CAI & ATI + 5% Pulley Installed

[jayno20]

Originally Posted by CRTZL1

Do you need a tune for this 5 percent overdrive pulley and does driveability get affected at all?

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No and no. Although I'm sure a tune would gain a few more ponies.

[CRTZL1]

Originally Posted by jayno20

No and no. Although I'm sure a tune would gain a few more ponies.

I have a Rotofab intake already. With the 5 percent crank pulley added, what do you think that's giving you for additional boost and rwhp ? Is the pulley good for another 40-50 rwhp by itself?
Thanks.

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[jayno20]

Originally Posted by CRTZL1

I have a Rotofab intake already. With the 5 percent crank pulley added, what do you think that's giving you for additional boost and rwhp ? Is the pulley good for another 40-50 rwhp by itself?
Thanks.

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I think it's around 50ish with the pulley and the intake.

[JackalopeZL1]

Something does not add up.

Everyone claims 25rwhp with the rotofab alone

And 40 to 50 rwhp with the 5% pully alone..

Then jannety claims 75 with the 10%, tune and intake.. And we all see the last to be true with tons of dyno runs to back them up

I have wondered this before.. curious how much folks get with 10% pully, tune and stock air box?

I bet the 5% alone is a little less than 40 hp

[jayno20]

Originally Posted by JackalopeZL1

Something does not add up.

Everyone claims 25rwhp with the rotofab alone

And 40 to 50 rwhp with the 5% pully alone..

Then jannety claims 75 with the 10%, tune and intake.. And we all see the last to be true with tons of dyno runs to back them up

I have wondered this before.. curious how much folks get with 10% pully, tune and stock air box?

I bet the 5% alone is a little less than 40 hp

So you're saying the 5% with a rotofab is worth more than 50?

[JackalopeZL1]

No I am saying all the numbers claimed do not add up to me.. would love to see dyno numbers for all iindividuals and in different combos

[JackalopeZL1]

Here is a quote from Jannety's sight.. This is with the roto-fab and tune the way I read it... "5% Crank Pulley (Reduces package to 40 RWHP)" So this means that the 5% pulley alone could not be anywhere near 40hp


http://www.jreperformanceparts.com/2...p-package.html

[Whos_Drivin]

Originally Posted by JackalopeZL1

Something does not add up.

Everyone claims 25rwhp with the rotofab alone

And 40 to 50 rwhp with the 5% pully alone..

Then jannety claims 75 with the 10%, tune and intake.. And we all see the last to be true with tons of dyno runs to back them up

I have wondered this before.. curious how much folks get with 10% pully, tune and stock air box?

I bet the 5% alone is a little less than 40 hp

You can't add hp numbers from individual parts and expect to get the sum. That's not how mods work. Just because someone got 40 hp on a stock engine with no cai doesn't mean you will get the same on an engine with different mods.

[JackalopeZL1]

I think it is more that some figures are exaggerated. .

[Whos_Drivin]

Originally Posted by JackalopeZL1

I think it is more that some figures are exaggerated. .

Possibly, but the stock tune can only take so much with compounded mods.

[JackalopeZL1]

I was quoting "TUNED" in most of my replys above. Even posted a link.. But that being said I will go back to my original comment.. Things don't add up when people talk about these mods. I do believe Jannety with his figures though.. For most others I see the numbers as being exaggerated most of the time.

[2013 ZL1 #7860]

You can't add mod HP numbers together and expect the car to dyno that number. Everything plays and builds upon the other.

Modding 101: 15 + 30 = 45 in bench racing but actually 35 on the dyno...


Quick question to anybody that knows:

Does the stock tune adjust for the larger pulley and more boost from the 5% or 10% OD lowers?

The car runs awesome the first run of the day but then drops .3 in the 1/4 mile and 3 mph on every run after that. (still consistent but just slower)

My intention is to get it on the dyno and see but does anybody else think the computer sees the added boost and compensates or adjusts to it?

I have heard of the LNF turbo 4cyl doing this when the boost is increased slightly without a tune but not sure if it is the same for the LSA.

[JANNETTYRACING]

Originally Posted by JackalopeZL1

I was quoting "TUNED" in most of my replys above. Even posted a link.. But that being said I will go back to my original comment.. Things don't add up when people talk about these mods. I do believe Jannety with his figures though.. For most others I see the numbers as being exaggerated most of the time.

It can be confusing as some advertise Crank HP and some advertise RWHP.

I try and stick to RWHP because I can always measure before and after and show the results.

Then Many people do not do proper testing and will take a low stock number and a High finished number and advertise that Gain.

We spend a lot of time making sure the Base number is repeatable at least 3 times in a row.

The same for the finished numbers they should repeat at least 3 times in a row.

Of coarse everything must be up to full operating temp and start at the same Engine coolant, oil temp, and IAT temp every time.

Ted.

[Blueclyde]

I think people get too hung up on numbers. JRE's testing and data thread was comprehensive, although I can't seem to find that thread using the search tool. I knew immediately this was the route for me. I wanted more power, more supercharger noise and no tune. The cold air intake and 5% pulley are perfect bolt-ons for me. The car is faster and sounds way better. I recently went to a local closed course for a driver improvement course (wink). Man did the car run well and oh man is the ZL1 an awesome car. If you haven't had your ZL1 on a closed course, you should put it on your list.