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YOUR RESEARCHI’m coming back! 3.4L to 3.8L and more
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Install yet
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Read evidence and context
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Performed · outcome unconfirmed
And I have a 3rd radiator kit I haven’t installed yet
Leading evidence: 'Install yet' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Install yet' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Suggestion
The car def needs a tune as it runs a little rough, I think the stock computer can only do so much to compensate for all the major changes we did to the motor.
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Suggestion
Such as all the wiring and ecu To run the dfi motor
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Suggestion
The car def needs a tune as it runs a little rough, I think the stock computer can only do so much to compensate for all the major changes we did to the motor.
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20 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Planet-9: 1 discussions
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Generation: 20261026T205155Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
It’s been a long time since I’ve been on the forums. I got into tracking my car a few years ago and started sliding down a slippery slope of beating this car up, anddd then the motor blew up on track!
That basically put me out of the
Porsche
scene for the last two years. But after sourcing all the parts and doing all the machining work, the car is going to be ready for startup by possibly this weekend.
This won’t be just an average 3.8 swap, I really pulled out all the stops on this one including going high compression, porting the head and doing a valve job, all forged parts offered down to a oil pump hex key, special coatings, etc. Hopefully we will see what this motor is really capable of.
if you guys would like to see everything in detail and follow along with the build, this is the YouTube video I made for it! You can also see what happened inside the car when it let go on one of the other videos.
Wish me luck!
3.4 to 3.8L Build Video
It’ll be good to be back!
Ahha-yes.. I remember that motor pop video… 3.8’s are pretty cool in the 987… good luck! Any idea on full cost would be good info since many will experience this eventually 😩
what was the cause of the blown 3.4? Cooked
Cylinder walls from the garbage coolant system? Bore chunked?
I’ll make that video soon once I get the car back! It was a spun rod bearing, luckily it wasn’t major where it destroyed the crank, that would add another 2-4k to the bill or possibly have to replace parts of the block!
you are correct! I had my stock 3.4L bored out. I think swapping in a 991 3.8 would require a lot more than just building a motor. Such as all the wiring and ecu To run the dfi motor
Oo ya, def! I documented what parts have got I to the motor build in the YouTube link on the original post! There’s also other videos about how the motor blew on my other videos on the channel.
https://youtube.com/@phatmanrx7
I’ll be documenting the other parts of this build such as the initial start up and getting the car Dyno tuned to see how much power it really makes
It has gone up a lot. Between the time I blew the motor and actually purchasing the connecting rods from LN engineeeing. Which were back ordered for almost a year. The price jumped from like 900 to 1200. However I did find ways to purchase things for a cheaper rate. Like if you take all the part numbers needed for the timing chain and paddles, and shopping on gaudinporsche Las Vegas, you can actually drop the price of the timing parts from 1100 to like 800!
they are back in stock now I believe.
ill make a total cost video breakdown once I finally get the car home. I spent a whole year just collecting parts and waiting for discount codes or deals from some sites.
We also fired up the car for the first time this weekend. But it’s too loud. I gotta put some mufflers on. I will be editing that video for this weekend! it is alive tho!
Yes! I already have talked with the tuner to get me on the Dyno once the motor is broken in. I will shoot for around 500 miles. The car def needs a tune as it runs a little rough, I think the stock computer can only do so much to compensate for all the major changes we did to the motor.
And I have a 3rd radiator kit I haven’t installed yet
Posted a video breaking down how much I spent rebuilding my motor. Hope this helps those who are looking for information on the cost breakdown of rebuilding your motor!
Great video… it’s a reality with these motors, especially the age they’re all getting to be now. My guess there will be a lot of these donor cars available in years to come… it’s not chump change
