Thread: any Northstar powered rods ?

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Why not make it a true ITB injection system? Even with the shorter (than stock) runners of my Northstar ITB system the torque curve is only impacted to a negligible degree. I've found that many people confuse the ITB injection system (and therefore fear it) with individual carbs in regards to the tuning and sync concerns. however this concern is totally unfounded. I sinc the throttle plates once and never need to touch them again. the TBs have a trim screw in each one to fine tune the mix, but I never even bother with that. it's not that critical at all. On my setup I'm using all the stock Caddy sensors, injectors, fuel rails, MAP, IAC, everything. so if it runs on the stock injection it runs on my system. couldn't you do a similar approach on your Ford? I don't mean to knock down your approach, but I just want to share the ease of doing it the ITB way. in other words don't be afraid of the "technology". The Northstar was my first ever injection motor of any kind. If I can do it anyone can.

Lot

For the moment, I want something to drive this summer. The tb system you describe would be my next step. Selling the first one would help to finance another welder. Some of my projects are difficult to do if I have to depend on someone else and their "can't do that" approach. I enjoy the difficult and love the impossible.

What is the bore spacing on the GSXR tb's?

"I enjoy the difficult and love the impossible."
Now there's a quote I can relate to. that's exactly the mindset that got me to build my ITB setup. someone said I could not do it, so it had to be done. but now that I've built 3-4 of them I hate building any more. I've done that already! anyway. the bore spacing is about 71 MM as I recall. as you can see, I've split the two pairs apart and made a throttle shaft extension to spread the two sets further apart in order to get the needed port alignment. I also goofed when I said these were 98 TBs. they are from the 06 and 07 Gsxr600 bikes. brain fade got me. I've picked them up on fleebay for 80 bucks or so a set. sometimes less. most all will have low miles due to their source. If you decide to use these TBs let me know as I have some bits and pieces that I machined for this type project that I'd be willing to part with for a good cause like yours.

Cheers,
Lot

Now that is handy. The bore space on my lower intake is right at 70mm. What is the bore diameter of those tb's? Not sure if that was ever noted.

40MM plates on my TBs.
here's a good site to get some basic info concerning configuring your system.
http://www.dtafast.co.uk/Throttle%20...e.htm#Diameter

Lot