Redtop MAF limits

[Zeph331]

Hey guys i have a Redtop w/ GT2560R running at 10 pound
The problem i have is whenever i hit WOT it seem like Boost Cutting it hard
But whenever i half throttle ease it into 7 or 10 pound its ok.
Revs fine up to 8000 just not under WOT under boost

So far i have checked Boost leak, cleaned Maf, Checked TPS, Spark plug gapped to .28, changed fuel filter, walbro pump, Changed O2, changed CTS


so im just wondering if im MAXing my MAF under WOT?

[ultimateirving]

Suction pipe collapsing can cause similar issue.

[Zeph331]

mm ok ill double check that again. Under Wot sometimes the throttle body sounds like it was choking

[cotbu]

Log the mafs voltage if you believe that to be the cause. When I was gt28r, I maxed the stock red top mafs at 14psi, but it's not really boost related, it's more air flow related. That's why easing into boost helps. might be time for an upgrade.

Sent from my Highly Tuned Note 4.5!

[Zeph331]

hmm ok i did some voltage check
im getting .79v with ignition On mode

FSM says .2v approx.

what ya guys think?

[Zeph331]

with Idling its is at 1.57v
Seems like MAF is fine

Edit: Do you guys think it would timing off problem?

[Croustibat]

You wont get that from a maxed maf, unless of course you did not remap and really are hitting the TPmax cut.

What you describe is a typical pump failure => test fuel pressure.

Now about that maxed maf ... when someone tells you to check MAF voltage, he is telling you to measure the voltage at WOT, not at idle ...

[Kingtal0n]

in for pictures of burnt up piston rings

[Zeph331]

no i did not get a remap yet, ok ill check the fuel pressure

[Zeph331]

nevermind might have found a cure