Re: quad-rotor 565
 

That is pretty rich, suck part is, if you don't have any safety, such as detonation spark/fuel control, then you have to run it rich to keep it further away from "the edge" :( another downside of running too rich besides economy is the carbon buildup can induce detonation after hours of use at that time and if you don't have any detonation control, catastrophic engine failure results :(

What I do is find what AFR the engine makes max power, then "detune" by ~.5 AFR, then allow detonation control to reduce timing if needed, and if detonation control exceeds 5 degrees, the ecu reduces AFR by another full AFR and will still retard timing till detonation is controlled, however if detonation is gone it will start reapplying spark and start the process over.

Re: quad-rotor 565
 

These were blower motors that I just put the quad rotors on. The motors are 598ci. Brodix 3x CNC heads, carburated,Solid roller, dry sump, running 8.25:1 comp.
I am planning on running a 93oct setup and occationally bumping the boost up for 100ll. I will however run 100ll, 90%
of the time just for insurance.

Re: quad-rotor 565
 

I'd be carful running 12# boost on 100LL at 8.25:1 ratio. 10#'s is more reasonable. 8#'s for 93 octane. I would lean it out to 12:1 A/F to start with. Are you getting carbon on the transom?

Re: quad-rotor 565
 

The whipple were just put on and the first motor dynoed yesterday, so I wouldn't know about the transom.
Do you really think that is to much boost with 32* timing.Dustin said 10# on pump gas no problem. Seems like 15# on 112 would be a biger prob. to me, or' 565 whippled" running 18# on 100ll.But I know nothing about it except what I'm told by Dustin or other engines I see running.
Can't you run more boost with the whipple than a roots blower or is that wrong.

Re: quad-rotor 565
 

I'm not saying it can't be done, just be careful, and don't exceed 10# on 93 octane. 15# on 112 race gas is a whole different ball game. Race fuel is far superior to av gas. Which intercooler do you have? Is it the whipple MOAIC?

Re: quad-rotor 565
 

Yes it is the moac. I will be feeding in directly off one stage of the three stage seawater pump with a KE sand strainer.This is all brand new stuff and completely new to me. I have always ran roots blowers in the past.

Re: quad-rotor 565
 

Not looking to start a war on here, but I sure would like to see some dyno sheets on these 1500 hp Whipple charged motors. I see Steve Morris Racing advertising some big number Procharged 572's, but I've never seen any of the Whipple stuff.

Re: quad-rotor 565
 

With that cooler you can run 10# easy, 11# should be OK. I have the older one.

Usually you can run more boost than a roots blower. Roots aren't quite as efficient.

Re: quad-rotor 565
 

Just got another dyno update, we have not hed all the pullies needed. Today they got 1340hp with race fuel, I don't know how much boost. They are stil running 32* timing and A/F is stil 11.4. They want to lean it out but it is breaking the dyno. Torque won't allow them to pull much below 6000rpms. They feel like it would make over 1400 with 36-38* of timing and better A/R numbers.
GPM. I know what you are saying, these are from a very conservative shop and engine builder.Teague built some 565ci carb motors with AFR heads that make 1435hp. and Sterling make some 557ci EFI with Big Cheif heads that make 1530 hp and had a little more if they wanted to lean on them.

Re: quad-rotor 565
 

Breaking the dyno. LOL
My engine builder said the same thing. Thats why we never pushed past 1370HP
I adjust my afr in the boat via the EFI computer. This is one of the big advantages for EFI

I'm running 34*, 12.5 afr, 15# boost, 112 octane.

Sounds like it's time to test you engine in the boat.