2000 C5 mods
Thread Starter
Melting Slicks
Joined: Mar 2009
Posts: 2,300
Likes: 115
From: Odessa FL
St. Jude Donor '10-'12-'13-'14-'15-'16-'17
2000 C5 mods
I own a 2000 C5 Coupe 6 speed and I am planning the following mods in an effort to increase power but remain a daily driver with manageable idle. These are only the engine mods, wheels tires brakes etc will have to come later. I wanted the opinion of the forum as whether or not these mods are well configured to work together or not. I know these types of questions must come up very often so I really do appreciate any information, opinion, advice.
The mods are as follows: (additions in Red from advice in post below)
Cold air induction with dual KN filters
FAST LSX 78mm Intake (LS6 Intake)
BBK 80mm throttle body (Z06 80mm TB)
Z06 GM 85mm MAF
LG Long tube headers and 3” X pipe into Z06 Ti mufflers
AFR 205cc heads (was thinking 62cc chambers)
(still considering head choice)
Comp Cam XFI™ RPM, XR277HR (should I upgrade valve springs etc. with this cam?)
(AFR 6016 cam)
(Tune)
(Underpulley)
(Ported oil pump, LS3 water pump and 160 Thermostat, doulble row timing chain)
Everything else will remain bone stock for now. The coupe has 55K miles on it. I was hoping to achieve 450+rwhp with these mods and remain streetable. Thanks in advance.
The mods are as follows: (additions in Red from advice in post below)
Cold air induction with dual KN filters
FAST LSX 78mm Intake (LS6 Intake)
BBK 80mm throttle body (Z06 80mm TB)
Z06 GM 85mm MAF
LG Long tube headers and 3” X pipe into Z06 Ti mufflers
AFR 205cc heads (was thinking 62cc chambers)
(still considering head choice)
Comp Cam XFI™ RPM, XR277HR (should I upgrade valve springs etc. with this cam?)
(AFR 6016 cam)
(Tune)
(Underpulley)
(Ported oil pump, LS3 water pump and 160 Thermostat, doulble row timing chain)
Everything else will remain bone stock for now. The coupe has 55K miles on it. I was hoping to achieve 450+rwhp with these mods and remain streetable. Thanks in advance.
Last edited by alxltd1; Mar 7, 2009 at 09:28 AM.
Melting Slicks
Joined: Feb 2001
Posts: 2,803
Likes: 358
From: Northville, MI
Some suggestions, ditch the dual filters and get a Veraram or Calloway true cold air, you will need bigger injectors, SVO 30's would just be about maxed at 450HP 42lb might be better, and you will NEED a very good tune. Once you get there you will shortly need a new clutch....
Thread Starter
Melting Slicks
Joined: Mar 2009
Posts: 2,300
Likes: 115
From: Odessa FL
St. Jude Donor '10-'12-'13-'14-'15-'16-'17
Thanks. I did figure on the tune should have mentioned it. The injectors I did not consider, so thanks again. And you are right about the clutch, upon achieving 450+ I doubt I will be that disciplined to keep my foot off the go pedal......
Drifting
Joined: May 2005
Posts: 1,590
Likes: 1
From: Littleton Colorado
Didn't really see any info on that cam, not that I'm an expert by any means. But, new springs would be a good idea if your going to be pushing the Vette, your cam will help dictate what springs. Any particular reason you wanted that cam? Are you more of a drag racer or road racer? Either way, I'd take a look at LG's cams since your getting his headers anyway...
Also for me the 78mm fast was not really an option, since the LS6 intake is pretty good compared to it. Sort of a $$ to benifit concern. To me it came down to the LS-6 intake now, and when I upgrade it will be to a fast 90 or 92. Talk to Tony Mamo about it, it may be better to get him to do port work on your AFRs and maybe ls-6 intake than to get the 78mm fast.
Do a search, there use to be a link around that compared the different intakes and how much they actually helped. I remember the LS-6 being one of the better ones, the fast 78 more than likely beat it but not enough for me to drop the money on it.
450 rwhp is more than do-able, but you may be on the lopey idle side of things.
Fill out your avatar, there may be people local to you that can make some recomendations or have an example of what you are looking at.
Also for me the 78mm fast was not really an option, since the LS6 intake is pretty good compared to it. Sort of a $$ to benifit concern. To me it came down to the LS-6 intake now, and when I upgrade it will be to a fast 90 or 92. Talk to Tony Mamo about it, it may be better to get him to do port work on your AFRs and maybe ls-6 intake than to get the 78mm fast.
