BWW

iTrader: (2)

Here are the comp cams I am loking at.

XR269HR 218/224 .495/.503 with 112 lsa

264HR-12 264/274 .480/.480 with 112 lsa

Its for an 88 350 tpi in my GTA
here are my mods-

ram air system +air foil
headers/ no cat
completly upgraded ignition
custom PROM
built 700r4 w 2200 stall
lightweight flexplate
3.27 rear (unmodified)
AFPR
synthetic oil, trans, and rear fluid
lightened by almost 200 lbs
access to slicks
will port the plenum, runners and heads if neccessary

I am wondering, with the proper springs, would i be able to use any of these cams and if so, could I see high 12?

Or am I way off here?

JakeJr

Is the engine a 350?

The XR is the better profile; you'll probably need springs spec'd for it.

Jake

Black363IROCZ

you'll need to get better heads if you want to see 12s

11sORbust

I think it's possible, especially with the weight reduction and such. I would suggest a zzx or zz9 cam( I think thats right names). 12.9 is not so hard with a 350....

TPIMarow6.6

im looking for the same thing as BWW but i need a (TPI)non roller cam....any suggestions?

D's89IROCZ

I am looking for the same thing too BMW ..... 12's .....but with stock heads ...and a LTR setup ( albeit aftermarket ) .


that first cam looks kinda like a hotcam ........

11sORbust

hot cam will get you in the 12's. I tuned a chip for a ltr engine that runs high 12's. He has a hot cam with 1:5 rockers(DONT ASK). I would suggest getting a crower camshaft.

TPIMarow6.6

any suggestions for me? it has to be for the TPI but i dont want a roller cam(too pricey) plus id have to buy the roller lifters. i want something close to 500 lift.

11sORbust

go check out crower's web site, They have efi cams that match desired performance levels. I'm all about crower. You should get the matching springs and lifters for your cam.

TPIMarow6.6

what is there website? www.Crower.com ?

BlackcamaroIROC

if you use a flat tappet in a roller block you'll need lengthened pushrods (85-down Camaro). I don't know why you'd go flat tappet though unless you've already got it, you lose a few HP and lobes and lifters wear down considerably quicker than with a roller cam, especially if you are racing.

TPIMarow6.6

because im using a 73 400 and i dont want to pay 500+ for cam lifters and pushrods. and my car is a LG4 305 so that doesnt have a roller cam either. so either way i have nothing to start off with. and hydralic flat tappet cams dont wear down as fast as you think they do.

BlackcamaroIROC

it's not so much the cam that wears as is the lifters, in comparison to a roller, people who race hard often change their lifters out each season if they are running a flat tappet. my friends 81 olds 307 was a flat tappet and his cam might as well have been lobeless when he pulled it out. 180xxx miles, I know a roller would do 350xxx before that happened as if it matters! $500 for cam lifer and pushrods seems a little steep. I bought an NIB ZZ9 cam for $150, new set of roller lifters for $70, and a set of moly steel hardened stock length and diameter pushrods for $30. throw in a set of crane energizer non-self-aligning roller rockers with polylocks for $150 and I'm still $100 short of your estimate! just gotta know where to look

vwdave

He needs retrofit lifters because his block does not have provisions for them.

11sORbust

http://www.crower.com/misc/cam_spec/...00231&x=32&y=3 You might even want to go a step higher if your using that 400.

TPIMarow6.6

what are the specs on the ZZ9 cam and where did you get your lifters? ill be running aftermarket heads so will i need to change the springs still or use the ones in the heads? do i need roller rockers? also do i need "roller" push rods or will stocktype ones work? im not too familiar on the roller setups. the zz9 cam is a roller? and you bought one for 150?? i thought most rollers were 250 plus? ahhh....im lost....lol

11sORbust

the cam is a flat tappet, it should use stock lenth pushrods. You should always buy the matching valvesprings for your cam...forget the zz9, check out the link ....

