My GT2 vs Peter's 3.8L monster
#46
08-30-2010, 07:19 AM
Join Date: Jun 2005
Location: Virginia, USA
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Rep Power: 788 
I'm actually running a Protomotive setup with a TPC motor build (Pauter rods and the newest Porsche lifters).
My turbos, however, happen to be the same ones that Markski now sells in his outstanding 850 setups.
My turbos, however, happen to be the same ones that Markski now sells in his outstanding 850 setups.
#47
08-30-2010, 07:23 AM
Join Date: Jun 2005
Location: Virginia, USA
Posts: 8,510
Rep Power: 788 There are stock cars running larger turbos than mine (and making more power) on stock heads studs at 1.9 BAR without issues. My head studs, while stock, have been overtorqued beyond factory spec.
Considering all of that; I'm honestly not worried about running 1.8 BAR at all.
#49
08-30-2010, 07:40 AM
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Join Date: Aug 2009
Location: Houston Tx
Age: 39
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Rep Power: 186 Different tuners have different thoguhts on this: EVOMS and BBi obviously prefer large head studs. Switzer and TPC don't believe in them at all. Protomotive does builds with both, based on what the customer wants.
There are stock cars running larger turbos than mine (and making more power) on stock heads studs at 1.9 BAR without issues. My head studs, while stock, have been overtorqued beyond factory spec.
Considering all of that; I'm honestly not worried about running 1.8 BAR at all.
There are stock cars running larger turbos than mine (and making more power) on stock heads studs at 1.9 BAR without issues. My head studs, while stock, have been overtorqued beyond factory spec.
Considering all of that; I'm honestly not worried about running 1.8 BAR at all.
#50
08-30-2010, 07:42 AM
Join Date: Jun 2005
Location: Virginia, USA
Posts: 8,510
Rep Power: 788 Yes they were.
#51
08-30-2010, 07:50 AM
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use an engine dyno or just bolt in car heat cycle and then drop back out?
#52
08-30-2010, 08:35 AM
Join Date: Jun 2005
Location: Virginia, USA
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Unfortunately, they had to do it the hard way. No engine dyno.
Last edited by Divexxtreme; 08-30-2010 at 08:42 AM.
#53
08-30-2010, 08:39 AM
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how long how many cycles before it was retorqued n did they find any studs/nuts that were not at full torque?
#54
08-30-2010, 08:44 AM
Join Date: Jun 2005
Location: Virginia, USA
Posts: 8,510
Rep Power: 788 As far as I know, no nuts were not at full torque. I'll have to check to see how many cycles it was done for. Mike builds race motors that win the 24 hours of Daytona (literally), so whatever methods he used, I'm comfortable with.
#56
08-30-2010, 09:24 AM
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posted by scott
3.6 with headwork and cams. Made 830rwhp at 1.4 BAR, ran 4.90 60-130 and trapped 148.
I then went to 35s and made 889rwhp at 1.6 BAR, and ran a 4.67 60-130. Never got a chance to go to the track with the 35s.
3.6 with headwork and cams. Made 830rwhp at 1.4 BAR, ran 4.90 60-130 and trapped 148.
I then went to 35s and made 889rwhp at 1.6 BAR, and ran a 4.67 60-130. Never got a chance to go to the track with the 35s.
#57
08-30-2010, 09:37 AM
Different tuners have different thoguhts on this: EVOMS and BBi obviously prefer large head studs. Switzer and TPC don't believe in them at all. Protomotive does builds with both, based on what the customer wants.
There are stock cars running larger turbos than mine (and making more power) on stock heads studs at 1.9 BAR without issues. My head studs, while stock, have been overtorqued beyond factory spec.
Considering all of that; I'm honestly not worried about running 1.8 BAR at all.
There are stock cars running larger turbos than mine (and making more power) on stock heads studs at 1.9 BAR without issues. My head studs, while stock, have been overtorqued beyond factory spec.
Considering all of that; I'm honestly not worried about running 1.8 BAR at all.
#58
08-30-2010, 09:56 AM
Registered User
That was Scott's 996TT I think he may have been referring to the GT2 which ran a 5.49
#59
08-30-2010, 10:39 AM
Join Date: Jun 2005
Location: Virginia, USA
Posts: 8,510
Rep Power: 788 Shotcaller - The previous 5.49 in the GT2 and was at 1.7'ish BAR on a 50/50 mix of C16 and 104 octane.
Tonight, I'll run at 1.6 BAR on straight 100.
#60
08-30-2010, 10:40 AM
Join Date: Jun 2005
Location: Virginia, USA
Posts: 8,510
Rep Power: 788 I have in the past made 30.1 psi or so roughly 2.0bar of boost with my motor. This was done 2 or 3 times on pulls to test to see the car was doing (mainly seeing how much I needed to adjust the controller for the weather). I was never able to make any kind of successful passes on ANYTHING high because of traction issues. I know the 997TT's have ran over 2.1bar from what I've been told.