How much Horsepower in my 2001 Z28

[lonewolf37]

My new set up will include;
SLP Cold air induction
K@N Filter
SLP Airbox lid
Granatelli Mass Air Flow(W/cold air tuning)
Smmoth air bellows
Throttle body bored out to 78mm
Crane roller rocker arms
JBA Shorty headers
SLP Y pipe
160 Thermostat
Throttle body bypass
reprogram with a Hypertech 3
I wonder how much horsepower I will make?

[TACE02]

why shorty headers, LTs are better for LS1s. If I had to guess though, maybe somewhere around the 330 RWHP/ 340 RWTQ give or take a couple digits. Rough guess. Every car is different though. one could see 320 and the next 330. I would also have to say the numbers will be lower if you have an automatic. Now put all that in and add a medium size cam and have it professionally tuned you can see 370+ RWHP/ 360+ RWHP.

[oneBADDz]

Let me fix this for you
My new set up will not include;
SLP Cold air induction
Granatelli Mass Air Flow(W/cold air tuning)
Smmoth air bellows
Throttle body bored out to 78mm
Crane roller rocker arms
JBA Shorty headers
SLP Y pipe
reprogram with a Hypertech 3

But it will include:
Long tube headers
Off-road y pipe
ported throttle body (either DIY or shaner)
K&N Filter
SLP Airbox lid
160 Thermostat
Dyno tune
I wonder how much horsepower I will make?

And then you can buy me some beer with the $600 dollars I just saved you since I got you more power than you would have had. Look for 350hp at the rear wheels, especially thanks to the long tubes and dyno tune. Can you work on it yourself? save up another $200 on top of what you saved doing it my way and put a cam kit in there to put over 400hp to the ground

[jmhvenom]

One badd z is right... most of the that stuff is completely pointless unless you have an extremely modded car. Hypertech is crap, you can just get a street tune to save some money I would wait for dyno tune until you have heads and cam. Smooth air bellows can be made at home depot for 5 dollars. Im very confused as to why you would want new rocker arms with a lightly modded bolt on car... hrm... save yourself some pain and frustration.

I have Airlid, bellows (cheap ones), 160thermo (didnt cost much, doesnt help much), K&N which is great, Free mods (some help there for mostly free).. Then the real stuff is Pacesetter Longstubes, Pace Ypipe, Vig 3800 stall, 3.73 gears, 3inch cutout, street tune... and it screams, for about the same amount of money you would be spending.

[oneBADDz]

Is it an auto or a 6-speed, that's the big question. I meant to ask already

[lonewolf37]

It is an auto, I wanted a 6 spd.
I bought the shorty headers due to concerns over California emissions.
The roller rocker arms were a poor man's new cam.
I intend to get a dyno tune, but I do not know where to get it done.
Guess I have more work to do.
Thanx

[oneBADDz]

Do you already have these parts then? A stall will be the best mod you could imagine, it will make it feel like a whole different car. What parts do you already have and which ones do you still need to buy? We'll help with the best hp per $ if you give us a chance

[MysticZ28]

My new set up will include;
SLP Cold air induction - No Effect
K@N Filter - No Effect
SLP Airbox lid -8 to 10 rwhp
Granatelli Mass Air Flow(W/cold air tuning) - Can cost you up to 18 rwhp
Smmoth air bellows - No Effect
Throttle body bored out to 78mm - No Effect
Crane roller rocker arms - Might get you 15 rwhp
JBA Shorty headers - Maybe 3 or 4 rwhp
SLP Y pipe - No Effect
160 Thermostat - No Effect
Throttle body bypass - No Effect
reprogram with a Hypertech 3 - If you put in the "tuning" in combo with an AM MAF you're just begging for KR ... costing you another 10 to 15 rwhp
I wonder how much horsepower I will make?

How much rwhp you make depends on what you base. I've seen '01 Z28s base anywhere from 278 rwhp(mine) to 305 rwhp .... but with your set up you may be anywhere from improving 5-10 rwhp over stock to actually losing yourself rwhp.

