Building a subframe for a V8 - Porsche 986 Boxster V8 engine swap track car build 4

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[@dougseag67]

Hi Jeff, I'm just wondering if you need to sleeve the bolt holes that go through the square tube to be compliant. Its to prevent crushing the tube when you tighten down the bolts.

[@mndlessdrwer]

This is a very good point, and often overlooked.

[@jonathanperry3792]

Jeff dont forget on your SHS weld crush tubes on all those bolt holes and gusset all corners.Just a comment.

[@HomeBuiltByJeff]

I agree, but in this case the tubes are much heavier (read overkill) than necessary.

[@myturkishlife1777]

Very good work/talking Ratio, there are too many builds that are all talk, you have a great balance, keep up the great video work, love that front sub support too, better than the angle steel, will look factory when painted up...

[@Sharkerp38]

Loving the upside down Porsche sticker on the rattle can gold brake calipers.. The previous owner really committed to the Home Depot theme!

[@Brendan.Wheatley]

It's nice to see that you are promoting other KZbinrs! Loving the build and the prowess you are putting into this gorgeous little Alfa! Cheers mate...

[@1one3_Racing]

Jeff: "I could MIG weld these mounts in 3 minutes, orrrrr I could TIG weld them in 10 minutes but look super cool with my fancy pants TIG welder. Decision makes itself!"

[@s.hall.4187]

Thanks for the under car shot, the sub frame makes sense now

[@johnrb9397]

With all respect why are you doing all this? Just get a proper track car (with a roof) and enjoy time with your wife.

[@janeblogs324]

Looks like you forgot crushtubes man. Every cut you made with the grinder was making serious mustard dust. Put a side handle on it. Discs will last 10x longer

[@DAGGWOOD139]

Love your work Jeff, always enjoy seeing how your brain ticks while putting these projects together !

[@Mr_Spegru]

A bit late now and I'm sure it will be fine but why did you not fill in the 'missing' sections from the extended gearbox mounts with a couple of triangles?

[@thescottishhammer7570]

I was thinking the same thing, but I'm guessing it has to do with clearance underneath. He has great attention to detail, so I'm confident there's a solid reason why he did it the way he did.

[@rick_.]

Would be MUCH stronger. Adding material to to each side doesn't do all that much. It's all about having material away from axis of stress. Think of a piece of sheet metal. You can bend a piece of sheet metal with your hands even if it is a couple of feet wide.

[@rennch.]

Thanks for the plug Jeff. Yes, it’s a Subaru EZ30R flat 6 twin turbo into a 1969 911s. Good times. :)

[@HomeBuiltByJeff]

Killing it.

[@87rover49]

Hi Jeff . you need to get an adflo welding helmet system from 3m to save your lungs .

[@malcolmlane-ley2044]

Looks a treat, if it was my welding the engine would probably fall out on the second lap!

[@nunyaf-nbizness]

To late now but I learned a LONG time agot to ALWAYS use new mounts at the start of an engine swap to fabricate mounts. Old ones seldom have the shape they started out with.

[@Jonathan_Doe_]

Swings and roundabouts really, at least with the old mounts he’ll know that he’ll have clearance under the engine as new mounts wear and sag with age.. it’s just whether that’s enough clearance up top for the engine to go up 10-20mm if he does put new ones on now.

[@captaintoyota3171]

Looks good Jeff. Kinda think you outta have a connecting bracket where the front part angles down to the front-rear bars but that is prolly overkill. Still surprised how much room is in that car

[@HomeBuiltByJeff]

Still gussets etc to finish it off ;)

[@malcolmbennett3907]

@@HomeBuiltByJeff we like a nice gusset😀

[@psk5746]

Man that is HEAVY engineering mate ... hope you drill the RHS with many large lightening holes or she will be one slow Roxster

[@difacilprojects6676]

Awesome project! cannot wait to see the Boxster on the roads again! kind regards from Spain!

