auto/S197+ boost, beware...
05-01-2010, 09:02 PM
#22
6th Gear Member
Thread Starter
Join Date: Jan 2008
Location: North Pole
Posts: 6,716
05-02-2010, 02:48 AM
#24
6th Gear Member
Thread Starter
Join Date: Jan 2008
Location: North Pole
Posts: 6,716
thanks for the support.
which thread? I'd be interested in reading. My tranny is fine.. it's the motor that took a crap.
I understand how things are supposed to be relatively safe with the autos/boost and at the track, but those are still bursts of speed from 0-110+. In the real world, were speed fluctuates and it's not always from those numbers, anything can and will happen. I am still going back to 3.31s mmmmaaaayybe 3.73s, I am still suffering from blown motor hangover.
It sucks my motor blew due to something like this, but at least I'll know what NOT to do in the future...
05-02-2010, 06:08 AM
#25
4th Gear Member
Join Date: May 2007
Location: Pacific Northwest, USA
Posts: 1,691
Sorry to hear about your motor. Are you thinking about puting on the new frpp instake? Wanted to say though seriously consider the 3.73's. The drop to 3.31 from 4.11 is pretty steep and the 3.73's have been alot of fun for me. Ive only been to 110 but she still feels like she's pulling pretty good when I let off at that speed.
05-02-2010, 10:30 AM
#26
6th Gear Member
Join Date: Nov 2007
Location: Montaner
Posts: 6,193
So let me get this straight.
We have a stock motor that blew up @ 400whp with a vortech non IC and a brenspeed tune?
Was this an e-mail tune or a dyno tune? And is it normal for you auto guys to run your cars with OD off like that? I've never read of anyone doing that before.
We have a stock motor that blew up @ 400whp with a vortech non IC and a brenspeed tune?
Was this an e-mail tune or a dyno tune? And is it normal for you auto guys to run your cars with OD off like that? I've never read of anyone doing that before.
05-02-2010, 12:39 PM
#28
5th Gear Member
Join Date: Sep 2006
Posts: 3,401
It was always my understanding that going FI with the stock Auto tranny was risky for a number of reasons. I never had the reason to look into it (I'm a 3 pedal man) but wasn't one of the reasons something to do with the way the tranny dumps the vacuum to momentarily reduce motor power during shifting? I wonder if the change in motor momentum during that shift at 6k, into a tall gear, was a stretch too far.
Of course, full boost in top gear (OD) is usually a no-no anyway, the forces in play on the rotating assembly are incredible in that scenario. I never WOT in 5th - ever.
Auto tunes are definately different to manual tunes on the same motor, I know that a lot of the smaller tuners are not very good at them. Lidio is famous for producing one of the most reliable auto tunes out there.
Of course, full boost in top gear (OD) is usually a no-no anyway, the forces in play on the rotating assembly are incredible in that scenario. I never WOT in 5th - ever.
Auto tunes are definately different to manual tunes on the same motor, I know that a lot of the smaller tuners are not very good at them. Lidio is famous for producing one of the most reliable auto tunes out there.
Last edited by marcuskeeler; 05-02-2010 at 12:42 PM.
05-02-2010, 01:02 PM
#29
6th Gear Member
Thread Starter
Join Date: Jan 2008
Location: North Pole
Posts: 6,716
Sorry to hear about your motor. Are you thinking about puting on the new frpp instake? Wanted to say though seriously consider the 3.73's. The drop to 3.31 from 4.11 is pretty steep and the 3.73's have been alot of fun for me. Ive only been to 110 but she still feels like she's pulling pretty good when I let off at that speed.
I'll put it back on eventually, only when I get a air to air intercooler and dual bypass valves per paxtons directions. 110 might feel like it's pulling, even with the 4.10s, but trust me. It really does drop off rapidly after that, even with boost. The only way to get it to pull harder in the final gear was to shut off the OD and force the gear into the redzone ( you can see where that got me, so please don't do it lol)
So let me get this straight.
We have a stock motor that blew up @ 400whp with a vortech non IC and a brenspeed tune?
Was this an e-mail tune or a dyno tune? And is it normal for you auto guys to run your cars with OD off like that? I've never read of anyone doing that before.
We have a stock motor that blew up @ 400whp with a vortech non IC and a brenspeed tune?
Was this an e-mail tune or a dyno tune? And is it normal for you auto guys to run your cars with OD off like that? I've never read of anyone doing that before.
It was always my understanding that going FI with the stock Auto tranny was risky for a number of reasons. I never had the reason to look into it (I'm a 3 pedal man) but wasn't one of the reasons something to do with the way the tranny dumps the vacuum to momentarily reduce motor power during shifting? I wonder if the change in motor momentum during that shift at 6k, into a tall gear, was a stretch too far.
Of course, full boost in top gear (OD) is usually a no-no anyway, the forces in play on the rotating assembly are incredible in that scenario. I never WOT in 5th - ever.
Of course, full boost in top gear (OD) is usually a no-no anyway, the forces in play on the rotating assembly are incredible in that scenario. I never WOT in 5th - ever.
05-02-2010, 01:14 PM
#30
5th Gear Member
Join Date: Feb 2007
Location: Hawaii
Posts: 2,211
And I'm NOT blaming the tuner either.
As mentioned earlier, the tranny has some weird effects on the PCM when shifting. Not to mention the tranny has to build line pressure almost immediately when you have O/D locked out and then let it shift.
You might have also bounced off the REV Limiter ontop of being at full boost and trying to shift. Way too many variables at work here. You should check with Brenspeed and make sure they know what happened. There might be some variable they could adjust at WOT for autos.
Besides, maybe they could give a few a hundred off that B302 block
