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Question about HVMC's. How much of a difference do HVMC's make over standard collectors? |
I didn't think that it was really too much of a difference. Just provides a bit more scavenging |
There isn't much of a gain to be had with stock internals, but SouthFl.02.SS posted a ~40rwhp gain with HVMC and a 90/90 on a H/C car. |
Originally Posted by Iron Sights There isn't much of a gain to be had with stock internals, but SouthFl.02.SS posted a ~40rwhp gain with HVMC and a 90/90 on a H/C car. The 90/90 setup alone should net like 25 rwhp, and going from SLP to QTP (especially if it needs bigger headers) could be worth anywhere from 5-15 rwhp. I would guess that the HVMC might be worth 5 rwhp. Just a guess...I can't imagine that they could make a huge difference, or QTP would have dyno results all over this board showing how much better they are. |
Originally Posted by matts22 ...I can't imagine that they could make a huge difference, or QTP would have dyno results all over this board showing how much better they are. |
Originally Posted by TheBlurLS1 ....and Kooks would sell them.... There is a member on here that gained like 8-10hp and even more in tq over his old standdard qtp headers. But its not just about the peak numbers. Because of the increased scavanging you will gain more across the board. |
Originally Posted by Order 66 As matter of fact they have a merge style collector on there corvette headers. As well as LG, Edelbrock and ARH. So i think QTP knew what they where doing 4 years ago and it seems everyone now has a "merge style collector" now. I wonder why?? There is a member on here that gained like 8-10hp and even more in tq over his old standdard qtp headers. But its not just about the peak numbers. Because of the increased scavanging you will gain more across the board. |
Originally Posted by matts22 Yeah but he was replacing SLP 1 3/4 headers with 1 7/8 QTP HVMC if I remember correctly. The 90/90 setup alone should net like 25 rwhp, and going from SLP to QTP (especially if it needs bigger headers) could be worth anywhere from 5-15 rwhp. I would guess that the HVMC might be worth 5 rwhp. Just a guess...I can't imagine that they could make a huge difference, or QTP would have dyno results all over this board showing how much better they are. It was a 35rwhp gain (460-425=35rwhp). Here's the graph (graph didn't reflect 460rwhp pull, nor did it reflect the old 425rwhp pull, but it did reflect the change in the curve well): http://home.att.net/~carlos.ramirez1...2/site1048.jpg |
Originally Posted by SouthFL.02.SS It was a straight up 1 3/4" to 1 3/4" swap. Kooks made my headers ;) Rebadged QTP at the time. No longer the case. It was a 35rwhp gain (460-425=35rwhp). Here's the graph (graph didn't reflect 460rwhp pull, nor did it reflect the old 425rwhp pull, but it did reflect the change in the curve well): http://home.att.net/~carlos.ramirez1...2/site1048.jpg Does the 35 rwhp include the 90/90 setup? Were you going from a LS1 or LS6 intake? Was the old throttle body stock or ported? Is your FAST intake that you have now ported? Thanks for clearing things up! |
Originally Posted by matts22 Thanks man! I was looking for your info and couldn't find it. Does the 35 rwhp include the 90/90 setup? Were you going from a LS1 or LS6 intake? Was the old throttle body stock or ported? Is your FAST intake that you have now ported? Thanks for clearing things up! -35rwhp includes both the 90/90 and the HVMC. -Coming from an LS6 intake with a Jantzer ported TB -90mm FAST intake was unported Cheers. |
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