Jason M 91Z

Well, heres my new combo, and some ideas I have for cams:

New ZZ4 Shortblock, Trick Flow 23* CNC heads w/ 64 cc chambers (about 9.4:1). Superram plenum/runners and Base, 52mm TB. 91 Speed Density fuel system, Walbro 255 LPH. This is a street engine.

I'm looking for about 218* intake duration @ .05" The LT4 Hot Cam that everyone says is sooooo big, really isn't that big. With 1.5's, it has .492" lift on both sides. 218/228 @ .050. Should be a 2000-6000 rpm motor right? I'm convinced I need a split duration cam because of the less than ideal exhaust constraints even w/ my aftermarket system. (SLP 1 5/8", Catco 3" HF, Edelbrock catback). Another perk of the LT4 cam is its 112* LSA, a little more desireable than comp and cranes 110 LSA for a street car. Any ideas, tips, or concerns are as always much appreciated! TIA everyone.

[EDIT] Ooh, found another one! Comp XR269HR 218/224 @ .050", .495/.503" lift w/ 1.5's. Hmm, nice cam.

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-Jason M. 1991 Camaro Z28

[This message has been edited by Jason M 91Z (edited July 07, 2001).]

Jason M 91Z

up top.

dhirocz

iTrader: (2)

Hmm, good luck, man. I was looking into that myself, but can't afford a SR right now. Keep in mind the design of the SR is supposed to sustain or improve low-end and significantly increase top-end. Cross between a LTR and Miniram setup, in function. Look for a cam that'll give power in the 1500-5500 range. It'll feel better on the street, and how often will you see 6000 anyway? (unless you're me). I would think the LT4 hotcam would be fine, so would the XR269HR. But from what I've heard, TPI engines like 112-116 LSA, more for SC engines. If I could find a cam like the XR269HR with a 114 LSA, I would be REAL happy!!!

Between the two, use the LT4 Hot Cam. I was gonna but I want to use a SC in the future. I haven't heard any complaints, except from people who expect it to preform with a factory TPI setup.(?)

MikeH

iTrader: (10)

Jason, I know alot of guys like to use the Accel 219 cam for that application. IM using the 213 it has 224/234* of duration. Its a flat tappet cam, with less lift then the 219. It was designed for 383/406 engines using the SuperRam intake.

If you dont find what you need to know here. Do a search on the corvette forum. Those guys really like the SuperRam. You should find some good info there.

Also go to http://www.lingenfelter.com/

Good luck!

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Black 90 IROC, L98, A4, 323 gear. SuperRamed 406 in the works!

[This message has been edited by MikeH (edited July 07, 2001).]

Jason M 91Z

dh,

Yeah I don't plan on hitting the revs very often, but would like them to be there.

I too would like a cam w/ this grind on a 114 LSA, but I'm not too concerned about 112. Some of the Crane's are 110. Thanks for the advice man.

PS. I have the Superram already, but the other stuff is still on paper. I got a deal on the SR that I couldn't pass up.

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-Jason M. 1991 Camaro Z28

Jason M 91Z

Hey Mike!

I can see how the Vette guys would have better luck w/ the 219, due to a better exhaust than the F-cars. I just don't think it has enough on the exhaust side to get all that crap out of there. I'm gonna go look up the LSA on that cam, I'll be pokin around this post don't ya's worry! Thanks for the reply Mike, how's the 406 going?

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-Jason M. 1991 Camaro Z28

Jason M 91Z

Hmm, Lingenfelter cams are all on a 112 C/L, so they must have good luck with them. I'm not convinced the 219 is for me however. It has as much lift w/ 1.5 rockers as the hot cam has w/ 1.6's. I think .525 is a bit much on a basically street engine with longevity as almost as big a concern as performance.

That 269HR is looking better and better by the second! Anybody else?

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-Jason M. 1991 Camaro Z28

MikeH

iTrader: (10)

Thats why I went with the split duration also. That comp cam sounds like a winner for your application. The duration is right where you want it for what you are planning. I bet it will pull to 6000 easy with your setup.

The 406 is still on the stand. IM still waiting on my poly locks from Jegs. I just have to make the time to get the swap done. I cant wait... this thing should be a blast to drive. If the tuning issues dont drive me nuts.

Btw, How did the 1LE brake upgrade go?



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Black 90 IROC, L98, A4, 323 gear. SuperRamed 406 in the works!

[This message has been edited by MikeH (edited July 07, 2001).]

IROCZZ3

Just my 2 cents...

I think a lot of the Vette guys seem to run well with the SR/219 setup because they can hook real well off the line...1.5x-1.6x 60 foots seem common with these guys.

Generally split duration cams are needed for heads that do not have efficient exhaust flow, not so much with the exhaust system itself. The TFS, AFR 190, and ported L98 aluminum heads all have good exhaust flow, with the intake/exhaust ratio around 80%, which is ideal.

With that said, I'd get the LPE 219 cam. It is designed for the SR. I have one waiting to be installed so I'll let you know in a few months how it runs.


