CFM Dyno Test: SVT Stock Cat vs. Offroad Pipe vs. High Flow Cat

[j0eyabs]

ii already have an aftermarket tune from focussport on my SVT, once I install this cat pipe will i need a new tune?

[dimm]

Originally Posted by CFM Focus

If we had a stock SVT available every time we needed to dyno new parts then we probably would. We're not going to remove parts already installed on our shop car just to do a "stock" vs. "new part comparison" Most of these parts do not yield a big improvement until you bundle them all together. So the long term plan for those interested in getting the most out of their SVT is to end up with all the bolt ons. We're not trying to hide anything by including a prototype induction and a tune on the same dyno. That is why we overlay all dyno charts in which the only change was the pipe. I understand your point but most shops wouldn't even take the time to do what we did.

Something else, our SVT seems to be making lower numbers than normal which has been known to happen sometimes. Does that mean you shouldn't get the tune or the pipe for your SVT? No, just means the results will vary slightly between vehicles due to different variables. Dyno charts should be used "for reference only"

If you can provide a "stock" SVT Focus we will be more than glad to do what you suggested.

Never stated you were trying to hide anything at all. Most shops do do what you did when they want to sell there product which I don't disagree with.

Heffner does it all the time to sell his products. Starts with a base viper then slowly adds mods to it with a dyno on each one comparing it to stock.

But he never says....check out this dyno with my high flow cat pipe vs. everyone else.

Then later says....hey sorry forgot to tell you your results will vary cause I got a 300hp turbo kit on the car but if it makes you feel any better the numbers vary and our car put out lower hp stock then most other vipers......

How hard is it for you to flash the old tune back on to the ecu, and put the old air box back on?
I'm not that stupid. You make it sound like you've got a v8 conversion in the damn car and it'll take 3 months to get it back to normal to do the test. 10 mins to flash back to stock, 15 mins to put the old air-box back on. bout 20 minutes to drive the car to get it used to the old tune, 25-30 mins for the cat change out considering the bolts and everything are fresh.

The most cost you will be incuring is labor and wear and tear on the dyno. Considering you want to sell your parts you can make that up in the end.

Another fellow jetter shouldn't have to point out you've got a sct tune on the car before you say anything.

[jr_psychologist]

Originally Posted by dimm

Another fellow jetter shouldn't have to point out you've got a sct tune on the car before you say anything.

IMHO, the only valid point you have - and it's a good one. Standard practice is to list all the mods on the baseline run and CFM didn't do that. I disagree that they *should* have all dynos be done with just the part in question against bone stock. Agreed that it shouldn't be the part on top of FI/nitrous, but against a tune (that you ought to have anyway) and an intake (which is usually the first mod people do) - not a big deal. You're talking about a difference with all the other bolt-ons that is smaller than the range of stock dynos people have posted.

Tune, UDP, CAI, exhaust, exhaust cam will get you around 10-15 whp, while as I stated before stock dynos run a range of 15 whp or so. The difference between individual cars is as significant or greater than the the difference between stock and bolt-ons. So, just listing the mods in the baseline that are being compared against is more important than comparing just the single part against stock. Ideally, it would have a plot for the test car stock, then baseline w/o the part, then the test run with the part installed.

To say that they should dyno the car with your setup as a baseline - REGARDLESS OF WHAT YOUR SETUP IS, STOCK OR OTHERWISE - is a bit silly IMHO.

[CFM Focus]

Originally Posted by j0eyabs

ii already have an aftermarket tune from focussport on my SVT, once I install this cat pipe will i need a new tune?

You will not need a new tune.

[j0eyabs]

thanks

[dimm]

Sounds insane....I actually have no problem with cfm...my first ordering experience was a bit scary....took two weeks to get a part to me, but that was something that happened in house though.

The build quality of the billet dsi clip was second to none as far as that goes and very happy to see they included two of the hold down clips for the dsi clip.

If the piping for the cat pipe is mild steel then I don't want that crap on my car, i've had enough problems with crap mild steel and high heat areas. I saw the weld one person commented on in the picture after looking closely.
There talking about the pit. Not to much of a concern but it does show that somebody started and stoped abruptly in that area causing the deep pit. For some people that would raise major concerns....but were not flying the space shuttle or building airline seats, not much to worry about at all.

Just hope this product isn't crap mild steel. If it is then it isn't worth the price. The only thing IMO that is worth the price in that case would be the magnaflow cat. That is not a cheap choice in product.

Just please post the other mods you have done to the car in the dyno for future sake and less negative discussions....makes it appear more honest, your the proffesionals.....shouldn't have some backyard mechanic point out what the professional left out....ya tend to kinda lose credibility in most peoples books.

[oskarSVTee]

Originally Posted by CFM Focus

Maybe next week if the welding doesn't get delayed again.

Great. Actually with the extreme heat we've been having lately here in the Phoenix area I'm in no big hurry to crawl under the car in a garage at 110+ degrees. BTW, that's inside the garage.

Ron

[SuperFlea]

dimm has a good point, but really, i don't think CFM, a big company that has been around for several years, with high standards and a very good rep would sell crap to people. They are not stupid, nor the average consumer. I gotta go with Jr Psychologist, he basically covered everthing.