Do a search, there use to be a link around that compared the different intakes and how much they actually helped. I remember the LS-6 being one of the better ones, the fast 78 more than likely beat it but not enough for me to drop the money on it.
450 rwhp is more than do-able, but you may be on the lopey idle side of things.
Fill out your avatar, there may be people local to you that can make some recomendations or have an example of what you are looking at.
Thread Starter
Melting Slicks
Joined: Mar 2009
Posts: 2,300
Likes: 115
From: Odessa FL
St. Jude Donor '10-'12-'13-'14-'15-'16-'17
The cam is a 224/228 @50 with 112 LSA and .534/.537 lift. Thought it would give a lope but not to bad. Comp recommends this one with the LS6 or Fast intakes. Did not consider porting the heads but will think again and contact AFR. Thanks.
Safety Car
Joined: May 2006
Posts: 3,799
Likes: 1
From: Northern Virginia
St. Jude Donor '08
I think you are going to lose a lot of streetability trying to hit 450 rwhp NA.
You are also going to spend a fair amount of $$ to get there.
Have you ever considered bolting on a supercharger. The car will retain its stock characteristics until you put your foot into it. Should be able to hit 450 rwhp easy.
The nice thing about going the FI route is that if you decide to sell car you can easily de-mod, sell the car stock and if you want sell the S/C separately.
Modded vettes are hard to sell (for good reason I might add), and you will get few cents on the dollar for each mod dollar you have spent.
If you decide to go the NA route, probably need to add the following items to your list: new timing chain, ported oil pump, and also harmonic balancer.
When you do your clutch, make sure you put in a new slave cylinder and also get a remote clutch bleeder.
Hope that helps.
You are also going to spend a fair amount of $$ to get there.
Have you ever considered bolting on a supercharger. The car will retain its stock characteristics until you put your foot into it. Should be able to hit 450 rwhp easy.
The nice thing about going the FI route is that if you decide to sell car you can easily de-mod, sell the car stock and if you want sell the S/C separately.
Modded vettes are hard to sell (for good reason I might add), and you will get few cents on the dollar for each mod dollar you have spent.
If you decide to go the NA route, probably need to add the following items to your list: new timing chain, ported oil pump, and also harmonic balancer.
When you do your clutch, make sure you put in a new slave cylinder and also get a remote clutch bleeder.
Hope that helps.
Thread Starter
Melting Slicks
Joined: Mar 2009
Posts: 2,300
Likes: 115
From: Odessa FL
St. Jude Donor '10-'12-'13-'14-'15-'16-'17
Thanks. I am an old school guy and FI always made me shutter regarding the pressure on stock internals. I am probably wrong and need to rethink. FI sounds like the quick route, getting there in one fell swoop, but going NA lets you get there as time and $ allow. Trading or selling my C5? At my age this one is it. My child will inherit a classic, though well cared for and not abused it will have been used to its fullest and really enjoyed!
Safety Car
Joined: May 2006
Posts: 3,799
Likes: 1
From: Northern Virginia
St. Jude Donor '08
Thanks. I am an old school guy and FI always made me shutter regarding the pressure on stock internals. I am probably wrong and need to rethink. FI sounds like the quick route, getting there in one fell swoop, but going NA lets you get there as time and $ allow. Trading or selling my C5? At my age this one is it. My child will inherit a classic, though well cared for and not abused it will have been used to its fullest and really enjoyed!
As long as you don't over do it on the FI you should be fine. There is an FI section on the forum where I am sure you can find some great info.
I hope you enjoy your car. I did not get one till I was older. Working on my fourth one in as many years.:o No crashes, just can't seem to get it right. I think I am okay with this one though.
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Melting Slicks
Joined: Apr 2007
Posts: 2,167
Likes: 55
From: Kempner TX
St. Jude Donor '08-'09
Thread Starter
Melting Slicks
Joined: Mar 2009
Posts: 2,300
Likes: 115
From: Odessa FL
St. Jude Donor '10-'12-'13-'14-'15-'16-'17
FI back in the world
^^I understand your misgivings. You should try driving a modded heads/cam car and an stock vette w/ FI. I guarantee you will notice a big difference in terms of drivability.
As long as you don't over do it on the FI you should be fine. There is an FI section on the forum where I am sure you can find some great info.
I hope you enjoy your car. I did not get one till I was older. Working on my fourth one in as many years.:o No crashes, just can't seem to get it right. I think I am okay with this one though.
As long as you don't over do it on the FI you should be fine. There is an FI section on the forum where I am sure you can find some great info.
