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Slight mods/ possibly a top swap!
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billy101
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2010 Chevrolet Malibu


PostPosted: Sun May 13, 2012 9:36 pm    Post subject:  Slight mods/ possibly a top swap! Reply with quote

Hey guys. I don't know much about hardcore motor stuff like cams or heads or rockers etc, but I know that I do love the sound of a 3800 cammed Laughing

I'm getting quite a bunch of money for graduation coming up soon. Wondering if there is a way to cam my 2002 Impala LS 3.8 w/ 130k without having to do many other modifications like heads?

Basically what I'm wondering is what cam can I run, if any, on stock heads? I understand I'll have to do springs, etc but what am I looking at?

I have a new transmission with 5k miles on it so it will be able to handle the added power Smile

Or should I go the easier route and go Rockers? I've been wanting to pull the heads and reseat/grind the valves to make sure I have the most compression possible as I'm coming up on 130k miles and want to keep it running top notch.

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2002 Impala LS 3.8 -121,749 miles 11/13/2011
2001 Impala LS 3.8 - 118,510 miles. 9/2/2011. RIP - 11/12/2011
2010 Malibu LTZ 3.6 - 16,014miles. 8/20/2011.


Last edited by billy101 on Thu May 17, 2012 1:01 pm; edited 1 time in total
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outonthetiles
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1990 Volvo 240
2000 Buick Regal


PostPosted: Sun May 13, 2012 9:49 pm    Post subject:   Reply with quote

I believe ZZP and Intense both sell cams for the NA motor, that don't require you to modify the heads.

Rockers would be much easier, but they're not going to give you much of that cam lope you're looking for.

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2000 Impala LS: Getrag 284 Swapped
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billy101
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2010 Chevrolet Malibu


PostPosted: Sun May 13, 2012 10:14 pm    Post subject:   Reply with quote

outonthetiles wrote:
I believe ZZP and Intense both sell cams for the NA motor, that don't require you to modify the heads.

Rockers would be much easier, but they're not going to give you much of that cam lope you're looking for.


I was looking on ZZP at their cams...seems like the X-P HOT Cam would be good for stock heads, but I'm not too sure if I want to dig that far into the motor. That would require pulling the motor, again, which is annoying..but could be done in about 2 hours.

Won't a cam ruin MPG? Does it also affect reliability and longevity of the motor?

I read people have found an increase in MPG with just rockers. I'm going to look around and hopefully get a HV3 insert, I'm going to fab up a different intake as well so that the filter is in the fender well.

Would ER Rockers, LS6 springs be good? Should I get ZZP Custom Pushrods too, or is that too overkill?

This guy on youtube supposedly has 250whp with the following mods in his 3800 Impala..

Custom Cold-Air Intake with K&N Oval Cone Filter
Taylor Thundervolt 8.2mm Plug wires
NGK Iridium Plugs
Hypertech Max Energy Power Programmer
ZZP HV3 Intake
ZZP ER Ratio Rockers
ZZP Custom Pushrods
Lingenfelter LS6 92# Yellow Valve Springs
Magnaflow 16708 Cat-Back System

Dyno: 252.5whp, 278.5wtq on 91 Octane

http://www.youtube.com/watch?v=CifT2Jh7XeQ

_________________
2002 Impala LS 3.8 -121,749 miles 11/13/2011
2001 Impala LS 3.8 - 118,510 miles. 9/2/2011. RIP - 11/12/2011
2010 Malibu LTZ 3.6 - 16,014miles. 8/20/2011.
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outonthetiles
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2000 Buick Regal


PostPosted: Sun May 13, 2012 11:05 pm    Post subject:   Reply with quote

I haven't heard of anyone running a XP cam without boost. ZZP's GT series camshafts are meant for NA motors. A cam install can be done by lowering the rear of the subframe, and doing it through the wheel well, instead of pulling the motor. Either a cam or rockers will both increase wear on your timing chain and dampener, but valvesprings affect this as well. I don't know too much on what springs you should run, it would depend on the cam or rockers you go with and what your shift points are. I read that LS6 valvesprings can be hard on your timing chain, but L76 springs are better on it. The more mild of a cam/rockers you go with, the less of a need for better springs and the less wear on the chain and dampener.

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grimsin
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PostPosted: Mon May 14, 2012 8:55 am    Post subject:   Reply with quote

cams wreck mpg, rockers do also( adding more fuel, never a way to get better mpg) but not as badly as a cam.
you would want valve springs and such cause springs you have now are tired only only get more tired. dont want valve float.
for your mods, if your planning on doing 1 of these, i would go mild cam or rocks like Outonthetiles said.
if you want more oomph and still want to keep your mpg, i suggest plog & downpipe, reason i dont say headers(headers are cheaper$ make lil more hp) is because headers move the power band in the upper rpms, losing the downlow trq we all grown to love lol. those 2 mods followed by a hv3 and your tune your in gtp category.

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Mods:4'' HAI\L67 HVTB\HV3\ER Rockers\WP underdrive pulley\Headers\cat delete\91 octane overkill incar tune.
3.69 gears soon!!
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billy101
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PostPosted: Mon May 14, 2012 10:22 am    Post subject:   Reply with quote

I'm really thinking the ER Rockers & LS6 valve spring route, along with changing out to Viton Valve seals because they're probably due for replacement eventually.

