LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Dyno #'s with XE 224/236...anyone??

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Old Sep 3, 2003 | 04:25 PM
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Z97LT1's Avatar
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Dyno #'s with XE 224/236...anyone??

I am considering one of these cams...the one with .536/.555 lift, 114 LSA. Anyone got dyno #'s with stock heads, and this cam? Track times, trap speeds?
I currently have pretty much all of the bolt ons and headers, just trying to get an idea of what I could expect.

Also, what are everyone's thoughts on a 224/236 on a 112 LSA, with stock heads? Any #'s with that?
TIA
Old Sep 3, 2003 | 04:50 PM
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Me too. Im may be doing a rebuild this spring so i might as well do the cam at the same time.
Old Sep 3, 2003 | 05:23 PM
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do stock lt4 heads count? probably not but 368 rw on a 383 bottom end. I know it's not exactly what your looking for, but the best i can do. i think that cam on a 112 would have a lot of overlap. R u planning a blower in the future or spray?

-brent
Old Sep 3, 2003 | 07:05 PM
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That was the first cam I ever had, only it was on a 112lsa. I dyno'd 345/350 w/ stock heads.

Best ET was a 12.3@114mph <- this was in "ideal" conditions. Summer ET's were 12.5's@111.
Old Sep 3, 2003 | 07:18 PM
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Shawn, how was the streetability and idle with the 112? I am assuming you had a decent tune on it. Any likes/dislikes? What headers were you using? What gear was in the car? I have MAC shorties and O/R pipe, and am wondering how much they will work against me, if at all...
Old Sep 3, 2003 | 07:30 PM
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Back then I was using hooker shorties ~ from a '93 model, made swapping an ory and hi-flow cat pretty easy...

The idle was pretty lopey, and drove really good actually. Heck, I just used a HPP+ to raise my rev limiter and shifted at 6200 rpms. Ran on stock 3.42's for a while and it drove fine. Later I upgraded to a KTRE 12 bolt w/ 3.73's and it really didn't seem to drive that much different.
Old Sep 3, 2003 | 07:35 PM
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So Shawn, let me get this straight...you are telling me you trapped 114 mph with hooker shorties and this cam?? Without much of a tune at all? Dizam, I think my mind may be made up.
Also, did you get lots of surge with this cam, or was it a tolerable level?

The only thing that is making me shy from a 112 LSA is the driveability thing. If someone tells me that it isnt that much of an issue, however, I may go with it...your numbers sound really good.

Last edited by Z97LT1; Sep 3, 2003 at 07:43 PM.
Old Sep 3, 2003 | 07:48 PM
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Originally posted by Shawn 97 Z28 M6
That was the first cam I ever had, only it was on a 112lsa. I dyno'd 345/350 w/ stock heads.

Best ET was a 12.3@114mph <- this was in "ideal" conditions. Summer ET's were 12.5's@111.
Could you post your dyno sheets with correction factor please?
Old Sep 3, 2003 | 07:56 PM
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I ran that ET w/ temps in the 50's.. And our DA in early spring is alwas negative <- great for running new bests..

111mph is cake though.. I ran that in Memphis for the F-Body.org GTG in june of 2000.


Sorry, no dyno sheets. It's antique paper. lol
Old Sep 3, 2003 | 07:59 PM
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you never answered me bud. I know i gave you worthless info but i had a serious question in there too. No spray or boost? your just going for a NA with large exhaust bias like the zz3 and crane powermaxx cams? no emmisions?
Old Sep 3, 2003 | 08:53 PM
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Drake I dynoed 448 rwhp with that cam(114) with stock heads . But you know I had a little help. As far as drving I know mine really feels no different than my CC305.

JK
Old Sep 3, 2003 | 09:40 PM
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I get some cam surge with it set with 114 LSA not bad at all though, just when your going 5-20 mph can I really feel it, cause the rpms are low. It seems anything below 1600rpm can get a little rough. ITs not great in bumper to bumper traffic, you must leave a little space between cars, otherwise your just bouncing and surgin going 3-4 mph. I've gotten use to it and know how to avoid it, so its really not a problem. Never dynoed so I can't say, I read a few posts with dynos claiming as high as 380 FWHP and the most I've seen with RWHP is 350. I would expect 108-110 trap speeds on stock heads. I haven't been to the track since my cam, can't wait to see what she's got. Also my cars surging might be due to the fact its on the stock tuning. The idle is very tame, with the slightest of lope to it. It pretty noticable with the cutouts open, but not so much so with them closed. I imagine if you plan on just natural aspired the 112 would work just fine, I myself like great drivability and this thing on 114 is to mild for me, but I need it since I am going forced induction.
Old Sep 3, 2003 | 10:36 PM
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Originally posted by D James
I get some cam surge with it set with 114 LSA not bad at all though, just when your going 5-20 mph can I really feel it, cause the rpms are low. It seems anything below 1600rpm can get a little rough. ITs not great in bumper to bumper traffic, you must leave a little space between cars, otherwise your just bouncing and surgin going 3-4 mph.

Thats what i was getting at with the 'alot of overlap comment' the 383 surges with no load from 1800 down. It'll surge even more on a 112 right?

I've gotten use to it and know how to avoid it, so its really not a problem.

I agree its easily avoided by just pushing in the clutch earlier in those situations. Thats why i went with the CC502 though, because my girlfriend drives my car to work every day and she's not as interested in the maybe 5 pk hp tradeoff for the drivability.

Also my cars surging might be due to the fact its on the stock tuning.
I don't know how much of that you are gonna be able to get rid of.

The idle is very tame, with the slightest of lope to it. It pretty noticable with the cutouts open, but not so much so with them closed.

I agree there is less lope with the borla closed, but it still chops. The video (exhaust) clips on my webpage that say 383 in the filename are all with that cam if you want to hear it. I will have to doulbe check the LSA for you late tonight when i can get the camcard. It should sound pretty darn similar in a 350.

Old Sep 3, 2003 | 11:08 PM
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Well, I probably will end up spraying the car later this fall, but I am more concerned with making good power N/A than with spray. I will gladly give up 10 rwhp on the spray for another 5-10 on motor. Unless a 112 LSA is a big no-no on spray for other reasons (or the power loss on spray is rather dramatic relative to a 114 LSA), I would like to go with a 112 for more power N/A. Any opinions on this matter? Anyone run a 112 LSA on this cam (or a similar grind) with spray?
I am more concerned with trying to hit 112-114 mph N/A than with running great numbers on spray. Any opinions/experiences??
TIA guys

Last edited by Z97LT1; Sep 3, 2003 at 11:13 PM.
Old Sep 3, 2003 | 11:33 PM
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112lsa on spray ~ 62/35 pills.. Ran a few 11.2's... And the hp/tq curve was very nice. It looked like a strong N/A motor.. no monster torque spike.



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