Here's why the AT engine has less power potential than the 6MT
11-10-2006, 01:42 AM
#101
I'll snap his neck.
I believe all 06 ATs were 6 speeds. One reason I got an 05 4 speed was because I could get it for dirt cheap, I imagine because it was a leftover and the 06s were coming out soon with the better engine and tranny.
11-26-2006, 02:37 PM
#103
Originally Posted by MazdaManiac
The VFAD duct is simply a bypass of the primary intake sleeve.
It doesn't really flow any more air (its path leads into the existing intake port on the airbox) and it pulls air from the same place as the primary duct, so it is no colder.
It is merely an intake noise countermeasure.
It doesn't really flow any more air (its path leads into the existing intake port on the airbox) and it pulls air from the same place as the primary duct, so it is no colder.
It is merely an intake noise countermeasure.
Closed : sleeve only supplies air
Open : sleeve + secondary duct supply air .
Last edited by Brettus; 11-26-2006 at 02:41 PM.
12-11-2006, 02:29 PM
#106
Registered
Thread Starter
This doesn't mean give up on the engine. Even the 4 port makes more power than any 13B street engine did without a turbo and I've seen completely stock 13B's boosted to over 600 rwhp before. You are merely starting from lower on the totem pole than the 6 port engines and will ultimately have less total performance potential.
12-11-2006, 02:50 PM
#107
'03 Dodge Viper
Just curious RG, what do you think about the higher torque output the 4 port has? Why is that? How do you think it will effect boosting a 4 port? Any ideas on why Pettit's charger produced higher gains (though lower overall numbers so far) than the MT engine?
Obviously there's some uncertainty here since there aren't many boosted 4 port renesis engines, but I'm interested in your opinion.
Obviously there's some uncertainty here since there aren't many boosted 4 port renesis engines, but I'm interested in your opinion.
12-11-2006, 02:55 PM
#108
Registered
Thread Starter
The port timing is more suitable for lower rpm power than the 6 port. The 4 port is still different than just a 6 port engine with 2 less ports. There are port timing differences between them as well and this affects powerband. The intake runners are also longer which is also better for lower rpm power.
12-12-2006, 02:09 AM
#109
another issue is that there will never be as much research put into the 4 port because the new autos are 6-port.
i guess there are some other 5-speed 4-ports in other countries
i guess there are some other 5-speed 4-ports in other countries
12-13-2006, 02:06 AM
#110
'03 Dodge Viper
Here's another thing I'm wondering. How will certain power addings mods affect the 4 port auto differently? Meaning, how would something like a midpipe affect a 4 port compared to the gains on a 6 port? This one has me thinking a lot.
12-13-2006, 10:47 AM
#111
Originally Posted by SlayerRX8
Here's another thing I'm wondering. How will certain power addings mods affect the 4 port auto differently? Meaning, how would something like a midpipe affect a 4 port compared to the gains on a 6 port? This one has me thinking a lot.
I was thinking of getting one.
12-13-2006, 12:05 PM
#112
I'll snap his neck.
Originally Posted by rotarygod
The port timing is more suitable for lower rpm power than the 6 port. The 4 port is still different than just a 6 port engine with 2 less ports. There are port timing differences between them as well and this affects powerband. The intake runners are also longer which is also better for lower rpm power.
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