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LLSR L99 how high RPMs?

Old 05-29-2015, 01:29 AM
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Default LLSR L99 how high RPMs?

I'm getting ready to order most of my LLSR setup stuff on a stock bottomend L99. With my current setup I'm spinning it to 7250ish and crassing the 1/4 near 7350. Anyone know if it wiuld hold if I try to hit 75/7600? The cam was going to be a .680 lift but I'm thinking over .700, any idea or tips would be appreciated thanks.
Old 05-29-2015, 08:16 AM
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Talk to Whomever is doing the cam as the duration will dictate RPM ware you Redline.
Old 05-29-2015, 08:23 AM
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Also stay under 700. lift springs get really pricey on LS3 heads, small spring pockets. Trust me! And if the heads aren't ported they STALL around 640-650 lift no need for lift past that with stock heads.
Old 05-29-2015, 09:00 AM
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Ok cool, I'm running BES heads ported and milled 0.040
Old 05-29-2015, 09:23 AM
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With solid roller, you can spin it to the moon, of course in conjunction with good valve train. But why spin it that high if your heads can only make power to a certain point?Cylinder heads dictates your HP.
Old 05-30-2015, 01:01 AM
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Originally Posted by BOLO
With solid roller, you can spin it to the moon, of course in conjunction with good valve train. But why spin it that high if your heads can only make power to a certain point?Cylinder heads dictates your HP.
The cam I have on the way keeps making power up to 7400 and with the new vararam intake manifold I was wondering 7600 or so
Old 05-30-2015, 07:29 PM
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Kip specced a LLSR for me @ 243*/249* .670"/.640" 115* +3*
Goal Peak HP ~7000-7200 RPM, Shift 7500+ RPM with 8000 RPM
REDLINE.
Waiting on VARARAM INTAKE from Patrick also, any news?
MAMOFIED TFS LS3 Heads, Big Bore (4.175"), Stock Stroke, Long Rod
11.75:1 Compression.
I kept the lift below .700 because my heads stall at or just above
.700 and also for lower spring pressure and reliability.
Old 05-30-2015, 08:37 PM
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Same here, I gave Kip the specific heads and intake that I will be running and he specced a custom LLSR cam for my intended application. The correct valve springs as well.
Old 05-31-2015, 01:18 AM
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Originally Posted by NAVYBLUE210
Kip specced a LLSR for me @ 243*/249* .670"/.640" 115* +3*
Goal Peak HP ~7000-7200 RPM, Shift 7500+ RPM with 8000 RPM
REDLINE.
Waiting on VARARAM INTAKE from Patrick also, any news?
MAMOFIED TFS LS3 Heads, Big Bore (4.175"), Stock Stroke, Long Rod
11.75:1 Compression.
I kept the lift below .700 because my heads stall at or just above
.700 and also for lower spring pressure and reliability.
Originally Posted by BOLO
Same here, I gave Kip the specific heads and intake that I will be running and he specced a custom LLSR cam for my intended application. The correct valve springs as well.
Kip and Rhino79 both worked on this grind thats coming max lift is .670 which is also a VVT grind. Can't run anything bigger which I was thinking of going over .700 but I guess I'll hold off. I am also waiting on the new VRX intake, so having my redlne at 78/7900 and shifting @ 7500 I'd be ok?

EDIT: My C.R. is 11.4:1 and will be running on E85 if that even matters.
Old 05-31-2015, 06:32 AM
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I think it will be fine, ballpark wise. Until you strap it on the dyno and seeing where you make power and torque, only then you can determine where to shift for best results.
Old 05-31-2015, 12:45 PM
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Don't know about how VVT affects REDLINE, but Kip told me for my build
8000 RPM is not an issue at all for his LLSR.
If I was using E85 I Would be using at least 12.75:1 compression
to take better advantage of the Anti Knock/Detonation
properties of the fuel.
Old 05-31-2015, 02:46 PM
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What intake is on your setup ?
Old 05-31-2015, 04:59 PM
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Any details on the Vararam intake manifold?
Old 06-01-2015, 12:35 AM
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Originally Posted by Tuskyz28
What intake is on your setup ?
I run a Rick Crawford modded intake
Old 06-01-2015, 02:38 AM
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Can you post a picture of the Crawford modified intake?

who has tested the Vararam intakes to confirm they make power above 7500rpm?
Old 06-14-2015, 07:44 PM
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62Nalide you're changing your GPI SS3 cam out?
Old 06-14-2015, 10:44 PM
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Originally Posted by NAVYBLUE210
Kip specced a LLSR for me @ 243*/249* .670"/.640" 115* +3*
Goal Peak HP ~7000-7200 RPM, Shift 7500+ RPM with 8000 RPM
REDLINE.
Waiting on VARARAM INTAKE from Patrick also, any news?
MAMOFIED TFS LS3 Heads, Big Bore (4.175"), Stock Stroke, Long Rod
11.75:1 Compression.
I kept the lift below .700 because my heads stall at or just above
.700 and also for lower spring pressure and reliability.
What size motor is the cam going in? Kip specified for my LS3 based 427 a cam with 246/252 @ .050". Lift .673"/.655" with a LSA of 115 +s. Hot lash is .010"/.010". I want the motor to shift by 6800 and I have a 6L80 transmission with a Yank 3200 converter.
Old 06-15-2015, 12:10 PM
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Right now optimal shift points for me are right around 6800. That's right around where my power starts to plateau. I definitely need to figure out something intake wise. While doing some logging, I'm seeing around 95kpa at 4200 and up. There is some variance there, but the stock intake can't keep up right now.
Old 06-15-2015, 12:42 PM
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You guys running shaft roller rockers? Asking for trouble with stock units with that lift.
Old 06-15-2015, 01:34 PM
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T&D adjustable shaft rockers in my case. I know others are running the Jessels.

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