I found a used HV3 on 3800pro for $100 shipped so I'll probably be getting that soon.

A downpipe would be great, along with a plog. I'm not too sure about droppin $170 on a downpipe with cat though, but deleting the u-bend is nice as well. Maybe a used DP? Should I go 2.5" or 3"? I have an 07 SS catback installed as well. If I get a DP from ZZP I'll get a $50 coupon for my future purchase which could be used for Rockers...hmmm

_________________
2002 Impala LS 3.8 -121,749 miles 11/13/2011
2001 Impala LS 3.8 - 118,510 miles. 9/2/2011. RIP - 11/12/2011
2010 Malibu LTZ 3.6 - 16,014miles. 8/20/2011.
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grimsin
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PostPosted: Mon May 14, 2012 12:19 pm    Post subject:   Reply with quote

dont need highflow cat as our stock cat is good for 350whp before its a restrictive issue
get used downpipe if in good condition, i got 2.5' downpipe but 3'' might not hurt
I would free up al the exhaust before addid fuel and air as exhaust is the restriction, meaning plog dwopipe or headers

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Mods:4'' HAI\L67 HVTB\HV3\ER Rockers\WP underdrive pulley\Headers\cat delete\91 octane overkill incar tune.
3.69 gears soon!!
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billy101
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PostPosted: Mon May 14, 2012 1:08 pm    Post subject:   Reply with quote

I may have a way to get a 2.5 do with cat, but I'm definitely looking into a plog, coated crossover, and a HV3 insert definitely. then after that I'll be looking into doing valvetrain work such as er rockers and springs.

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2002 Impala LS 3.8 -121,749 miles 11/13/2011
2001 Impala LS 3.8 - 118,510 miles. 9/2/2011. RIP - 11/12/2011
2010 Malibu LTZ 3.6 - 16,014miles. 8/20/2011.
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grimsin
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PostPosted: Tue May 15, 2012 8:08 am    Post subject:   Reply with quote

wouldnt bother with the cross over, kinda like the throttle body spacer, i dont beleive it will give you any benefits. I would get a highflow cat of any sort if you dont want problems wit etest, if no etest good to go, buy it up and sell the highflow cat if u aint using it thats always another option.
IF i had a do over i would get plog first, then downpipe, then hv3. I think u will feel the most out of the plog as it gives hp gains from 10000rpms to 6000rpms, hv3 only gives gains above 4200rpms.

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Mods:4'' HAI\L67 HVTB\HV3\ER Rockers\WP underdrive pulley\Headers\cat delete\91 octane overkill incar tune.
3.69 gears soon!!
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billy101
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PostPosted: Tue May 15, 2012 9:03 am    Post subject:   Reply with quote

grimsin wrote:
wouldnt bother with the cross over, kinda like the throttle body spacer, i dont beleive it will give you any benefits. I would get a highflow cat of any sort if you dont want problems wit etest, if no etest good to go, buy it up and sell the highflow cat if u aint using it thats always another option.
IF i had a do over i would get plog first, then downpipe, then hv3. I think u will feel the most out of the plog as it gives hp gains from 10000rpms to 6000rpms, hv3 only gives gains above 4200rpms.


I'll hold off on the crossover for awhile then. Will the plog seal up to the factory crossover with no problems? I'll be getting a catted zzp 2.5" aluminized downpipe, along with the plog and HV3 first. I hope to see some good gains from that. I think it will also help out with the 1-2* of kr I'm getting under WOT conditions. I have the Overkill PCM, I believe Will already has the P0420 code deleted.

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2002 Impala LS 3.8 -121,749 miles 11/13/2011
2001 Impala LS 3.8 - 118,510 miles. 9/2/2011. RIP - 11/12/2011
2010 Malibu LTZ 3.6 - 16,014miles. 8/20/2011.
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00impala123
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PostPosted: Tue May 15, 2012 11:36 am    Post subject:   Reply with quote

The coated crossover is just beneficial for knock, because it keeps the temperature of the pipe on the outside down a lot, since it runs right under the throttle body it keeps it from heating up the air coming in

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outonthetiles
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PostPosted: Tue May 15, 2012 11:37 am    Post subject:   Reply with quote

x2 on the coated crossover not being worth the $. The PLOG is meant to seal right up with the factory crossover.

If you want to save some $, I have a used 2.5in catted dp for sale..

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billy101
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PostPosted: Tue May 15, 2012 11:47 am    Post subject:   Reply with quote

outonthetiles wrote:
x2 on the coated crossover not being worth the $. The PLOG is meant to seal right up with the factory crossover.

If you want to save some $, I have a used 2.5in catted dp for sale..


good to know, iffyg has a catted dp that I am most likely going to pick up off of him. thanks for the offer though!

_________________
2002 Impala LS 3.8 -121,749 miles 11/13/2011
2001 Impala LS 3.8 - 118,510 miles. 9/2/2011. RIP - 11/12/2011
2010 Malibu LTZ 3.6 - 16,014miles. 8/20/2011.
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PostPosted: Tue May 15, 2012 1:01 pm    Post subject:   Reply with quote

Does the 3.8 route coolant through the TB?

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04ImpalaSS wrote:
How much miles are on those seats? How much pounds of ass were applied to the seat during every trip? Lol

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PostPosted: Tue May 15, 2012 1:05 pm    Post subject:   Reply with quote

you should just do a top swap...

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