Season 2 Episode 9 Online – Exhaust Comparo
Exhaust systems are one of the first modifications people make with their cars and as such there is great variation in options available and just as many opinions of which is best. With this in mind we bring you a test of several of HPF’s more popular exhaust combinations back to back on a 6.2l LS3 powered VE HSV.
This is the first time Horsepower Factory have done a back to back comparison like this and the results were definitely surprising. Plus, with Rob running through the exhaust systems and the variations in components there is plenty of tech content for those with a thirst for knowledge!
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C31 Melbourne
QCTV Brisbane
C31 Adelaide
A Very informative well constructed video from you guys, well done cheers Ian.
this is the best tv series i think ive ever seen, excellent work boys
Great episode
Any chance on there being a comparison one day regarding X, H pipes, kiss pipes and no merg (true dual exhaust) after the cats?
keep up the good work!
It would be great to compare but may be outside the scope of what HPF typically do. We’ll keep it in mind though, thanks.
Another excellent episode. When you overlayed the Dyno
sheets between runs with the different exhausts; were they aligned
for the same rev ranges? ie to show same torque curves or were the
4-1 headers developing the power higher in the rev range?
Thanks
Sorry for the delay, I think this got stuck in the spam filter for some reason. There was actually no noticeable difference in the torque curve with the 4-1s. In fact the large pipes gained everywhere.
The tri y 4-1 argument has gone on for many years. Would a tri y system with 1 and 7/8 primaries have fared any different? I certainly would not change my tri y system on my ve ss to 4-1 based on your tests.
Its hard to say without testing it directly. A large amount of the gain with the 1 7/8 4-1 is probably not so much due to the pipe diameter but rather the different, high quality and well designed collectors which allows for greater scavenging effect than the other sets.
I have been thinking of putting a full KPM 3 inch system on my E3 Clubsport, do you think It would be better based on your tests to pay the extra and go 1 7/8 headers, have you heard or dealt with this system in person, if so what do you think of it ?
I have only heard the sound of the KPM on the net so far.
Your Video’s are excellent.
Thanks in advance
Hi Bruce,
We have not dealt with the KPM system as we do our own exhaust system for VE and VT-VZ so I cannot make judgement on it. I might be worth your while to take a listen to our system as I think it’s the best I’ve heard (I may be biased though…). 1-7/8 headers are a great choice, I am unable to provide data in comparison to 1-3/4” headers on a standard LS3 but I would doubt there would be any down side, I would definitely option 1-7/8 headers if you’re looking to do engine work or perhaps add a supercharger to the vehicle.
Matt – HPF
I noticed you guys fit these exhaust’s without an ecu tune which i was told i needed to do if i wanted to put extractors on my VE SS, i currently run a twin 3inch system from the factory cats back would love too fit 1-7/8 extractors.
fantastic show will be watching frequently