... I intend to get a dyno tune, but I do not know where to get it done.
Guess I have more work to do.
Thanx

Force Fed in Sacramento or Newtech in Fremont ... I personally like Nick at Newtech. But, I have lot of friends who swear by Keith at Force Fed.

Also check out www.norcal-ls1.com for the local scene in NorCal ...

[heliskiier]

prolly not more than 285-290 with that setup...like these guys are sayin, the tune's and headers are everything. I have my 00 SS w/o headers, but with good boltons, an LS6 intake and a great tune doin 325 to the wheels. Next, I'll put in a mild cam and LT's and prolly get to 360-375. Hypertech is crap. Have it done right. You don't need a dyno. You just need to get a good PCM tune put on there for your mods. They're not that expensive. With your mods, the dyno piece is only gonna yield 4-7 HP over the PCM tune...not worth the extra dyno money. Wait till you got the cam and LT's in there to hit the dyno.

[lonewolf37]

Oh Sh*********t!
I allready have all these parts and a friend of mine is about to put them on.
Where do I go from here?
Oddly enough there is an ad for Granatelli MAF on this page.
Cam or heads?

[Hi-Po]

If you cant get the out good, you can not get it in good. Really think about LT's with a good y-pipe, high flowing mufflers also. If your gonna put money in the car you right as well do it right. I agree with so many others here with you choice in mods. when i read through it i didnt understand why.
Granatelli Mass Air Flow(W/cold air tuning)- do nothing
Throttle body bored out to 78mm- might as well buy a good intake for those expensive heads you be buying later,:naughty: Its all good thou, with just a little money you gonna have this thing screamin.

[MysticZ28]

Oh Sh*********t!
I allready have all these parts and a friend of mine is about to put them on.
Where do I go from here?
Oddly enough there is an ad for Granatelli MAF on this page.
Cam or heads?

Well the good news is you haven't put the parts on.

Here's my $.02 ...

SLP Cold air induction - It doesn't do anything for rwhp, but you will see a kick in the top end .... maybe an extra mph or 2 in the traps
K@N Filter - Again no rwhp, but it's a lifetime filter if properly maintained ... and with the SLP CAI, you'll be picking up all kinds of crap off the road, so it'll pay for itself in not having to buy a new filter every couple of months
SLP Airbox lid -It's good to go
Granatelli Mass Air Flow(W/cold air tuning) - Sell it on E-bay
Smmoth air bellows - Doesn't do anything, but it does look good.
Throttle body bored out to 78mm - Again no impact on rwhp, but you may see an improvement in throttle response. If it has the bump stop mod, it's good for a little more at WOT
Crane roller rocker arms - I assume these are the 1.8s. Since you have them, put them in. But. if you do go with cam down the road, they will limit your cam options.
JBA Shorty headers and SLP Y-Pipe - OK here's where it get's tricky. Shorties in and of themselves are hardly worth the effort. But we have the pesky smog issue here in CA. So you get LTs with an ORY pipe and join the bi-annual header swap out club. But since you have the shorties and the SLP pipe - which is absolutely useless - here's an option. Put on the shorties, get a set of spare cats for the flanges and weld in a set of straight pipes and put on the SLP Y. You will need a set of O2 sims. Then every two years you can get by with just swapping out the Y-pipe and cats
160 Thermostat - Since you have it, put it in. In doesn't gain anything in and of itself. But if you ever decide to go down to SRP, in conjunction with resetting the fans, it will keep you a little cooler in the staging lanes.
Throttle body bypass - This is one of the free mods, it gives you something to do when you don't have any money and you want to do a mod ... then you you can put it in your sig on the message boards.
reprogram with a Hypertech 3 - Since you have an A4, you can use to adjust your shift points, bump the RPM and set the afore mentioned fans. If you don't use the GMAF, you can try the tuning. But, all the HPP3 is doing is adding timing and during the summer months, around here, that can cause KR issues.

Before H/C ... there are couple of other things you can do. First and formost, I don't see any mention of a new catback, safe proven and effective. A pulley is another effective mod. And with an A4 a high stall TC is a must.

