Holley 5 bar Map with 0411 ECM

[grendel]

Anyone know if it can be used reliably? Voltage range seems to be a little less. .5 to 4.5V vs the .0v to 5v of the GM 3 bar unit.

I am looking for a screw in MAP for my Whipple.

Should note that this will be a SD tune. No MAF to fit the Dominator throttle body.

[blownbluez06]

Not sure why you would want to do it, but you could make it happen if you wanted. Your boost wouldn't read properly, but you could write a PID to show actual boost. You're not really going to try to run over 30psi boost are you?

[grendel]

Not sure why you would want to do it, but you could make it happen if you wanted. Your boost wouldn't read properly, but you could write a PID to show actual boost. You're not really going to try to run over 30psi boost are you?

Oh, maybe . It's a 427 LSX with 6 bolt heads

It's not really the 5 BAR that I am looking for, but the screw in capability, so I can clean up the blower intake.

Know of a 3bar screw in MAP with a 5v reference signal? Can't find one that is plug and play.

[DSteck]

I make plug and play MAP sensors for the AC Delco plug, but it isn't screw-in type. You'd have to clamp it down.

[DrLoch]

Our look for an absolute pressure transducer.

[ElecTech]

AEM has several screw in transducers. They have a 2 bar and a 3.5 bar that you can buy most anywhere. Ballenger Motorsports is one.

[grendel]

I make plug and play MAP sensors for the AC Delco plug, but it isn't screw-in type. You'd have to clamp it down.

Sorry, that wouldn't work. I have a plate on the blower I can drill and tap.

[grendel]

AEM has several screw in transducers. They have a 2 bar and a 3.5 bar that you can buy most anywhere. Ballenger Motorsports is one.

Those are .5v to 4.5V I thought?

[ElecTech]

Those are .5v to 4.5V I thought?

So are the GM sensors

[grendel]

So are the GM sensors

Thanks for that, I've read they max out at 5v, not 4.5v.

Then the one I have will work.

I could also go with one of the AEM's I found on Summit.

[ElecTech]

Thanks for that, I've read they max out at 5v, not 4.5v.

Then the one I have will work.

I could also go with one of the AEM's I found on Summit.

0.5-4.5 V is the linear range where the AEM sensor is the most accurate, but it is still a 0-5V device.

[blownbluez06]

Which LSX block do you have, 1st or 2nd generation? I had the first gen and blew the cylinder out where the water jacket is exposed the first time I hit 30psi. GM was kind enough to take care of the replacement block portion of the new build and I found it interesting how they reinforced the water jackets on all the cylinders. Since I posted up about my dilemma, others have let me know they experienced the same issue.
If you have the 1st generation, keep that in mind. The warranty process is not easy and they told my engine guy that they're pretty much done warrantying any 1st gen blocks.

[grendel]

Which LSX block do you have, 1st or 2nd generation? I had the first gen and blew the cylinder out where the water jacket is exposed the first time I hit 30psi. GM was kind enough to take care of the replacement block portion of the new build and I found it interesting how they reinforced the water jackets on all the cylinders. Since I posted up about my dilemma, others have let me know they experienced the same issue.
If you have the 1st generation, keep that in mind. The warranty process is not easy and they told my engine guy that they're pretty much done warrantying any 1st gen blocks.

Thanks for the concern. I have a block that's been tested for wall thickness, etc. It's a late model block (reinforced, etc) that has been built for boost, thus the 427 CI over something bigger.

[blownbluez06]

Mine had no core shift either. Plenty of wall thickness.

I'm glad to hear you have the later model reinforced block. I expect it'll hold up to anything you can throw at it.

[grendel]

Looks like you had some detonation?

[blownbluez06]

Looks like you had some detonation?

Looks? Not much to look at and the pistons are in good shape. I won't deny the detonation since I was surprised at the 30psi I yielded on that pass, but that's the last thing I would expect to happen with detonation. I would expect the rods to come out the side of the block before this happened. GM knows it's an issue or they wouldn't have changed the design. The head gaskets were in good shape too.