Zippy nailed it on the head, you are over loading the intercooler....they send out a unit designed for a stock 4.8L and 5.3L running 6psi...not for a 370 with 10-12psi...I would bet thats your problem....the intercooler cant keep up with the boost and heat levels

 

I know people have put bigger heat exchangers, but has anyone gone to a larger reservoir? Or is methanol pretty much the only option?

 

I went with both a larger heat exchanger and a larger Vortec reservoir.Both helped some.

 

Agreed, but Maggie says they did their homework and the system is more than adequate for higher boost larger displacement apps. I had long chats with these guys before going with the 370 and they actually suggested a 383-402 wud be a great idea. There is some question about compression tho...now they say 9.4 might be a bit lo, but when I started the build I was told 9 was what they wanted. We'll play around with that, the cam and pulley up and down to find the right combination. Its gonna take a while but I'll pin it down.
Maggie was shipped with a 3.0 pulley.
Bypass is workin like it shud.

 

IAT's were @ 170* @ 7psi before meth guys. Also as I stated, Maggie says the thing is DESIGNED to spin at much higher RPM and shud really wake the motor up at higher boost levels (11-12psi). If the I/C cudn't handle higher boost on a mere 370, then thats a design issue and nothing to do with my motor. I guess it all comes down to how they tested - real world or otherwise...

 

I'm not ready to spend cash on something that might help a "bit". I'm gonna work with Brian and see what Maggie is gonna do. If the I/C or heat exchanger isn't a realistic size/capacity then all our R&D is worth something and we'll work it out together.
I'M WAITIN ON GRIPPY TO PUT HIS MUSEUM PIECE ON THE ROAD SO WE CAN COMPARE!

 

Have you confirmed your TB is opening 100%? no expanation for IAT's I guess, and you'd be limited on boost, just curious

 

Have you tried just simply replacing the IAT sensor to be sure its not the problem?

 

I'll start with a 3.2 or 3.0 pulley

 

Nope...but I do have that little doo-hickey of DrX's...but as I changed the whole unit over to WCCH's when I put the 122 on as Richards was so much cleaner inside and out. I never switched the controller back out so it wud work...but it sure won't be worth all the ponies I want. R/