Then suspension. The stock suspension is pretty easy on a 52 year old butt. But, it needs to be stiffened up to effectively plant the power an LS1 is capable of. LCAs and SFCs are the minimum.

Good Luck

[Danger731]

Keep doin research and askin questions, you are heading in the right direction.

[lonewolf37]

Thanks for the directions, my 52 year old butt will be making some changes.
Incidentally, I added up all the HP these mods promised, it came to 135 HP.
I had not thought about my transmission, I will be on the transmission thread looking into a high stall TC.

[lonewolf37]

The worst part is that I bought the MAF on ebay.

[jmhvenom]

Thanks for the directions, my 52 year old butt will be making some changes.
Incidentally, I added up all the HP these mods promised, it came to 135 HP.
I had not thought about my transmission, I will be on the transmission thread looking into a high stall TC.

Most people will be laughing about now, but we have good intentions. Adding up what they "say" will happen is not a good idea. Those mods wouldnt make 135 even at the flywheel.

Free mods, LTs, ypipe, cutout, lid, pulleys might make you 50hp. Still would be close.

[nhraformula]

im cammed, stalled, headers and just about all the other mods and im nowhere near 135 over stock rwhp

[GMS Fleet]

Granatelli Mass Air Flow(W/cold air tuning)- do nothing

Really?
http://www.granatellimotorsports.com/images/artlr/dyno005small.jpg
It does nothing?

[GMS Fleet]

The amount of tuning plus the cost of the MAF makes those gains practically nothing compared to other mods that would do so much more for the same price.

There is no tuning necessary with our MAF. I didn't say there is other mods that give you more HP per dollar. Lids & some cat-back exhausts do give more HP per dollar, but other modifications are MORE costly in comparison to HP per dollar, especially if you need a mechanic to do the install.

[oneBADDz]

There is an entire thread dedicated to that debate, take it in there. Don't f up this thread in a pissing match

[1959ls1]

Gears,gears,gears,gears,different car! I bet if you had all those mods you first said and raced the same car with no mods except gears, youd get SMOKED!

[lonewolf37]

My parts are going on tomorrow, I will try it with and without the MAF. I will let you know how it turns out.

[myk02k]

sounds like a cool idea. i read up on Chevy High Perf. magazine and they dynoed a car with their wires and MAF, but there's no such thing as too much testing. are you gonna dyno it or take it to the track?

[MysticZ28]

sounds like a cool idea. i read up on Chevy High Perf. magazine and they dynoed a car with their wires and MAF, but there's no such thing as too much testing. are you gonna dyno it or take it to the track?

I already have b-b dyno runs with an 18 rwhp loss using a GMAF

5823

Stock MAF

5824

GMAF

[jmhvenom]

nice hahaha

[myk02k]

wow. your car was running very lean though, what's up with that? your car is untuned and never used any handhelds?

[MysticZ28]

wow. your car was running very lean though, what's up with that? your car is untuned and never used any handhelds?

Lean???? 12.5 is what it is with the stock MAF ... slightly richer than the 13 optimum ... the GMAF went to 11.5 ... very rich. Look at the date on the sheet.

This was back in the day of mail order and MAFT. This was untuned, I later tuned it out to 13.5 with a MAFT ... then went to a full dyno tune after Edit came out.

Car went 12.13@114 all bolt on, in +1500 D/A @ 3650lbs raceweight.

[Granatelli]

Hi guys - I can't see how you can increase airflow and loose 18hp. If it stayed the same I would know how to address the issue. But to loose 18rwhp is a ton. We offer a guarantee so I wish you would have called. Our meters have been dyno tested a billion times and while we do get the occasional car that states it made very little difference, Never have I heard of a proven 18hp loss.

I would be more then happy to exchange or recalibrate the meter. When was it purchased and were was it purchased from?

