Thread: Thermo Block spacer questions

hi

someone dynoed theese little pieces with a sr20de?

my concern is that

a) the runner length is changed to longer (effect on top mid low end?)
b) the injectors are moved away from their optimal(?) place more far away from the intake valves. so i wonder if the homogeneous mixture of fuel and air is effected in a negative way.


greetings ronny

Check this out: http://www.sr20-forum.com/showthread.php?t=9874

A.)


B.) Answer to this one can be found here, but I included the quotes







How they work

BTW injectors are only placed so close to the head for emissions reasons.

Placing them further away makes the mixture more uniform. Have you ever seen stand off injector setups?
http://www.youtube.com/watch?v=GsKNbsDqEPs

F1 one does (or did) run setups like these.

so it would help in emissions??^^

Yep that was the whole reason behind low ports. Low ports have the injectors closer to the cylinders then high ports.

Not 100% why it helps the emissions, but it seems like low ports have more torque, but HP wise and head flow they are lacking.

Ok Im a bit baffled with what your saying here?

I think your getting High and low ports mixed up here?

RR motors - ie Lowports make more HP from stock and with light mods than Highports dont they?

The head spacers wouldnt make a major significance on runner length, maybe lowering peak torque by 200 rpm max.

No sir, haha I know what I said.

RR motors make 145 HP because they have roller rockers (less friction) and a lighter crank.

Low ports do not have more power. In fact they have ~8WHP less power due to cam sizes. If you put the high port cam into the lowport, you should have as much HP, but the head flow will still be worse at higher RPM's.

There was an article on [url]www.sportcompactcarweb.com[/url] by Mike Kojima, but I can't seem to locate it.

Wow!! welll there you go!!! We learn something new everyday.

All this time over here everone has been chasing RR style lowport motors haha!! We always thought the lowport motors had better ports as well

hehe - who needs sequential pulse firing.

Bucket + hose over the TB's might be just as effective

The only engine that has better flow then high ports is the VE. So I would go with the VE head/manifold if possible