RotaryMan88

Got a few ??? about your mods:

1. What is this TB mod I keep hearing about?? How do I do it, is it worth it, etc?

2. How did you port your intake manifold? Did you do it yourself? How much gain did that give?

3. Why did you remove the 6 port sleeves? Is this something I could do for an HP or power gain of any kind?

4. What UD pulleys are you using(the manufacturer)?

5. Why did you use a TII fuel pump w/ 550cc secondaries? Would doing this to a regular NA help any?

Thanks for any of your help....

Agent_D

iTrader: (2)

he is pushin about 240hp thats why he needed the t2 pump and 550 injectors

mazdaspeed7

You remove the second set of throttle plates from the throttle body. Helps the TB flow a little better. Here is a how-to from Cosmodonk's site

I havent found a how-to on it yet, but there are a few other people that did it. You remove some of the aluminum where the different pieces bolt together. This helps the manifold to flow better. I did a pretty major porting on mine, probably at the limit before the manifold cracks from removing too much material. It hasnt cracked so I think it will be fine. I gained at least as much as I did from headers and dual midpipes, so prob 20-25 hp.

It helps the manifold flow better. It would probably be a waste on a nearly stock engine, but once the engine starts flowing a lot more air, its nothing more than another restriction. But it is much better that wiring your ports open. You dont lose as much low end, and you gain a little more mid and high end.

Racing beat Main pulley and dual sheave alt pulley. Would not recommend both of those together without a high-output alternator. My headlights dim when the car is below 2K rpm. I dont have any stereo amps or anything else like that. I do have an electric fan, but that makes the headlights even worse when its on.


My mods pushed my past the limits of the stock fuel system and I was leaning out really bad above 6500 rpm before. Im still running a little lean, but Im getting a fuel pressure regulator to fix that. It would only make a nearly stock engine run too rich, which would be very bad for it.

RotaryMan88

DUDE...your too cool, lol....ya answered em all..thanks! I'll look into that TB mod....

KNONFS

iTrader: (14)

Mazdaspee, Do you have a Time slip or dyno sheet? I'm not trying to knock you off, it would be great to compare gains Vs a NA with I/H/E!

Thanks

mazdaspeed7

I might be going to the track, but I doubt it. Next week is much more likely. Also, the only track near me is only 1/8 mile. I raced a 300Z TT with intake last sat, and lost by a car length and a half 0-90. I pulled ahead of him a little in 1st, he pulled the car length and a half on me in 2nd, and we were dead even in 3rd. The whole story is in the kills section.