Another ITB build thread

[grelland]

The sprint car Hilborn injection that Autocraft used were setup just like that. Go for it!

That's what I had in mind, so at the track, I remove the filters, and I can pretend it is one of these:

porsche horns.jpg

[grelland]

Sort of slow progress here lately, due to holiday season and a bunch of kids

But this week I have spent a couple of hours in the garage, and started with pulling the engine:

Now the engine bay is prepared for some freshening up. I will make a few new fuel lines and generally clean up a bit.

Then I placed the engine on my somewhat cluttered workbench and mocked up the cooling tin again, and discovered a few issues that need some attention.



Then I looked at the manifolds and intake angles a bit more, and ended up with something like this:


Then I received a pair of EMPI intake manifolds in the mail, and it struck me that they were quite different from the ones I had. The EMPI ones are a lot straighter, compared to the ones I had, so it should be no big issue to cut them straight off at the point where the c-c spacing is correct:


I also looked a bit more at the location of the butterflies, and it seems it will be quite straight forward to use a CSP bellcrank style linkages. I will get hold of a set, to check the clearance to the generator.

So finally some progress

[grelland]

no updates in a while, but there has actually been some progress

I have cut the EMPI manifolds, and with these, my COPs actually fit also:



I also have not yet decided whether I will use the double-day injector holder, or the more traditional fuel rails, but I have sort of concluded that I will go for the d-d holders, and make a setup with fuel rails close to the holders, so that I have the fuel circulating as in a normal fuel rail setup.

However the outside of the short manifolds will be quite busy...


I will have the flanges cut, and a friend with a TIG will help me weld them, so things are falling in place.

My oldest son (12) joined me in the garage tonight, and his little project is the fan shround and engine tin. So far he has sanded down two rounds of "pudding" and we put a layer of filler on it tonight. The plan is to paint it using hammerite black/gray paint.

[grelland]

slowly moving forward. Since I have no fancy machinery available, I pulled out my angle grinder, and cut these flanges:


Now I need to get them welded to the cut manifolds.

Thankfully spring is still a few months away...

[Max Welton]

Not bad work with the angle-grinder!

Max

[Steve Arndt]

Nice job.

[grelland]

Thanks,

Slow progress, but some paint has been applied.

Soon I will dig into the nitti-gritti details in fixing the TBs and the throttle cable, then more interesting pictures will come

[grelland]

So I started the fun part; namely to modify the TBs

I will have the throttle cable run from the accelerator pedal to the RHS TB, then a separate cable from the RHS to the LHS TB.

Since the LHS TB was the easiest one, I started on that side...

I bought a pulley from Devastator here on the forum, and made myself a little bracket that I fixed to one of the many fixing "thingeys" on the TB:

TB right.jpg

It will be a little tight against the air outlet from the fan shroud, once the flange is welded on the intake, but I should clear with a mm or two...

The TPS sits nicely on the other side of the RHS TB:

TPS.jpg

On the other side, however, the situation is a bit different, as it is quite tight towards the doghouse outlet:

TB left.jpg

TB left 2.jpg

I will also have to route the cable through the fan shroud, and I think I will have to run the cable through the outlet of the doghouse, but I guess that will not affect the air flow at all...

The TBs have a couple of holes from the butterfly axle and injectors I will not use:

holes.jpg

more holes.jpg

Anyone has a suggestion as to how to fill these? Weld? JB weld? any other epoxy-based stuff?

Lastly an overview picture again, this time with a somewhat better quality than the last:

engine.jpg

[supaninja]

I have seen fancy machined with oring injector plugs but they are all kinda pricey. You could epoxy in a piece of aluminum rod.

[grelland]

I have seen fancy machined with oring injector plugs but they are all kinda pricey. You could epoxy in a piece of aluminum rod.

That's what I was thinking. Any particular type of epoxy, or would the "regular" 2-component type from the HW store do (Araldit) ?

Roy

[supaninja]

Any quality epoxy should work fine, it doesn't get hot right there.

[grelland]

have you ever seen me drive

[grelland]

have you ever seen me drive

[supaninja]

There are some fancy ones:

http://www.efihardware.com/products/162 ... 4mm-o-ring

[MarioVelotta]

That last engine pic looks really good!