lncboytre_d

This thread is endless!!!!! Alot of good info; the only bad thing is, there is so much info you will get lost in the pages when this thread is searched in future references. But none the less, Great Info!

Fbodyjunkie06

iTrader: (10)

None what so ever. 10.25:1 static, 7.5:1 dynamic compression.

Fbodyjunkie06

iTrader: (10)

I am all for finding out if you are!!! I'd need to rent a lindy fly cutting tool but for those heads I'd do it in a heart beat!!! I'd be willing to bet it would pick up at least 4-5mph on the current tune-up and with the current tune-up leaned out some more on kill it might do more than that!

I'd keep the turbo set-up on the 99 and do the gangster motor in the 95!!! I think WhiteLTone has gotten his car really light! Lighter than mine at least and that's saying something!

I only know of a couple f-bodies in my area that are as light as mine and Justin Smith's is one, hell his gets 2600 empty I think! Mine was 2780 empty without me in it the other day at the track when I weighed it for the first time and that was with the 15lb bottle.

Fbodyjunkie06

iTrader: (10)

Pictures are needed of this

Fbodyjunkie06

iTrader: (10)

I'm glad I didn't have to do it for you lmao

Fbodyjunkie06

iTrader: (10)

Hey that's the inner post ***** in me coming out

lncboytre_d

By all means, keep posting. I was just stating a fact. I search and read your post religously. You, Carter, Cam, ATV....you guys are awesome! I have learned so much.....mainly corrected things I thought I knew.
If no one else does, I thank you guys.

I am a self proclaimed "lean is mean" club member

suicidal racing

iTrader: (14)

**** 2 yrs ago if i wasnt still trying to run x275 at the time i would of had a bbc instead..i had a line on a nice bowtie tall deck block for 500$,used bryant crank and some other stuff..sears said no tall decks ever in x275 so i passed it up an started getting **** for the lt1 at the time..10 months later tall decks where let in..

you going to run a cam like the one im going to get ground but with 2 degree more dur on the exh side? what lobes you going to use the lsl/rpm..

THADD

iTrader: (12)

Well it looks like my car is ready for the 7th too Martin. I'm glad they are running at night so we can avoid some of the heat. I haven't decided on just tnt or running a class. I guess it depends on my shakedown passes.

Fbodyjunkie06

iTrader: (10)

How about we just race each other!!!

Winner gets a beer bought by the loser?

And I'm freaking stoked about the golf cart too No more walking!!!!!!!!!!

Oh and 28's vs. 275's is on the 14th not 7th this Saturday next saturday along with NDRRA RS275.

Is Smith going to be with us on the 7th tuning your car?

Fbodyjunkie06

iTrader: (10)

Atta boy! Lean is always mean, also know that if you already didn't in the summer time when the DA is high and so is the humidity you will want and need more timing in the tune-up and to lean it out to achieve the same plug reading.

When it cools off and the air is cold or cool and dry you'll want to take some timing out of it and most likely richen it a tad to achieve the same plug reading. I have even heard of guys in the late fall when it's -DA outside pulling their timing back 1-2* on a known tune-up, going up a fuel jet, and also stepping up to a colder plug.

Hotter weather, and higher humidity make for a higher DA so there is effectively less air to be utilized for your motor so you take away fuel jet to lean it out and add timing. The good thing about nitrous is even though your motor will be down on power, the nitrous will always add the same amount of power because it carries it's own oxygen. Your just adding the extra fuel to use it and combust it. The other thing is when the humidity is really high there are a lot more water grains in the air. Those added water grains in a nitrous car are almost like having water injection cooling the combustion charge down and allowing you to add a little timing. Water grains also have an affect on air fuel ratio and will lean out your motor needing the added fuel jet like I spoke of before.

WheelsUp84z

iTrader: (14)

I plan to have the 95 in the 26-2700lb range, its gonna be a while before its race ready, unless i can get a hold of another transmission, and a set of big/littles. i have a th350 core and a stock ls1 with 241's. Might try to throw something budget together with that combo. still needs the whole car wired too. I want to minitub it and cut out all the rear sheetmetal (spare tire well, t-top well, behind gas filler) Also need to add bars through the firewall and around the strut towers so I can cut all that metal away.

Fbodyjunkie06

iTrader: (10)

These are the lobes I am mulling over. I'm going to list all the specs so you can see what I compare them by. Some have more total duration than others while still sharing identical @.050 numbers. Some have different @.050 numbers, but share indentical total numbers and etc.

