Project 914n6 -> the infamous Nissan V6 swap, new motor buildup Options

[Chris914n6]

I want to ask a curiosity question here.

Why use a WRX transmission?

Why not use a Boxster/Cayman G86-21 transmission?

My engine is the FWD version as it's more plentiful and much cheaper. The RWD 350z/G35/etc tend to get thrashed. FWD has the starter on the trans, no provision on the engine side.

Box6 disadvantages:
making a starter fit
175 lbs
short gearing
have to buy or make flywheel
small dia bellhousing
Not going to cost $100

Suby advantages:
bolt on starter
100 lbs
plenty of conversions to work from
decent gearing
coupler & axles & plate $300-500
Here is the kicker... Suby flywheel bolts on with a spacer which allows me to use all stock parts.
I can make the adapter.
Only cost $100 (IMG:style_emoticons/default/piratenanner.gif)

It's really a no brainer on my end.

[Chris914n6]

To @clayperrine Clay's question: Chris is handy and clearly likes to fab stuff so more of a DIY may appeal to him. Plus the aforementioned cost savings.
Plus, I suspect Chris is a charter member of the "mine is different/special" club! (IMG:style_emoticons/default/aktion035.gif)

That said, I've been noodling on re-powering my LS car with a Nissan V6 and, if I understand it correctly, Kennedy Engineering could supply a complete adaptor kit to the Boxster trans, if he wanted to go that way.

I think this is more your forte (IMG:style_emoticons/default/biggrin.gif) @tygaboy

Nissan VQ37VHR to PDK Adapter Kit

[ClayPerrine]

I want to ask a curiosity question here.

Why use a WRX transmission?

Why not use a Boxster/Cayman G86-21 transmission?

My engine is the FWD version as it's more plentiful and much cheaper. The RWD 350z/G35/etc tend to get thrashed. FWD has the starter on the trans, no provision on the engine side.

Box6 disadvantages:
making a starter fit
175 lbs
short gearing
have to buy or make flywheel
small dia bellhousing
Not going to cost $100

Suby advantages:
bolt on starter
100 lbs
plenty of conversions to work from
decent gearing
coupler & axles & plate $300-500
Here is the kicker... Suby flywheel bolts on with a spacer which allows me to use all stock parts.
I can make the adapter.
Only cost $100 (IMG:style_emoticons/default/piratenanner.gif)

It's really a no brainer on my end.

The starter is not a big deal to remedy, but I can't beat a 6 speed trans for $100.00.

Post picts. I want to see this setup.

[rick 918-S]

Just had to (IMG:style_emoticons/default/icon_bump.gif) this.

[76-914]

Yeah, c'mon Chris. We want to see that thing moving down the street. Is 2025 the year that you finish the build??? @Chris914n6

[rick 918-S]

Yeah, c'mon Chris. We want to see that thing moving down the street. Is 2025 the year that you finish the build??? @Chris914n6

Ya Chris, there are 24 hours in a day man! (IMG:style_emoticons/default/sawzall-smiley.gif) (IMG:style_emoticons/default/smash.gif) (IMG:style_emoticons/default/welder.gif) Red Rocks 2025 (IMG:style_emoticons/default/idea.gif)

[Chris914n6]

Alright Alright Alright (IMG:style_emoticons/default/smile.gif)

Not much going on. Been having neck issues for a while, finally looked into it and discovered Degenerative Disc Disease in my C5-C6-C7 plus L5-S1. Untreated injuries from car accidents 25-32 years ago have been taking their toll, delayed by a decent gym regiment. We'll see how good PT was in mid January. Seeing improvements but the day-to-day with PT is rough.

In the mean time...

I like to stick to actual progress updates because, well, I've been bouncing back and forth on the next steps, and you might get an clinical example of ADD.

1- Fixing the 3.0 makes sense, but the teardown didn't reveal the cause of the overheating issue. Buying a replacement is, long term, moola in the wrong direction.