[Spatakula]

if anyone is interested, here is a clip with my CFM cat on with the stock exhaust...

i posted it in another thread but i think this would be the right place to post it...

from inside the car.


and a quick fly by


yes i know the videos suck but the only thing you really need to hear is the cat

-spatakula

[Fordson]

Originally Posted by jr_psychologist

IMHO, the only valid point you have - and it's a good one. Standard practice is to list all the mods on the baseline run and CFM didn't do that. I disagree that they *should* have all dynos be done with just the part in question against bone stock. Agreed that it shouldn't be the part on top of FI/nitrous, but against a tune (that you ought to have anyway) and an intake (which is usually the first mod people do) - not a big deal. You're talking about a difference with all the other bolt-ons that is smaller than the range of stock dynos people have posted.

Tune, UDP, CAI, exhaust, exhaust cam will get you around 10-15 whp, while as I stated before stock dynos run a range of 15 whp or so. The difference between individual cars is as significant or greater than the the difference between stock and bolt-ons. So, just listing the mods in the baseline that are being compared against is more important than comparing just the single part against stock. Ideally, it would have a plot for the test car stock, then baseline w/o the part, then the test run with the part installed.

To say that they should dyno the car with your setup as a baseline - REGARDLESS OF WHAT YOUR SETUP IS, STOCK OR OTHERWISE - is a bit silly IMHO.

Wait a minute, now - CFM started this thread on 5/13, and by 5/15 less than two days later I had pointed out that the torque and hp curves looked like the car had a tune on it, and later that same day, CFM confirmed that it was the std. SCT tune. This was back on page one of the thread...so I'm not sure that he's tried to snow anyone, and anyone who read the whole thread knows about it at this point...

[cfmfocus2]

Originally Posted by dimm

Just hope this product isn't crap mild steel. If it is then it isn't worth the price. The only thing IMO that is worth the price in that case would be the magnaflow cat. That is not a cheap choice in product.
.

It is stainless steel. The high flow cat pipe has our limited 1 year warranty.

[Smurf]

wow guys. Mountain out of a mole hill.

[dimm]

Now with brutally honest opinion Version 3.2 ....check your sig....thats what happens when you use version 3.2.

Great...stainless steel. Thank you for not following FC poor choice in material.

It's a great addition guys.

[jr_psychologist]

Originally Posted by Fordson

Wait a minute, now - CFM started this thread on 5/13, and by 5/15 less than two days later I had pointed out that the torque and hp curves looked like the car had a tune on it, and later that same day, CFM confirmed that it was the std. SCT tune. This was back on page one of the thread...so I'm not sure that he's tried to snow anyone, and anyone who read the whole thread knows about it at this point...

I agree, CFM clearly wasn't trying to snow anybody. I just agreed with dimm that it should have mentioned in the first post that it had a tune.

Everybody needs to just watch the vid, listen to the glorious sound, look at dyno-proven gains against the standard exhaust that are comparable to an ORP and buy this cat for a great price. Just as soon as they're back in stock.

[Dr_Adam]

Any updates on when these will be shipped out.

[oskarSVTee]

Originally Posted by Dr_Adam

Any updates on when these will be shipped out.

I just started a new thread in the CFM forum questioning availibility on the SVT Cat so you might watch there also for an answer.

BTW, I ordered mine a little over a month ago so hopefully it will be soon.

Ron

[turbovation]

CFM, is this high flow cat California emissions legal?

[jr_psychologist]

Originally Posted by turbovation

CFM, is this high flow cat California emissions legal?

No it isn't. Non-OEM cats aren't CA legal for OBDII cars at this point in time, unfortunately.

[turbovation]

Thanks for clarifying jr. psychologist. How will the people smogging my car be able to tell? Obviously they could look under the car and bust me, but don't they usually just hook it up and run it? Would it pass smog ceterus paribus?

[jr_psychologist]

Originally Posted by turbovation

Thanks for clarifying jr. psychologist. How will the people smogging my car be able to tell? Obviously they could look under the car and bust me, but don't they usually just hook it up and run it? Would it pass smog ceterus paribus?

Only one way to find out, but if it gets caught you could get

[LaidToRest]

I'm only seeing 1.XX hp gained from the stock cat or am I reading the sheet wrong?

[jr_psychologist]

Originally Posted by LaidToRest

I'm only seeing 1.XX hp gained from the stock cat or am I reading the sheet wrong?

Peak numbers, that's correct. However, look at what's happening between 3500 and 4200 rpms. 10 lb/ft of torque at the wheels at ~3800 rpm makes a big difference in how the car feels - especially around town

[LaidToRest]

Originally Posted by jr_psychologist

Peak numbers, that's correct. However, look at what's happening between 3500 and 4200 rpms. 10 lb/ft of torque at the wheels at ~3800 rpm makes a big difference in how the car feels - especially around town

I see, thank you.

[WuNgUn]

Those gains in the lower/midrange are totally from a tune, and nothing but a tune!!
A hi-flow cat should make improvements to the top-end of the rev range, when, coincidently, there is a hi-flow of exhaust gasses...
I'm just not seeing that...
If it muffles the sound (like the stock cat) I'm sure it's also stifling flow...
ORP...FTW!!!!
lol

[cfmfocus2]

The tune did not change between the dynos.