Here are the intake lobes I am looking at:
Total @.050 .200 lobe lift valve lift
LSL-289 239 162 .367" .624"
LSK-289 239 164 .382" .649
LSK-303 242 164 .371" .631
CM-296 240 161 .372" .632"
XER-289 240 161 .358" .609"

Here are the exhaust lobes I am looking at:
Total@.050 .200 lobe lift valve lift
XtremeRPM-305 252 168 .350" .595"
XtremeRPM-307 254 169 .350" .595"
XtremeRPM-309 256 170 .351" .597"
ExtremeMarine-308 254 171 .380" .646
Cheater HR-307 254 171 .365" .621"
LSL- 301 251 173 .367" .624"
LSL- 305 255 176 .367" .624"
CraneLSHS- 312 256 170.5 .350" .595"

I've been crunching valve event numbers and haven't really still found something that has given me that epiphany moment of clarity yet, but I have come up with 2 or 3 that I think will work great.

As you can see the LSL lobes have the most meat in the middle of the lobe and have the higher valve and lobe lifts as do the LSK lobes. The Extreme RPM lobes although having more total duration and @.050 up top have softer in the middle rates than the LSL and LSK lobes and less lift. The Extreme Marine lobes and Cheater lobe is kind of a mix of both of those with the same total as the Extreme RPM lobes, but has a little more in the middle rate and more lift than the Extreme RPM lobes but less than the LSL's do. You see that one LSK lobe with 242 @ .050 duration is just a beast with more total duration by far than the LSL lobes with 3* less @.050 duration but has the same in the middle area.

I don't want to give anything up on the intake, but the exhaust could stand to be a little bit softer "in the middle" but I'd like more on top since my car is a race car it will be seeing high rpm more than it will "street" rpm's. I really like the Cheater HR lobe on the exhaust lobe.

StrokerTA

way too much exhaust side, imho.

WhiteLTone

iTrader: (18)

Unleashing my car sunday. Hopefully droppin a few lbs last week and the other changes we made at Legend Racing will net for some new bests.

Fbodyjunkie06

iTrader: (10)

EVO too aggressive?

I'm just looking at valve events and how they meet what I know works well.

My heads are **** and they need the duration from what I've been told.

When you say too much exhaust do you mean too much total? Too much @.200 @.050?

I'm sure you know being in the performance side of the racing world that each lobe is not the same even if it has the same total or @.050 numbers.

Fbodyjunkie06

iTrader: (10)

Damn man I missed your post here.

Well if you wanna lend a broke college student some bad *** heads we can see what they will do! I will be glad to perform all labor while you point and tell me do this do that(seriously...)

I've really been wanting to put together a "team" of some sorts. We already have our "group" of LS cars at the track with Me, Thadd, Paul, Ted and Matt. Mine is the slowest of the bunch, but we stick together and help each other out whenever we need it. I've been trying to talk travis(I8urford) in putting his bad *** L92 headed 408 in my car instead of his and selling my trans for a glide and giving RS275 a run for their money.

I'd love a set of heads hell even my 241's ported would be great. It's really the only thing that is holding the car back. The compression is just stupid low. I could probably run 12:1 on pump gas with the dynamic compression this cam creates.

n2ols1cam

Nice!

StrokerTA

Correct, no two lobes have the same valve events. However, cylinder heads being junk or not. Putting a over 300@50 exhaust lobe in the engine I do not think is going to net you the results you hope to find.
Very few of the pro mod engines I build have exhaust sides that extreme, when you try putting that much duration on the exhaust side you run the risk of blowing everything right out the exhaust valve and never creating any cylinder pressure..
I can tell you the cam in Nicks car has no where near that duration, and it runs alright. And has a fairly good cylinder head on it.

Fbodyjunkie06

iTrader: (10)

You mean over 300 at total duration? None of those durations are over 256 @.050.

If you look at the .200 numbers of that 254 cheater lobe it is softer at .200 than my 239 @.050 intake lobe with 254*@.050. It is a very soft lobe with a soft ramp rate.

I agree with blowing it out the cylinder, BUT you have to look at the total spec of the cam.

I just listed lobes I was looking at. When you combine those lobes with the right LSA and ICL the overlap is kept in check and you don't blow it out the cylinder.

Out of the 3-4 cam grinders I have talked to have told me I have the right idea with the specs I am looking at. Each one of them had a different opinion on the exact lobes to use, but all had the same valve events within 2* on each valve event.

The cam I have pretty much chosen to use is going to be 239/254 .624"/.621" 114LSA 109ICL on LSL intake lobe and Cheater HR exhaust.

That gives me:
IVO-10.5
IVC-48.5
EVO-66.0
EVC-8.0
Overlap-18.5*

Current cam is
IVO-9.5
IVC-49.5
EVO-53.5
EVC-13.5
Overlap-23*

If anything the new cam will create more cylinder pressure by having nearly 5* less overlap than my old cam with a much smaller exhaust lobe.

I think you know it's all about valve events and just looking at one side of the coin(exhaust duration) doesn't tell you anything.