Originally Posted by vipor (Post 592847)

headin' down to float the Guadalupe this weekend

Originally Posted by jamaica951 (Post 594162)

Tony call me when you have a chance please.

Originally Posted by F.I. Inc. (Post 595519)

What's up?

Send me a pm with your
number and I will call to today.

Originally Posted by Seb@SZ (Post 595754)

I wish I'd get a call back.
:icon14:

Originally Posted by Triple's (Post 593960)

Early Congratulations Tony, Wish you and the Misses all the best.

Originally Posted by F.I. Inc. (Post 582406)

Re Post so everyone can see this on the most current page!

A must read for all long tube header owners thinking of adding the GTM supercharger kit:

I wanted to chime in real bad on the GTM supercharger thread. But I have bit my tongue and out of respect for Sam and GTM I will do this in my own thread.

There is alot of talk going around that my headers "flow too well" for the HR motor due to the VVEL with the long duration and overlap.

Shumby now is a proud owner of the GTM supercharger kit for his G37 and has removed our headers due to a lack of boost and power with them. I cannot sit here for any longer and let my headers take the abuse for something else that is causing the issue. I feel that it is not a tuning issue. I feel that it is a hardware issue, i.e. the supercharger itself or the kit.

Here is the deal, headers relieve back pressure. By relieving back pressure you will have a PSI drop off (boost). The goal should be to make as a much torque and power on as little boost as possible. This is called "efficiency".

I have never in my life ever, ever, ever, installed a supercharger on a car along with headers and lost power. The only way it is possible is if the supercharger kit is inefficient. This leads me into the next phase of the topic.

I have spoke to Shumby myself over the phone and here is the information I was given:

Tony, we supercharged the car and with the headers installed along with your exhaust it only made 4 psi. Then we put a smaller pulley on it and only picked up 15 horsepower and very little boost. I was never given the boost number I might add and I don't think Shumby was either. Then I was told the headers were removed and stock manifolds along with stock cats were installed. I was told at this point the car made 6-1/2 psi. So then they took the stock cats back off and put the GTM straight test pipes on the car. Same result, the psi dropped back to a very close place to the headers. No doubt, the stock cats are much more restrictive than the long tube headers or even straight test pipes. So now the stock cats were put back on the car and oh but wait, a boost leak was found. But I was told it was minimal. Either way it is force induction and a leak is detrimental to boost and power! So naturally I asked, after the leak was rectified did you put the headers back on the car a dyno it again. The answer was no we did not!

I want to see an 8 psi stock cat, stock manifold number vs. FI long tube header 8 psi number. I would bet the farm that apples compared to apples we would make higher number across the board. If you cannot get the boost back up with the long tube headers than the supercharger itself cannot move enough volume AKA (CFM) or the supercharger kit itself is holding it back. Size of intercooler, tubing size, the way tubing is routed. A good way to see if the intercooler is efficient is to take a psi reading before it as well as after it. If the psi drop off is dramatic after it than the intercooler is not efficient. If the intercooler is efficient than it is most likely the head unit itself. It physically is just too small and cannot support enough volume to feed to motor. Bottom line you then rely on the stock cats to build the boost.

Here is where the problem lyes with that. Boost is heat and the stock cats were never intended to have #1 to have that much velocity forced through them, (especially for extended periods of time). #2 being a ceramic cat they will never hold up to that kind of abuse. Worst case scenario you send the EGT's (exhaust gas temperature) through the roof before the cat and melt it shut. I think it is a poor selling point to tell people, here is my supercharger kit please buy it. Oh by the way you need to keep stock manifolds and stock cats on the car the make the boost and in return make numbers!

If the car needed that much back pressure than explain why naturally aspirated with no air being crammed into the motor how we picked up substantial amounts of torque and also power accross the board! So until I see see an independent dyno done correctly comparing apples to apples than I am not buying the information that is being sold.

This will also be posted on the first page of this headers thread.

Thank you for taking the time to read this. The phone lines are open...

Tony

Originally Posted by earwicker7 (Post 598683)

My favorite part is where they say that they found a leak, but didn't put the headers back on after the leak was fixed, because it was "obviously" (my quotation marks... not a quote) the headers that were causing the problem.

Um, hello, did you consider the possibility that it was the leak that caused the poor numbers and not the headers? :confused::confused::confused:

Wow. Just... wow.

Originally Posted by Zat_Zuma (Post 598872)

Seeing the install and Shumby telling me where the leak was located. I know the boost loss was minimal and they could have left it the way it was and it wouldn't have made a difference with LTH's or stock headers and cats.

But Sam being the perfectionist, decided that wasn't good enough and redid the weld and stopped the minor leak.