[@1one3_Racing]

Please, please, PLEASE before the next video remove that spoiler and paint over all the red overspray. For the love of God, won't somebody PLEASE think of the viewers!

[@HomeBuiltByJeff]

Show me another Boxster with this much character :D

[@1one3_Racing]

Oh God! Do they EXIST!

[@trapjohnson]

Nah, you have to wait till we get to the "Improving the Trashyness" MCM style goodness!

[@zenithenginering6099]

Looking at the frame that you made you will need to crush tube every hole through box section. Also all the corners and joins will need to be gusseted.

[@mndlessdrwer]

The other benefit of making a sub-frame like that is you can use it as a convenient mounting point for a reinforced skid-plate.

[@ITilBiondo]

You are a genius! Will be nice to see you do an ford duratec 3l engine swap into fiat x1/9! I hope you read it!!

[@rmcsilva]

Will crush sleeves be added to where the box section is bolted? I know it's quite thick wall, but still...

[@zenithenginering6099]

You will need to weld in crush tubes where the long studs are. Otherwise the nuts will work loose under working conditions as the hollow sections will squash and flex.

[@NeilConnor]

Those 986 transmission mounts look suspiciously like 996 engine mounts...

[@HomeBuiltByJeff]

and I happen to have a couple lying around ;)

[@JaseWilks]

I’m lost for words.. Thank you Jeff!! And thank you to everyone who’s subscribed to the channel!! Totally blown away!! Loving the progress mate, subframe looks amazing!! Over complicated was definitely worth it😎

[@HomeBuiltByJeff]

Haha, thanks mate.

[@alman6581]

Jeff. Think you will need a huge number of gussets to take the engine mount load on that angle. Great thoughts though.

[@cristianmistretta7826]

we love overcomplicated brackets made because we think we need them, and they all have to make the noise.

[@MARK6297]

Omg!!!! Please put this in production

[@tomahoks]

Please stop looking at the screen and look at us at the lens. Thank you.

[@peterferryman4905]

As always, a nice piece of work!👍👍😊👏👏👏👏

[@neilmchardy9061]

Don’t forget to weld compression tubes into all the bolting points or it’ll all come loose. Love this build

[@MassageWithKlay]

glad I wasn't the only one thinking that :D

[@confused47]

Looking good, Jeff! That is going to be a lovely strong subframe! I'm surprised though you didn't decide to stiffen up the mounting by replacing those OEM rubber mounts...? But hey, it's not my car, so you do what you want! Don't I remember you getting hold of a horizontal/vertical band saw? Wouldn't that have made better work of cutting that box section than the angle grinder? Oh, and buy two rolls of MIG wire when you go out - and then try to remember to keep one in stock! ;)

[@HomeBuiltByJeff]

I do have the band saw, I just end up going back to the drop saw because it is quicker. From memory my local only had one roll last time I was there and I forgot to get a backup later :(

[@pascaljeske7307]

And the next cool Video and Job Love it ❤️👍❤️🥂

[@trapjohnson]

Would belt servicing have been an engine out affair with the original Boxster setup? ... OR can that be handled from the top hatch?

[@HomeBuiltByJeff]

The Boxster had timing chains and definitely engine out for that.

[@silvermane9370]

Nice work! Out of curiosity are any other parts transferable from the Audi drivetrain/running gear? I was thinking front brakes in particular.

[@HomeBuiltByJeff]

No sure.

[@HansonLinek]

Why is all your steel painted blue? Is it salvaged from somewhere or is it a rustproof coating and you buy it like that?

[@HomeBuiltByJeff]

That is how it comes.

[@davidsantos5516]

Jeff, you could have down it with iron tube... Once you all so have the tube bender

[@HomeBuiltByJeff]

My tube bender die is too big.

[@cybersurfer2010]

Hi Jeff, as always great video... Could you do a vid on your work as a firefighter?

[@HomeBuiltByJeff]

No sorry, there are restrictions on what we can put on social media.