It is uncharacteristic of our meters to go rich. We also offer 0 ohm ignition wires. These meters and wires have been tested by 100’s of people and the results are typically the same. Wires are 8 to 10 hp and the meters are good for 12 to 16.
http://www.granatellimotorsports.com/gmcoilnearplugwiresets.htm

http://www.granatellimotorsports.com/gmmaftruck.htm

[MysticZ28]

Hi guys - I can't see how you can increase airflow and loose 18hp. If it stayed the same I would know how to address the issue. But to loose 18rwhp is a ton. We offer a guarantee so I wish you would have called. Our meters have been dyno tested a billion times and while we do get the occasional car that states it made very little difference, Never have I heard of a proven 18hp loss.

I would be more then happy to exchange or recalibrate the meter. When was it purchased and were was it purchased from?

It is uncharacteristic of our meters to go rich. We also offer 0 ohm ignition wires. These meters and wires have been tested by 100’s of people and the results are typically the same. Wires are 8 to 10 hp and the meters are good for 12 to 16.
http://www.granatellimotorsports.com/gmcoilnearplugwiresets.htm

http://www.granatellimotorsports.com/gmmaftruck.htm

Don't worry, you and I are not out any bucks ... ... with no logical reason to believe that inserting a 80mm MAF in between a 75mm lid and 75mm TB w/75mm intake could actually increase airflow, I borrowed MAFs and tested them to see if they were worthwhile ... I got the same results with PACE and SLP ... I actually took SLP to the track and managed a SES light, 3* of KR and 3 tenths reduction in my ET - got booted from the old SLP board when I posted that info.

[Hawk241]

Its ironic that I caught up with this debate, last night I was fishing around on the net on about the same type of inquiry, found an archive Chevy High.Perf. magazine did one on the impala ss, Quick mods type of post, first did the k&n cold air , dynoed it and got a reasonable gain, then added edelbrock header and exhaust combo, believe they uses shorty's and and got a little more of a gain, and then used the Hypertech p.p. and was able to maximise the two bolt ons for like another 14 h.p.. Another similar post by the same magazine on a 99 camaro ss again seeing a change for the better. I was about to purchase the Hypertech P.P., last night until I read the posts above, I know that it cant compare to a dyno tune, but its got to be somewhat handy to have if your like most of us and add a mod everyonce and a while when you can afford it, and use it to attempt the most of the mod..maybe?

[lonewolf37]

The parts are on my car now, but not all of them. I have been listening to the advice. Therefore I am not using the shorty headers, and the hypertech. I also am thinking about whether to use the 160 thermostat. I read something on the Crane website that said a 160 thermostat lowers efficiency and can cost 3-4 mpg. What I am looking for now is an exhaust solution, from the block to the tailpipe that passes emissions. The jury is still out on the Granarelli MAF, I will try it both ways.
And a note for the Granatelli guys: All the horsepower "promised" for my car adds up to 135 hp increase. A lot of guys are laughing about that. If your MAF produces the "promised HP", I will say so. If it doesn't, everyone on this thread will be laughing at you.

[GA Country Boy]

Keep doin research and askin questions, you are heading in the right direction.

Good advice. It's easy to spend money on mods that don't help or mods that will be taken off later to do more meaningful mods. That's why it's best to have a long term plan for where you want to wind up.

[Danger731]

I'de like to see "unbiased" results. Good call on the shorties.

[TACE02]

The jury is still out on the Granarelli MAF, I will try it both ways.
And a note for the Granatelli guys: All the horsepower "promised" for my car adds up to 135 hp increase. A lot of guys are laughing about that. If your MAF produces the "promised HP", I will say so. If it doesn't, everyone on this thread will be laughing at you.

don't be shocked if you don't get that 135 HP increase. Personally I don't see it happening with basically exhaust upgrade and intake upgrade that u are speaking of. More like around 30-40 HP. And remember just because a company says gains of up to so many HP, does not mean that is what you will get right away. It simply means with ALL the supporting mods that 1 will get you that much of an increase. Like most header companies say up to like 40 HP gains. Well you can get that from the headers as long as you upgrade your intake, install a cam, and tune the car. Without those you might actually be looking at like 20 HP gain over stock. Each mod you do supports previous mods and future mods, and unless you maximize everything you will not get all the added up HP gains advertised.