Custom 3.5L Yamaha

[Toolman]

This part of the forum needed some updates, so here are some pics from my latest build, a 1989 dedicated track SHO.

The engine was built for a Pike’s Peak hill climb car, and now finds its home in my 89. Lots of custom bits. Most notably the CNC intake and LS top hat and one-off long tube headers built by ASP. With cams and lots of head work, along with a bump in compression to complement the increase in displacement, I’m betting this will be a 300whp NA Yamaha.

Recently replaced the front end, all new PS system, new front MC and fresh fluid and bleed for the front and rear brake systems and the hydraulic clutch. Fabbed up some new fuel line, opened up the phenolic spacers and gaskets to match the intake runners, then installed the lower and upper today.

Next update should be to show where I ended up mounting the DIS and where I made a vacuum source for the FPR.

For now, enjoy these pics:

 

[Toolman]

And these:

 

[SHOnion]

WOw crazy,does it rev any higher than stock?

 

[Toolman]

WOw crazy,does it rev any higher than stock?

The intake will certainly support higher rpm, but I want to say the rev limiter is set to 78-8000.

 

[luigisho]

what tuning to make it play nice with everything?

 

[Toolman]

Currently it will be running what the previous owner ran, SCT. At some point I’ll likely swap to Haltech.

 

[Irish Pride]

I guess you have no reason to want Se7en back in the future...

 

[Toolman]

I guess you have no reason to want Se7en back in the future...

Not true. There is always room in my garage for a MB95MTX. Especially that one!

 

[Devin]

That's pretty sweet. Aside from that tiny intake though. All the kids are gonna laugh at you, while you change out your spark plugs in 10 minutes...

I really want to print some phenolic spacers at some point. I really hope that the 3D files for them manage to find their way to the internet.

Is the PCV going to a catch can and a breather valve? Why not recirculate the PCV back into the new intake?

 

[Toolman]

That's pretty sweet. Aside from that tiny intake though. All the kids are gonna laugh at you, while you change out your spark plugs in 10 minutes...

I really want to print some phenolic spacers at some point. I really hope that the 3D files for them manage to find their way to the internet.

Is the PCV going to a catch can and a breather valve? Why not recirculate the PCV back into the new intake?

I don’t know anything about PVC. And I had a catch can, and that little filter, so I figured why not!

 

[Devin]

Polyvinylchloride? It is a very useful plastic!

 

[SHOnion]

The intake will certainly support higher rpm, but I want to say the rev limiter is set to 78-8000.

absolutely wicked,I would love a high reving NA 1st gen.

 

[Zpak]

How does she sound with those beefy headers?

 

[Toolman]

How does she sound with those beefy headers?

Hope to find out this weekend! Have not yet started this combo.

 

[Kziemer]

wicked man

 

[shaldaya]

I can't wait to see more of this beauty!!

 

[Toolman]

A view from within:

 

[shaldaya]

A view from within:
View attachment 89885

Not gonna lie, I want that intake

 

[SHOMON]

We will need cold start videos posted asap.
Then you have to check the rev limiter.
Please.

 

[1badsho]

And these:View attachment 89873View attachment 89874View attachment 89875View attachment 89876View attachment 89877

Haven’t seen a phenolic spacer for a long time. Last set I got was from Josh T. They were on my ported and polished 3.2 motor with oversized SI race valves and stage II cams with adjustable sprockets. Flew Ted Breaux down to Florida to tune it (SCT wasn’t born yet ) and if memory serves me correct it dynoed around 250-260ish all motor !