TPITuned Port Injection discussion and questions. LB9 and L98 tech, porting, tuning, and bolt-on aftermarket products.
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Which cam do you think would be a better cam the ZZ-9 212/226 .483/.520 112 OR Comp Cams XR269HR 218/224 .498/.502 112. I plan on using Edlebrock heads 6085 and modded LTR setup(Edlebrock base, SLP runners, etc.).
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Brandon
"ScreaminDeamin 360"
350 60 over, TRW forged 9.83:1 pistons,Hooker Comp headers, crane cam 216/228 .484/.512, crane 1.6 RR's, ported plenum, home made ram air, 24lb SVO injectors, crane AFPR, all going through 3 inch mandrel pipe and a flowmaster.
New project-89 IROC-305 5spd...Jamex Springs...and thats just about it!Soon- 6 speed, Pro 5.0 shifter and 4.10's http://ScreaminDeamin.cz28.com
I'll second the notion of using the CompCams cam. Another good candidate is the LT4 HOT cam with specs of 218/228 .492/.492 (1.5 rockers) on a 112 LSA.
Rumor has it, the ZZ9 has some quality control problems, and at $375, that really shouldn't be the case. I like the specs on the cam though, but you aren't always too sure what you are getting.
I don't like comp cams. I don't think they have the resources to devote to developing an excellent tpi cam. As you may know, tpi enjoys a 'ram charging' effect due to it's long runners in the mid rpm operating ranges, maybe from 3,000 rpm to 4,000 rpm where it makes peak torque. Logic would indicate that,due to this ram charging effect, there should be some sort of lobe profile change to take adantage of this effect. For more information on this, do a search for Yelofvr or BadSS. Comp Cams has made so many cam grinds for so many different types of cars that I don't think they would have the time to dedicate to designing a single effective ramp profile. I cite project TPI magnum to back up my arguement. What was it, 13.0@ 103. Heads, cam, extrdude honed .... and 103 mph? That really isn't all that good. Now, if you wanted to switch to a short runner set-up instead of the long runner tpi, all bets are off.
SLP the one cam I love for the 350 is the 214/224. SLP, of the famed SLP Firehawk. The only problem I have with SLP was when I called them, and they told me that non of the production cams they have will retrofit into an older block (like my current 350 or 400). When I asked, he couldn't tell me why, he just said that "there was something different with the block." I think the "something different" is the retainer plate and roller lifters, but he wasn't giving up any info. I like the cams, though. I cite a vehicle with a SuperRam and the SLP 224/230 cam in CHP about a year ago.
LPE. Their cars run. I know it, you know it, my dog knows it. I like the 211/219 for a mild 350, but since my intentions are to step up a 400, the 219/219 is more in order. I'd like a split pattern cam, but his cars run the number. When comp cams can build a 600 hp twin turbo C-5 vette, I'll buy their cam.
HOT cam? I don't know. Kevin91Z runs well with his, Jason Aschle runs well with his (mph of 107 and 108 respectively) but it takes a lot of work to get it there. There are a lot of people who don't run very well with the HOT cam. I cite my lobe profile arguement from before. The HOT cam was designed for a short runner intake. Anyone with any information on this last topic, please post it!
And in the low 12's (12.2 at 112 mph to be exact) with the Mini-Ram. He should easily be in the high 11's once he gets his long-tube headers installed now that he has an even-larger CompCams cam installed.
Another good candidate is the LT4 HOT cam with specs of 218/228 .492/.492 (1.5 rockers) on a 112 LSA.
