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VE Drone

PIR4TE

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Haha really!? Not a sponsor!! Need to spread the luurve!
Maybe you just need to register, sorry.
 

PIR4TE

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Here's the gist:
Thread dig, but thought I would follow up on Sureflo. I bought one of their 3" systems for my SSV wagon. Short story, it didn't fit and every join had to be cut and re-worked. They reckon they trial fit every one to a car before shipping out, but this system needed 2" cut out of the length in the middle so I fail to see how it ever fitted. Fair enough it doesn't drone, but for all that effort it is very, very quiet. With their headers, cats and a VCM OTR and tune it makes 382 RWHP, so performance is okay.

Oh, and they fix the drone by using J pipes under the diff, so it sits heaps lower than any other system.
I couldn't help but point out that the hp seems a bit high with no other work, and figured he can mistakenly call helmholtz chamber J-pipes like yanks, although I agree the term is used for headers mainly.
 

Not_An_Abba_Fan

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That's the first negative thing I have heard about their system, although I have heard a very similar story from someone that didn't name the brand.
 

hanson1128

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Mate I like this guy's no BS approach and it appears knows his stuff too, as I mentioned he fits those confounded helmholtz pipes as well!
Sureflo also has a patent on the X-pipe as I understand it, and the videos posted while a bit subtle sound OK (I've no doubt they'd pass the noise tests), next time around I will be speaking to him and NAAF.
Get him to install though, here's what that DIY guy on another forum I mentioned earlier had to say:
(See page 5, 'magnum9')
• View topic - 3" Cat back recommendations
What headers do you have? Hurricane Mild Steel with coating
What cam? Comp Cam 231/247 .617 .624 113 LSA with 2800 stally
Current dyno results? 317rwkw before fitting stall converter

What headers do you have? 1" 7/8, 4 into 1 Hurricane mild steel with coating
What cam? Comp Cam 231/247 .617 .624 113 LSA with 2800 stally
Current dyno results? 317rwkw before fitting stall converter
 

PIR4TE

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Which Hurricanes specifically?
EDIT: sorry I see now, thanks for that.
Any other mods to the engine?
 

PIR4TE

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Do you perhaps know the degreed centerline of the cam?
And what revs produced 317rwkw?
 

hanson1128

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Which Hurricanes specifically?
EDIT: sorry I see now, thanks for that.
Any other mods to the engine?

HI Mate,
Basically nothing much

Cam, Valve Spring kit
GM Genuine coolant
malfless tune
GM Genuine crank bolt
GM Genuine water pump gaskets
GM Genuine front timing cover gaskets
LS7 3 bolt cam gear
ARP cam bolts
Heavy duty pushrods to suit chosen camshaft
VCM OTR intake
Hurricane 1" 7/8 mild steel headers with coating, 100cell stainless cat, 3" mild steel cat back
2800rpm stall converter
25% Underdrive Balancer
Fan Belt to suit Underdrive Balancer
NGK racing series spark plugs..

this cam makes good lumpy idle and acceleration sound awesome, apart that.. only one thing really bother me is drone.. but have already went back to shop and asked them put back the factory rear muffler due to Hurricane rear muffler had really bad drone.. just driving nuts
looking for to get a better cat back now with less drone or to none..
 
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