1.5T Hobby-man's engine thread

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I am leaning toward putting a Wavetrac into my current trans right now. I think I'd prefer the taller final drive anyway.

Are you doing Boundary oil pump gear? I was considering that as well, but was advised it's not necessary if not raising the rev limit beyond 7k.
not the rpm that kills it afaik just change it





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Can the LSD from the SI be installed on the L15BA?

Or the whole transmission?
 
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Can the LSD from the SI be installed on the L15BA?

Or the whole transmission?
I'm not sure if anyone has tried to just transplant the LSD. Not sure they're that easy to get.

The entire trans can be put into a hatch, yes. I think it just requires the trans itself and the passenger side half shaft.
 

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I'm not sure if anyone has tried to just transplant the LSD. Not sure they're that easy to get.

The entire trans can be put into a hatch, yes. I think it just requires the trans itself and the passenger side half shaft.
But I wonder if the LSD would fit just like that.

How much would the whole transmission cost?

I will be installing the ACT clutch as soon as @edgeautosport.com sends it and I was looking into other stuff to put it since it will save labor time down the road to do this all at once...
 
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But I wonder if the LSD would fit just like that.

How much would the whole transmission cost?

I will be installing the ACT clutch as soon as @edgeautosport.com sends it and I was looking into other stuff to put it since it will save labor time down the road to do this all at once...
I can't find the LSD alone online so I'm guessing it's some kind of special part number or just not available. The only aftermarket options state they are not compatible with the Si so im guessing something is splined differently and won't just drop into an L15BA trans.

A whole trans probably runs from 1400-2000 USD depending on location and mileage. And another 200 or so for the half axle.
 

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I can't find the LSD alone online so I'm guessing it's some kind of special part number or just not available. The only aftermarket options state they are not compatible with the Si so im guessing something is splined differently and won't just drop into an L15BA trans.

A whole trans probably runs from 1400-2000 USD depending on location and mileage. And another 200 or so for the half axle.
Is this it?
https://www.hondapartsnow.com/genui...~assy~helical~limited~slip~41200-5cd-003.html
 
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Put in an order for the oil pump gears and a Wavetrac LSD this morning. :drive:

Fortunately the bearings we needed for the new motor are NOT the ones indefinitely backordered so we should hopefully have those in hand Monday.

Rods and pistons should have been here by now. Turns out they were somehow shipped to Winnipeg to a shop with a very similar name :doh: they're being forwarded to us now.
 

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A Wavetrac? those are nice but I couldn’t justify the price when I could get another transmission for $1500. You’ll have to let us all know how it does! As for the Oil Pump Gears, they’re ridiculously nice. Will you shim your pump? I decided not to because I’m worried about blowing seals out. In terms of rod bearings, which color did you need, given the codes on your crank? I found that plastigage the OEM bearings that came with my new block, they were all well within spec, so I simply transferred them. I wish we could get some race bearings for these engines.


Put in an order for the oil pump gears and a Wavetrac LSD this morning. :drive:

Fortunately the bearings we needed for the new motor are NOT the ones indefinitely backordered so we should hopefully have those in hand Monday.

Rods and pistons should have been here by now. Turns out they were somehow shipped to Winnipeg to a shop with a very similar name :doh: they're being forwarded to us now.
 
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A Wavetrac? those are nice but I couldn’t justify the price when I could get another transmission for $1500. You’ll have to let us all know how it does! As for the Oil Pump Gears, they’re ridiculously nice. Will you shim your pump? I decided not to because I’m worried about blowing seals out. In terms of rod bearings, which color did you need, given the codes on your crank? I found that plastigage the OEM bearings that came with my new block, they were all well within spec, so I simply transferred them. I wish we could get some race bearings for these engines.
Haha, I hope it's worth the price tag. I've had zero trans issues whatsoever thus far so I was hesitant to have to get the Si trans and and half axle when I could get a (what I was told) way better aftermarket LSD for my current trans. I also looked at MFactory but it was even harder to find than the Wavetrac for some reason.

We haven't discussed shimming the pump, no. I honestly don't plan at this time to push the RPM any higher than 7k or power beyond ~350whp, so this is more of an OEM+ insurance type upgrade rather than looking for more performance. When we get to installing it though, I'm happy to hear what my builder/advisor/new friend recommends.

Everything with the bearings was done over the phone, so I might not have caught all the details. I do know we are oversizing the bearings by one size. My understanding is the OE assembly leans to tighter tolerances, which is fine at OE power levels. When you start building out the motor for more power, a very slight relief in the bearing tolerances is beneficial. You may need to slide the scale up one size depending on what I understood.

I think the crank came from the factory with B size bearings (Black), which means we are going to be using C size bearings (Brown). If it came with C size bearings, we'd need D size (Green) which are the ones backordered.
 
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I looked a bit closer. Seems like the final drive ring gear on the Si bolts to the OE LSD with 14 bolts. The sport open differential and ring gear uses 10 bolts and aftermarket ones mate up to that. So I don't see any way to mate up the Si LSD into a base trans.

MFactory also makes final drive sets it seems. So you could probably put an aftermarket final drive gear and LSD into an Si trans.
 
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Put in an order for the oil pump gears and a Wavetrac LSD this morning. :drive:

Fortunately the bearings we needed for the new motor are NOT the ones indefinitely backordered so we should hopefully have those in hand Monday.

Rods and pistons should have been here by now. Turns out they were somehow shipped to Winnipeg to a shop with a very similar name :doh: they're being forwarded to us now.
that’s exciting! Whoot whoot.
 
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Mike, I know it's hard to be patient but you'll have one helluva FK7 when all this work is done. :drive:
 
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Mike, I know it's hard to be patient but you'll have one helluva FK7 when all this work is done. :drive:
I sure hope so! It'll be an FK7.5 😁
 

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