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Old 10-18-2010, 06:56 PM   #1
speed racer
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Need Help ! My Tuner can only Get 390 RWHP w/ my TVS 2300

OK, guys I am getting a little freaked out here.. I just had my TVS 2300 installed on my L99 and it had the Magnuson tune on it and it ran really strong....

I eventually went to my local tuner and he was only able to get 350 RWHP with the TVS 2300 -- CAI and Exhuast....


He said it was detonating to much so he had me buy new spark plugs that were colder than the Stock plugs... He then retuned it again and said it was no longer Detonating and that was good... He was then still only able to get the car to put out 390 RWHP before it started to Detonate again....

I am a little stressed here, because when the car was stock with a CAI and Exhaust, he was able to get 334 RWHP...

Now with a $7000 SuperCharger, I have only gained 64 RWHP.....WTF !

My tuner said the only way I am going to get anything over 390 RWHP was to install headers.... I would think I should be getting atleast 450 RWHP without headers.... And with Headers maybe 500 RWHP.....

One other thing is that, when he was done with the tune it idles like crap. It used to run smooth as silk at idle, now it feels like it is missing or something... The engine is shaking a little at stop lights... WTF!!!!!


Help Me out guys.. Am I getting hosed here? He has a great reputation and I am confused.....

Last edited by speed racer; 10-18-2010 at 08:24 PM.
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Old 10-18-2010, 07:01 PM   #2
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Hard to say.

My first thought is he might be running the car in the wrong gear.If he is making the runs in 3rd gear the hp will drop alot.Should be running in 4th gear.

2nd would be - I found that the Maggies I do hate the Maggie timing table.They have it at 18 degree's in the higher rpm area and my load dyno would make it KR,even enough to hear it.So I run 12-14 degree's.

Also,the belt drive system can sometimes set off KR.This you have to be carefull with but I sometimes have to soften the KR sensativity.

Either way,it's probly something stupid.
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Old 10-18-2010, 07:02 PM   #3
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Something is definetly not right. Is it it possible you are losing boost? Clamp not tightended down enough, something similar?
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Old 10-18-2010, 07:03 PM   #4
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Originally Posted by speed racer View Post
OK, guys I am getting a little freaked out here.. I just had my TVS 2300 installed on my L99 and it had the Magnuson tune on it and it ran really strong....

I eventually went to my local tuner and he was only able to get 350 RWHP with the TVS 2300 -- CAI and Exhuast....


He said it was detonating to much so he had me buy new spark plugs that were colder than the Stock plugs... He then retuned it again and said it was no longer Detonating and that was good... He was then still only able to get the car to put out 390 RWHP before it started to Detonate again....

I am a little stressed here, because when the car was stock with a CAI and Exhaust, he was able to get 334 RWHP...

Now with a $7000 SuperCharger, I have only gained 64 RWHP.....WTF !

My tuner said the only way I am going to get anything over 390 RWHP was to install headers.... I would think I should be getting atleast 450 RWHP without headers.... And with Headers maybe 500 RWHP.....


Help Me out guys.. Am I getting hosed here? He has a great reputation and I am confused.....
Something is seriously wrong here. I know the l99 heads dont flow but that is crazy low. Edelbrock with stock pully was 527 rwhp on mine...no headers.
Detonation is a serious lean issue. I assume you are using premium fuel. What AF did he set you up at? What boost level are you putting down?
What compression are you putting down now. It almost seems like you might be already broke and running on a cylinder down. Good luck man hopefully someone else can chime in here other than showing empathy for your delima.
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Old 10-18-2010, 07:10 PM   #5
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I am running the stock 3.8 pulley on the maggie... 6 PSi Boost

I am running the highest octane we have here and that is 91....

The maggie has only been on for a week or so and the car has only 7,000 miles on it... I am getting really irritated, because he charged me $300 today and said that is the best it will do... I am Pissed Off
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Old 10-18-2010, 07:14 PM   #6
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I am running the stock 3.8 pulley on the maggie... 6 PSi Boost

I am running the highest octane we have here and that is 91....

The maggie has only been on for a week or so and the car has only 7,000 miles on it... I am getting really irritated, because he charged me $300 today and said that is the best it will do... I am Pissed Off
call ted jannetti, he can help you. i got my tune through him and data logged the setup[ with the sct and adjusted the parameters and gave me an updated tune. My car runs strong, but i have not taken it to the dyno. ask him for help he is very knowledgeable and a great guy!!
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Old 10-18-2010, 07:19 PM   #7
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There is something not right bro. I think you might need to seek another tuner or contact Magnuson on the issue. What kind of dyno was this on?
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Old 10-18-2010, 07:20 PM   #8
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Something is seriously wrong here. I know the l99 heads dont flow but that is crazy low. Edelbrock with stock pully was 527 rwhp on mine...no headers.
What is wrong with the L99 heads. I thought they were pretty good pieces.
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Old 10-18-2010, 07:20 PM   #9
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Wow, somethings not right.

