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Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

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Old 02-22-2006, 11:15 PM   #21
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Quote:
Originally Posted by bonniemaro
but what if the only thing done is flach the PCM? no other mods. like I was saying, you can get 18+ hp on a ls1 car. can these motors even see 5 more hp with just a PCM flash?
Some cars will see noticable gains, meaning more than 5 Hp because most people won't 'feel' anything less, but many will not.

If you look at SOL'* mods that is what a DHP 1.0 and an Intense Standard (or +1) is designed for, maybe the ported exhaust manifolds are not a must but will help. As SOL said, with his mods and an upgraded PCM, 20 to 30 Hp is realistic.

One of the biggest factors in tuning an L67 is the Torque Reduction logic in the PCM that'* there to help the transaxle survive. There are many conditions that will cause the PCM to retard the ignition timing. Other factors like the recovery and attack rates for the knock sensors have an impact.

Heat is another factor for an L67, more boost and/or timing may lead to detonation which will lead to Knock Retard (KR meaning retarded timing) being implemented. Even some stock L67s can see 8* of KR under boost which means they will only have up to 8.5* of ignition timing advance...pretty slow and potentially harmfull to the hypereutectic pistons. Some L67s don't suffer at all from KR and respond very well to even minor mods.

Cold Air Intakes (CAI) and a supercharger pulley size drop to 3.4", colder plugs and a PCM can make a really nice upgrade. I had a 2000 GTP before with only a CAI and 3.5" pulley and stock PCM that would run 14.20 @ 97 MPH consistently. I later put the same pulley and similar CAI on the SSEi and added an Intense PCM and could do 13.75 consistantly. I then added TOG headers and went 13.50 seconds. I later added a cam and ported heads with an intercooler and did 13.07 @ 106.5.

Long story short, there'* lot'* of power to be had with minor supporting mods but a stock L67 will have varying results just because of production tolerances.

Cheers,
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Old 02-22-2006, 11:28 PM   #22
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hmmmm, so basically these cars tuned for max power from the factory sounds like. I know the new grand prix'* are tuned down a bit because the trans doesn't qiute handle it.
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Old 02-22-2006, 11:34 PM   #23
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The end of the govorner is near.
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Old 02-23-2006, 12:45 AM   #24
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Quote:
Originally Posted by Sol
I've had both.

Both of them shifted at 6000 RPM and turned on the cooling fans early as well as when the car is shutoff. Both gave me some kind of gain.

But like said above, the DHP gave me stronger upper end power and it pulls harder at higher speeds. I was getting lots of KR from the Intense PCM from high timing too. The DHP probably got rid of some of that KR.

Overall though the car feels slightly more aggressive and quicker with the DHP.


Quote:
Originally Posted by 1993 SLE
IIRC i dont believe that there any Bonnes that are running the DHP

There are a number of Bonnies running them. ChadV has one too.
Bump...I do have a DHP 1.0 PCM in my car. My car as is in the winter is "slightly" modded. Being I live on a hill that constantly ices over, I have MPS on mine, but am running a stock diameter pulley until it stops snowing. As for Powerbands...Highend is better IMO with the 1.0, It definately is quick.
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Old 02-23-2006, 12:55 AM   #25
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i have an INTENSE unit with STOCK shiftpoints in it...

would it be smarter to stay with INTENSE and have the shiftpoints changed for $10

or

go with the DHP and return the INTENSE unit as core?

todd, whats your opinion on the DHP chip?
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Old 02-23-2006, 08:53 AM   #26
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My questions exactly Andrew...
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Old 02-23-2006, 10:12 AM   #27
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I'd hate to refer you to CGP because the word "Intense" is flame-bait over there. But a lot of GP'* with Intense PCM'* took advantage of the limited time offer $25 DHP upgrade last year. You'd get a lot of feedback, but most of it would be Intense bashing.
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Old 02-23-2006, 12:16 PM   #28
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yeah i would rather here todds input first
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Old 02-27-2006, 01:01 PM   #29
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Quote:
Originally Posted by harofreak00
i have an INTENSE unit with STOCK shiftpoints in it...

would it be smarter to stay with INTENSE and have the shiftpoints changed for $10

or

go with the DHP and return the INTENSE unit as core?

todd, whats your opinion on the DHP chip?
Functionally they are similar with minor tweaks by each company. A lot of people have said that the DHP shifts harder than ours. I have never used a DHP PCM so its hard for me to give a personal opinion on it however I will state the following regarding our PCM (and I'm only doing this in this thread because I was asked too, I intentionally stayed out to avoid conflict).

The main advantages of the INTENSE PCM'* include:

1. Our a la carte upgrades to the INTENSE™ PCM give you the ability to choose just the right settings to match your combination. In other words, if you have a mild cam and need slightly higher shift points and rev limiter, and a DTC or two disabled, you will no longer be forced to pay $300 to $600 for a custom tune or race PCM with more adjustments than you really want. We offer you the ability to cost effectively fine-tune your PCM to your exact needs!

2. Every INTENSE™ PCM is coded with the correct year, make and model of your vehicle. This means that even if your car is a 1998, 2000, 2001 or 2002, you won't be required to enter 1999 into a Tech II to perform a Crankshaft Position Variation (CASE) Learn and that this PCM is undetectable by a dealer.

3. Each PCM is written with your correct VIN, so an aftermarket VIN editor is not required.

4. In some cases, your PCM may use an operating system that isn't the most recent one available (see http://calid.gm.com for details). In these cases, we'll update you to the latest OEM code, then apply our changes. We use GM Service Programming System (SPS) for monthly updates.

5. We have complete access to hundreds of parameters within every PCM. For example, we can disable DTC'* individually in EVERY vehicle we support. There is no need to disable all of the DTC’* in some PCM’* just to turn off one DTC.

6. INTENSE™ PCM'* are processed and shipped with the same top notch service INTENSE™ has been known to provide. Most PCM'* will ship within one business day*** of your order!

7. Our PCM’* are not locked in any way. The checksum flags aren't disabled. And the Operating Systems are not changed to '0' or ' '. Anyone with editing capability can read and edit our PCM’*.

8. INTENSE™ has dynoed more 3800 FWD powered vehicles than all of our competitors combined. Each time we dyno, we learn something, and this knowledge gets plugged into our PCM code.

9. Our tunes currently hold the highest horsepower 3800 N/A dyno record (non stroked), the 3800 M90 supercharged dyno record, the overall 3800 supercharged dyno record and 3800 turbo dyno record.

10. Customers LOVE their INTENSE PCMs. Here is a link to several hundred actual testimonials:

http://www.intense-racing.com/testimonial.html#PCM

Obviously if you have a PCM editor then some of these points are moot as you have full access to customize it to what you want but for those who do not and are just getting a PCM there are some very salient points here.

Also I will also point out that all of the top 11 Bonnevilles run our PCM except for 2, 1 of which started out as an INTENSE PCM and the other is a 92 on nitrous we don't offer support for.
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Old 02-27-2006, 01:40 PM   #30
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I hope DHP or W-Body store gets on here with a comparable list. Otherwise this seems kind of biased.
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