WOW!! I think I've missed a good one. I'm gonna say you should put some other heads on it to raise CR up a bit. You guys should have a boat load of them sitting around.

Keep in mind this thing is only rated at 14k rpm, but has been known to safely spin 18k. It's important to keep that in mind when selecting a cam so it doesn't peak to high.

 

Unless the cam has tons of overlap that we are not seeing I don't think that it would be whats killing top end here. Split cams are not really bad.

Purevl's Z28:
D1 11psi
huge cam 230/234 .598/.602 114
6800rpm 630hp 550 tq

I could understand the MAF and TB being somewhat of a restriction but is it really nessecary to change them to these huge 110mm units just to make the Radix work? The D1 or F1 guys don't have to do they?

Do blowers work somewhat similar to turbo's in that they will only work on a certain amount of cubes before they just can't supply enough air sufficiently?

I know on Mustang's back in the day you could have a car with an A-Trim Vortech at 8psi, then swap to an S-Trim at 8psi and see a huge power gain just because of the temp and CFM diff.

Don't get me wrong. I'd love to see it be something simple and prove that the Radix can support big power like that without resorting to extreme measures just to porve the point. IE like trying to make an STS kit make 1000rwhp on a 6.0L when you can accomplish the goal MUCH easier with a front mount.

 

F8L, think of the blowers as an air pump. That pump can only pump so much air at a given RPM. If the motor starts using more air than the pump can pump, there's going to be a problem.

I would assume that the turbos run on the same principle.

 

ok.. i'll admit, im totally new and uneducated at this...

but when our jet engines arent running enough "boost" which is THRUST in our books, it means they arent getting enough fuel or air... which it seems this motor is getting PLENTY of air....

are the injectors the correct size to support a motor and air induction of that size?.... i know when my boost pump wasnt hooked up, it was falling flat on its face...

maybe its something as simple as not a big enough fuel pump or somethin....?

my 2 cents.

 

[quote]IE like trying to make an STS kit make 1000rwhp on a 6.0L when you can accomplish the goal MUCH easier with a front mount. [\quote]

Just what are you trying to say buddy?

 

Radix has a max rpm of 14K? Well nevermind what I said, geez I didn't think it was that low. I'm sure they can spin higher, but the efficiency would go out the window. F8L touched on that with his Rustang analogy.

Fuel could be an issue, but like the others said: Slap some different heads on there, raise the CR and call us in the morning.

 

Vanilla, the RADIX is advertised up to 14k, but that doesn't mean it still doesn't shine higher.

 

kind of jumping in late, but have you been logging the the intake temps and pressures as the truck pulls through second and third gear. when I changed the pulley down to 2.75" dia. pulley the power was great but hitting third and around a 100mph. the motor would flatten out. I'm stillworking this out on my truck, but something is pulling the timing. I haven't driven the truck enough lately to get a complete logs up top. I'm thinking the intercooler is too small at high flow levels. if the MP112 is too small call eaton an get the MP124.

 

Is that out yet?

 

hmmm