[@davyfong]

Loving this series, ... this and the Alfa. Thanks for sharing. Small suggestion: where you've bolted through the box section, I'd also weld in a compression tube (bolt hole tube) to prevent the square tube from "squishing" (technical term) when you torque up the bolts. Otherwise the bolts will not be able to be torqued up properly and may end up continuously working loose.

[@lewiseig5432]

seems you've made the big-time, a LOT more ads than ever before, congrats! lol. Great build, love to see this coming together. I'm assuming you will gusset the corners of the sub-frame, it just seems there's gonna be a lot of torque, the more support the better. congrats on all the hard work!

[@mclarenjohnf1]

Looks like you have thought long and hard about the way you want this to go. I am wondering about the sound, and the oil movement in the sump. a few have put V8 LS engines in 911's some have gone bang in a few short laps on the track, they wish they had just got the right engine. I know you did your research but have you asked or seen anyone having oil starvation. Only saying now so you can prevent any issues.

[@andrewlangford88]

Looks great! Only thing is that I would add some crash tubes to that box section. It will stiffen the whole lot up!

[@deopersad2915]

Awesome 👍🏻😀

[@martinrodgers6114]

Nice work Jeff. No job too tough for you, it seems. Hope you are doing okay with all the flooding going on down-under! Keep safe.

[@StevenAndrews]

I'm engine swapping vicariously through Jeff. Excited to see this coming along.

[@mikaeljonsson4686]

Great work, your'e amazing at fabricating everything yourself! 🤩👍

[@lolacaitlin]

Nice work Jeff , I'd definitely gusset the new subframe, as it is its likely to losange.

[@PedroFTeixeira]

Was this car from a serious bad taste person, or was it built for laughs?

[@lemmy9996]

Yes

[@fredericrike5974]

Many things to like about your cradle system- not the least of which it looks to be an easy job to drop the engine/trans combo fairly easily. No small good when even a belt change or spark plug change will be much eased by having the engine out of the car. You might want to set up a stand for it engine/trans and cradle where you could run it on the bench. I'm thinking a single plug wiring connection, AN fittings for the rad hoses and fuel lines- ten- fifteen minutes out and fifteen- twenty back in. This is turning out pretty bad a$$! Still think you should get Mrs. Jeff togged and helmeted and learning how to drive it! FR

[@HomeBuiltByJeff]

Too much work to set it up to bench run. Easier to just run it in the car.

[@fredericrike5974]

@@HomeBuiltByJeff IDK- a simple, hard to tip stand and hoses to extend the rad lines, fuel lines and a jumper to plug in through? If you planned to work right under the car up on the lift, it wouldn't be a lot. But it's your car and your shop- that is the great thing about it! No comment on Mrs, Jeff driving a race car? FR

[@charlesmiller5078]

You excel in alot of areas, but On-Site Fabrication is your best. Welding is all about penetration, looks have nothing to do with strength. Its nice to have both, but penetration is number 1 before anything else.

[@thescottishhammer7570]

That's what SHE said...

[@dudeonbike800]

@@thescottishhammer7570 took the words right out of my mouth... (Two sickos!)

[@MARK6297]

Sell those?

[@deetesmin]

I would suggest you put crush tubes in all your new subframe mounting points

[@georgefry660]

Two places I love to see you working welding and designing something behind the sewing machine

[@jimzucker]

Man, all cool but the legend says that if you stay on the Alfa you'll reach the million subs

[@The9meister]

Good video Jeff, if you are going to track day the " Rockster ", it does not hurt to over engineer it, might get home.

[@abarasabwehttam]

I didnt see it mentioned if you are using the original gearbox or was it from the Audi?

[@HomeBuiltByJeff]

Original

[@abarasabwehttam]

@@HomeBuiltByJeff I somehow missed that episode when I wrote the comment. I have since went back and seen it also. I appreciate the reply though. Really enjoying your series.

