intake manifolds for y2k vette

**AntsSilverC5** · 06-17-2007, 02:04 AM

Im trying to think of which intake manifold to upgrade to for my y2k c5. Im looking for a good balance between price, and performance. Im thinking about simply going with the ZO6 intake, but any recommendations or suggestions? Also where should I look for one?

**vader97** · 06-17-2007, 04:55 AM

I just installed a 78mm FAST LSX intake manifold on my 97, and I'm very happy with the increased performance it gave my Vette. I have stock heads and cam, and contrary to what everyone says, it did make a difference

**AntsSilverC5** · 06-17-2007, 12:33 PM

yea, i noticed they make 78mm and 90mm, what would i need to bump up to 90mm? (a proper size throttle body im guessing). The next mod i was thinking about doing was a throttle body, followed by the intake manifold, but that would be dumb to get the wrong one for the intake im thinking about...

**AntsSilverC5** · 06-17-2007, 12:34 PM

the throttle body i mean, any ideas guys?

**'96 Z28SS** · 06-17-2007, 09:42 PM

I would go with the LS6/Z06 intake, get it without the egr provisions. Its more affordable and will still increase power. The Fast intakes are great, but can get pricey.

**NemesisZ06** · 06-18-2007, 11:50 AM

I would go with the FAST intake.

**ramrod** · 06-20-2007, 10:35 PM

Originally Posted by AntsSilverC5

the throttle body i mean, any ideas guys?

Nick Williams!

**ramrod** · 06-21-2007, 03:06 PM

I also wanted to let some of you know even thou I am running a BBK intake. I am suffering major heat retension. When my car was being dynoed there was a 30 to 40 hp loss. Hope that helps!

**powermad** · 06-23-2007, 11:47 AM

Originally Posted by NemesisZ06

I would go with the FAST intake.

Originally Posted by ramrod

Nick Williams!

Probably selling my setup by the way. FAST90, 90 Nick Williams T/B and the FAST was ported by Mamo. Paid 1150 and thats what I want for it. Never even installed just real close to doing F/I and may be the key to affording it

**slyck97** · 06-26-2007, 07:04 PM

Originally Posted by '96 Z28SS

I would go with the LS6/Z06 intake, get it without the egr provisions. Its more affordable and will still increase power. The Fast intakes are great, but can get pricey.

I agree. LS6/Z06 can be picked up at half the price of the Fast. If you ever decide you need to go bigger you can always get your money back and move on.

**Wesman** · 06-26-2007, 07:40 PM

I would definitely go with the LS6 manifold (no EGR or course) unless you are planning on going with a big heads/cam package later on. The LS6 flows more than enough for stock and mild/midrange heads and cam packages though.

**AntsSilverC5** · 06-27-2007, 07:14 PM

...the ZO6 intake is starting to sound really good performance and pricewise... guys explain me though what the heck is the EGR?

**Wesman** · 06-27-2007, 08:14 PM

Originally Posted by AntsSilverC5

...the ZO6 intake is starting to sound really good performance and pricewise... guys explain me though what the heck is the EGR?

EGR stands for "Exhaust Gas Recirculation". In other words, the system pulls exhaust gases from the manifolds and redirects them back into the intake manifold to be reburned, for cleaner emmissions, since not all of the fuel in the exhaust is burned the first time around. Essentially its a useless system that is there to get the car to clear emoissions, nothing more. Its so unimportant that 01-02 F-bodies didn't even have ERG, nor did any Corvettes.

Its easily identifiable by the EGR tube that plugs into the top front of the intake manifold, as well as the ERG valve mounted to the front of the passenger side cylinder head and the tubes that run to the manifolds.

**powermad** · 06-28-2007, 04:48 PM

Originally Posted by AntsSilverC5

...the ZO6 intake is starting to sound really good performance and pricewise... guys explain me though what the heck is the EGR?

Price-wise maybe, performance-wise definately not. I have joined in several threads about the LS6 and it seems the majority agree 4-6 HP at most. I got a whopping 4.7, same day same dyno, the shop forgot the LS6 intake and so then had to redyno immediately after the install (it took them a whopping 20 minutes and 120 dollars in labor

, but thats another story). Its ultimately up to you but I would save and get one that makes proven power, unless you wanna go F/I because the clamshell design of the FAST may wanna come apart under boost.