So to answer your question: the leak did not effect the performance of the GTM SC kit.

That being said, I'm still waiting to see the HP/TRQ ratings on the dyno on a stage 2 or 3 GTM SC kit to see what it can do, regardless of the boost pressure. It's the efficiency of the power a kit makes that separates it from the rest ...... not the boost number. IF the GTM SC kit makes 500 HP @ 2 psi boost ...... I'd be impressed!

Originally Posted by XwChriswX (Post 600411)

Tony, Worked out the exchange with Semtex, you want me to give you a call again this afternoon?

Originally Posted by F.I. Inc. (Post 600399)

A boost leak is a leak regardless of how minimal it may be. The higher you try to turn the boost up the greater the leak will become. In addition, if Sam is such a perfectionist, than why was the car not dynoed with the headers after the boost leak was rectified! That is the first thing I would have done. But at that point he had already convinced Shumby to put the stock manifolds and stock cats back on the car.

Originally Posted by earwicker7 (Post 600540)

I'm glad we agree :tup:

Originally Posted by F.I. Inc. (Post 600399)

A boost leak is a leak regardless of how minimal it may be. The higher you try to turn the boost up the greater the leak will become. In addition, if Sam is such a perfectionist, than why was the car not dynoed with the headers after the boost leak was rectified! That is the first thing I would have done. But at that point he had already convinced Shumby to put the stock manifolds and stock cats back on the car.

Originally Posted by F.I. Inc. (Post 600399)

I would never market a product with the selling point of having to keep stock manifolds and cats to make power. This is HORRIBLE advice and it goes against everything that has been proven with superchargers for decades.

Originally Posted by F.I. Inc. (Post 600399)

The bottom line is that specific kit is inefficient and apparently isn't creating enough volume to make power through the headers. I have no doubt we will have no issues making power through the Stillen kit.

Originally Posted by F.I. Inc. (Post 600399)

Now you have our headers as well and are going with a larger head unit. Your results may be positive. I am in for results and hopefully from an independent dyno, not GTM's!

Thanks, Tony

Originally Posted by Zat_Zuma (Post 600693)

Your not playing nice Tony.... it has been noted

Originally Posted by earwicker7 (Post 601795)

Without proper troubleshooting (which there was not) that is a highly irresponsible comment.

Low Numbers With LTH-->Leak Discovered-->Leak Fixed-->Dyno With LTH Still On-->Low Numbers=You Can Say The LTH Don't Work

Low Numbers With LTH-->Leak Discovered-->Leak Fixed-->Just Assume The LTH Was The Cause Of The Low Numbers And Not The Leak And Put The Stock Parts Back On-->No Dyno With LTH-->Good Numbers=It May Have Been The LTH And It May Have Been The Leak But Due To Incorrect Troubleshooting You Don't Know=Major Fail

When you troubleshoot ANYTHING you only change one variable at a time. You should have only fixed the leak before the dyno (one variable) but instead you changed two variables (fixing the leak and putting the stock parts back on). A Logic 101 student with no mechanical skills could figure this out... it's frightening that a paid mechanic couldn't.

Originally Posted by earwicker7 (Post 601795)

Without proper troubleshooting (which there was not) that is a highly irresponsible comment.

Low Numbers With LTH-->Leak Discovered-->Leak Fixed-->Dyno With LTH Still On-->Low Numbers=You Can Say The LTH Don't Work

Low Numbers With LTH-->Leak Discovered-->Leak Fixed-->Just Assume The LTH Was The Cause Of The Low Numbers And Not The Leak And Put The Stock Parts Back On-->No Dyno With LTH-->Good Numbers=It May Have Been The LTH And It May Have Been The Leak But Due To Incorrect Troubleshooting You Don't Know=Major Fail

When you troubleshoot ANYTHING you only change one variable at a time. You should have only fixed the leak before the dyno (one variable) but instead you changed two variables (fixing the leak and putting the stock parts back on). A Logic 101 student with no mechanical skills could figure this out... it's frightening that a paid mechanic couldn't.

Originally Posted by XwChriswX (Post 601796)

I'm handwriting you in on the next presidential ballot. :tup:

Originally Posted by F.I. Inc. (Post 611094)

Even though I am out of town I wanted to take a moment to check in. I will be back in the office Monday July 12th and header production will resume.

Originally Posted by jnaut (Post 618257)

so, i installed my headers today.... no problems other than 3 of my 4 o2 sensors are a total loss!!2 of them stripped out on the threads and 1 ripped the welded in bung right off my factory header...wtf? anybody else have o2 sensor drama?

the header fitment is perfect!! just shitty nissan thread quality!! on another note, nissan over all bolt/nut quality is horrible, honda has so much better quailty in this area!!