Porsche 928 engine
2020 ж. 13 Жел.
5 069 Рет қаралды
An engine build for a 1978 928.
1986 5L bottom end with valve reliefs added.
1978 top end.
Powder coated with silver artery/silver vein.
hardware is either new 304SS or replated factory hardware done in yellow zinc plating.
the intake clamps are NLA for purchase. They are the factory units replated.
Work of Art and Expertise
Thank you very much.
Beautiful! Nicely done.
Nice and smooth!
pure beauty.. looks really nice. Well done sir
Hmm. This engine does not have the leaves and acorns in it that Noah’s 1978 had. :-) Very nice to see how it SHOULD look and sound.
pohhhh That looks absoluty great Colin. Nice work. I'm still battling coolant leaks on my engine ;-)
Thank you. Thankfully these are not difficult engines to correct coolant leaks on.
Interesting.
Very nice 👌
Thank you.
Nice details on a ticking bomb 💣 design
It is not a ticking time bomb engine. Unless you're doing really stupid things to it.....
Wish I could get my 79 running like this
You can! Its only parts and $$$ 🤣🤣
@@cjensan how about some Kjet tuning tips, searching for vacuum leaks and setting timing?
On the 16V cars its always needed to replace the rubber boots that connect the runners to the plenum as well as the throttle body to the plenum. Past that you can pressurize the intake system to 3-5 psi and then spray around the intake and hoses with soapy water. Any leaks will produce lots of bubbles. Setting the timing should be done with the vacuum taken off the distributor and the engine brought to 3k rpm. You should then have roughly 31 deg advance is what they respond to the best
@@cjensan you have so much useful information! The comments are a gold mine
Totally Pro !! The only rational way to work on a 928 engine...is on a STAND !!! Is there a tilt forward full front clip for these??
There is not a tilt forward clip for these cars.
1:10. I like it!
You’re like my new best friend! Lol. I’ve always wondered if 16v heads would fit 5.0 block. Did you use the pistons that came with the 5.0, or did you get new ones to cut in the valve relief? What compression ratio would this conversion have on ‘79 Euro (non - “S”) heads? Could you also stroke the ‘85/‘86 5.0 without sleeves? If so, out to how many liters?
The pistons had valve reliefs cut into the pistons. The result is roughly 11:1 CR. The euro heads may be a little higher CR. You can add a stroker crank and that would take you out to roughly 6L. You will absolutely want to have custom connecting rods made with the factory offsets to the rods made to minimize side loading of the pistons.
Drooool
hey i have a 78 as well. what exactly do i need to do to the pistons/short block on the 5.0L to do this set up? thanks
You need a 1985/6 5L short block. You then need to flycut the pistons a little for valve reliefs. It must be the 85/86 as the S4 woild result in much lower CR and does not have the standoffs for holding the intake manifold. If you are wanting to do this you should consider either doing wet sleeves or nikasiling the block and running custom light pistons, as well to give you a better setup.
Real nice! I have a 4.5l 1980 (euro - non s) and would like to do something similar.. is the 4.5l top end stock and what would the estimated hp be?
Thank you. The 4.5L top end is stock yes. Power estimated to be 300+.
@@cjensan Thanks for replying, it provides some great information and ideas. I maybe able to get a s4 block and pistons. Cheers
You need a 1985/86 S3 block with pistons.
@@cjensan Thanks, I was hoping I might be able to bolt the heads to an s4 block.
You can put them on an S4. But you will get lower CR, and the S4 block doesnt have the 2 stands in the middle of the V to hold the intake setup. The 85/86 results in better CR for power.
Looking everywhere for details on this family of engines. Not much out there I can find.. like were they cross plane or flat plane cranks?
They are cross plane not flat plane.
Hey how do I pressurize the intake manifold on my 16v to check for leaks. What tools do I need to pressurize the intake and where do I do it. Thanks
There are many ways to do it. On a CIS car I would put in air on the hose that feeds the brake booster. You will need to make sure your throttle blade is fully closed and you will need to ensure that the idle bleed screw is close so you see you least losses possible. From there you will need to use soapy water to check for leaks
Hi i get 80-90psi compression on all cylinders. Timing is bang on, what could be the cause?
What year and engine do you have? Have you tested the gauge on another vehicle? I would recommend doing a leakdown test to see where your losses may be.
@@cjensan its the 4.7s from 1983
Where are you located? I heard the 83-85 euro twin distributor is the one to get. Can we build one out to make a lot more power? Thanks
I am located outside of 100 mile house in BC canada. The 85/86 dual dizzy euro engines are fun engines for sure. You can use that top end on a 85/86 us bottom end with fly cutting the pistons to have a good setup with nice power.
What kind of fuel injectors are those?
CIS or K-jet
How much did you charge to build ?
It greatly depends on how you choose to do it. It also requires a good base engine to use for the build.
what paint is that?
This is not paint. This is powder coating. MUCH more durable.