[@alanpaulick7815]

Love the way you work Jeff. It's an awesome video

[@nickmassey9104]

Great progress subframe looks good youl be able to fit a decent undertray to that

[@paulwhite7475]

Are you going to put crush tubes into the subframe bolt holes ?

[@timwhalan6417]

👍🏻🍺👏

[@nitramsunuo9242]

I have an 986S with a 997 Carrera WLS engine making around 400HP. I recommend putting in another brace to the sub frame identical to Pedro's so called "TechnoBrace". Easy to DIY in case you can't get it in Australia.

[@HomeBuiltByJeff]

My subframe will do exactly what that does ;)

[@Ren200Z_MotoringLife]

from a gearhead to another love your energy and enthusiasm

[@fractalrender]

Jeff, just noticed you should put a reinforcement under the front support it should be most close to a triangle. Since it holds all the weight of the two side bars in an inverted angle towards the moment of effort of the joint. Hope I explained ok. Hope to see it running!!

[@HomeBuiltByJeff]

Keep watching ;)

[@WickedTRX]

I see the blue square tube keeps on giving

[@mry82]

Gotta give it to you, this is a cool project!

[@nelsoncortez8729]

Ever thought of making a kit for the subframe for sale for this car and engine, it would make it easy for someone who has to do the same project. If not you could sell the idea to someone else

[@HomeBuiltByJeff]

There are others who have started to do it.

[@honestpat7789]

RMS NSW will have no problems signing off on this, right? 😂

[@HomeBuiltByJeff]

I could get it engineered and road legal, no problems, but this is a race car.

[@finchers_garage]

Your build is looking really good, Jeff! I'm following along! I can't wait to get mine back on the track! 🤘

[@HomeBuiltByJeff]

I think your page is one of the references I am using. Do you have a forum thread somewhere that goes with the photos?

[@finchers_garage]

@@HomeBuiltByJeff I'm glad you, sand others, are getting use out of the site. I made it so people could see how I did my swap and replicate it if they wanted, as well as show just how simple it can be with basic tools and know-how. I love these V8's, as well as the 1.8t's and 2.7t's, which also fit the 986/987 5 speeds and 987 6 speed. I would absolutely love to see more people attempt these swaps! I only have the Google photos album linked within my site. I didn't do a thread post anywhere. Figured a dedicated site would be better incase forum mods didn't agree with our particular form of sacrilege. 😂

[@anomamos9095]

You're doing it wrong '-} I would connect the side bars under the front bar so that it gave more clearance to the pulleys and provides some Bash protection to the sump. BUT before all that I would have taken a serious look at what could be modified to raise the engine at least another inch. From what I could see of the cover plate area some hammering folding spacing and maybe a new chunk of aluminium sheet could gain you two or more inches

[@1one3_Racing]

You need to listen to this bloke Jeff! He's done this exact same swap 50,0000,00,0000x times before and know what he is talking about!

[@anomamos9095]

@@1one3_Racing First off I was being humorous and second as far as I can tell this is the first engine conversion he's done where as I have actually done a few hundred So I am qualified to make a few suggestions.

[@1one3_Racing]

@@anomamos9095 obviously not an Australian then.....

[@jubiletabustamanteserrano2446]

Buen video amigo

[@josipperinic1823]

Great project

[@ezacher4634]

Do you plan on finish welding it in the car?

[@HomeBuiltByJeff]

Definitely not. You would never be able to get the engine out.

[@ezacher4634]

@@HomeBuiltByJeff Not weld it to the chassis. Finish welding the cradle so it doesn't warp.

[@HomeBuiltByJeff]

@@ezacher4634 Ah, yes I thought you meant weld it TO the car ;)

[@stevenwest1494]

Have you lost interest in the Alfa ferrari now? Just seems a bit strange why you're doing this car on the side when it's not an original build and it's just a collection of unremarkable German parts. I like your content, but I'm not interested in this car at all.

[@steveschriefer2733]

He does both. The last video he uploaded was the Alfa-rrari getting the flares. It's been this way for some time when he works multiple builds.