OK This is a thread that I hope will be used in a constructive way. I am going to offer up information here that some may or may not agree with Just understand that this information is coming from a company/man that has been doing it for 55+ years and is very respected by me and others in this industry.

Now to the nitty gritty:

These are the questions that I asked in the "other" post, now we will look at why they were asked.

1) What are you using for an air box, filter?

Getting the air into the supercharger is very, very important, what some people do not understand is that a turbo or centrifugal supercharger compress the air BEFORE the TB so you are able to "stuff" more air into it. Is this better? No……. for reasons we will get into later.

2) Have you considered a larger MAF and TB? i.e FAST has a new 110mm TB.

Asked for the same reason as the above question. You need to look into a larger TB and MAF period; these items WILL NOT keep up with the supercharger. John Lingenfelter proved this on the 427 supercharged projects we worked on with him in our shop.


3) I think there may be some tuning issues here that we are missing.

Obviously there are some issues with tuning, I think that this project would benefit from a GOOD 4 wheel dyno tune and some track tuning, ONCE IT IS SET UP CORRECTLY.

4) I will get back to you on the 220/224 114LSA w/ .600" lift cam, I think this may be a problem.

You are blowing the boost right out of the tail pipe here, I suspected this but I was not sure. I admit I do not speak CAM. Some may argue with me here, but I trust the knowledge of Jerry Magnuson, he has done more with superchargers that just about anyone in the industry.


Lets all use this to learn and not to bash. I hope this will help Chris and others who are looking to step up the performance of their Radix powered truck. IT CAN AND WILL BE DONE. The MP112 is more than able of making 600 HP if done correctly.

 

Ok, here are some answers;

1.) We are using the cold air kit supplied with the charger.
2.) We are using a ported stock TB and a SLP MAF
3.) The truck was tuned on a all wheel drive dyno, I can asure you the tuning is not the problem. Prior to being tuned on the all wheel drive dyno the tuning was a issue. It was way off!! Now the tune is spot on.

Now on a 408 inch motor I would and did expect a lot more power out of this combo. I am not bashing Magnacharger in anyway, I do think that this is not the right blower for the motor though. We have made good power from their blowers on stock cube engines but, on this big motor it just isn't getting the job done.

I am open for any advice, we are willing to try just about anything to get more power. The truck feels really good and has great response, just no top end power. feels like it goes flat. In first gear the truck is a absolute monster. Spin's all 4 tires with 22's. Even has gone a best of a 1.7 60'.

Thanks

 

What part of this cam is blowing the boost out the tail pipe? exhaust duration?

 

Yes

 

Just curious, Brian, who has done this?

 

Chris I never thought you were bashing Magna! I just want to help you with this, I know this combo will work.

I dont thing the ported TB is going to help here, you are really pulling some MAJOR air. I am not too familiar with the SLP MAF so I cant comment on this. You need to check and see if there is ANY sign of vacume in the intake tube. If there is, they you have just found the restriction. 3 inches of vacume would equate to approx 60 hp give or take a few. Chris, as much and I hate to say it....That cam is TOO BIG .

 

Please help me see this: Why is 220/224 114lsa blowing boost out the exhaust? I thought that was a good supercharge split?? If not, what would be a good SC split?


Hell, I don't even have an sc, but I am interested in learning

 

Again, I am not fluent in CAM I too am learning when it comes to cams. I asked the owner of the company about his set up and he just about went through the roof when he saw the cam specs. We have had ALOT of good luck with the LPE GT2 cam. Not quite as aggressive as the cam in the APE set up. At this point we are going into uncharted water, I think that if we learn this together it could prove positive for all.

 

LPE GT2-3 specs:

Camshaft specifications: 207/220 duration @ .050 .573/.580 with 1.7 ratio rocker arms 118.5 CL

 

Blownchevy What was the best #'s that LPE REALLY got out of their 427 and a magnacharger to the wheels?