Have you contacted Magnuson???

Did it come with bigger injectors? Might be starving for fuel.

My Vortec is giving me 460rwhp on my stock L99 with Corsa cat-back exhaust.
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Old 10-18-2010, 07:21 PM   #10
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Can a tune From Ted Jannity be trusted? Will it damage my engine? will it be good without being on a Dyno....

I am just pissed off..LOL I waited for ever to get my Supercharger and now it isn't worth a shit..... There has to be something wrong.... He tunes cars that put out 1000 hp all day long......
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Old 10-18-2010, 07:22 PM   #11
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Yes it came with 60 PSI injectors.. And he is using a DynoJet
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Old 10-18-2010, 07:23 PM   #12
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Wow, somethings not right.

Have you contacted Magnuson???

Did it come with bigger injectors? Might be starving for fuel.

My Vortec is giving me 460rwhp on my stock L99 with Corsa cat-back exhaust.

With NO HEADERS?
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Old 10-18-2010, 07:25 PM   #13
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Might need boost-a-pump fuel pump.

There are a lot of threads on maggies, should be some hints there.

I don't think you can just bolt it up, more has to be done.
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Old 10-18-2010, 07:26 PM   #14
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What should I be getting with my TVS 2300 with a CAI and FLowmaster American Thunder Catback exhaust (No Headers)....
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Old 10-18-2010, 07:27 PM   #15
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Nope, no headers.

Was told shorties don't do anything and don't want to void chargers warranty with long tubes.
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Old 10-18-2010, 07:29 PM   #16
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I was told by everyone that I would not need a boost a pump if I stayed with the 3.8 pulley....
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Old 10-18-2010, 07:30 PM   #17
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I thought from what I had read that the maggies were around 480rwhp.

You just have to do more to get there.

I know the edlebrock S/C starve for fuel and even require a rework of the fuel rails to get the fuel to flow correctly. Might be some of your issue.

Contact the MFG.
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Old 10-18-2010, 07:31 PM   #18
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Reality is not always what people tell you.

All it takes is MONEY!
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Old 10-18-2010, 07:34 PM   #19
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Damn I have enough money is this car.... It should be getting atleast 450RWHP without Headers....That DAMN Maggie was Expensive.... I am all bent out of shape, and trust me the wife knows it.... She is giving me my space ..LOL
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Old 10-18-2010, 07:36 PM   #20
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Can a tune From Ted Jannity be trusted? Will it damage my engine? will it be good without being on a Dyno....

I am just pissed off..LOL I waited for ever to get my Supercharger and now it isn't worth a shit..... There has to be something wrong.... He tunes cars that put out 1000 hp all day long......
yes, you can trust him....call him and he will help you out
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Old 10-18-2010, 07:37 PM   #21
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Sorry, I know the feeling.

The more we do....the more problems we get.

Nothing is easy and some people take your money without regard to doing a good job!
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Old 10-18-2010, 07:37 PM   #22
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What is wrong with the L99 heads. I thought they were pretty good pieces.
dont worry those heads do flow good i dont know why he said that, even porting them does not gain a whole lot because there that good stock, all they need is dual valve springs especially when putting in a cam. and i agree that the tuner left alot on the table, speed racer should call ted jannetty like everyone says.
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Old 10-18-2010, 07:38 PM   #23
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I would contact Ted and get a tune it will be worth every penny! I think you should be above 450 for sure. Only 60 more horse with 6psi is not right.
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Old 10-18-2010, 07:55 PM   #24
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I live in Oklahoma, is there any good tuners out here or in Texas......I would drive to someone to make this right...


How can Ted Jannity give me a good tune, without being on the dyno..
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Old 10-18-2010, 08:14 PM   #25
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I live in Oklahoma, is there any good tuners out here or in Texas......I would drive to someone to make this right...


How can Ted Jannity give me a good tune, without being on the dyno..
He has installed quite a few so he already had a very good idea of what it takes as far as a tune goes. Once you are up and running you can data log some runs and send him the files to adjust until its perfect. It takes a little longer that if he were there with you but it can get done no problem.

BTW, don't know how much boost your are running but figure about 15 rwhp per lb of boost so at 6 PSI you are only looking at about 90 rwhp more than stock. Given that you made about 340 before you should be about 430 now.

As other have mentioned you might be loosing some boost somewhere.
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