2- The 3.5 is practically a whole new swap with the placement moving back 1.25" to trans stock location. So if I'm going that far, might as well adapt the Suby trans at the same time, which tops out the time/budget factor.
rick 918-S new 928/box6 adapter got me inspired to re-engineer my Suby adapter. Knocked about 10mm from the thickness to a more reasonable 22mm.

3- This weeks compromise... not kidding!
Keep the 914 trans.
I simplified the new mounts down to 'I think it's good enough' (IMG:style_emoticons/default/laugh.gif)
I'll need to cut 1.25" out of the exhaust.
Make a new adapter to mount the 3.5 timing ring on the flywheel.
Redo the wiring, but it was never that pretty anyways.
I need to 3dprint a section of the intake and relocate the battery. Will probably 3dprint the air filter box too.
Honda makes a simple cable to eTB pedal sensor.

Over the shelter indoors blistering hot summer I found a cheap PnP ecu by RusEFI. Drawback is it's canbus to gauges, soooo Arduino with a canbus shield to the rescue. Then if I add a Raspberry Pi with an LCD I get digital gauges. Not costly, but extra steps. TunerStudio (ECU tuning) just added a dedicated dash program so that works out well.

Not on the list. Better exhaust system using 4L manifolds and a 2 in muffler. WRX trans swap. Cable shifter. Tilton pedals & Box calipers. Fatter rear tires.

In a later post I'll show you what I spent this year's car budget on (IMG:style_emoticons/default/chowtime.gif)

[rick 918-S]

Been there with the back issues. I just had a injection 2 weeks ago that made my L5 issues worse!! I am pressing on regardless. The Boxster transaxle is turning out to be quite challenging. Do what you can. Take care of the back.

[mgp4591]

Alright Alright Alright (IMG:style_emoticons/default/smile.gif)

Not much going on. Been having neck issues for a while, finally looked into it and discovered Degenerative Disc Disease in my C5-C6-C7 plus L5-S1. Untreated injuries from car accidents 25-32 years ago have been taking their toll, delayed by a decent gym regiment. We'll see how good PT was in mid January. Seeing improvements but the day-to-day with PT is rough.

In the mean time...

I like to stick to actual progress updates because, well, I've been bouncing back and forth on the next steps, and you might get an clinical example of ADD.

1- Fixing the 3.0 makes sense, but the teardown didn't reveal the cause of the overheating issue. Buying a replacement is, long term, moola in the wrong direction.

2- The 3.5 is practically a whole new swap with the placement moving back 1.25" to trans stock location. So if I'm going that far, might as well adapt the Suby trans at the same time, which tops out the time/budget factor.
rick 918-S new 928/box6 adapter got me inspired to re-engineer my Suby adapter. Knocked about 10mm from the thickness to a more reasonable 22mm.

3- This weeks compromise... not kidding!
Keep the 914 trans.
I simplified the new mounts down to 'I think it's good enough' (IMG:style_emoticons/default/laugh.gif)
I'll need to cut 1.25" out of the exhaust.
Make a new adapter to mount the 3.5 timing ring on the flywheel.
Redo the wiring, but it was never that pretty anyways.
I need to 3dprint a section of the intake and relocate the battery. Will probably 3dprint the air filter box too.
Honda makes a simple cable to eTB pedal sensor.

Over the shelter indoors blistering hot summer I found a cheap PnP ecu by RusEFI. Drawback is it's canbus to gauges, soooo Arduino with a canbus shield to the rescue. Then if I add a Raspberry Pi with an LCD I get digital gauges. Not costly, but extra steps. TunerStudio (ECU tuning) just added a dedicated dash program so that works out well.

Not on the list. Better exhaust system using 4L manifolds and a 2 in muffler. WRX trans swap. Cable shifter. Tilton pedals & Box calipers. Fatter rear tires.

In a later post I'll show you what I spent this year's car budget on (IMG:style_emoticons/default/chowtime.gif)

Okay Chris... I pulled my engine for a rebuild after it started making noise and I've got a new radiator going in as well. I'll race you to have our cars done! Good luck!