Basttion

How many dremel heads did that take, and what does that chart of the timing advance actually show?

Thanks

TTschwing

I used a straight diamond bit for the heavy metal removal, and a sanding drum for the fine stuff. On the timing, the cooler the temps at the intake manifold, the happier the ECU is and can advance timing more without fear of knock. More timing = more horsepower. That's all a 100 octane program and expensive gas does..This is cheaper and there all the time (on cheap gas!)

<img src="http://images25.fotki.com/v950/photos/7/7305/137712/timing-vi.jpg">

Basttion

Wow, very nice. Thank you. )

AudiTTboi

so you only used one of the diamond heads? and how many of the sanding heads? would cleaning the intake mani with carb cleaner hurt any? didnt know if the carb cleaner would hurt the injector seats anyone know how hard it is to replace the injector seats?

fkacct

Don't know if they're as good but they only cost $57 and are thicker than the EVOheatshield (10mm vs 6.35mm). I'm not 100% sure they'll fit the TT manifold, maybe Steve can chime in....

fkacct<ul><li><a href="http://www.034motorsport.com/product_info.php?products_id=764">http://www.034motorsport.com/product_info.php?products_id=764</a</li></ul>

GorTT

that "transition port" unit is a good idea - I may pick one up.

TTschwing

It will induce a step and turbulence at the Manifold/head junction. Since these guys don't seem to make a proper small port spacer for our engines, the transition port would only seem to be of value if you had one of those Big Port Dahlback manifolds that is a gross mismatch now..

<img src="http://www.034motorsport.com/images/SPACER_18T_TRANS_PORT2.jpg">

roadyTT

Yeah...now all you need is a group buy for EH on your intake mani

ModifiedA4

turbulence helps the air fuel 'mix'...but you also want high velocity to get the charge in there.

now its been awhile since i took fluid dynamics, but basically it boils down to a question whether a smaller ID continuous pipe flows more than a segmented pipe with a transision to a smaller ID.

i dont know the answer to that

but my best guess is whatever the effect is, it is not constant over the whole RPM range.

TTschwing

Fuel is injected upstream and is mixed with air in the runners (or carbed cars). The TT injector desigh has a long tube to get the fuel to the center of the head port opening. Injector dispersal pattern should take care of any distribution/mixing needed. Steps in the delivery route would not seem good and probably one reason why the DB manifold showed little to no gains. There is something called intake reversion as well which is part of the overall flow design and contributes to proper boost and Cylinder filling.