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A big "Thank You!" to forum tuner Jeremy Formato.

I have been wrestling with a strange problem with my 06 C6 for some time. I have a Vararam CAI, 160 stat, LG LT Headers, GHL catback and 4.10 gears.

I have always had a worse than normal throttle hesitation and KR off idle and some strange spikes and dips in my high cylinder air mass that looked to be a stray air leak post-TB. I had quite a few other tuners take a look, but no one was able to fix it completely. I re-flashed with the original factory tune and tried some different things, changed couplers, gaskets etc, but thought it might be an intake gasket leak and decided to do the best we could and just live with it until I was ready to do a FAST, heads etc. We tuned around the problem, and I’ve been quietly living with it.

I had met and spoke with Jeremy Formato many months back. He was able to fix a bad tune for a friend that installed an STS Twin Turbo in his 05 LS2 GTO. Jeremy took a poorly running 475 rwhp / 505 rwtq, did a speed density tune and turned it into a 500 rwhp/550 rwtq monster that has to be driven to be believed. Although he is based in Tampa, Jeremy travels to select cities in FL and around the country to do tuning.

When I heard Jeremy was going to be tuning at a shop in Gettysburg during Carlisle Weekend (Gettysburg is a short ride from Carlisle). I decided to give him a call and see if he’d like to take a look. He said he would appreciate the chance to tackle it.

After looking at my logs and tune, he thought that we were dealing with Burst Knock and some very strange peaks and valleys in different areas of the tune. He said he was confident he could tune it out, so I said lets do it. I met him at the shop on Friday which was a blistering hot afternoon. I wanted to be sure to rule out a possible manifold gasket air leak, so I had him install one of his ported intakes and TB and we also did a PVC delete since my manifold and ports were soaked with oil after only 7K miles (Im sure that wasn’t helping detonation any). Jeremy and Nick were gentle and respectful of my car during the entire process, taking their time and ensuring everything went together smoothly and correctly, despite the 95 degree heat and humidity. We fired the car up and the scans showed my old friend KR and hesitation were still there….Jeremy was right, it was in the tune. We drove it on the dyno, and that’s when I realized just how talented Jeremy is as a tuner. I knew he was good, but it was like watching Merlin himself. The first baseline pull was 350 rwhp, and 345 rwtq. (Please view these numbers for before/after comparison only. I want to stress here that I was not looking for any peak numbers. As we all know, dyno readings vary among manufacturers, design, ambient conditions, etc. I was looking for a fix for my hesitation and KR issue. Ill never get into a debate with anyone over who has the higher numbers. If my dyno says 100 hp and it gives me a thrill when I drive, that’s all that matters to me personally…but everyone is entitled to expect different things from their cars.) I have seen other tuners work….some are interested in giving you a quick SOTP thrill, some want to get you out the door fast with a canned tune from another car, others take their time and make sure your fueling and timing is safe and optimal, but never have I ever seen a tuner calc in his head the proper coefficients to bring individual cells to Lamda. I remember sitting in Greg Banish’s class with our calculators, endlessly churning numbers to get to the same place Jeremy was doing in his head! I was astounded how quickly he went through my tables making adjustments without the help of a calculator, and without cutting and pasting from other tunes. We did a total of 5 modifications and pulls over the course of an hour or two until Jeremy was satisfied. The best pull was 380 rwhp and 374 rwtq….nice numbers for a steamy day on a dyno with 4.10 gears and the Vararam gulping for air instead of being fed. But again, I don’t care about the numbers….I wanted to know the feel.

It was then time for the road tune….Jeremy insists on road testing and tweaking the dyno tune to make it right for your car on the road. We did some back road running and Jeremy had to make 2 more small reductions to the timing table to correct a few very small KR issues in the 5K range. We ended up with a final 378.31 rwhp and 371.13 rwtq. All I can say is I am humbled and grateful, I never thought my car could have the perfect combination of smoothness, crisp and instant throttle response that I wanted. I know this is in part due to the ported intake and TB, but the problem of KR and hesitation I chased is gone and the car feels completely different. It pulls harder than ever before, I can launch far easier with the newly smooth throttle ramp without the wheel hop I used to fight. Blip the throttle, and your head snaps against the seat…on throttle response out of corners is much snappier than before as well. The sound of the engine and exhaust is even smoother, much more refined sounding than it was. I actually had Jeremy coaching me and laughing…I had grown accustomed to short shifting around 5800rpm as that’s where the power previously fell off and Id hit the rev limiter quickly after that with the 4.10s. He kept yelling “6300 Craig!!! 6300, we’re still pulling hard!” And it does, much more so than ever before…it feels like it will keep pulling hard all the way to the limiter, even with the stock heads and cam…It was never like that before no matter what I did. My good friend/ lead mechanic at my shop who accompanied me agrees; the car is transformed. I’m not a racer, just a street guy…but I cant wait to get it to the track and let Cameron make a pass to see if Jeremy is right about it being a 1/4 mile surprise for me :).

I can’t thank Jeremy enough for his time and talent. Anyone looking to make the most of his car and mods, do not hesitate to give Jeremy a call. He is a true gentleman that gives of himself and his family’s vast experience to give you the most performance and service possible.

Here is the final dyno chart, sorry I didn’t have all the runs printed. Take a look at the A/F…talk about flat!

 

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great wright up and im glad you got your problem fixed:thumbsup:
 

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What is a KR problem?

Having said that I wouldn't let Jeremy touch my car, my wife's SS Impala or my damn lawn mower - - - last time he did it made over 400 hp and I was not too happy - - but I smiled a lot!!

Really, very experienced, very talented. (hell I taught him everything) :rolling:
 

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John: Jeremy's been doing his magic on your car now for a few years.
Your most recent dyno runs shows you're gettin +380 RWHP. :thumbsup:
Do you remember what it was when it was new and bone stock?
 

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Stan,

The first dyno was 383, the second was 388 the third was 395 and the final was 403. He messes with mine a lot usually to the car's benefit. I took the FAST intake of and re-tuned but didn't dyno it but we know it is in the 39X range as the 395 was with a ported manifold.

Don't have any sheets anymore: sorry but he usually has a ton of them.

I expect we will see 380-390 with the LS3 with just an intake and tune, probably about 420-430 with long tubes added - - maybe more.

Sadly, PA has gone to CA emissions standards so the 08's sold here will be less potent. Were I to get one I would get it from Rick, get a 'residence' there with a permanent tag and re-pay the taxes in PA so I could tag it here or, if possible, tag it in ME. You need to play games now in PA to get a proper running car . . . sorry I got off the point.
 

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That's great to hear. You can tell hhe knows what he's doing by just looking at the print out. Look how smooth the HP and Torque curves are.:surprised

I'm going to have to do a little more research. Tampa is not that far from Atlanta.:thumbsup:
 

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Hell- for a great tune- Tampa is a nice little drive from NC!!!

A
 
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