Another Plenum Thread

Dark Knight GT · Jun 15, 2005

Ok. Does anyone have any experience with the following plenums ?

Grantelli Motorsports Plenum: http://www.jegs.com/cgi-bin/ncommerce3/ProductDisplay?prrfnbr=347300&prmenbr=361

Only 99.99 on sale at Jegs!

They also have the same plenum with a FRPP 70mm throttle body in a combo for 333.99:http://www.jegs.com/cgi-bin/ncommerce3/ProductDisplay?prrfnbr=409892&prmenbr=361

BBK Plenum: http://www.brothersperformance.com/shop/mustang/bbk1760.html

My brother ordered this piece recently. It arrived the other day and I've been polishing the inside of it for a smoother air flow surface. I'll try to post some pics once I'm done and if I get a new digital camera. BTW, its a nice piece. It should match my brothers 75mm BBK throttle body perfectly.

Mac Performance Plenum:http://www.macperformance.com/store/category.cfm?SID=3&Category_ID=775

You can buy this one polished or unpolished. Sizing is 75mm inside for either one you order. They also offer the throttle body combo's as displayed on that page.

My question is, does anyone have any experience with these plenums ? I know Accufab, Trickflow, Dragon, and C&L are all well known but I'm asking about these cause I dont know anyone who is using them. I'm really curious about the Grantelli Motorsports one. If nothing else, I might get that one just to try it out. Can't beat the price.

12amracer · Jun 15, 2005

I hgave the same plenum. Its basically a C&L with their name on it (so I heard) and from the looks of it, I believe them. For performance results, I went here, click and looked at how the C&L performed. I paid 99.00 for the Plenum, and grabbed an accufab 75mm for 180.00 off of ebay. All in all, im satisfied with the results.
Now with the downside, The spot on the back of the Plenum where the throttle cables bolt down (with the 2 bolts), was not milled back far enough for the black pc. to set flush, so I had to use my grinder to cut some material to allow for a flush seat. still not too bad for 99.00. Those along with the JLT, really gave the car some get up and go!

flashstang04 · Jun 15, 2005

Let us know, I want a cheap plenum too!!!

35thstang99 · Jun 15, 2005

i have a 70 mm tb bbk is it two small for the gms plenum for 99.00?

Dark Knight GT · Jun 15, 2005

35thstang99 said:
i have a 70 mm tb bbk is it two small for the gms plenum for 99.00?

I don't see why it would be. Most aftermarket plenums are bored 75mm on their internal surface space. As long as the throttle body isn't larger than the internal space of the plenum, you should be fine. BTW, thanks for the post 12amracer, I appreciate it. I figured there might be some fitting issues with a 99 dollar piece, but as you said, it's not bad for 99 dollars.

007 · Jun 15, 2005

I have the BBK plenum and 75mm TB. I paid less than 300 for the pair. I like the look a lot. A well made piece.

flashstang04 · Jun 15, 2005

007 said:
I have the BBK plenum and 75mm TB. I paid less than 300 for the pair. I like the look a lot. A well made piece.

seat of the pants diff??

yes..no??

007 · Jun 15, 2005

flashstang04 said:
seat of the pants diff??

yes..no??

Yeah, but I'm glad I didnt spend 400+ on the accufab. Pulleys or timing adjuster do the same for much less cash. Recently people got way carried away with the plenum stuff.

flashstang04 · Jun 15, 2005

007 said:
Yeah, but I'm glad I didnt spend 400+ on the accufab. Pulleys or timing adjuster do the same for much less cash. Recently people got way carried away with the plenum stuff.

Yeah, right around the time the almighty intake spacer came out.....sounds like it may be worth it if your timing is already bumped and pullies are installed.

007 · Jun 15, 2005

flashstang04 said:
Yeah, right around the time the almighty intake spacer came out.....sounds like it may be worth it if your timing is already bumped and pullies are installed.

I just had the mod bug, and paid 300 for them. It looks great and they was an improvement, but it drives me nuts seeing folks without gears buying plenums and throttle bodys for more cash. WTF.

flashstang04 · Jun 15, 2005

007 said:
but it drives me nuts seeing folks without gears buying plenums and throttle bodys for more cash. WTF.

WERD!!! Need more go, less show, buy the gears first!! Some people dont care about that though I guess.

12amracer · Jun 16, 2005

35thstang99 said:
i have a 70 mm tb bbk is it two small for the gms plenum for 99.00?

Nope, considering that the Stock TB is 65mm I do believe. Plus some say that 70 mm is the one to get if you are NA, and that the 75mm may result in the loss of some low-end Tq.

RedefinedGT · Jun 16, 2005

I just ordered the BBK 75mm TB, BBK Elbo, and the BBK fuel pressure regulator.... I will let you all know how it turns out. I bet it will be awesome with my new nitrous setup. Add just a bit more fuel pressure to the mix to make sure I dont have any detonation.... woot!!!

97GTSTANG · Jun 25, 2005

any update on the polished $99 plenum? was thinking of getting one also.

inferno9898 · Jun 26, 2005

i bought the MAC plenum because I thought it was the cheapest out there at the time. i ran into a couple problems during the install because of manufacturing mistakes. probably added an extra 2 hours onto the install, but its on now and works great. It was $260 for the plenum and a 70MM TB....not bad at all.

jivepepper · Jun 29, 2005

007 said:
I have the BBK plenum and 75mm TB. I paid less than 300 for the pair. I like the look a lot. A well made piece.

I have found the same combo on ebay for 318 where did you get it for 300 ?

40th GT · Aug 12, 2005

inferno9898 said:
i bought the MAC plenum because I thought it was the cheapest out there at the time. i ran into a couple problems during the install because of manufacturing mistakes. probably added an extra 2 hours onto the install, but its on now and works great. It was $260 for the plenum and a 70MM TB....not bad at all.

What kind of trouble did you run into during the install?

twogts4us · Aug 12, 2005

Dark Knight GT said:
Grantelli Motorsports Plenum:Only 99.99 on sale at Jegs!
They also have the same plenum with a FRPP 70mm throttle body in a combo for 333.99.

$234.00 - That's a pricey FRPP 70mm TB! For less than that, you can get an Accufab TB.

Fubar02GT · Aug 12, 2005

99 dollar plenum? wOOt!

crzyhrse99 · Aug 13, 2005

Fubar02GT said:
99 dollar plenum? wOOt!

if youre thinking about getting this plenum, call jegs and make sure that they send you 4 plenum bolts and the 2 egr bolts. the first one they sent me had no hardware so i thought i could use the stock bolts and ended up breaking the egr end while trying to tighten up the egr bolts . i called jegs they made it right and had no problem with the next one.

as far as sotp goes i cant tell a diff. but ive had the tb on for a couple years prior. i installed a c&l on my friends 00gt a while back and imo the only diff between the two were $60 and 2 letters.

Another Plenum Thread

Dark Knight GT

I can't get it up......ok that didn't sound right.

12amracer

flashstang04

New Member

35thstang99

Member

Dark Knight GT

I can't get it up......ok that didn't sound right.

007

flashstang04

New Member

007

flashstang04

New Member

007

flashstang04

New Member

12amracer

RedefinedGT

New Member

97GTSTANG

inferno9898

Member

jivepepper

40th GT

New Member

twogts4us

Fubar02GT

New Member

crzyhrse99

Active Member

Similar threads

Another Plenum Thread

I can't get it up......ok that didn't sound right.

New Member

Member

I can't get it up......ok that didn't sound right.

New Member

New Member

New Member

New Member

Member

New Member

New Member

Active Member

Similar threads

Privacy & Transparency

Privacy & Transparency