John Kuhn the turbo guy worked with http://www.splitsec.com/spike/Porsch...e928turbo.html to get one of there MAF adapters working with the 928 brains, but its not a cheap option, and benefits I think only show up when the rest of the air path is opened up. Kind of a toss up, keep the original Ljet using a MAF and adapter, or rewire and sharktune with LHjet and MAF.

We are talking incremental changes, not big steps, so nothing wrong with leaving the barndoor air flow meter on a mild motor. Its budget and personal preference.

 

By GregBRRD

Have to agree, I deleted my post when I found out the budget as it doesn't apply to your project. I do have hot cams and euro heads that I can sell. With a 5.0 litre engine I would use the 49 mm intake and light porting by an expert.

Greg

 

total noob question, can you make a 5.0 16v?n I also sat down with the wife and worked out a budget. She says i can spend more on it, but it will be over a longer period of time. my ultimate goal is to not go crazy but add some needed peep to this SOB. (semi old bugger) its starting to sound like a good high quality rebuild on a 4.7 euro might be the way to go. make some good dependable power.

 

A hybrid is just that. A 5.0L w/ 16v heads. You will need to fly cut the piston's. Look at Marks post earlier in this thread and do a hybrid search and you will find all the info needed.

That said it will be cheaper to freshen up your block, bearings,rings,gaskets do some work to your heads, larger valves and you will have a strong motor w/ the proper exhaust!

 

Lots of info on that! thanks guys, this has given me lots to think about. There are plenty of options out there. thats for sure.

 

Why not just buy a used supercharger kit from someone for the engine that you have in the car right now?

 

if i found a good deal sure. but, one thing i need to fix is i messed up the hole that the engine lift bracket goes in to the head on the passide, and it is fixed with JB weld. so if i have to take the head off, might as well rebuild the motor (120 k)

 

How about a 4.7 liter Euro engine.

Perhaps you could find an resonable price on the euro bits and transplant them onto your 4.7?

Anything that make near 300HP is going to be a real grin to drive, in an early car.

 

BC has a 4.7 for sale. and im looking in to it, but i need to see how much a pro rebuild will be. etc be for i make the plung. but that sounds like my best option to me.

 

Can a 4.5 be bored out to a 4.7?

 

Thats a great idea Greg.

 

Then you can work on the new motor and still enjoy your running 928.

 

Yes. Most 4.5L and 4.7L blocks can be bored to 100mm but not much more.

 

You would think so :-)

 

I am still saying that a supercharger is the way to go. There are used centrifugal kits for sale every now and then.

Now, if you want to combine the supercharger project with an engine build project, then that's the time to lower the compression a bit.
- REBCO did the dishing work on my pistons for $79.70 for all eight + shipping, this is a pretty damn good price from a piston lightening specialist. They can put in bigger valve reliefs the same time for a reasonable price as well.
- I am not at all familiar with the 2-valve combustion chamber, but I ***-out-of-u-and-me that one could unshroud the valves a bit and reshape the chamber to be more compact, i.e., to minimize the surface area ^(3/2) / volume.
- Combining the lower static compression with hotter cams will bring the dynamic compression to yet a lower level.

This all amounts to a motor that you can safely boost to many smiles, at least in theory.