**AntsSilverC5** · 06-28-2007, 09:34 PM

4 to 6 hp ??? On advertisements I see up to 15hp gains at the rear wheels on westcoastcorvettes.com and thunderracing.com. I was hoping to get at least 10hp and then purchase a 80mm TB to go with it (another 6-8). But only 4-6 hp gain for a whole new ZO6 intake manifold?? that sounds kinda depressing. Anybody else put a ZO6 intake on their stock C5? what kinda results did u get ?

**AntsSilverC5** · 06-29-2007, 07:27 AM

here check this link out for ls1howto.com http://www.ls1howto.com/index.php?article=5 read the very bottom, according to the guy

"The very next day after the install I took the car to the dyno. The results were astounding! I gained a peak of 24rwhp, 14ftlbs of torque. The dyno graph on the left shows the results". Might this be because im guessing its an fbody? but even so, Fbodies ls1 i dont imagine is THAT much different than a C5 LS1 (if barely at all). I mean Id guess the C5 would get more. if personal experience differs though. i have a feeling im gonna go with the zo6 intake with a 80mm TB once i save up for it. hopefully it all works out. Ill keep you guys posted!

**ramrod** · 06-29-2007, 11:50 AM

Originally Posted by AntsSilverC5

here check this link out for ls1howto.com http://www.ls1howto.com/index.php?article=5 read the very bottom, according to the guy

"The very next day after the install I took the car to the dyno. The results were astounding! I gained a peak of 24rwhp, 14ftlbs of torque. The dyno graph on the left shows the results". Might this be because im guessing its an fbody? but even so, Fbodies ls1 i dont imagine is THAT much different than a C5 LS1 (if barely at all). I mean Id guess the C5 would get more. if personal experience differs though. i have a feeling im gonna go with the zo6 intake with a 80mm TB once i save up for it. hopefully it all works out. Ill keep you guys posted!

Get the FAST! Do it. Do it!

Not to contradict myself, but LG has a nice TB. I might toss the NW TB for it.

**powermad** · 06-30-2007, 06:02 AM

Originally Posted by AntsSilverC5

4 to 6 hp ??? Anybody else put a ZO6 intake on their stock C5? what kinda results did u get ?

Can anyone else with real world experiences post their gains. There is no way 24/14 from an LS6 intake unless they were running the LS1 on a 427 motor. My guess is that the car was untuned/improperly tuned with the old intake and after the new intake was put on it was perfected. The same way the new Z's were getting 40-50 RWHP from headers- dynoing stock then headers AND tune and many would jump from 430 to 470+ on "only" headers. Then one tuner got smart and tuned the car before and ran a baseline, headers only netted around 20-25 after that tune was good for half the gain.

The 2001 Corvette (and later C5s) were upgraded to the LS6 intake and what was the power jump from '00-'01? 345 to 350.

I can tell you that others will gain more/less, no motor is the same.

Mine was not stock by the way. Stock cubes but had Halltech Stinger intake, U/D pulley, L/T headers and a cam when those runs were made. Oh, and I was also told that it would get me 12-15 extra horses by the shop I bought it from.

**Wesman** · 06-30-2007, 04:34 PM

Originally Posted by powermad

Can anyone else with real world experiences post their gains. There is no way 24/14 from an LS6 intake unless they were running the LS1 on a 427 motor. My guess is that the car was untuned/improperly tuned with the old intake and after the new intake was put on it was perfected. The same way the new Z's were getting 40-50 RWHP from headers- dynoing stock then headers AND tune and many would jump from 430 to 470+ on "only" headers. Then one tuner got smart and tuned the car before and ran a baseline, headers only netted around 20-25 after that tune was good for half the gain.

The 2001 Corvette (and later C5s) were upgraded to the LS6 intake and what was the power jump from '00-'01? 345 to 350.

I can tell you that others will gain more/less, no motor is the same.

Mine was not stock by the way. Stock cubes but had Halltech Stinger intake, U/D pulley, L/T headers and a cam when those runs were made. Oh, and I was also told that it would get me 12-15 extra horses by the shop I bought it from.

Well you just posted a hell of a lot of speculation in regards to HP gains.

Here is what I can tell you from personal experience. I upgraded my mostly stock (lid, catback) LS1 with an LS6 manifold, no tune or anything else. I noticed an immediate difference in top-end power, from about 4500-6000RPM.

So I'd say it gave about a 10WHP-15WHP increase on the top end, there is no way I would have noticed a difference (or anyone else for that matter) if it was only 4 or 5HP.

**powermad** · 07-01-2007, 12:44 AM

There usually is speculation when it comes to HP gains. Heck my Vararam felt disappointing (didn't feel any SOTP gain) but at the track it was a different story. That should be where the real test is.