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1989 IROC-Z, ZZ3 shortblock with some bolt-ons.
13.20 @ 108.69, 2.2 60'

89gta383

iTrader: (5)

From EA:

ZZ9 cam: 404 hp @ 6000 387 @ 4700

LPE 219: 414 hp @ 6000 392 @ 5000

LT4 HOT: 411 hp @ 6000 390 @ 5000

ZZ3 383 hp @ 5500 381 @ 4500

CC XR270 395 hp @ 5500 390 @ 4500

Good luck.

BuckeyeROC

JASON, I would recommend the LPE 219. Those numbers up above make me feel good, I have had the SuperRam, LPE 219, and some AFR 190's on order since Monday. I decided on the LPE 219 cam b/c Lingenfelter designed the SR and he should know best what cam works well with it.

BTW 89gta383, were those number w/ a 350 and what heads were they using?

[This message has been edited by BuckeyeROC (edited July 07, 2001).]

Jason M 91Z

Mike,

1LE upgrade went great! I have Autospecialty Metal-Lux pads and at first it felt like there was a little air in the lines still, but when I brought the car down from 120, it stops unreal. I pulled right over to see how warm they got after several hard stops on the highway, and they were surprisingly cool. I'd reccomend different pads for the street though, these don't bite hard enough when cold.

Thanks for the cam help everyone. I'm still kinda leary about running that much lift on the street. That cam has to be jacked up like a ****. .560" w/ 1.6's? Damn! Thanks again for the thoughts everyone, I have more info to digest now!

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-Jason M. 1991 Camaro Z28

89gta383

iTrader: (5)

Those numbers were a 350 with stock Trick Flow heads.

That .560 lift is not too much for the street, just get titannium retainers and the recommended springs for the cam.

Jason M 91Z

The 219 is $315! Thats sick money just for a cam! If I run that Comp 269 HR w/ 1.6's, my lift will be .528/.536.

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-Jason M. 1991 Camaro Z28

Jason M 91Z

TRAX,

Weren't you running the 269HR for a while?

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-Jason M. 1991 Camaro Z28

BuckeyeROC

Yeah, it's steep, so are the AFR heads, but you get what you pay for, I've been finding that out lately.

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89 IROC 350 TPI, 700R4, 2.77 9-bolt w/ full exhaust, some bolt-ons, and free mods-G-Tech timed 14.8 @ 96 w/ terrible tires...Parts currently being shipped: AFR 190's, SuperRam, LPE 219/219 cam, Vigilante TQ converter, a "beefed up" 3.42 10-bolt, and some Spohn suspension parts

TRAXION

Jason,

I ran the 218/224 CC Xtreme cam with 1.6 rockers to pump the lift up. I like this cam a lot better than the HOT cam because the cam is more aggressive with regard to its ramps. If you run this cam ... make sure you get it on a 112LSA. I custom ordered this cam from IRS before CC had a grind number for the 112. Now they have an official grind number for this cam on a 112LSA. My best time was with this cam ... 12.2@112.5mph with the MiniRam and 30lb injectors. With the stock 22lb injectors and a fully upgraded LTR setup with TPIS Bigmouth and AS&M SSLTRs I went 12.5's@108mph. The LTR setup would have easily gone low 12's at close to 110mph but I didn't want to mess around with it anymore ... I really wanted the MiniRam. I haven't tested my new combo (with the 230/245 cam, 3600 stall, ported AFRs, and HydraRev) at the track yet.

Tim

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TRAXION's 1990 IROC-Z
Best Time = 12.244 @ 112.51mph (1.778 60' / 7.819@88.32mph in the 1/8)
All Natural. No Force. No Drugs. Stock Bottom End. Stock Body Panels.
Gunning for NA 11's with bigger cam, bigger stall, and bigger exhaust.
-=ICON Motorsports=-
Moderator: PROM board at thirdgen.org

Jason M 91Z

Tim,

I thought I recalled you running this cam. Do you pull OK vacuum at idle? I've been reading most posts on the PROM board, and read all the P730 posts. Do you think it'll be difficult for a newbie PROM'er like me to make the VE and spark tables work with my combo? I have a feeling that, like you, I'm gonna be way rich on the lower table. Thanks again everyone for the help, especially Kevin who's gone out of his way to school me on the TFS heads via e-mail!

TRAXION

Jason,

Its been some time since I have run that cam ... but, if I recall correctly, I was running around 55-60kPa at idle with that cam. My new 230/245 pulls only 70-75kPa at idle. I started my PROM adventures with the 218/224 112LSA Xtreme camshaft. It was pretty straight-forward. I think you can handle it. You will be WAY rich in the lower VE table. With the stock chip my BLMs bottomed out at 108 with that cam

Tim

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TRAXION's 1990 IROC-Z
Best Time = 12.244 @ 112.51mph (1.778 60' / 7.819@88.32mph in the 1/8)
All Natural. No Force. No Drugs. Stock Bottom End. Stock Body Panels.
Gunning for NA 11's with bigger cam, bigger stall, and bigger exhaust.
-=ICON Motorsports=-
Moderator: PROM board at thirdgen.org