SMAX

iTrader: (11)

what is the reason for the drop between 3k and 5500?

DCx

iTrader: (12)

good question? a user on pro touring who tunes FI LSX engines offered to make me the graph. thats the file he sent me.

bygblok

iTrader: (4)

I can see a drop above 5k rpm's to free up some horsepower but that's only on big compression motors. Thats a huge drop of timing at a low RPM range unless he's spraying it from there up?

DCx

iTrader: (12)

no spray for me. i can level it out no problem. i would love to get my car dynoed. im hoping for over 400 at the wheels.

Sheephead

iTrader: (13)

I found this link on the msd sight.Online pressure units converer.
http://www.engineeringtoolbox.com/pr...ter-d_569.html

VintageCamaroChris

iTrader: (3)

The MSD box says it uses a 24x reluctor.. i have an L92 which I think is a 58. Do I have to change the wheel or is there a way I can make the MSD work? Sorry.. Im building an L92 with a 750 holley for my 68 Camaro just trying to get all the 2 million variables figured out..

Shawn MacAnanny

iTrader: (12)

MSD 6012 is the box you will need.

woodardcoin

iTrader: (1)

performance wise anyone have thought as to what is the best overall carb or fuel infected?

DCx

iTrader: (12)

not sure about the fuel injected v carb debate but if i ever went FI i would do it like this guy.

edelbrock carb intake for FI, edelbrock FI elbow, edelbrock throttle body.

https://ls1tech.com/forums/conversions-swaps/925053-rx7-forged-370-tc78.html

Shawn MacAnanny

iTrader: (12)

Well with a carburetor your fuel atomizes much better (mixes with air) as the A/F mixture has a longer distance to travel since it is mixed at the top of the intake rather than right before the intake runner in the head. form better IMO. everywhere else the FI will. I would imagine there'd be less camThe fuel on a carb setup actually cools the intake charge since it's only running at 7psi as opposed to the 50+psi of FI which actually heats up the fuel. WOT the carb will per surge and a better idle with a carb setup though as its easier to tune for that.

Now a carb style intake will have a better performance setup as its intake runners are all just about equal length (no #7+8 starvation), they are shorter runners than the EFI manifold, They will stand up to boosted application and nitrous backfires MUCH better, and they look way cooler . Mines going to have a street scoop mounted to it and sticking out of my hood to give it an old school look since my carb choke horn just about touches my hood as it is.

Pop N Wood

iTrader: (1)

That is almost a religious discussion with some people.

The carb intake is an open plenum design that seems to have some top end air flow advantages. GM sells an LS2 crate motor in both a fuel injected and carb'd version. With the same cam and exhaust they rate the carb version at 446 HP and the FI at 405. Maybe they used a more agressive tune with the carb, but my guess the difference is more with the manifold more than the carb.

Really it comes down to what you want to do and how well each option fits your situation. They both can be made to perform.

Rodder

iTrader: (2)

Why do the elbow instead of going straight up into a 4bbl-style throttle body? I'm toying with that idea and doing a functional cowl induction air cleaner. The downside is what to do about the MAF--really don't want to run speed-density.

A_VAS

iTrader: (16)

Great discussion here.....so have I read correct, the 6010 box MSD is not the same as the Edelbrock LS1 TCM (that says "by MSD" on it) ?

I want the timing retard functions, and programmable curves so looks like the 6010 is the ticket. Nitrous, blower, all is good.

SMAX

iTrader: (11)

Get the 6010.

holley505

iTrader: (1)

No issuea at all with my CARB setup and MSD box..
*I did have to go with a different carb... the one is the pictures wasn't so good.

I am running lows 12s @112

see more pics
https://ls1tech.com/forums/conversions-swaps/899047-6-0-lq4-into-68-vette-questions.html

SMAX

iTrader: (11)

What is your set up to get low 12's? Cam specs, stall size, gears, tires???

I almost put my combo in a pro street 79 vette so I am just curious.

holley505

iTrader: (1)

I run 01 346...about 45k miles
03 heads
Edelbrock RPM manifold
AED 680 HOLLEY D.P.
Comp cam 224 112 .581/.581
TH350
hughes flywheel
hughes 10' converter 3000 stall (non locking)
stock 3.36 gear
C5 exhaust manifolds
mid america chambered 2.5 exhaust all the way out
275/60R15 Drag radials
vette drag pack rear spring and link kit
comp eng front shocks 70/30
stock rear stocks

THATs IT....

12.2@112 1.78 60ft that is shifting into 3rd right before the traps...

SMAX

iTrader: (11)

Very nice set up, and I bet you can daily drive it if you want too.

edwardzracing

iTrader: (59)

Wish this was sticked... great info... subscribing as I plan to go this route over the winter. Thanks for the great information!

Pro Stock John

iTrader: (34)

I stickied this thread, though it would be great if some more folks posted up their combos.