which 75mm and plenum to get?
10-27-2007, 03:40 PM
#1
2nd Gear Member
Thread Starter
Join Date: Oct 2007
Location:
Posts: 286
which 75mm and plenum to get?
hey i was wondering what combo you guys went with and the results from them americanmuscle.com has the accufab combo, stage3motorsports.com has the C&L plenum with the 75mm bbk throttle body and they also have the dragon combo and does anyone have the trick flow plenum?
10-27-2007, 04:09 PM
#2
4th Gear Member
Join Date: Jun 2005
Location: northern MI/southern LA
Posts: 1,362
RE: which 75mm and plenum to get?
i went with the accufab tb/plm from american muscle. tests show it to be the best, but not enough to feel any differance as far as i'm concerned. so i bought it mainly for the looks.
10-27-2007, 04:37 PM
#4
TECH SAVANT
Join Date: Dec 2006
Location: Saint Augustine, FL
Posts: 10,938
RE: which 75mm and plenum to get?
I have the Pro Products (same as Trick Flow) plenum and 70 mm TB, very pleased with both--the set provided a good part of my 35+ HP over stock gain. The Accufab setup might get you another 2-3 HP, and is very nice to look at. [/align][/align]AccuFab's flow tests (click here, 1/2 way down the page) provide some good number to consider--particularly that 75 mm TB's don't flow any more than 70's (and arguably would therefore reduce charge velocity)--the plenum and intake manifold are the limiting factors. This is misleading too however because an n/a 4.6 L engine can only suck in528 CFM at 6500 rpmat 100% VE, plug in a more realistic VE of 90% and the most it canpump is 475 CFM. That's why aftermarket TBs and plenums for the GT are not the big miracle workers they can be on other cars--the stock setup is not that bad...[/align][/align]
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10-27-2007, 07:21 PM
#6
6th Gear Member
Join Date: Jan 2004
Location: United States
Posts: 12,575
RE: which 75mm and plenum to get?
I dont think I would pay the premium for the accufab stuff. All the t/b and plenum combos are going to dyno about the same...that is hardly any result on a bolton only car.
10-29-2007, 06:54 AM
#9
4th Gear Member
Join Date: Aug 2007
Location: Shelbyville, Indiana
Posts: 1,088
RE: which 75mm and plenum to get?
I went with the BBK 75 mm TB/Plenum kit. It was in preparation for installing a Procharger. I have read independent test results that say it adds 18 whp to a FI motor.
10-29-2007, 07:11 AM
#10
3rd Gear Member
Join Date: Aug 2006
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Posts: 809
RE: which 75mm and plenum to get?
ORIGINAL: Eagle2000GT
I went with the BBK 75 mm TB/Plenum kit. It was in preparation for installing a Procharger. I have read independent test results that say it adds 18 whp to a FI motor.
I went with the BBK 75 mm TB/Plenum kit. It was in preparation for installing a Procharger. I have read independent test results that say it adds 18 whp to a FI motor.
I liked the Accufab but given the gains I could not justify the price difference so I bought the tb/plenum kit and spent a few more $$ and bought some gears too.