BlackcamaroIROC

ZZ9 cam is a hydraulic roller, I have friends who are constantly buying and selling **** so I scored it on a good deal which is what you should look for. my mate got himself a cc305 and sold me the ZZ9 for a deal. with the heads, remember there is no such thing as too much head for a 350 or larger motor. the only difference I can think of between a "roller" pushrod and a flat tappet is length. remember 11sorbust stock length for a flat tappet is longer than stock length for a roller. if you use a roller cam, I'd get matching pusrods (one piece hardened) so that your rocker arm geometry isnt thrown off. you want the tip of the rocker to always stay on the valve stem. ZZ9 works great with modified TPI which is why I chose it, I think it's better than the hot cam and has a nice lope and powerband that works with the TPI. currently the TPI and cam are holding me back from a 500 HP EFI build, I plan on doing a solid roller stealth ram in the summer when I've got another grand to blow on the car lol

TPIMarow6.6

so where can i get this ZZ9 cam? is there any kind of part #'s i should look for or anything for the complete set? pushrods, roller lifters, roller cam, do i need roller rockers? also i think the springs in the aftermarket heads should work....right? anyway could i get a whole "kit" for my car??

JakeJr

If you plan to buy the ZZ9 new from TPIS - who are the ones that sell it new - look to dig deeply into your pocket. It's expensive, more so than comparable offerings from CompCams and Crane, etc.

In addition, I had mine checked on a computerized camshaft checker at Dennis Wells Racing and found that it was almost 4 degrees off @.050 from the advertised duration. It is advertised as 212 @.050 and mine checked 208.x.

I don't know if this is a chronic problem or just my individual camshaft. Whoever grinds them for TPIS may have quality control problems.

It is a great profile though and seems to always perform a tad better than other similiar duration profiles from other companies. The mags always rave about it.

I sold mine earlier this year for $100, but I kept the lifters to use on my new cam. I needed more duration when I went with a larger CI engine.

I see them for sale, used, many times on the CorvetteForum.

Go to http://forums.corvetteforum.com\zeromain and log onto the C4 Parts for Sale board. There are LPE 211s and 219s for sale there too, from time to time.

Hope this helps.

Jake

TPIMarow6.6

hmm so if i got a used zz9 cam w/ lifters and pushrods that would probably be pretty good? if anyone is reading this and has this stuff for sale let me know. i dont have all the money right now cause im going to buy some heads, so in like 2 weeks id have the money but drop me a line if you have anything like it.....thanks jake

BlackcamaroIROC

it is a great cam, but only buy it if you can get it for a good deal. I don't know about those quality control issues, but they ARE $375 new from TPIS. you can get better cams from summit for less. cc305 is another great late model cam.

TPIMarow6.6

i dont know the "codes" for the cams that well so you guys are gonna have to tell me specs....otherwise i dont know. plus i dont want to spend more than 200 bucks for a came thats why i say i want to go with a non roller, but if someones got a used one... that that would be fine.

BlackcamaroIROC

220 / 230, .510 / .510 114 LSA are the specs
I think its duration is at .050", not seat to seat. it's a roller cam, Lt1 cam to be precise. there is no difference between an Lt1 and a gen 1 cam. just need to have that little late model spacer that 87-92 motors have.

TPIMarow6.6

lol see i know nothing of that. lol im used to the older motors....those are nice specs tho, i like that one. where can i snap one of those up?

BlackcamaroIROC

www.thunderracing.com
look for 93-97 LT1 parts. go to camshafts. it's a comp cams grind "305", hence cc305. if you have an 87-up block the head of the cam is shortened and a little plate bolts on to help prevent cam walk. you'll need an 87-up cam gear (just get a timing set really) to do make it work cause the bolt locations are further inward. it's really hard to explain without a picture.

TPIMarow6.6

so you mean......either get the plate and a pre-87 timing set, or just a 87-up timing set?

BlackcamaroIROC

lol, no, if you've got an 87-up block, the block should be drilled for the plate that you can use with an 87-up timing set. if it's an older block I don't think you can use an 87-up cam in it.

TPIMarow6.6

oh i c, i dont know then.....no clue

TPIMarow6.6

hmm how about this cam and lifter set..... Cranes Emissions legal cams.....
216/228 dur. 454/480 lift . i know the lift isnt very high but if i put on a set of 1.6 rockers it would be .488/.512 from what summit told me. 155 for the cam and lifters 65 for summit 1.6 stamped rockers. nothing special but i bet it would get the job done.
^ that cam, edelbrock RPM heads ported intake w/ aftermarket runners 24# injectors AFPR 9.5-10.:1 cr 4:11 gears posi w/slicks.....12s???