Build Up Of My Sleeper
#22
and a pillar mounted boost gauge would save me if that happened? Or a boost gauge at all?
My understanding of the way I programmed haltech...once the MAP Sensor sees 0.0Xpsi over what the fuel cut is set to, it cuts fuel. scares the **** out of me too. (wonder what would be safer at high rpm/boost situation, fuel or ignition cut?)
yes, I've tested it and now know my boost gauge is about a half of a pound off.
Worst case...it pops off WOT ~7.5k rpms...will my ECU cut fuel fast enough??? I don't know. But I don't think it would wait until I hit 40psi. With all the restriction in my air flow (SMIC and a MAIN CAT), I don't think my turbo would hit 40psi too quickly.
SCENE: I'm hauling ***, engine is screaming up to 9k and all of a sudden I hear and feel the wastegate SLAM SHUT!!! Let's say the ECU cuts fuel at 29.4psi. That would be almost a 15psi spike, assuming my fuel cut is at 16psi and I tuned for 14psi...that's pretty slow reaction from electrons. IF that did happen my map has fuel up 2 bars above atmosphere...of course it's not tuned up there, but the fuel does expotentially increase after 14psi. would my 1600cc injectors be maxed out...I hope so.
I have personally seen rotors that came out of a HBP motor with the same apex seals I used. One face on each rotor had DENTS in it from detonation, the seals were fine. (I'll see if I can get pics of those rotors...Rick Engman was pretty impressed/amazed. For someone who has been in rotary racing as long as he has, some of us 7 guys around ATL have shown him some things he's never seen, haha! Destruction wise that is)
I also don't see how a boost gauge would save me either???
I didn't type this so I could read it again so please elaborate on what I'm missing.
TIA
My understanding of the way I programmed haltech...once the MAP Sensor sees 0.0Xpsi over what the fuel cut is set to, it cuts fuel. scares the **** out of me too. (wonder what would be safer at high rpm/boost situation, fuel or ignition cut?)
yes, I've tested it and now know my boost gauge is about a half of a pound off.
Worst case...it pops off WOT ~7.5k rpms...will my ECU cut fuel fast enough??? I don't know. But I don't think it would wait until I hit 40psi. With all the restriction in my air flow (SMIC and a MAIN CAT), I don't think my turbo would hit 40psi too quickly.
SCENE: I'm hauling ***, engine is screaming up to 9k and all of a sudden I hear and feel the wastegate SLAM SHUT!!! Let's say the ECU cuts fuel at 29.4psi. That would be almost a 15psi spike, assuming my fuel cut is at 16psi and I tuned for 14psi...that's pretty slow reaction from electrons. IF that did happen my map has fuel up 2 bars above atmosphere...of course it's not tuned up there, but the fuel does expotentially increase after 14psi. would my 1600cc injectors be maxed out...I hope so.
I have personally seen rotors that came out of a HBP motor with the same apex seals I used. One face on each rotor had DENTS in it from detonation, the seals were fine. (I'll see if I can get pics of those rotors...Rick Engman was pretty impressed/amazed. For someone who has been in rotary racing as long as he has, some of us 7 guys around ATL have shown him some things he's never seen, haha! Destruction wise that is)
I also don't see how a boost gauge would save me either???
I didn't type this so I could read it again so please elaborate on what I'm missing.
TIA
#24
the boost guage will let YOU see when youre overboosting so YOU can get out of the throttle. its just an extra precaution. great car though, i figured the boost guage location was bc you wanted a sleeper, then i thought well why didnt he jsut replace the stock one with and after market. so, why didnt you do it that way?
#27
Originally Posted by modrx7' date='Dec 20 2004, 07:31 PM
You can order it from Digkey, if you are interested PM me and I'll give you the part numbers for the plug/receptacle, backshells, and pins/sockets.
#28
Originally Posted by Shane.Trammell' date='Dec 21 2004, 01:07 PM
later JDM models...I thought about that for a second, then thought oil pressure was pretty crucial on a motor I put together, haha!