Of course lift matters...Quote:
Originally Posted by matt5112
And most lobes to choose from are better/more aggressive than the lobes that the xp is ground on ;)
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Of course lift matters...Quote:
Originally Posted by matt5112
And most lobes to choose from are better/more aggressive than the lobes that the xp is ground on ;)
lift doesnt matter as much as you think. hense why an XPZ is fairly low lift for an aggressive cam.
Lift doesn't matter and 85% of the people on this board run modded 1.9 rockers for hp gains with the only change being lift.Quote:
Originally Posted by Bio248
looooooooolrite. doesnt affect ramp rates at all right?
lift would matter if our heads flowed well at these higher lift levels but they don't. even ported.
It's a comprehensive design that includes more aggressive lobes and more lift... You can say whatever you want but lift around .570 is better than lift of .520.
Why?
Do you really plan on spinning much past 6000 RPM?
even then, gains are very small.
And the specs you suggested mean nothing without the valve timing.
I already spin my little XP to 6300-6400.
I thought more lift was important so that you could compensate for lack of good cyl. Heads? Then why do people make gains on rockers as much as they do? Obviously there's other factors in play for gains in rocker upgrades but the main benefit in theory should be lift.
didn't read entire thread but that is a kb blower on thereQuote:
Originally Posted by redlinepontiac
That would be the blower work done that this thread is about. Its a Stiegemeier Snakebite blower, fully ported with an overdrive gear system in the snout giving you the same results as dropping to a smaller pulley without actually dropping pulleys.
Willing to put some $ on that?Quote:
Originally Posted by Sandman
It's a kenne bell 2.2 blowzilla, old style w/the catch can
He's referring to the work done on the snout of said kb blower.
I don't know if that Cobra has a Snake Bite or a KB but the SB does have that kinda whine/scream.
Lift is'nt the only factor with cams. Lets talk duration, lobe separation and ramp profiles. This is a huge topic and I'm not sure many here have a full grasp on cam dynamics related to cylinder head flow. I'll be the first to say I'm no expert.
Everybody wants to see huge #'s when it comes to cams (thats why cam companies advertise full lobe lift instead of at .050") and cylinder heads that flow 400+ cfm at .700 lift. One thing I love about supercharged cars is the low end torque. Cams, ported this and that, headers etc. all kill low end torque for high end hp. Gearing (final drive) can crutch the difference. I want to retain some of that low end grunt and the Snake Bite plus Bob's blower porting delivers that in spades.
Edit: a camshaft cannot make a cylinder head port flow any better. It will only move so much air. To properly choose a cam you need to know the flow #'s of the head at different lift's (.100, .200,.300 off the seat) for intake and exhaust, compression, boost, wieght of the car, converter size and I'm sure there's more.
All you can do with an off the shelf cam is get close IMO, they are ground with 99% of users in mind with typical mods.
No, the cobra in that video has the old 2.2 KB. It's an old video, IIRC it was first posted in 05 or 06. I could post the full mod list on this car at the time of the video, but that doesn't really matter. I don't believe the guys at steigmeier started doing the snakebite blowers until 09...but I could be wrong on that.
I think redline just posted that video because it's the first video that comes up when you search snakebite blower. Here are some actual Snakebite cars I found.
http://www.youtube.com/watch?v=HcMraqAZSvo&feature=player_embedded
http://www.youtube.com/watch?v=Ip5AQ8fDP3g&feature=player_embedded
http://www.youtube.com/watch?v=bv4yXaXWb7U&feature=player_embedded
If these were posted earlier in this thread my bad lulz.
no thanks mang,
im no mustang pro, the interwebz lied to me...
The car in the dyno vid is Stiege's shop Cobra. It recently put down 574/575 with 17lbs and it's "factory" M112. Rest of mods are LTs, Mac pro chamber, Basani cat back, 4 lb lower, Snake Bite, killer chiller, Venom Cooler, Dragon TB and PL and CAI. His shop GT500 with the M122 puts out over 650 rwhp. That's more than the 13 GT500 :th_king-normal:.
that is cool
i want for the police merc's 4.6L PI engien i am building for it
I know he's done some Marauders with top swaps that have pushed over 500 rwhp. One guy that had one was an older gentleman lawyer and his had the works and drag radials. The guy was prolly pushing 60 and did'nt look the type to be wheeling such a bad ass Merc. It was a 10 second piece and I believe it was on Pass Time.
A good friend of mine used to be an AA class machinist. I'll leave it at he can do some crazy sh*t. He told me about the drilled rotors a while ago when I was discussing blower choices. He says they warp cause the material is of course thinner from drilling it out and they do lock up. When having them drilled they need to be rebalanced perfectly or they'll cause more stress to the bearings. He said they probably last about a 1/3 the time a normal blower would last. I would be interested in drilling the rotors also as when I finally get my build done, I'll be running the M112 (already have 2 of them), but last thing I want to see is for them to lock up. I'd like to see some of that extra weight to go away, but I'll be running the car daily as do a lot of members here. The snakebite also sounds good, but it looks like a good way of splitting the case by removing the rubber coupling (nowhere to give way). I haven't seen a blower specifically split the case from this design, but it's about the same concept as gears in an automatic transmission splitting the case like in my Honda. I'm interested to see a mod list from that GTO. She looks pretty.Quote:
Originally Posted by alkygto
Again, 6-71 rotors and many others are drilled. 1/3 the time a normal blower would last? Does that mean I'd only get 40K miles out of it? Bob has a test car with the 50% overdriven SB blower and drilled rotors aproaching 20K test miles. These include track time and dyno pulls so it's not babied. NO problems so I'm not worried in the least. Plus the M90 rotors are shorter than the M112 so I'd think they'd be more "stabil" lol. Interested in your M112 swap, looks like you might be contemplating a lightning case? That would make for an interesting TB location I would think. I have an idea on how that could work, how were you planning on doing it?Quote:
Originally Posted by RegalGS98s
Some GTO specs-
434 cu in BB Chevy 9.5-1 comp, 671 Wieand supercharger, 2-850 center squirter Holleys, Bo Laws belt drive fuel pump, Dart Pro 1 heads ported by Stiegemeier, Hooker 2 1/8 headers, custom grind Lunati cam, Tremec 5 speed, Strange 12 bolt 4:11's w/lightwieght billet spool, 4 wdb w/Wilwood MC. Full factory interior including factory bench seat (rare for a GTO).
So......back to camshafts?