dhood

I am looking to install a cold air induction system and new throttle body on my 2001 GT. Do you guys have any recomendations? What size comes with a stock GT non Bullett and what size do you recommend a 70MM or 75MM. What are the advantages of each. I am guessing an increase of about 25hp with both installed. Will I notice the difference in horse power? Are the throttle Bodies difficult to install? Thanks for your help.</P>


Dave</P>

Warprunner

Well I bought a C&L Trueflow Plenum and an Accufab 75mm Throttle body. I read that the big thing with the install is just you need an impact wrench for two screws.
The following link should answer your questions plus there are dyno-test charts to back them up.

Click Here

wpix

First of all you are not going togain 25 rwhp with just a Cold Air Pipe and largerthrottle Body. Those two parts need"helper parts" to perform their best. Remember,all after market parts must run in accord with each other -- there has to be a certain flow - a rhythm. Your first part should be the Cold air Pipe and K&amp;N Filter. Now youreplace that air restrictive plenum (the piecewith the pony on it)for a free flowing C&amp;L upper intake Plenum.Okay, your stock 65mm TB will need to be upgraded to a 75mm TB. Some would argue that 75mm is a tad too large.However, this will not hurt and you will need a larger TB later onas you continue to make modifications. Okay, you have just significantly upgraded your intake system. Air will enter the engine much faster than before. But will it exit as quick? No. In order the realize your complete hp gains, you have to convert you exhaust as free flowing as your intake, if not better. Headers are the first in order, then a catted X pipe and finally a set of Mac Catbacks with 3.5" tail pipe. You've just increased you HP synergistically --Air enters and exits the engine easy and effeciently.Engines are big air pumps. The more airyou feed them, the more power the produce.</P>


Depending on milage and engine condition, your stock 2001 GT should yield between 216 to 224 hp for a stick and about 206 to 211 for an automatic. The above mods: CAI, Plenum, TB, Headers, Catted X, and Mac Catback system will yield you 38 to 41 rwhp. Rear Wheel HP is different from BHP with is Break horsepower or flywheel horsepower. 250 rwhp is equal to 300 BHP.</P>


If you want to go TB, get your plenum first. Will you feel the added powerwith those 3 mods? Not the way you want to feel it, but it will help. But if you add the 3 part exhaust system and perhaps a set of 3:73's. Oh, yeah, boy, you will feel it. No doubt.</P>


</P>


</P>


</P>


</P>

Brian18034

Nicely done wpix!

Ghostface

excellent thread for beginners like us wpix. <IMG src=smileys/smiley8.gif border="0"></P>

04ShakinSteed

I agree with all the posts,</P>


1) Get a C&amp;L MAF system. Don't do the cold-air intake. C&amp;L yields more gain.</P>


2) If you get the C&amp;L, get the trueflow inlet pipe to give a "consistant" air flow to the TB.</P>


3) DO NOT get a 75mm TB, it is too large and will probably choke the engine with the stock plenum. DO GET a 75mm TB if you also get the C&amp;L plenum, with has been dyno tested to give the most gains. Get the Accufab or BBK 75mm TB. </P>


4) like Wpix said get a better exhaust system to yield the most out of your air induction. What goes in, must come out! The less restrictive, the better!<IMG src=smileys/smiley2.gif border="0"> First get a Cat-back exhaust (magnaflow), a catted X-pipe(magnaflow), and headers would be nice also. I would do them in that order to ease your budget. If you can do it all, GREAT!<IMG src=smileys/smiley20.gif border="0"> Oh yeah, concerning the exhaust system, I would go Magnaflow. Great sounding and great performance!</P>


Here's a link on where to buy: Great service and fast shipping. Will price match any price: C&amp;L - best price $355 from RPMOutlet. Tell them and buy from here: Tell Jayme I sent ya!</P>


</P>


CR Motorsports</P>


Good luck!</P>

N2OJunkie

</P>


</P>


Not so fast, nicely done except in the part where he recommends a "free" flow exhaust system and then contradicts himself by recommending an X-pipe with cats --&gt;big no-no. One more thing, engines are not literally "big air pumps", 3 elements are needed for internal combustion- Air (specifically Oxygen), a spark and most importantly fuel..they all have to exist together in a balanced form in order for internal combustion to happen (too much fuel-Rich condition, Bad-loss of HP) (too-much oxygen _lean condition, Super bad-detonation), no spark-no fire..I recommend the BBK CAI and 70-75 mm TB, easy to install: Follow the instructions on this website..I wont waste my mony on buying a plenum, wait for the aluminum intake to come oout soon..~$600</P>


http://multimedia.motortrend.com/hot...kcoldairlg.wmv</P>


http://multimedia.motortrend.com/hot...kthrbodylg.wmv</P>


</P>


then get rear end gears and a nice shifter (stedda tri ax is the best), then a cheap way to get some extra oxygen moleculesinto your intake and a real gain in Hp--&gt;(nitrous) <IMG src=smileys/smiley2.gif border="0"></P><edited><editID>NO2JUNKIE</editID><editDate>38020.8561574074</editDate></edited>

GSXRIntensity

NO2 likes Flowmaster...disregard his FREE FLOWING knowledge<IMG src=smileys/smiley8.gif border="0"><IMG src=smileys/smiley4.gif border="0">. He is right about the cats slowing you down, but if you get the Bassani x like I did, they'll give u the straight through adapters, so you can switch 'em out if you want.</P>


As for the 75mm t/b...w/the upper intake plenum it works great, as well as w/a blower, but if you are going to keep it stock don't go any bigger than a 70mm.</P>


Also, stay away from CAI...not worth a crap, except the Steeda, &amp; K&amp;N FIPK one, but they are not worth the money. For a little more you can get a Pro-M, or C&amp;L w/twice the benefit.</P>

N2OJunkie

</P>


</P>


CAI works fine, the fenderwell one of course, the K&amp;N FIPK is apiece of crap, is an eye sore too, all plastic.....</P><edited><editID>NO2JUNKIE</editID><editDate>38020.8859722222</editDate></edited>

wpix

You suggest using a Pro-M or C&amp;L trueflow pipe which touts big HP gains. But these units use very large Mass Air Sensors which cause near stock 4.6 2V's to run lean. Thiscreates pinging. I know about this. I had my experiences. Unless you are going to run supercharger, I would highly suggest staying with the stock sensor. As far as CAI, granted, they are not worth the money. Or should I say, they are not worth the "bang for the buck" One thing is true: engines run better on cool, dense air in the fender wellas opposed tohot air from inside the hood. ESPECIALLY in the winter with sub freezing temps.The4.6 really responds to the colder temps.As far as Magna Catted X Pipe. I run this pipe. I guarantee it delivers a 6 rwhp gain over stock. You can run this pipe w/o cats but it is very loud and it will not pass emissions and it will deliver 9 rwhp over stock, dyno tested. In regard to the C&amp;L Plenum, indeed it is worth the $189. It delivers 11 rwhp in combination with the 75mm TB. And guess what? It is C&amp;L who is developing the LOWER intake to go with the UPPER PLENUM. The two together is supposed to create dramatic HP gains. Definiately go for the plenum - absolutely, positively.