Ok, I'll go out a limb and disagree here. No, the short tubes don't add peak hp. What they do, from all the articles I've read about them in S197s, is move the power curve into the lower rpm range. Basically you'll gain mid-range hp from shorties and top end hp from LTs on the S197. Which is why everyone says they're worthless, because you don't see a peak hp increase which is what everyone quotes from dyno sessions. (The cars tested already had a CAI and tune, as well as pulleys I believe, so not sure if yours is stock). I'll look at a set of these eventually because I want to increase actual performance on the street and am not worried about winning a numbers game on the dyno or getting the best peak hp for high rpm situations at the track.
I disagree because of how exhaust functions. The whole reason why you get more HP, by changing headers is scavenging. LT's scavenge FAAAAAAAARRR more then shorties. As for "articles" in magazines remember those performance parts manufacturers pay thousands of dollars a year to advertise in those rags, articles are written "creatively".
Agreed that shorties don't add much (if anything) for top end power.
How much hp / torque (HP/torque curves vs. RPM) do the long tubes typically add (NA and SC) on a 3Valve application?
Which sets have the D shaped port that match the 3V heads?
Do they require special cats?
Do they require special O2 harnesses?
Which brands are the best for long tubes?
Long Tube guys ... Where are the numbers? ... all this talk and no graphs?
I'm serously thinking about a set of long tubes, but would like to see some numbers before I go to the expense and effort of the switch.
The only graph I have is my smile the 1st time I floored the gas and the car pulled hard like a whipped mule from 3k to 6.5K RPM<-- Kinda like that one.
The only graph I have is my smile the 1st time I floored the gas and the car pulled hard like a whipped mule from 3k to 6.5K RPM<-- Kinda like that one.
Is there any performance difference between tuned length like the BBK or JBA over the Ford Racing or Pypes? Those two don't look much better than stock manifolds. I would think that the others would help a bit more. I know that nothing is going to perform like LT's but they aren't an option for everyone. California emissions testing sucks.
Since you have to run a tune with headers it's almost impossible to get an honest dyno test out of any company that makes them. I think the closest I have seen is the JBA. They say what was on the car for the baseline. If you can believe the tests they seem to be alright.
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