LS1TECH - Camaro and Firebird Forum Discussion

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-   LT1-LT4 Modifications (https://ls1tech.com/forums/lt1-lt4-modifications-31/)
-   -   Underperforming le2's? (https://ls1tech.com/forums/lt1-lt4-modifications/1687712-underperforming-le2s.html)

sweetbmxrider Nov 8, 2013 12:19 PM

Underperforming le2's?
 
Is this normal times for le2s with a big 385 lt1 thumper cam on racecar 11.1:1 scr running citgo 93 racegas?

I'm the BOOBS car...

http://i39.photobucket.com/albums/e1...ps5345ee03.jpg

http://i248.photobucket.com/albums/g...psd9451777.jpg

http://i248.photobucket.com/albums/g...psbe0d82bb.jpg

I don't get why the mph and time change so much? Is it from the better reaction timing?


bufmatmuslepants Nov 8, 2013 12:24 PM

You 60-330 shows you spun on the first run, second run shows you hooked but must have let off since your 1/8th mph was higher yet 1/4 was lower. Reaction has nothing to do with ET. You dynoed 385 IIRC, which is a bit low compared to some of the higher (12.5ish) compression AI 200 cars. I definately think the compression is holding you back.

H8R Nov 8, 2013 12:25 PM

The 60ft time . You spun or bogged or something on the first run.
look at the 1/8th mile, you were almost a full second faster on the second run.
The car is rolling out pretty good.

Shownomercy Nov 8, 2013 12:28 PM

You should ditch those crappy stock castings and put on the LT4 top end kit, I think that should help.

93M6Formula Nov 8, 2013 01:03 PM


Originally Posted by Shownomercy (Post 17809483)
You should ditch those crappy stock castings and put on the LT4 top end kit, I think that should help.

I remember when I read Summit catalogs from 1995.

Shownomercy Nov 8, 2013 01:12 PM


Originally Posted by 93M6Formula (Post 17809558)
I remember when I read Summit catalogs from 1995.

Are you saying they are bad? The "Hotcam" is a solid performer and it should easily do +425rwhp

kgkern01 Nov 8, 2013 01:53 PM


Originally Posted by Shownomercy (Post 17809582)
Are you saying they are bad? The "Hotcam" is a solid performer and it should easily do +425fwhp

Fixed.

Ed Wright Nov 8, 2013 02:58 PM

That car is very slow, but how can you say it is the heads?

Puck Nov 8, 2013 03:33 PM

He's trolling lol.

11.09 @ 115 :lol:.

Shownomercy Nov 8, 2013 04:11 PM


Originally Posted by Ed Wright (Post 17809836)
That car is very slow, but how can you say it is the heads?

Cause aftermarket edelbrock stuff would be much better with like a GM847 for a pure "race" car.


Originally Posted by Puck (Post 17809920)
He's trolling lol.

11.09 @ 115 :lol:.

It is pretty slow for the mods it has, maybe the race weight is too little?

stevo9389 Nov 8, 2013 10:36 PM

LOL @ Citgo 93 race gas

stngh8r Nov 9, 2013 12:09 AM

11.0 and 121 doesn't sound bad to me?

sweetbmxrider Nov 11, 2013 10:51 AM


Originally Posted by Ed Wright (Post 17809836)
That car is very slow, but how can you say it is the heads?

I know, they didn't come from advanced induction :(

Ed Wright Nov 11, 2013 11:47 AM

I've made some pretty good power with Lloyd's heads.

Shownomercy Nov 11, 2013 12:08 PM


Originally Posted by sweetbmxrider (Post 17815784)
I know, they didn't come from advanced induction :(

Telling you, sell those lame nuggets and get yourself the LT4 topend kit, Summit says its guarenteed 440hp.

Then you will run like low 10s I think if you get a naws shot on it.

HellTeeOne Nov 11, 2013 08:53 PM

Did you slam on brakes before the 1/4 traps on the second pass?

Ed Wright Nov 11, 2013 09:12 PM


Originally Posted by Shownomercy (Post 17815967)
Telling you, sell those lame nuggets and get yourself the LT4 topend kit, Summit says its guarenteed 440hp.

Then you will run like low 10s I think if you get a naws shot on it.

Can't see a guarantee like that when you don't know how sharp the engine builder and tuner might be. Just because they will SUPPORT that much power certainly does not mean a given engine will make that much. More to it than having a local machine shop machine everything and bolting one together.

Shownomercy Nov 12, 2013 07:38 AM


Originally Posted by Ed Wright (Post 17817264)
Can't see a guarantee like that when you don't know how sharp the engine builder and tuner might be. Just because they will SUPPORT that much power certainly does not mean a given engine will make that much. More to it than having a local machine shop machine everything and bolting one together.

probably would need an expert to adjust the valve train right?

sweetbmxrider Nov 12, 2013 10:30 AM

First pass I had 21 psi in the rears and spun, probably were a little cold too. Started hooking at 19 psi and a little more heat. That second slip I left the car in overdrive like a newb, heard it shift, and got out of it :lol:

http://i248.photobucket.com/albums/g...ps84583abf.jpg

http://i248.photobucket.com/albums/g...psc641a6d4.jpg

http://i248.photobucket.com/albums/g...ps1debbd8c.jpg

The air was really good. I can't decide if I want to max this setup out or what....guess I have all winter to pile up boxes :lol: It was fun driving to the track, swapping wheels, running 10s, and driving home. Weight was like 3370 with me and around 3/4 tank. I thought it was pretty cool for little ole hand ported le2's.

HellTeeOne Nov 12, 2013 12:26 PM

Looks like you have a great running setup, congrats.

SR or HR camshaft?


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