting just now on the shocks in the picture that is also close to where mine are just now on my car and should be a good starting point for you before you start to fine tweek when fitted!
Yet again and as others on here have clarified with the same set up!
1/ No excess Bumpsteer at this setting
2/ It will NOT be a bone-jarring ride(actually far better ride than your old standard set up)
Great purchase you have made there,,especially at those cheap USA prices
__________________
Porsche inspector for Peter Morgan UK
http://www.petermorgan.org.uk/inspection.htm
"92" 964 turbo,recently rebuilt using all ARP hardware.Modified heads,SC cams 1 bar boost,headers,wastegate/ tial 0.8 spring to acheive 1 bar,cat bypass,own adj wur,rpm switch,powerflow air intake..bilstein hd with h&r springs,front carbon strut brace
Looking at your First picture you posted,that set up is the exact same as mine and where your spring platforms are sitting just now on the shocks in the picture that is also close to where mine are just now on my car and should be a good starting point for you before you start to fine tweek when fitted!
Yet again and as others on here have clarified with the same set up!
1/ No excess Bumpsteer at this setting
2/ It will NOT be a bone-jarring ride(actually far better ride than your old standard set up)
Great purchase you have made there,,especially at those cheap USA prices
__________________
Porsche inspector for Peter Morgan UK
http://www.petermorgan.org.uk/inspection.htm
"92" 964 turbo,recently rebuilt using all ARP hardware.Modified heads,SC cams 1 bar boost,headers,wastegate/ tial 0.8 spring to acheive 1 bar,cat bypass,own adj wur,rpm switch,powerflow air intake..bilstein hd with h&r springs,front carbon strut brace
#25
Rennlist Member
I am not sure what the point on lowering your suspenion to that point. The center of gravity on the 965 will most likely be below the gound. Not very effective. Also if you are running after market headers you are pushing the heat exhcangers very close to the ground. Under hard acceleration you can get super close to hitting any road irregularity. With the power my car develops (625HP+)my car squats to the point the front wheels feel like they come off the ground. I can not argue the look, amazing.
Judging from how low the 964 guys run their cars on the track, I don't think the roll center will end up under the road surface. Bump steer is a much bigger concern (which is solved by using the 993 EVO GT2 uprights and tie rods). Lowering the car will lower the center of gravity, which is a good thing because it reduces body roll. Also, the roll center of the front wants to be below the rear roll center to stop oversteer.
I don't run headers so I don't scrape.
#26
Rennlist Member
Changing over to 993 GT2 Evo uprights is a different story. Spoke to my mechanic this weekend and he said ain't happening unless expensive mods are done and why would I want to.
I know I am being obstinate here and apologize in advance but I know the silver turbo S I pictured is set to factory RS height these pictures show you the difference I was talking about. The turbo S sits considerably lower
I know I am being obstinate here and apologize in advance but I know the silver turbo S I pictured is set to factory RS height these pictures show you the difference I was talking about. The turbo S sits considerably lower
#27
Rennlist Member
Changing over to 993 GT2 Evo uprights is a different story. Spoke to my mechanic this weekend and he said ain't happening unless expensive mods are done and why would I want to.
I know I am being obstinate here and apologize in advance but I know the silver turbo S I pictured is set to factory RS height these pictures show you the difference I was talking about. The turbo S sits considerably lower
I know I am being obstinate here and apologize in advance but I know the silver turbo S I pictured is set to factory RS height these pictures show you the difference I was talking about. The turbo S sits considerably lower
About $1800 worth of "mods". If the bump steer doesn't bother you don't do it.
Where my car sits in that picture the front was 116 mm and the rear was 226 mm. This is measuring where Porsche says to measure ride heights at (bolt head on the front crossmember and casting boss on the rear trailing arm). The Turbo S must be 108 mm and 210 mm, which is below RS (140 and 230 mm respectivly).
But hey, don't take my word for it; go and measure your own car. I'm curious to see what height it's at.
#29
Rennlist Member
I know you can get close with the JIC's, unlike the Bilsteins they are fully threaded. Although I have gone over this with several mechanics and 2 cars running the Bilstein HD's and H&R reds. How is it I have 2 cars with identical suspensions as described by the OP that are lowered to their max and cannot do what others say can be achieved using stock components and these upgrades? This is the clarification I am looking for. If I can't do it on 2 cars that is proof enough for me it can't be done with this setup. Something is being missed here or is being changed to make this work.
I am not saying you can't lower a 3.6T to RS height I am saying it needs more than just Bilstein Hd's and H&R reds changed to achieve it.
#30
Rennlist Member
Just for comparison here is my car set at min height. It is not close to RS height. IMO they look the same. Here is my confusion.
Last edited by cobalt; 09-09-2008 at 12:47 PM.