I hope you enjoy your car. I did not get one till I was older. Working on my fourth one in as many years.:o No crashes, just can't seem to get it right. I think I am okay with this one though.
Thread Starter
Melting Slicks
Joined: Mar 2009
Posts: 2,300
Likes: 115
From: Odessa FL
St. Jude Donor '10-'12-'13-'14-'15-'16-'17
Do you know the specs on the cam you are running?
I saw the cam manufacturer you have in your bio and went to their sight but could not find the specs. Do you happen to know what they are for the 2X cam? Thanks. Also, are your heads from them your originals that have been modded/ported or are they new castings?
Thread Starter
Melting Slicks
Joined: Mar 2009
Posts: 2,300
Likes: 115
From: Odessa FL
St. Jude Donor '10-'12-'13-'14-'15-'16-'17
My water pump is starting to leak and the current replacement is the LS3 I believe. As far as injectors I was under the impression that the stock ones would not handle the increase to 450+rwhp. Don't know if 36lb or larger will be required.
Former Vendor
Joined: Mar 2004
Posts: 1,518
Likes: 7
From: Valencia CA
Im sure you can find a set of stock Z06 injectors that someone building a new combo needing more removed (a guy doing FI or a stroker perhaps).
Shouldn't be too difficult to find.
-Tony
Race Director
Joined: Mar 2001
Posts: 11,405
Likes: 26
From: Whippany NJ
CI 6-7-8-9 Veteran
St. Jude Donor '08-'09
NCM Sinkhole Donor
Melting Slicks
Joined: May 2006
Posts: 2,303
Likes: 40
From: Edmonton Alberta
Nice list there, you might also want to consider a timing chain upgrade as well.
P.S. 450 is very streetable, that's the territory I'm in with my upgrades.
P.S. 450 is very streetable, that's the territory I'm in with my upgrades.
Last edited by B-Vette; Mar 7, 2009 at 07:47 AM.
Thread Starter
Melting Slicks
Joined: Mar 2009
Posts: 2,300
Likes: 115
From: Odessa FL
St. Jude Donor '10-'12-'13-'14-'15-'16-'17
Tony
Thanks for the info. Your heads have a terrific reputation and are still my first choice. Given the mods I listed are the 205 heads the right choice and is a 62cc chamber correct for the mods being considered? Thanks.
Thanks for the info. Your heads have a terrific reputation and are still my first choice. Given the mods I listed are the 205 heads the right choice and is a 62cc chamber correct for the mods being considered? Thanks.
Thread Starter
Melting Slicks
Joined: Mar 2009
Posts: 2,300
Likes: 115
From: Odessa FL
St. Jude Donor '10-'12-'13-'14-'15-'16-'17
Former Vendor
Joined: Mar 2004
Posts: 1,518
Likes: 7
From: Valencia CA
Save up for a ported FAST set-up for an extra 20-25 RWHP and a bunch more throttle response. Thats a big chunk of power added without the downsides a larger cam would bring to the table to try and duplicat that match in peak gains (you would need a MUCH bigger cam to see an additional 20+ RWHP with no other changes).
Copy my former 475 RWHP 224 cammed stock shortblock combo as much as you can afford to....it doesnt get any better than that in an all around hard running 346.....the only way it could would be to increase displacement. Many people rode with me and were blown away by the power after experiencing the perfect driving manners it also retained (I could lug it around a slow corner in my neighborhood in third gear at 1000 RPM's without protest). It drove like stock (better than stock actually) and ripped when you buried the loud pedal.
Good luck....dont skimp....take your time and do it right the first time!
-Tony
Le Mans Master
Joined: Nov 2003
Posts: 8,004
Likes: 250
From: Tampa Fl
St. Jude Donor '12-'13-'14
See sig for RWHP numbers and set up. Im in tampa and if you have a 2000 C5, ill offer to tune it for free. I love helping out brother 2000"s C5ers im the tampa area
Other than Im not crazy about my clutch chatter when it gets hot ( chatter means it wants to grab grab grab ) ID used my car as a daily without and issue. I can get an easy 25-26 hwy and 15 city.
With the 3.90 gears, it cruises at 70MPH @ about 16-700 RPMS
You have a great shop right up there in odessa
Other than Im not crazy about my clutch chatter when it gets hot ( chatter means it wants to grab grab grab ) ID used my car as a daily without and issue. I can get an easy 25-26 hwy and 15 city.
With the 3.90 gears, it cruises at 70MPH @ about 16-700 RPMS
You have a great shop right up there in odessa
Last edited by phils C5 vette; Mar 8, 2009 at 08:35 PM.