MicroSquirt.com read only forum (Jan.15,2018)

Matt it's going to be a little while before I can get a fresh log to you, flying to South Korea on Friday for a week. I'll try and get one of the earlier logs uploaded for you to look at but I don't think anything has changed since I last uploaded to this forum. I've also had a real engine guy ...

Ok guys been a while since I've posted but I need to start finessing this setup a bit I've another truck that I want to do a similar setup on. Currently the engine idles beautifully and goes down he highway like a freight train... It's just the transient part in between that it struggles with. Has ...

this is my proposed solution, Throttle body then just upstream is a injection plenum that is 'v' banded to the TB. any comments welcome.

Matt
thanks for the reply, because of the packaging restraints i don't want to put a four square unit sideways and i need to use high impedance injectors. So i have ordered a ford 4.6l throttle body that will better allow me to fabricate an injector first then throttle setup.

one more question ...

Matt
Thanks for the info, i have just been googling for commercially available TBI units such as the FAST and some are before and some after the throttle.

I notice the GM type TBI use low resistance injectors before the throttle but most of the aftermarket units are injecting just after the ...

Steven,

I have done this on a 1.5 litre Honda 4 cylinder engine in a Prelude using a TBI from a Corvette cross-fire but in a horizontal configuration (I also have a Corvette with a 406 SBC that had a Holley 4bbl TBI only it, but that has since been converted to port injection).

It worked better ...

Matt, i appreciate the advice but why is it that you dont recommend doing this? I cannot use port injection on this engine because of the siamese ports 240-480deg firing order (i learnt this the hard way) and i don't know of any horizontal TBI setups commercially available.

I would love to go with ...

Matt
which one the side or top injection, or both?

Regards Steven

just had another thought, what about injecting into the sides as it is a flatish section?

Lance / Matt
thanks for the input i did post on the subject earlier but i didn't get a reply maybe too much verbiage. the engine is a 250 GM straight six with Siamese ports and i originally went with a port injection but that didn't work out too well. i have three inlet runners coming into a common ...